WIP: Moved sources int src/, separated most of the source code from Perl.

The XS was left only for the unit / integration tests, and it links
libslic3r only. No wxWidgets are allowed to be used from Perl starting
from now.

src/slic3r/AppController.cpp

@@ -0,0 +1,167 @@
+#include "AppController.hpp"
+
+#include <future>
+#include <chrono>
+#include <sstream>
+#include <cstdarg>
+#include <thread>
+#include <unordered_map>
+
+#include <slic3r/GUI/GUI.hpp>
+#include <ModelArrange.hpp>
+#include <slic3r/GUI/PresetBundle.hpp>
+
+#include <Geometry.hpp>
+#include <PrintConfig.hpp>
+#include <Print.hpp>
+#include <Model.hpp>
+#include <Utils.hpp>
+
+namespace Slic3r {
+
+class AppControllerBoilerplate::PriData {
+public:
+    std::mutex m;
+    std::thread::id ui_thread;
+
+    inline explicit PriData(std::thread::id uit): ui_thread(uit) {}
+};
+
+AppControllerBoilerplate::AppControllerBoilerplate()
+    :pri_data_(new PriData(std::this_thread::get_id())) {}
+
+AppControllerBoilerplate::~AppControllerBoilerplate() {
+    pri_data_.reset();
+}
+
+bool AppControllerBoilerplate::is_main_thread() const
+{
+    return pri_data_->ui_thread == std::this_thread::get_id();
+}
+
+namespace GUI {
+PresetBundle* get_preset_bundle();
+}
+
+AppControllerBoilerplate::ProgresIndicatorPtr
+AppControllerBoilerplate::global_progress_indicator() {
+    ProgresIndicatorPtr ret;
+
+    pri_data_->m.lock();
+    ret = global_progressind_;
+    pri_data_->m.unlock();
+
+    return ret;
+}
+
+void AppControllerBoilerplate::global_progress_indicator(
+        AppControllerBoilerplate::ProgresIndicatorPtr gpri)
+{
+    pri_data_->m.lock();
+    global_progressind_ = gpri;
+    pri_data_->m.unlock();
+}
+
+void ProgressIndicator::message_fmt(
+        const std::string &fmtstr, ...) {
+    std::stringstream ss;
+    va_list args;
+    va_start(args, fmtstr);
+
+    auto fmt = fmtstr.begin();
+
+    while (*fmt != '\0') {
+        if (*fmt == 'd') {
+            int i = va_arg(args, int);
+            ss << i << '\n';
+        } else if (*fmt == 'c') {
+            // note automatic conversion to integral type
+            int c = va_arg(args, int);
+            ss << static_cast<char>(c) << '\n';
+        } else if (*fmt == 'f') {
+            double d = va_arg(args, double);
+            ss << d << '\n';
+        }
+        ++fmt;
+    }
+
+    va_end(args);
+    message(ss.str());
+}
+
+void AppController::arrange_model()
+{
+    using Coord = libnest2d::TCoord<libnest2d::PointImpl>;
+
+    if(arranging_.load()) return;
+
+    // to prevent UI reentrancies
+    arranging_.store(true);
+
+    unsigned count = 0;
+    for(auto obj : model_->objects) count += obj->instances.size();
+
+    auto pind = global_progress_indicator();
+
+    float pmax = 1.0;
+
+    if(pind) {
+        pmax = pind->max();
+
+        // Set the range of the progress to the object count
+        pind->max(count);
+
+        pind->on_cancel([this](){
+            arranging_.store(false);
+        });
+    }
+
+    auto dist = print_ctl()->config().min_object_distance();
+
+    // Create the arranger config
+    auto min_obj_distance = static_cast<Coord>(dist/SCALING_FACTOR);
+
+    auto& bedpoints = print_ctl()->config().bed_shape.values;
+    Polyline bed; bed.points.reserve(bedpoints.size());
+    for(auto& v : bedpoints)
+        bed.append(Point::new_scale(v(0), v(1)));
+
+    if(pind) pind->update(0, L("Arranging objects..."));
+
+    try {
+        arr::BedShapeHint hint;
+        // TODO: from Sasha from GUI
+        hint.type = arr::BedShapeType::WHO_KNOWS;
+
+        arr::arrange(*model_,
+                      min_obj_distance,
+                      bed,
+                      hint,
+                      false, // create many piles not just one pile
+                      [this, pind, count](unsigned rem) {
+            if(pind)
+                pind->update(count - rem, L("Arranging objects..."));
+
+            process_events();
+        }, [this] () { return !arranging_.load(); });
+    } catch(std::exception& e) {
+        std::cerr << e.what() << std::endl;
+        report_issue(IssueType::ERR,
+                        L("Could not arrange model objects! "
+                        "Some geometries may be invalid."),
+                        L("Exception occurred"));
+    }
+
+    // Restore previous max value
+    if(pind) {
+        pind->max(pmax);
+        pind->update(0, arranging_.load() ? L("Arranging done.") :
+                                            L("Arranging canceled."));
+
+        pind->on_cancel(/*remove cancel function*/);
+    }
+
+    arranging_.store(false);
+}
+
+}

src/slic3r/AppController.hpp

@@ -0,0 +1,263 @@
+#ifndef APPCONTROLLER_HPP
+#define APPCONTROLLER_HPP
+
+#include <string>
+#include <vector>
+#include <memory>
+#include <atomic>
+#include <iostream>
+
+#include "GUI/ProgressIndicator.hpp"
+
+#include <PrintConfig.hpp>
+
+namespace Slic3r {
+
+class Model;
+class Print;
+class PrintObject;
+class PrintConfig;
+class ProgressStatusBar;
+class DynamicPrintConfig;
+
+/**
+ * @brief A boilerplate class for creating application logic. It should provide
+ * features as issue reporting and progress indication, etc...
+ *
+ * The lower lever UI independent classes can be manipulated with a subclass
+ * of this controller class. We can also catch any exceptions that lower level
+ * methods could throw and display appropriate errors and warnings.
+ *
+ * Note that the outer and the inner interface of this class is free from any
+ * UI toolkit dependencies. We can implement it with any UI framework or make it
+ * a cli client.
+ */
+class AppControllerBoilerplate {
+public:
+
+    /// A Progress indicator object smart pointer
+    using ProgresIndicatorPtr = std::shared_ptr<ProgressIndicator>;
+
+private:
+    class PriData;   // Some structure to store progress indication data
+
+    // Pimpl data for thread safe progress indication features
+    std::unique_ptr<PriData> pri_data_;
+
+public:
+
+    AppControllerBoilerplate();
+    ~AppControllerBoilerplate();
+
+    using Path = std::string;
+    using PathList = std::vector<Path>;
+
+    /// Common runtime issue types
+    enum class IssueType {
+        INFO,
+        WARN,
+        WARN_Q,     // Warning with a question to continue
+        ERR,
+        FATAL
+    };
+
+    /**
+     * @brief Query some paths from the user.
+     *
+     * It should display a file chooser dialog in case of a UI application.
+     * @param title Title of a possible query dialog.
+     * @param extensions Recognized file extensions.
+     * @return Returns a list of paths choosed by the user.
+     */
+    PathList query_destination_paths(
+            const std::string& title,
+            const std::string& extensions) const;
+
+    /**
+     * @brief Same as query_destination_paths but works for directories only.
+     */
+    PathList query_destination_dirs(
+            const std::string& title) const;
+
+    /**
+     * @brief Same as query_destination_paths but returns only one path.
+     */
+    Path query_destination_path(
+            const std::string& title,
+            const std::string& extensions,
+            const std::string& hint = "") const;
+
+    /**
+     * @brief Report an issue to the user be it fatal or recoverable.
+     *
+     * In a UI app this should display some message dialog.
+     *
+     * @param issuetype The type of the runtime issue.
+     * @param description A somewhat longer description of the issue.
+     * @param brief A very brief description. Can be used for message dialog
+     * title.
+     */
+    bool report_issue(IssueType issuetype,
+                      const std::string& description,
+                      const std::string& brief);
+
+    bool report_issue(IssueType issuetype,
+                      const std::string& description);
+
+    /**
+     * @brief Return the global progress indicator for the current controller.
+     * Can be empty as well.
+     *
+     * Only one thread should use the global indicator at a time.
+     */
+    ProgresIndicatorPtr global_progress_indicator();
+
+    void global_progress_indicator(ProgresIndicatorPtr gpri);
+
+    /**
+     * @brief A predicate telling the caller whether it is the thread that
+     * created the AppConroller object itself. This probably means that the
+     * execution is in the UI thread. Otherwise it returns false meaning that
+     * some worker thread called this function.
+     * @return Return true for the same caller thread that created this
+     * object and false for every other.
+     */
+    bool is_main_thread() const;
+
+    /**
+     * @brief The frontend supports asynch execution.
+     *
+     * A Graphic UI will support this, a CLI may not. This can be used in
+     * subclass methods to decide whether to start threads for block free UI.
+     *
+     * Note that even a progress indicator's update called regularly can solve
+     * the blocking UI problem in some cases even when an event loop is present.
+     * This is how wxWidgets gauge work but creating a separate thread will make
+     * the UI even more fluent.
+     *
+     * @return true if a job or method can be executed asynchronously, false
+     * otherwise.
+     */
+    bool supports_asynch() const;
+
+    void process_events();
+
+protected:
+
+    /**
+     * @brief Create a new progress indicator and return a smart pointer to it.
+     * @param statenum The number of states for the given procedure.
+     * @param title The title of the procedure.
+     * @param firstmsg The message for the first subtask to be displayed.
+     * @return Smart pointer to the created object.
+     */
+    ProgresIndicatorPtr create_progress_indicator(
+            unsigned statenum,
+            const std::string& title,
+            const std::string& firstmsg) const;
+
+    ProgresIndicatorPtr create_progress_indicator(
+            unsigned statenum,
+            const std::string& title) const;
+
+    // This is a global progress indicator placeholder. In the Slic3r UI it can
+    // contain the progress indicator on the statusbar.
+    ProgresIndicatorPtr global_progressind_;
+};
+
+#if 0
+/**
+ * @brief Implementation of the printing logic.
+ */
+class PrintController: public AppControllerBoilerplate {
+    Print *print_ = nullptr;
+public:
+
+    // Must be public for perl to use it
+    explicit inline PrintController(Print *print): print_(print) {}
+
+    PrintController(const PrintController&) = delete;
+    PrintController(PrintController&&) = delete;
+
+    using Ptr = std::unique_ptr<PrintController>;
+
+    inline static Ptr create(Print *print) {
+        return PrintController::Ptr( new PrintController(print) );
+    }
+
+    void slice() {}
+    void slice_to_png() {}
+
+    const PrintConfig& config() const;
+};
+#else
+class PrintController: public AppControllerBoilerplate {
+public:
+    using Ptr = std::unique_ptr<PrintController>;
+    explicit inline PrintController(Print *print){}
+    inline static Ptr create(Print *print) {
+        return PrintController::Ptr( new PrintController(print) );
+    }
+    void slice() {}
+    void slice_to_png() {}
+    const PrintConfig& config() const { static PrintConfig cfg; return cfg; }
+};
+#endif
+
+/**
+ * @brief Top level controller.
+ */
+class AppController: public AppControllerBoilerplate {
+    Model *model_ = nullptr;
+    PrintController::Ptr printctl;
+    std::atomic<bool> arranging_;
+public:
+
+    /**
+     * @brief Get the print controller object.
+     *
+     * @return Return a raw pointer instead of a smart one for perl to be able
+     * to use this function and access the print controller.
+     */
+    PrintController * print_ctl() { return printctl.get(); }
+
+    /**
+     * @brief Set a model object.
+     *
+     * @param model A raw pointer to the model object. This can be used from
+     * perl.
+     */
+    void set_model(Model *model) { model_ = model; }
+
+    /**
+     * @brief Set the print object from perl.
+     *
+     * This will create a print controller that will then be accessible from
+     * perl.
+     * @param print A print object which can be a perl-ish extension as well.
+     */
+    void set_print(Print *print) {
+        printctl = PrintController::create(print);
+    }
+
+    /**
+     * @brief Set up a global progress indicator.
+     *
+     * In perl we have a progress indicating status bar on the bottom of the
+     * window which is defined and created in perl. We can pass the ID-s of the
+     * gauge and the statusbar id and make a wrapper implementation of the
+     * ProgressIndicator interface so we can use this GUI widget from C++.
+     *
+     * This function should be called from perl.
+     *
+     * @param gauge_id The ID of the gague widget of the status bar.
+     * @param statusbar_id The ID of the status bar.
+     */
+    void set_global_progress_indicator(ProgressStatusBar *prs);
+
+    void arrange_model();
+};
+
+}
+
+#endif // APPCONTROLLER_HPP

src/slic3r/AppControllerWx.cpp

@@ -0,0 +1,302 @@
+#include "AppController.hpp"
+
+#include <thread>
+#include <future>
+
+#include <slic3r/GUI/GUI.hpp>
+#include <slic3r/GUI/ProgressStatusBar.hpp>
+
+#include <wx/app.h>
+#include <wx/filedlg.h>
+#include <wx/msgdlg.h>
+#include <wx/progdlg.h>
+#include <wx/gauge.h>
+#include <wx/statusbr.h>
+#include <wx/event.h>
+
+// This source file implements the UI dependent methods of the AppControllers.
+// It will be clear what is needed to be reimplemented in case of a UI framework
+// change or a CLI client creation. In this particular case we use wxWidgets to
+// implement everything.
+
+namespace Slic3r {
+
+bool AppControllerBoilerplate::supports_asynch() const
+{
+    return true;
+}
+
+void AppControllerBoilerplate::process_events()
+{
+    wxYieldIfNeeded();
+}
+
+AppControllerBoilerplate::PathList
+AppControllerBoilerplate::query_destination_paths(
+        const std::string &title,
+        const std::string &extensions) const
+{
+
+    wxFileDialog dlg(wxTheApp->GetTopWindow(), _(title) );
+    dlg.SetWildcard(extensions);
+
+    dlg.ShowModal();
+
+    wxArrayString paths;
+    dlg.GetPaths(paths);
+
+    PathList ret(paths.size(), "");
+    for(auto& p : paths) ret.push_back(p.ToStdString());
+
+    return ret;
+}
+
+AppControllerBoilerplate::Path
+AppControllerBoilerplate::query_destination_path(
+        const std::string &title,
+        const std::string &extensions,
+        const std::string& hint) const
+{
+    wxFileDialog dlg(wxTheApp->GetTopWindow(), _(title) );
+    dlg.SetWildcard(extensions);
+
+    dlg.SetFilename(hint);
+
+    Path ret;
+
+    if(dlg.ShowModal() == wxID_OK) {
+        ret = Path(dlg.GetPath());
+    }
+
+    return ret;
+}
+
+bool AppControllerBoilerplate::report_issue(IssueType issuetype,
+                                 const std::string &description,
+                                 const std::string &brief)
+{
+    auto icon = wxICON_INFORMATION;
+    auto style = wxOK|wxCENTRE;
+    switch(issuetype) {
+    case IssueType::INFO:   break;
+    case IssueType::WARN:   icon = wxICON_WARNING; break;
+    case IssueType::WARN_Q: icon = wxICON_WARNING; style |= wxCANCEL; break;
+    case IssueType::ERR:
+    case IssueType::FATAL:  icon = wxICON_ERROR;
+    }
+
+    auto ret = wxMessageBox(_(description), _(brief), icon | style);
+    return ret != wxCANCEL;
+}
+
+bool AppControllerBoilerplate::report_issue(
+        AppControllerBoilerplate::IssueType issuetype,
+        const std::string &description)
+{
+    return report_issue(issuetype, description, std::string());
+}
+
+wxDEFINE_EVENT(PROGRESS_STATUS_UPDATE_EVENT, wxCommandEvent);
+
+namespace  {
+
+/*
+ * A simple thread safe progress dialog implementation that can be used from
+ * the main thread as well.
+ */
+class GuiProgressIndicator:
+        public ProgressIndicator, public wxEvtHandler {
+
+    wxProgressDialog gauge_;
+    using Base = ProgressIndicator;
+    wxString message_;
+    int range_; wxString title_;
+    bool is_asynch_ = false;
+
+    const int id_ = wxWindow::NewControlId();
+
+    // status update handler
+    void _state( wxCommandEvent& evt) {
+        unsigned st = evt.GetInt();
+        message_ = evt.GetString();
+        _state(st);
+    }
+
+    // Status update implementation
+    void _state( unsigned st) {
+        if(!gauge_.IsShown()) gauge_.ShowModal();
+        Base::state(st);
+        if(!gauge_.Update(static_cast<int>(st), message_)) {
+            cancel();
+        }
+    }
+
+public:
+
+    /// Setting whether it will be used from the UI thread or some worker thread
+    inline void asynch(bool is) { is_asynch_ = is; }
+
+    /// Get the mode of parallel operation.
+    inline bool asynch() const { return is_asynch_; }
+
+    inline GuiProgressIndicator(int range, const wxString& title,
+                                const wxString& firstmsg) :
+        gauge_(title, firstmsg, range, wxTheApp->GetTopWindow(),
+               wxPD_APP_MODAL | wxPD_AUTO_HIDE | wxPD_CAN_ABORT),
+
+        message_(firstmsg),
+        range_(range), title_(title)
+    {
+        Base::max(static_cast<float>(range));
+        Base::states(static_cast<unsigned>(range));
+
+        Bind(PROGRESS_STATUS_UPDATE_EVENT,
+             &GuiProgressIndicator::_state,
+             this, id_);
+    }
+
+    virtual void state(float val) override {
+        state(static_cast<unsigned>(val));
+    }
+
+    void state(unsigned st) {
+        // send status update event
+        if(is_asynch_) {
+            auto evt = new wxCommandEvent(PROGRESS_STATUS_UPDATE_EVENT, id_);
+            evt->SetInt(st);
+            evt->SetString(message_);
+            wxQueueEvent(this, evt);
+        } else _state(st);
+    }
+
+    virtual void message(const std::string & msg) override {
+        message_ = _(msg);
+    }
+
+    virtual void messageFmt(const std::string& fmt, ...) {
+        va_list arglist;
+        va_start(arglist, fmt);
+        message_ = wxString::Format(_(fmt), arglist);
+        va_end(arglist);
+    }
+
+    virtual void title(const std::string & title) override {
+        title_ = _(title);
+    }
+};
+}
+
+AppControllerBoilerplate::ProgresIndicatorPtr
+AppControllerBoilerplate::create_progress_indicator(
+        unsigned statenum,
+        const std::string& title,
+        const std::string& firstmsg) const
+{
+    auto pri =
+            std::make_shared<GuiProgressIndicator>(statenum, title, firstmsg);
+
+    // We set up the mode of operation depending of the creator thread's
+    // identity
+    pri->asynch(!is_main_thread());
+
+    return pri;
+}
+
+AppControllerBoilerplate::ProgresIndicatorPtr
+AppControllerBoilerplate::create_progress_indicator(
+        unsigned statenum, const std::string &title) const
+{
+    return create_progress_indicator(statenum, title, std::string());
+}
+
+namespace {
+
+class Wrapper: public ProgressIndicator, public wxEvtHandler {
+    ProgressStatusBar *sbar_;
+    using Base = ProgressIndicator;
+    wxString message_;
+    AppControllerBoilerplate& ctl_;
+
+    void showProgress(bool show = true) {
+        sbar_->show_progress(show);
+    }
+
+    void _state(unsigned st) {
+        if( st <= ProgressIndicator::max() ) {
+            Base::state(st);
+            sbar_->set_status_text(message_);
+            sbar_->set_progress(st);
+        }
+    }
+
+    // status update handler
+    void _state( wxCommandEvent& evt) {
+        unsigned st = evt.GetInt(); _state(st);
+    }
+
+    const int id_ = wxWindow::NewControlId();
+
+public:
+
+    inline Wrapper(ProgressStatusBar *sbar,
+                   AppControllerBoilerplate& ctl):
+        sbar_(sbar), ctl_(ctl)
+    {
+        Base::max(static_cast<float>(sbar_->get_range()));
+        Base::states(static_cast<unsigned>(sbar_->get_range()));
+
+        Bind(PROGRESS_STATUS_UPDATE_EVENT,
+             &Wrapper::_state,
+             this, id_);
+    }
+
+    virtual void state(float val) override {
+        state(unsigned(val));
+    }
+
+    virtual void max(float val) override {
+        if(val > 1.0) {
+            sbar_->set_range(static_cast<int>(val));
+            ProgressIndicator::max(val);
+        }
+    }
+
+    void state(unsigned st) {
+        if(!ctl_.is_main_thread()) {
+            auto evt = new wxCommandEvent(PROGRESS_STATUS_UPDATE_EVENT, id_);
+            evt->SetInt(st);
+            wxQueueEvent(this, evt);
+        } else {
+            _state(st);
+        }
+    }
+
+    virtual void message(const std::string & msg) override {
+        message_ = _(msg);
+    }
+
+    virtual void message_fmt(const std::string& fmt, ...) override {
+        va_list arglist;
+        va_start(arglist, fmt);
+        message_ = wxString::Format(_(fmt), arglist);
+        va_end(arglist);
+    }
+
+    virtual void title(const std::string & /*title*/) override {}
+
+    virtual void on_cancel(CancelFn fn) override {
+        sbar_->set_cancel_callback(fn);
+        Base::on_cancel(fn);
+    }
+
+};
+}
+
+void AppController::set_global_progress_indicator(ProgressStatusBar *prsb)
+{
+    if(prsb) {
+        global_progress_indicator(std::make_shared<Wrapper>(prsb, *this));
+    }
+}
+
+}

src/slic3r/CMakeLists.txt

@@ -0,0 +1,106 @@
+add_library(libslic3r_gui STATIC
+    ${LIBDIR}/slic3r/GUI/AboutDialog.cpp
+    ${LIBDIR}/slic3r/GUI/AboutDialog.hpp
+    ${LIBDIR}/slic3r/GUI/AppConfig.cpp
+    ${LIBDIR}/slic3r/GUI/AppConfig.hpp
+    ${LIBDIR}/slic3r/GUI/BackgroundSlicingProcess.cpp
+    ${LIBDIR}/slic3r/GUI/BackgroundSlicingProcess.hpp
+    ${LIBDIR}/slic3r/GUI/BitmapCache.cpp
+    ${LIBDIR}/slic3r/GUI/BitmapCache.hpp
+    ${LIBDIR}/slic3r/GUI/ConfigSnapshotDialog.cpp
+    ${LIBDIR}/slic3r/GUI/ConfigSnapshotDialog.hpp
+    ${LIBDIR}/slic3r/GUI/3DScene.cpp
+    ${LIBDIR}/slic3r/GUI/3DScene.hpp
+    ${LIBDIR}/slic3r/GUI/GLShader.cpp
+    ${LIBDIR}/slic3r/GUI/GLShader.hpp    
+    ${LIBDIR}/slic3r/GUI/GLCanvas3D.hpp
+    ${LIBDIR}/slic3r/GUI/GLCanvas3D.cpp
+    ${LIBDIR}/slic3r/GUI/GLCanvas3DManager.hpp
+    ${LIBDIR}/slic3r/GUI/GLCanvas3DManager.cpp
+    ${LIBDIR}/slic3r/GUI/GLGizmo.hpp
+    ${LIBDIR}/slic3r/GUI/GLGizmo.cpp
+    ${LIBDIR}/slic3r/GUI/GLTexture.hpp
+    ${LIBDIR}/slic3r/GUI/GLTexture.cpp
+    ${LIBDIR}/slic3r/GUI/GLToolbar.hpp
+    ${LIBDIR}/slic3r/GUI/GLToolbar.cpp
+    ${LIBDIR}/slic3r/GUI/Preferences.cpp
+    ${LIBDIR}/slic3r/GUI/Preferences.hpp
+    ${LIBDIR}/slic3r/GUI/Preset.cpp
+    ${LIBDIR}/slic3r/GUI/Preset.hpp
+    ${LIBDIR}/slic3r/GUI/PresetBundle.cpp
+    ${LIBDIR}/slic3r/GUI/PresetBundle.hpp
+    ${LIBDIR}/slic3r/GUI/PresetHints.cpp
+    ${LIBDIR}/slic3r/GUI/PresetHints.hpp
+    ${LIBDIR}/slic3r/GUI/GUI.cpp
+    ${LIBDIR}/slic3r/GUI/GUI.hpp
+    ${LIBDIR}/slic3r/GUI/GUI_ObjectParts.cpp
+    ${LIBDIR}/slic3r/GUI/GUI_ObjectParts.hpp
+    ${LIBDIR}/slic3r/GUI/LambdaObjectDialog.cpp
+    ${LIBDIR}/slic3r/GUI/LambdaObjectDialog.hpp
+    ${LIBDIR}/slic3r/GUI/Tab.cpp
+    ${LIBDIR}/slic3r/GUI/Tab.hpp
+    ${LIBDIR}/slic3r/GUI/TabIface.cpp
+    ${LIBDIR}/slic3r/GUI/TabIface.hpp
+    ${LIBDIR}/slic3r/GUI/Field.cpp
+    ${LIBDIR}/slic3r/GUI/Field.hpp
+    ${LIBDIR}/slic3r/GUI/OptionsGroup.cpp
+    ${LIBDIR}/slic3r/GUI/OptionsGroup.hpp
+    ${LIBDIR}/slic3r/GUI/BedShapeDialog.cpp
+    ${LIBDIR}/slic3r/GUI/BedShapeDialog.hpp
+    ${LIBDIR}/slic3r/GUI/2DBed.cpp
+    ${LIBDIR}/slic3r/GUI/2DBed.hpp
+    ${LIBDIR}/slic3r/GUI/wxExtensions.cpp
+    ${LIBDIR}/slic3r/GUI/wxExtensions.hpp
+    ${LIBDIR}/slic3r/GUI/WipeTowerDialog.cpp
+    ${LIBDIR}/slic3r/GUI/WipeTowerDialog.hpp
+    ${LIBDIR}/slic3r/GUI/RammingChart.cpp
+    ${LIBDIR}/slic3r/GUI/RammingChart.hpp
+    ${LIBDIR}/slic3r/GUI/BonjourDialog.cpp
+    ${LIBDIR}/slic3r/GUI/BonjourDialog.hpp
+    ${LIBDIR}/slic3r/GUI/ButtonsDescription.cpp
+    ${LIBDIR}/slic3r/GUI/ButtonsDescription.hpp
+    ${LIBDIR}/slic3r/Config/Snapshot.cpp
+    ${LIBDIR}/slic3r/Config/Snapshot.hpp
+    ${LIBDIR}/slic3r/Config/Version.cpp
+    ${LIBDIR}/slic3r/Config/Version.hpp    
+    ${LIBDIR}/slic3r/Utils/ASCIIFolding.cpp
+    ${LIBDIR}/slic3r/Utils/ASCIIFolding.hpp
+    ${LIBDIR}/slic3r/Utils/Serial.cpp
+    ${LIBDIR}/slic3r/Utils/Serial.hpp
+    ${LIBDIR}/slic3r/GUI/ConfigWizard.cpp
+    ${LIBDIR}/slic3r/GUI/ConfigWizard.hpp
+    ${LIBDIR}/slic3r/GUI/MsgDialog.cpp
+    ${LIBDIR}/slic3r/GUI/MsgDialog.hpp
+    ${LIBDIR}/slic3r/GUI/UpdateDialogs.cpp
+    ${LIBDIR}/slic3r/GUI/UpdateDialogs.hpp
+    ${LIBDIR}/slic3r/GUI/FirmwareDialog.cpp
+    ${LIBDIR}/slic3r/GUI/FirmwareDialog.hpp
+    ${LIBDIR}/slic3r/GUI/ProgressIndicator.hpp
+    ${LIBDIR}/slic3r/GUI/ProgressStatusBar.hpp
+    ${LIBDIR}/slic3r/GUI/ProgressStatusBar.cpp
+    ${LIBDIR}/slic3r/Utils/Http.cpp
+    ${LIBDIR}/slic3r/Utils/Http.hpp
+    ${LIBDIR}/slic3r/Utils/FixModelByWin10.cpp
+    ${LIBDIR}/slic3r/Utils/FixModelByWin10.hpp
+    ${LIBDIR}/slic3r/Utils/PrintHostSendDialog.cpp
+    ${LIBDIR}/slic3r/Utils/PrintHostSendDialog.hpp
+    ${LIBDIR}/slic3r/Utils/OctoPrint.cpp
+    ${LIBDIR}/slic3r/Utils/OctoPrint.hpp
+    ${LIBDIR}/slic3r/Utils/Duet.cpp
+    ${LIBDIR}/slic3r/Utils/Duet.hpp
+    ${LIBDIR}/slic3r/Utils/PrintHost.cpp
+    ${LIBDIR}/slic3r/Utils/PrintHost.hpp
+    ${LIBDIR}/slic3r/Utils/Bonjour.cpp
+    ${LIBDIR}/slic3r/Utils/Bonjour.hpp
+    ${LIBDIR}/slic3r/Utils/PresetUpdater.cpp
+    ${LIBDIR}/slic3r/Utils/PresetUpdater.hpp
+    ${LIBDIR}/slic3r/Utils/Time.cpp
+    ${LIBDIR}/slic3r/Utils/Time.hpp
+    ${LIBDIR}/slic3r/Utils/HexFile.cpp
+    ${LIBDIR}/slic3r/Utils/HexFile.hpp
+    ${LIBDIR}/slic3r/AppController.hpp
+    ${LIBDIR}/slic3r/AppController.cpp
+    ${LIBDIR}/slic3r/AppControllerWx.cpp
+)
+
+target_link_libraries(libslic3r_gui libslic3r avrdude)

src/slic3r/Config/Snapshot.cpp

@@ -0,0 +1,532 @@
+#include "Snapshot.hpp"
+#include "../GUI/AppConfig.hpp"
+#include "../GUI/PresetBundle.hpp"
+#include "../Utils/Time.hpp"
+
+#include <time.h>
+
+#include <boost/algorithm/string/predicate.hpp>
+#include <boost/algorithm/string/trim.hpp>
+#include <boost/nowide/cstdio.hpp>
+#include <boost/nowide/fstream.hpp>
+#include <boost/property_tree/ini_parser.hpp>
+#include <boost/property_tree/ptree.hpp>
+
+#include "../../libslic3r/libslic3r.h"
+#include "../../libslic3r/Config.hpp"
+#include "../../libslic3r/FileParserError.hpp"
+#include "../../libslic3r/Utils.hpp"
+
+#define SLIC3R_SNAPSHOTS_DIR "snapshots"
+#define SLIC3R_SNAPSHOT_FILE "snapshot.ini"
+
+namespace Slic3r { 
+namespace GUI {
+namespace Config {
+
+void Snapshot::clear()
+{
+	this->id.clear();
+	this->time_captured = 0;
+	this->slic3r_version_captured = Semver::invalid();
+	this->comment.clear();
+	this->reason = SNAPSHOT_UNKNOWN;
+	this->print.clear();
+	this->filaments.clear();
+	this->printer.clear();
+}
+
+void Snapshot::load_ini(const std::string &path)
+{
+	this->clear();
+
+	auto throw_on_parse_error = [&path](const std::string &msg) {
+		throw file_parser_error(std::string("Failed loading the snapshot file. Reason: ") + msg, path);
+	};
+
+	// Load the snapshot.ini file.
+    boost::property_tree::ptree tree;
+    try {
+        boost::nowide::ifstream ifs(path);
+        boost::property_tree::read_ini(ifs, tree);
+    } catch (const std::ifstream::failure &err) {
+        throw file_parser_error(std::string("The snapshot file cannot be loaded. Reason: ") + err.what(), path);
+    } catch (const std::runtime_error &err) {
+        throw_on_parse_error(err.what());
+    }
+
+    // Parse snapshot.ini
+    std::string group_name_vendor = "Vendor:";
+	std::string key_filament = "filament";
+    std::string key_prefix_model = "model_";
+    for (auto &section : tree) {
+    	if (section.first == "snapshot") {
+    		// Parse the common section.
+            for (auto &kvp : section.second) {
+                if (kvp.first == "id")
+                    this->id = kvp.second.data();
+                else if (kvp.first == "time_captured") {
+                	this->time_captured = Slic3r::Utils::parse_time_ISO8601Z(kvp.second.data());
+					if (this->time_captured == (time_t)-1)
+				        throw_on_parse_error("invalid timestamp");
+                } else if (kvp.first == "slic3r_version_captured") {
+                	auto semver = Semver::parse(kvp.second.data());
+                	if (! semver)
+                		throw_on_parse_error("invalid slic3r_version_captured semver");
+                	this->slic3r_version_captured = *semver;
+                } else if (kvp.first == "comment") {
+                	this->comment = kvp.second.data();
+                } else if (kvp.first == "reason") {
+                	std::string rsn = kvp.second.data();
+                	if (rsn == "upgrade")
+                		this->reason = SNAPSHOT_UPGRADE;
+                	else if (rsn == "downgrade")
+                		this->reason = SNAPSHOT_DOWNGRADE;
+                    else if (rsn == "before_rollback")
+                        this->reason = SNAPSHOT_BEFORE_ROLLBACK;
+                	else if (rsn == "user")
+                		this->reason = SNAPSHOT_USER;
+                	else
+                		this->reason = SNAPSHOT_UNKNOWN;
+                }
+            }
+    	} else if (section.first == "presets") {
+            // Load the names of the active presets.
+            for (auto &kvp : section.second) {
+                if (kvp.first == "print") {
+                    this->print = kvp.second.data();
+                } else if (boost::starts_with(kvp.first, "filament")) {
+                    int idx = 0;
+                    if (kvp.first == "filament" || sscanf(kvp.first.c_str(), "filament_%d", &idx) == 1) {
+                        if (int(this->filaments.size()) <= idx)
+                            this->filaments.resize(idx + 1, std::string());
+                        this->filaments[idx] = kvp.second.data();
+                    }
+                } else if (kvp.first == "printer") {
+                    this->printer = kvp.second.data();
+                }
+            }
+    	} else if (boost::starts_with(section.first, group_name_vendor) && section.first.size() > group_name_vendor.size()) {
+    		// Vendor specific section.
+            VendorConfig vc;
+            vc.name = section.first.substr(group_name_vendor.size());
+            for (auto &kvp : section.second) {
+            	if (kvp.first == "version" || kvp.first == "min_slic3r_version" || kvp.first == "max_slic3r_version") {
+            		// Version of the vendor specific config bundle bundled with this snapshot.            		
+                	auto semver = Semver::parse(kvp.second.data());
+                	if (! semver)
+                		throw_on_parse_error("invalid " + kvp.first + " format for " + section.first);
+					if (kvp.first == "version")
+                		vc.version.config_version = *semver;
+                	else if (kvp.first == "min_slic3r_version")
+                		vc.version.min_slic3r_version = *semver;
+                	else
+                		vc.version.max_slic3r_version = *semver;
+            	} else if (boost::starts_with(kvp.first, key_prefix_model) && kvp.first.size() > key_prefix_model.size()) {
+                    // Parse the printer variants installed for the current model.
+                    auto &set_variants = vc.models_variants_installed[kvp.first.substr(key_prefix_model.size())];
+                    std::vector<std::string> variants;
+                    if (unescape_strings_cstyle(kvp.second.data(), variants))
+                        for (auto &variant : variants)
+                            set_variants.insert(std::move(variant));
+                }
+			}
+			this->vendor_configs.emplace_back(std::move(vc));
+        }
+    }
+    // Sort the vendors lexicographically.
+    std::sort(this->vendor_configs.begin(), this->vendor_configs.begin(), 
+        [](const VendorConfig &cfg1, const VendorConfig &cfg2) { return cfg1.name < cfg2.name; });
+}
+
+static std::string reason_string(const Snapshot::Reason reason) 
+{
+    switch (reason) {
+    case Snapshot::SNAPSHOT_UPGRADE:
+        return "upgrade";
+    case Snapshot::SNAPSHOT_DOWNGRADE:
+        return "downgrade";
+    case Snapshot::SNAPSHOT_BEFORE_ROLLBACK:
+        return "before_rollback";
+    case Snapshot::SNAPSHOT_USER:
+        return "user";
+    case Snapshot::SNAPSHOT_UNKNOWN:
+    default:
+        return "unknown";
+    }
+}
+
+void Snapshot::save_ini(const std::string &path)
+{
+	boost::nowide::ofstream c;
+    c.open(path, std::ios::out | std::ios::trunc);
+    c << "# " << Slic3r::header_slic3r_generated() << std::endl;
+
+    // Export the common "snapshot".
+	c << std::endl << "[snapshot]" << std::endl;
+	c << "id = " << this->id << std::endl;
+	c << "time_captured = " << Slic3r::Utils::format_time_ISO8601Z(this->time_captured) << std::endl;
+	c << "slic3r_version_captured = " << this->slic3r_version_captured.to_string() << std::endl;
+	c << "comment = " << this->comment << std::endl;
+	c << "reason = " << reason_string(this->reason) << std::endl;
+
+    // Export the active presets at the time of the snapshot.
+	c << std::endl << "[presets]" << std::endl;
+	c << "print = " << this->print << std::endl;
+	c << "filament = " << this->filaments.front() << std::endl;
+	for (size_t i = 1; i < this->filaments.size(); ++ i)
+		c << "filament_" << std::to_string(i) << " = " << this->filaments[i] << std::endl;
+	c << "printer = " << this->printer << std::endl;
+
+    // Export the vendor configs.
+    for (const VendorConfig &vc : this->vendor_configs) {
+		c << std::endl << "[Vendor:" << vc.name << "]" << std::endl;
+		c << "version = " << vc.version.config_version.to_string() << std::endl;
+		c << "min_slic3r_version = " << vc.version.min_slic3r_version.to_string() << std::endl;
+		c << "max_slic3r_version = " << vc.version.max_slic3r_version.to_string() << std::endl;
+        // Export installed printer models and their variants.
+        for (const auto &model : vc.models_variants_installed) {
+            if (model.second.size() == 0)
+                continue;
+            const std::vector<std::string> variants(model.second.begin(), model.second.end());
+            const auto escaped = escape_strings_cstyle(variants);
+            c << "model_" << model.first << " = " << escaped << std::endl;
+        }
+    }
+    c.close();
+}
+
+void Snapshot::export_selections(AppConfig &config) const
+{
+    assert(filaments.size() >= 1);
+    config.clear_section("presets");
+    config.set("presets", "print",    print);
+    config.set("presets", "filament", filaments.front());
+	for (int i = 1; i < filaments.size(); ++i) {
+        char name[64];
+        sprintf(name, "filament_%d", i);
+        config.set("presets", name, filaments[i]);
+    }
+    config.set("presets", "printer",  printer);
+}
+
+void Snapshot::export_vendor_configs(AppConfig &config) const
+{
+    std::map<std::string, std::map<std::string, std::set<std::string>>> vendors;
+    for (const VendorConfig &vc : vendor_configs)
+        vendors[vc.name] = vc.models_variants_installed;
+    config.set_vendors(std::move(vendors));
+}
+
+// Perform a deep compare of the active print / filament / printer / vendor directories.
+// Return true if the content of the current print / filament / printer / vendor directories
+// matches the state stored in this snapshot.
+bool Snapshot::equal_to_active(const AppConfig &app_config) const
+{
+    // 1) Check, whether this snapshot contains the same set of active vendors, printer models and variants
+    // as app_config.
+    {
+        std::set<std::string> matched;
+        for (const VendorConfig &vc : this->vendor_configs) {
+            auto it_vendor_models_variants = app_config.vendors().find(vc.name);
+            if (it_vendor_models_variants == app_config.vendors().end() ||
+                it_vendor_models_variants->second != vc.models_variants_installed)
+                // There are more vendors enabled in the snapshot than currently installed.
+                return false;
+            matched.insert(vc.name);
+        }
+        for (const std::pair<std::string, std::map<std::string, std::set<std::string>>> &v : app_config.vendors())
+            if (matched.find(v.first) == matched.end() && ! v.second.empty())
+                // There are more vendors currently installed than enabled in the snapshot.
+                return false;
+    }
+
+    // 2) Check, whether this snapshot references the same set of ini files as the current state.
+    boost::filesystem::path data_dir     = boost::filesystem::path(Slic3r::data_dir());
+    boost::filesystem::path snapshot_dir = boost::filesystem::path(Slic3r::data_dir()) / SLIC3R_SNAPSHOTS_DIR / this->id;
+    for (const char *subdir : { "print", "filament", "printer", "vendor" }) {
+        boost::filesystem::path path1 = data_dir / subdir;
+        boost::filesystem::path path2 = snapshot_dir / subdir;
+        std::vector<std::string> files1, files2;
+        for (auto &dir_entry : boost::filesystem::directory_iterator(path1))
+            if (boost::filesystem::is_regular_file(dir_entry.status()) && boost::algorithm::iends_with(dir_entry.path().filename().string(), ".ini"))
+                files1.emplace_back(dir_entry.path().filename().string());
+        for (auto &dir_entry : boost::filesystem::directory_iterator(path2))
+            if (boost::filesystem::is_regular_file(dir_entry.status()) && boost::algorithm::iends_with(dir_entry.path().filename().string(), ".ini"))
+                files2.emplace_back(dir_entry.path().filename().string());
+        std::sort(files1.begin(), files1.end());
+        std::sort(files2.begin(), files2.end());
+        if (files1 != files2)
+            return false;
+        for (const std::string &filename : files1) {
+            FILE *f1 = boost::nowide::fopen((path1 / filename).string().c_str(), "rb");
+            FILE *f2 = boost::nowide::fopen((path2 / filename).string().c_str(), "rb");
+            bool same = true;
+            if (f1 && f2) {
+                char buf1[4096];
+                char buf2[4096];
+                do {
+                    size_t r1 = fread(buf1, 1, 4096, f1);
+                    size_t r2 = fread(buf2, 1, 4096, f2);
+                    if (r1 != r2 || memcmp(buf1, buf2, r1)) {
+                        same = false;
+                        break;
+                    }
+                } while (! feof(f1) || ! feof(f2));
+            } else
+                same = false;
+            if (f1)
+                fclose(f1);
+            if (f2)
+                fclose(f2);
+            if (! same)
+                return false;
+        }
+    }
+    return true;
+}
+
+size_t SnapshotDB::load_db()
+{
+	boost::filesystem::path snapshots_dir = SnapshotDB::create_db_dir();
+
+	m_snapshots.clear();
+
+    // Walk over the snapshot directories and load their index.
+    std::string errors_cummulative;
+	for (auto &dir_entry : boost::filesystem::directory_iterator(snapshots_dir))
+        if (boost::filesystem::is_directory(dir_entry.status())) {
+        	// Try to read "snapshot.ini".
+            boost::filesystem::path path_ini = dir_entry.path() / SLIC3R_SNAPSHOT_FILE;
+            Snapshot 			    snapshot;
+            try {
+            	snapshot.load_ini(path_ini.string());
+            } catch (const std::runtime_error &err) {
+                errors_cummulative += err.what();
+                errors_cummulative += "\n";
+                continue;
+			}
+            // Check that the name of the snapshot directory matches the snapshot id stored in the snapshot.ini file.
+            if (dir_entry.path().filename().string() != snapshot.id) {
+            	errors_cummulative += std::string("Snapshot ID ") + snapshot.id + " does not match the snapshot directory " + dir_entry.path().filename().string() + "\n";
+            	continue;
+            }
+            m_snapshots.emplace_back(std::move(snapshot));
+        }
+    // Sort the snapshots by their date/time.
+    std::sort(m_snapshots.begin(), m_snapshots.end(), [](const Snapshot &s1, const Snapshot &s2) { return s1.time_captured < s2.time_captured; });
+    if (! errors_cummulative.empty())
+        throw std::runtime_error(errors_cummulative);
+    return m_snapshots.size();
+}
+
+void SnapshotDB::update_slic3r_versions(std::vector<Index> &index_db)
+{
+	for (Snapshot &snapshot : m_snapshots) {
+		for (Snapshot::VendorConfig &vendor_config : snapshot.vendor_configs) {
+			auto it = std::find_if(index_db.begin(), index_db.end(), [&vendor_config](const Index &idx) { return idx.vendor() == vendor_config.name; });
+			if (it != index_db.end()) {
+				Index::const_iterator it_version = it->find(vendor_config.version.config_version);
+				if (it_version != it->end()) {
+					vendor_config.version.min_slic3r_version = it_version->min_slic3r_version;
+					vendor_config.version.max_slic3r_version = it_version->max_slic3r_version;
+				}
+			}
+		}
+	}
+}
+
+static void copy_config_dir_single_level(const boost::filesystem::path &path_src, const boost::filesystem::path &path_dst)
+{
+    if (! boost::filesystem::is_directory(path_dst) && 
+        ! boost::filesystem::create_directory(path_dst))
+        throw std::runtime_error(std::string("Slic3r was unable to create a directory at ") + path_dst.string());
+
+	for (auto &dir_entry : boost::filesystem::directory_iterator(path_src))
+        if (boost::filesystem::is_regular_file(dir_entry.status()) && boost::algorithm::iends_with(dir_entry.path().filename().string(), ".ini"))
+		    boost::filesystem::copy_file(dir_entry.path(), path_dst / dir_entry.path().filename(), boost::filesystem::copy_option::overwrite_if_exists);
+}
+
+static void delete_existing_ini_files(const boost::filesystem::path &path)
+{
+    if (! boost::filesystem::is_directory(path))
+    	return;
+	for (auto &dir_entry : boost::filesystem::directory_iterator(path))
+        if (boost::filesystem::is_regular_file(dir_entry.status()) && boost::algorithm::iends_with(dir_entry.path().filename().string(), ".ini"))
+		    boost::filesystem::remove(dir_entry.path());
+}
+
+const Snapshot&	SnapshotDB::take_snapshot(const AppConfig &app_config, Snapshot::Reason reason, const std::string &comment)
+{
+	boost::filesystem::path data_dir        = boost::filesystem::path(Slic3r::data_dir());
+	boost::filesystem::path snapshot_db_dir = SnapshotDB::create_db_dir();
+
+	// 1) Prepare the snapshot structure.
+	Snapshot snapshot;
+	// Snapshot header.
+	snapshot.time_captured 			 = Slic3r::Utils::get_current_time_utc();
+	snapshot.id 					 = Slic3r::Utils::format_time_ISO8601Z(snapshot.time_captured);
+	snapshot.slic3r_version_captured = *Semver::parse(SLIC3R_VERSION);     // XXX:  have Semver Slic3r version
+	snapshot.comment 				 = comment;
+	snapshot.reason 				 = reason;
+	// Active presets at the time of the snapshot.
+    snapshot.print   = app_config.get("presets", "print");
+    snapshot.filaments.emplace_back(app_config.get("presets", "filament"));
+    snapshot.printer = app_config.get("presets", "printer");
+    for (unsigned int i = 1; i < 1000; ++ i) {
+        char name[64];
+        sprintf(name, "filament_%d", i);
+        if (! app_config.has("presets", name))
+            break;
+	    snapshot.filaments.emplace_back(app_config.get("presets", name));
+    }
+    // Vendor specific config bundles and installed printers.
+    for (const std::pair<std::string, std::map<std::string, std::set<std::string>>> &vendor : app_config.vendors()) {
+        Snapshot::VendorConfig cfg;
+        cfg.name = vendor.first;
+        cfg.models_variants_installed = vendor.second;
+        for (auto it = cfg.models_variants_installed.begin(); it != cfg.models_variants_installed.end();)
+            if (it->second.empty())
+                cfg.models_variants_installed.erase(it ++);
+            else
+                ++ it;
+        // Read the active config bundle, parse the config version.
+        PresetBundle bundle;
+        bundle.load_configbundle((data_dir / "vendor" / (cfg.name + ".ini")).string(), PresetBundle::LOAD_CFGBUNDLE_VENDOR_ONLY);
+        for (const VendorProfile &vp : bundle.vendors)
+            if (vp.id == cfg.name)
+                cfg.version.config_version = vp.config_version;
+        // Fill-in the min/max slic3r version from the config index, if possible.
+        try {
+            // Load the config index for the vendor.
+            Index index;
+            index.load(data_dir / "vendor" / (cfg.name + ".idx"));
+            auto it = index.find(cfg.version.config_version);
+            if (it != index.end()) {
+                cfg.version.min_slic3r_version = it->min_slic3r_version;
+                cfg.version.max_slic3r_version = it->max_slic3r_version;
+            }
+        } catch (const std::runtime_error &err) {
+        }
+        snapshot.vendor_configs.emplace_back(std::move(cfg));
+    }
+
+	boost::filesystem::path snapshot_dir = snapshot_db_dir / snapshot.id;
+	boost::filesystem::create_directory(snapshot_dir);
+
+    // Backup the presets.
+    for (const char *subdir : { "print", "filament", "printer", "vendor" })
+    	copy_config_dir_single_level(data_dir / subdir, snapshot_dir / subdir);
+	snapshot.save_ini((snapshot_dir / "snapshot.ini").string());
+    assert(m_snapshots.empty() || m_snapshots.back().time_captured <= snapshot.time_captured);
+    m_snapshots.emplace_back(std::move(snapshot));
+    return m_snapshots.back();
+}
+
+const Snapshot& SnapshotDB::restore_snapshot(const std::string &id, AppConfig &app_config)
+{
+	for (const Snapshot &snapshot : m_snapshots)
+		if (snapshot.id == id) {
+			this->restore_snapshot(snapshot, app_config);
+			return snapshot;
+		}
+	throw std::runtime_error(std::string("Snapshot with id " + id + " was not found."));
+}
+
+void SnapshotDB::restore_snapshot(const Snapshot &snapshot, AppConfig &app_config)
+{
+	boost::filesystem::path data_dir        = boost::filesystem::path(Slic3r::data_dir());
+	boost::filesystem::path snapshot_db_dir = SnapshotDB::create_db_dir();
+    boost::filesystem::path snapshot_dir 	= snapshot_db_dir / snapshot.id;
+    // Remove existing ini files and restore the ini files from the snapshot.
+    for (const char *subdir : { "print", "filament", "printer", "vendor" }) {
+		delete_existing_ini_files(data_dir / subdir);
+    	copy_config_dir_single_level(snapshot_dir / subdir, data_dir / subdir);
+    }
+    // Update AppConfig with the selections of the print / filament / printer profiles
+    // and about the installed printer types and variants.
+    snapshot.export_selections(app_config);
+    snapshot.export_vendor_configs(app_config);
+}
+
+bool SnapshotDB::is_on_snapshot(AppConfig &app_config) const
+{
+    // Is the "on_snapshot" configuration value set?
+    std::string on_snapshot = app_config.get("on_snapshot");
+    if (on_snapshot.empty())
+        // No, we are not on a snapshot.
+        return false;
+    // Is the "on_snapshot" equal to the current configuration state?
+    auto it_snapshot = this->snapshot(on_snapshot);
+    if (it_snapshot != this->end() && it_snapshot->equal_to_active(app_config))
+        // Yes, we are on the snapshot.
+        return true;
+    // No, we are no more on a snapshot. Reset the state.
+    app_config.set("on_snapshot", "");
+    return false;
+}
+
+SnapshotDB::const_iterator SnapshotDB::snapshot_with_vendor_preset(const std::string &vendor_name, const Semver &config_version)
+{
+    auto it_found = m_snapshots.end();
+    Snapshot::VendorConfig key;
+    key.name = vendor_name;
+    for (auto it = m_snapshots.begin(); it != m_snapshots.end(); ++ it) {
+        const Snapshot &snapshot = *it;
+        auto it_vendor_config = std::lower_bound(snapshot.vendor_configs.begin(), snapshot.vendor_configs.end(), 
+            key, [](const Snapshot::VendorConfig &cfg1, const Snapshot::VendorConfig &cfg2) { return cfg1.name < cfg2.name; });
+        if (it_vendor_config != snapshot.vendor_configs.end() && it_vendor_config->name == vendor_name &&
+            config_version == it_vendor_config->version.config_version) {
+            // Vendor config found with the correct version.
+            // Save it, but continue searching, as we want the newest snapshot.
+            it_found = it;
+        }
+    }
+    return it_found;
+}
+
+SnapshotDB::const_iterator SnapshotDB::snapshot(const std::string &id) const
+{
+    for (const_iterator it = m_snapshots.begin(); it != m_snapshots.end(); ++ it)
+        if (it->id == id)
+            return it;
+    return m_snapshots.end();
+}
+
+boost::filesystem::path SnapshotDB::create_db_dir()
+{
+    boost::filesystem::path data_dir 	  = boost::filesystem::path(Slic3r::data_dir());
+    boost::filesystem::path snapshots_dir = data_dir / SLIC3R_SNAPSHOTS_DIR;
+    for (const boost::filesystem::path &path : { data_dir, snapshots_dir }) {
+		boost::filesystem::path subdir = path;
+        subdir.make_preferred();
+        if (! boost::filesystem::is_directory(subdir) && 
+            ! boost::filesystem::create_directory(subdir))
+            throw std::runtime_error(std::string("Slic3r was unable to create a directory at ") + subdir.string());
+    }
+    return snapshots_dir;
+}
+
+SnapshotDB& SnapshotDB::singleton()
+{
+	static SnapshotDB instance;
+	static bool       loaded = false;
+	if (! loaded) {
+		try {
+			loaded = true;
+			// Load the snapshot database.
+			instance.load_db();
+			// Load the vendor specific configuration indices.
+			std::vector<Index> index_db = Index::load_db();
+			// Update the min / max slic3r versions compatible with the configurations stored inside the snapshots
+			// based on the min / max slic3r versions defined by the vendor specific config indices.
+			instance.update_slic3r_versions(index_db);
+		} catch (std::exception &ex) {
+		}
+	}
+	return instance;
+}
+
+} // namespace Config
+} // namespace GUI
+} // namespace Slic3r

src/slic3r/Config/Snapshot.hpp

@@ -0,0 +1,129 @@
+#ifndef slic3r_GUI_Snapshot_
+#define slic3r_GUI_Snapshot_
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+
+#include <boost/filesystem.hpp>
+
+#include "Version.hpp"
+#include "../Utils/Semver.hpp"
+
+namespace Slic3r { 
+
+class AppConfig;
+
+namespace GUI {
+namespace Config {
+
+class Index;
+
+// A snapshot contains:
+// 		Slic3r.ini
+// 		vendor/
+// 		print/
+// 		filament/
+//		printer/
+class Snapshot
+{
+public:
+	enum Reason {
+		SNAPSHOT_UNKNOWN,
+		SNAPSHOT_UPGRADE,
+		SNAPSHOT_DOWNGRADE,
+		SNAPSHOT_BEFORE_ROLLBACK,
+		SNAPSHOT_USER,
+	};
+
+	Snapshot() { clear(); }
+
+	void 		clear();
+	void 		load_ini(const std::string &path);
+	void 		save_ini(const std::string &path);
+
+	// Export the print / filament / printer selections to be activated into the AppConfig.
+	void 		export_selections(AppConfig &config) const;
+	void 		export_vendor_configs(AppConfig &config) const;
+
+	// Perform a deep compare of the active print / filament / printer / vendor directories.
+	// Return true if the content of the current print / filament / printer / vendor directories
+	// matches the state stored in this snapshot.
+	bool 		equal_to_active(const AppConfig &app_config) const;
+
+	// ID of a snapshot should equal to the name of the snapshot directory.
+	// The ID contains the date/time, reason and comment to be human readable.
+	std::string					id;
+	std::time_t					time_captured;
+	// Which Slic3r version captured this snapshot?
+	Semver		 				slic3r_version_captured = Semver::invalid();
+	// Comment entered by the user at the start of the snapshot capture.
+	std::string 				comment;
+	Reason						reason;
+
+	std::string 				format_reason() const;
+
+	// Active presets at the time of the snapshot.
+	std::string 				print;
+	std::vector<std::string>	filaments;
+	std::string					printer;
+
+	// Annotation of the vendor configuration stored in the snapshot.
+	// This information is displayed to the user and used to decide compatibility
+	// of the configuration stored in the snapshot with the running Slic3r version.
+	struct VendorConfig {
+		// Name of the vendor contained in this snapshot.
+		std::string name;
+		// Version of the vendor config contained in this snapshot, along with compatibility data.
+		Version version;
+		// Which printer models of this vendor were installed, and which variants of the models?
+		std::map<std::string, std::set<std::string>> models_variants_installed;
+	};
+	// List of vendor configs contained in this snapshot, sorted lexicographically.
+	std::vector<VendorConfig> 	vendor_configs;
+};
+
+class SnapshotDB
+{
+public:
+	// Initialize the SnapshotDB singleton instance. Load the database if it has not been loaded yet.
+	static SnapshotDB&				singleton();
+
+	typedef std::vector<Snapshot>::const_iterator const_iterator;
+
+	// Load the snapshot database from the snapshots directory.
+	// If the snapshot directory or its parent does not exist yet, it will be created.
+	// Returns a number of snapshots loaded.
+	size_t 							load_db();
+	void 							update_slic3r_versions(std::vector<Index> &index_db);
+
+	// Create a snapshot directory, copy the vendor config bundles, user print/filament/printer profiles,
+	// create an index.
+	const Snapshot&					take_snapshot(const AppConfig &app_config, Snapshot::Reason reason, const std::string &comment = "");
+	const Snapshot&					restore_snapshot(const std::string &id, AppConfig &app_config);
+	void 							restore_snapshot(const Snapshot &snapshot, AppConfig &app_config);
+	// Test whether the AppConfig's on_snapshot variable points to an existing snapshot, and the existing snapshot
+	// matches the current state. If it does not match the current state, the AppConfig's "on_snapshot" ID is reset.
+	bool 							is_on_snapshot(AppConfig &app_config) const;
+	// Finds the newest snapshot, which contains a config bundle for vendor_name with config_version.
+	const_iterator					snapshot_with_vendor_preset(const std::string &vendor_name, const Semver &config_version);
+
+	const_iterator					begin()     const { return m_snapshots.begin(); }
+	const_iterator					end()       const { return m_snapshots.end(); }
+	const_iterator 					snapshot(const std::string &id) const;
+	const std::vector<Snapshot>& 	snapshots() const { return m_snapshots; }
+
+private:
+	// Create the snapshots directory if it does not exist yet.
+	static boost::filesystem::path	create_db_dir();
+
+	// Snapshots are sorted by their date/time, oldest first.
+	std::vector<Snapshot>			m_snapshots;
+};
+
+} // namespace Config
+} // namespace GUI
+} // namespace Slic3r
+
+#endif /* slic3r_GUI_Snapshot_ */

src/slic3r/Config/Version.cpp

@@ -0,0 +1,319 @@
+#include "Version.hpp"
+
+#include <boost/algorithm/string/predicate.hpp>
+#include <boost/algorithm/string/trim.hpp>
+#include <boost/nowide/fstream.hpp>
+
+#include "../../libslic3r/libslic3r.h"
+#include "../../libslic3r/Config.hpp"
+#include "../../libslic3r/FileParserError.hpp"
+#include "../../libslic3r/Utils.hpp"
+
+namespace Slic3r { 
+namespace GUI {
+namespace Config {
+
+static const Semver s_current_slic3r_semver(SLIC3R_VERSION);
+
+// Optimized lexicographic compare of two pre-release versions, ignoring the numeric suffix.
+static int compare_prerelease(const char *p1, const char *p2)
+{
+	for (;;) {
+		char c1 = *p1 ++;
+		char c2 = *p2 ++;
+		bool a1 = std::isalpha(c1) && c1 != 0;
+		bool a2 = std::isalpha(c2) && c2 != 0;
+		if (a1) {
+			if (a2) {
+				if (c1 != c2)
+					return (c1 < c2) ? -1 : 1;
+			} else
+				return 1;
+		} else {
+			if (a2)
+				return -1;
+			else
+				return 0;
+		}
+	}
+	// This shall never happen.
+	return 0;
+}
+
+bool Version::is_slic3r_supported(const Semver &slic3r_version) const
+{ 
+	if (! slic3r_version.in_range(min_slic3r_version, max_slic3r_version))
+		return false;
+	// Now verify, whether the configuration pre-release status is compatible with the Slic3r's pre-release status.
+	// Alpha Slic3r will happily load any configuration, while beta Slic3r will ignore alpha configurations etc.
+	const char *prerelease_slic3r = slic3r_version.prerelease();
+	const char *prerelease_config = this->config_version.prerelease();
+	if (prerelease_config == nullptr)
+		// Released config is always supported.
+		return true;
+	else if (prerelease_slic3r == nullptr)
+		// Released slic3r only supports released configs.
+		return false;
+	// Compare the pre-release status of Slic3r against the config.
+	// If the prerelease status of slic3r is lexicographically lower or equal 
+	// to the prerelease status of the config, accept it.
+	return compare_prerelease(prerelease_slic3r, prerelease_config) != 1;
+}
+
+bool Version::is_current_slic3r_supported() const
+{
+	return this->is_slic3r_supported(s_current_slic3r_semver);
+}
+
+#if 0
+//TODO: This test should be moved to a unit test, once we have C++ unit tests in place.
+static int version_test()
+{
+	Version v;
+	v.config_version 	 = *Semver::parse("1.1.2");
+	v.min_slic3r_version = *Semver::parse("1.38.0");
+	v.max_slic3r_version = Semver::inf();
+	assert(v.is_slic3r_supported(*Semver::parse("1.38.0")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.38.0-alpha")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.37.0-alpha")));
+	// Test the prerelease status.
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha1")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha1")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-beta")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-beta1")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-beta1")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-rc2")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0")));
+	v.config_version 	 = *Semver::parse("1.1.2-alpha");
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha1")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0-beta")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0-beta1")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0-beta1")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0-rc2")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0")));
+	v.config_version 	 = *Semver::parse("1.1.2-alpha1");
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha1")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0-beta")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0-beta1")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0-beta1")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0-rc2")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0")));
+	v.config_version 	 = *Semver::parse("1.1.2-beta");
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha1")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-beta")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-beta1")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-beta1")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0-rc")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0-rc2")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0")));
+	v.config_version 	 = *Semver::parse("1.1.2-rc");
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha1")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-beta")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-beta1")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-beta1")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-rc")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-rc2")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0")));
+	v.config_version 	 = *Semver::parse("1.1.2-rc2");
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-alpha1")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-beta")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-beta1")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-beta1")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-rc")));
+	assert(v.is_slic3r_supported(*Semver::parse("1.39.0-rc2")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.39.0")));
+	// Test the upper boundary.
+	v.config_version 	 = *Semver::parse("1.1.2");
+	v.max_slic3r_version = *Semver::parse("1.39.3-beta1");
+	assert(v.is_slic3r_supported(*Semver::parse("1.38.0")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.38.0-alpha")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.38.0-alpha1")));
+	assert(! v.is_slic3r_supported(*Semver::parse("1.37.0-alpha")));
+	return 0;
+}
+static int version_test_run = version_test();
+#endif
+
+inline char* left_trim(char *c)
+{
+	for (; *c == ' ' || *c == '\t'; ++ c);
+	return c;
+}
+
+inline char* right_trim(char *start)
+{
+	char *end = start + strlen(start) - 1;
+	for (; end >= start && (*end == ' ' || *end == '\t'); -- end);
+	*(++ end) = 0;
+	return end;
+}
+
+inline std::string unquote_value(char *value, char *end, const std::string &path, int idx_line)
+{
+	std::string svalue;
+	if (value == end) {
+		// Empty string is a valid string.
+	} else if (*value == '"') {
+		if (++ value > -- end || *end != '"')
+			throw file_parser_error("String not enquoted correctly", path, idx_line);
+		*end = 0;
+		if (! unescape_string_cstyle(value, svalue))
+			throw file_parser_error("Invalid escape sequence inside a quoted string", path, idx_line);
+	} else
+		svalue.assign(value, end);
+	return svalue;
+}
+
+inline std::string unquote_version_comment(char *value, char *end, const std::string &path, int idx_line)
+{
+	std::string svalue;
+	if (value == end) {
+		// Empty string is a valid string.
+	} else if (*value == '"') {
+		if (++ value > -- end || *end != '"')
+			throw file_parser_error("Version comment not enquoted correctly", path, idx_line);
+		*end = 0;
+		if (! unescape_string_cstyle(value, svalue))
+			throw file_parser_error("Invalid escape sequence inside a quoted version comment", path, idx_line);
+	} else
+		svalue.assign(value, end);
+	return svalue;
+}
+
+size_t Index::load(const boost::filesystem::path &path)
+{
+	m_configs.clear();
+	m_vendor = path.stem().string();
+
+    boost::nowide::ifstream ifs(path.string());
+    std::string line;
+    size_t idx_line = 0;
+    Version ver;
+    while (std::getline(ifs, line)) {
+    	++ idx_line;
+    	// Skip the initial white spaces.
+    	char *key = left_trim(const_cast<char*>(line.data()));
+		if (*key == '#')
+			// Skip a comment line.
+			continue;
+		// Right trim the line.
+		char *end = right_trim(key);
+        if (key == end)
+            // Skip an empty line.
+            continue;
+		// Keyword may only contain alphanumeric characters. Semantic version may in addition contain "+.-".
+    	char *key_end = key;
+    	bool  maybe_semver = true;
+		for (; *key_end != 0; ++ key_end) {
+			if (std::isalnum(*key_end) || strchr("+.-", *key_end) != nullptr) {
+				// It may be a semver.
+			} else if (*key_end == '_') {
+				// Cannot be a semver, but it may be a key.
+				maybe_semver = false;
+			} else
+				// End of semver or keyword.
+				break;
+    	}
+    	if (*key_end != 0 && *key_end != ' ' && *key_end != '\t' && *key_end != '=')
+    		throw file_parser_error("Invalid keyword or semantic version", path, idx_line);
+		char *value = left_trim(key_end);
+		bool  key_value_pair = *value == '=';
+		if (key_value_pair)
+			value = left_trim(value + 1);
+		*key_end = 0;
+    	boost::optional<Semver> semver;
+    	if (maybe_semver)
+    		semver = Semver::parse(key);
+		if (key_value_pair) {
+    		if (semver)
+    			throw file_parser_error("Key cannot be a semantic version", path, idx_line);\
+    		// Verify validity of the key / value pair.
+			std::string svalue = unquote_value(value, end, path.string(), idx_line);
+    		if (strcmp(key, "min_slic3r_version") == 0 || strcmp(key, "max_slic3r_version") == 0) {
+    			if (! svalue.empty())
+					semver = Semver::parse(svalue);
+		    	if (! semver)
+		    		throw file_parser_error(std::string(key) + " must referece a valid semantic version", path, idx_line);
+				if (strcmp(key, "min_slic3r_version") == 0)
+    				ver.min_slic3r_version = *semver;
+    			else
+    				ver.max_slic3r_version = *semver;
+    		} else {
+    			// Ignore unknown keys, as there may come new keys in the future.
+    		}
+			continue;
+    	}
+		if (! semver)
+			throw file_parser_error("Invalid semantic version", path, idx_line);
+		ver.config_version = *semver;
+		ver.comment = (end <= key_end) ? "" : unquote_version_comment(value, end, path.string(), idx_line);
+		m_configs.emplace_back(ver);
+    }
+
+    // Sort the configs by their version.
+    std::sort(m_configs.begin(), m_configs.end(), [](const Version &v1, const Version &v2) { return v1.config_version < v2.config_version; });
+    return m_configs.size();
+}
+
+Semver Index::version() const
+{
+    Semver ver = Semver::zero();
+    for (const Version &cv : m_configs)
+        if (cv.config_version >= ver)
+            ver = cv.config_version;
+    return ver;
+}
+
+Index::const_iterator Index::find(const Semver &ver) const
+{ 
+	Version key;
+	key.config_version = ver;
+	auto it = std::lower_bound(m_configs.begin(), m_configs.end(), key, 
+		[](const Version &v1, const Version &v2) { return v1.config_version < v2.config_version; });
+	return (it == m_configs.end() || it->config_version == ver) ? it : m_configs.end();
+}
+
+Index::const_iterator Index::recommended() const
+{
+	int idx = -1;
+	const_iterator highest = this->end();
+	for (const_iterator it = this->begin(); it != this->end(); ++ it)
+		if (it->is_current_slic3r_supported() &&
+			(highest == this->end() || highest->config_version < it->config_version))
+			highest = it;
+	return highest;
+}
+
+std::vector<Index> Index::load_db()
+{
+    boost::filesystem::path cache_dir = boost::filesystem::path(Slic3r::data_dir()) / "cache";
+
+    std::vector<Index> index_db;
+    std::string errors_cummulative;
+	for (auto &dir_entry : boost::filesystem::directory_iterator(cache_dir))
+        if (boost::filesystem::is_regular_file(dir_entry.status()) && boost::algorithm::iends_with(dir_entry.path().filename().string(), ".idx")) {
+        	Index idx;
+            try {
+            	idx.load(dir_entry.path());
+            } catch (const std::runtime_error &err) {
+                errors_cummulative += err.what();
+                errors_cummulative += "\n";
+                continue;
+			}
+            index_db.emplace_back(std::move(idx));
+        }
+
+    if (! errors_cummulative.empty())
+        throw std::runtime_error(errors_cummulative);
+    return index_db;
+}
+
+} // namespace Config
+} // namespace GUI
+} // namespace Slic3r

src/slic3r/Config/Version.hpp

@@ -0,0 +1,88 @@
+#ifndef slic3r_GUI_ConfigIndex_
+#define slic3r_GUI_ConfigIndex_
+
+#include <string>
+#include <vector>
+
+#include <boost/filesystem.hpp>
+
+#include "../../libslic3r/FileParserError.hpp"
+#include "../Utils/Semver.hpp"
+
+namespace Slic3r { 
+namespace GUI {
+namespace Config {
+
+// Configuration bundle version.
+struct Version
+{
+	// Version of this config.
+	Semver 		config_version     = Semver::invalid();
+	// Minimum Slic3r version, for which this config is applicable.
+	Semver 		min_slic3r_version = Semver::zero();
+	// Maximum Slic3r version, for which this config is recommended.
+	// Slic3r should read older configuration and upgrade to a newer format,
+	// but likely there has been a better configuration published, using the new features.
+	Semver 		max_slic3r_version = Semver::inf();
+	// Single comment line.
+	std::string comment;
+
+	bool 		is_slic3r_supported(const Semver &slicer_version) const;
+	bool 		is_current_slic3r_supported() const;
+};
+
+// Index of vendor specific config bundle versions and Slic3r compatibilities.
+// The index is being downloaded from the internet, also an initial version of the index 
+// is contained in the Slic3r installation.
+// 
+// The index has a simple format:
+//
+// min_sic3r_version = 
+// max_slic3r_version = 
+// config_version "comment"
+// config_version "comment"
+// ...
+// min_slic3r_version = 
+// max_slic3r_version = 
+// config_version comment
+// config_version comment
+// ...
+//
+// The min_slic3r_version, max_slic3r_version keys are applied to the config versions below,
+// empty slic3r version means an open interval.
+class Index
+{
+public:
+	typedef std::vector<Version>::const_iterator const_iterator;
+	// Read a config index file in the simple format described in the Index class comment.
+	// Throws Slic3r::file_parser_error and the standard std file access exceptions.
+	size_t						load(const boost::filesystem::path &path);
+
+	const std::string&			vendor() const { return m_vendor; }
+	// Returns version of the index as the highest version of all the configs.
+	// If there is no config, Semver::zero() is returned.
+	Semver						version() const;
+
+	const_iterator				begin()   const { return m_configs.begin(); }
+	const_iterator				end()     const { return m_configs.end(); }
+	const_iterator 				find(const Semver &ver) const;
+	const std::vector<Version>& configs() const { return m_configs; }
+	// Finds a recommended config to be installed for the current Slic3r version.
+	// Returns configs().end() if such version does not exist in the index. This shall never happen
+	// if the index is valid.
+	const_iterator				recommended() const;
+
+	// Load all vendor specific indices.
+	// Throws Slic3r::file_parser_error and the standard std file access exceptions.
+	static std::vector<Index>	load_db();
+
+private:
+	std::string 				m_vendor;
+	std::vector<Version>		m_configs;
+};
+
+} // namespace Config
+} // namespace GUI
+} // namespace Slic3r
+
+#endif /* slic3r_GUI_ConfigIndex_ */

src/slic3r/GUI/2DBed.cpp

@@ -0,0 +1,183 @@
+#include "2DBed.hpp"
+
+#include <wx/dcbuffer.h>
+#include "BoundingBox.hpp"
+#include "Geometry.hpp"
+#include "ClipperUtils.hpp"
+
+namespace Slic3r {
+namespace GUI {
+
+void Bed_2D::repaint()
+{
+	wxAutoBufferedPaintDC dc(this);
+	auto cw = GetSize().GetWidth();
+	auto ch = GetSize().GetHeight();
+	// when canvas is not rendered yet, size is 0, 0
+	if (cw == 0) return ; 
+
+	if (m_user_drawn_background) {
+		// On all systems the AutoBufferedPaintDC() achieves double buffering.
+		// On MacOS the background is erased, on Windows the background is not erased
+		// and on Linux / GTK the background is erased to gray color.
+		// Fill DC with the background on Windows & Linux / GTK.
+		auto color = wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT); //GetSystemColour
+		dc.SetPen(*new wxPen(color, 1, wxPENSTYLE_SOLID));
+		dc.SetBrush(*new wxBrush(color, wxBRUSHSTYLE_SOLID));
+		auto rect = GetUpdateRegion().GetBox();
+		dc.DrawRectangle(rect.GetLeft(), rect.GetTop(), rect.GetWidth(), rect.GetHeight());
+	}
+
+	// turn cw and ch from sizes to max coordinates
+	cw--;
+	ch--;
+
+	auto cbb = BoundingBoxf(Vec2d(0, 0),Vec2d(cw, ch));
+	// leave space for origin point
+	cbb.min(0) += 4;
+	cbb.max -= Vec2d(4., 4.);
+
+	// leave space for origin label
+	cbb.max(1) -= 13;
+
+	// read new size
+	cw = cbb.size()(0);
+	ch = cbb.size()(1);
+
+	auto ccenter = cbb.center();
+
+	// get bounding box of bed shape in G - code coordinates
+	auto bed_shape = m_bed_shape;
+	auto bed_polygon = Polygon::new_scale(m_bed_shape);
+	auto bb = BoundingBoxf(m_bed_shape);
+	bb.merge(Vec2d(0, 0));  // origin needs to be in the visible area
+	auto bw = bb.size()(0);
+	auto bh = bb.size()(1);
+	auto bcenter = bb.center();
+
+	// calculate the scaling factor for fitting bed shape in canvas area
+	auto sfactor = std::min(cw/bw, ch/bh);
+	auto shift = Vec2d(
+		ccenter(0) - bcenter(0) * sfactor,
+		ccenter(1) - bcenter(1) * sfactor
+		);
+	m_scale_factor = sfactor;
+	m_shift = Vec2d(shift(0) + cbb.min(0),
+					shift(1) - (cbb.max(1) - GetSize().GetHeight()));
+
+	// draw bed fill
+	dc.SetBrush(wxBrush(wxColour(255, 255, 255), wxSOLID));
+	wxPointList pt_list;
+	for (auto pt: m_bed_shape)
+	{
+		Point pt_pix = to_pixels(pt);
+		pt_list.push_back(new wxPoint(pt_pix(0), pt_pix(1)));
+	}
+	dc.DrawPolygon(&pt_list, 0, 0);
+
+	// draw grid
+	auto step = 10;  // 1cm grid
+	Polylines polylines;
+	for (auto x = bb.min(0) - fmod(bb.min(0), step) + step; x < bb.max(0); x += step) {
+		polylines.push_back(Polyline::new_scale({ Vec2d(x, bb.min(1)), Vec2d(x, bb.max(1)) }));
+	}
+	for (auto y = bb.min(1) - fmod(bb.min(1), step) + step; y < bb.max(1); y += step) {
+		polylines.push_back(Polyline::new_scale({ Vec2d(bb.min(0), y), Vec2d(bb.max(0), y) }));
+	}
+	polylines = intersection_pl(polylines, bed_polygon);
+
+	dc.SetPen(wxPen(wxColour(230, 230, 230), 1, wxSOLID));
+	for (auto pl : polylines)
+	{
+		for (size_t i = 0; i < pl.points.size()-1; i++){
+			Point pt1 = to_pixels(unscale(pl.points[i]));
+			Point pt2 = to_pixels(unscale(pl.points[i+1]));
+			dc.DrawLine(pt1(0), pt1(1), pt2(0), pt2(1));
+		}
+	}
+
+	// draw bed contour
+	dc.SetPen(wxPen(wxColour(0, 0, 0), 1, wxSOLID));
+	dc.SetBrush(wxBrush(wxColour(0, 0, 0), wxTRANSPARENT));
+	dc.DrawPolygon(&pt_list, 0, 0);
+
+	auto origin_px = to_pixels(Vec2d(0, 0));
+
+	// draw axes
+	auto axes_len = 50;
+	auto arrow_len = 6;
+	auto arrow_angle = Geometry::deg2rad(45.0);
+	dc.SetPen(wxPen(wxColour(255, 0, 0), 2, wxSOLID));  // red
+	auto x_end = Vec2d(origin_px(0) + axes_len, origin_px(1));
+	dc.DrawLine(wxPoint(origin_px(0), origin_px(1)), wxPoint(x_end(0), x_end(1)));
+	for (auto angle : { -arrow_angle, arrow_angle }){
+		auto end = Eigen::Translation2d(x_end) * Eigen::Rotation2Dd(angle) * Eigen::Translation2d(- x_end) * Eigen::Vector2d(x_end(0) - arrow_len, x_end(1));
+		dc.DrawLine(wxPoint(x_end(0), x_end(1)), wxPoint(end(0), end(1)));
+	}
+
+	dc.SetPen(wxPen(wxColour(0, 255, 0), 2, wxSOLID));  // green
+	auto y_end = Vec2d(origin_px(0), origin_px(1) - axes_len);
+	dc.DrawLine(wxPoint(origin_px(0), origin_px(1)), wxPoint(y_end(0), y_end(1)));
+	for (auto angle : { -arrow_angle, arrow_angle }) {
+		auto end = Eigen::Translation2d(y_end) * Eigen::Rotation2Dd(angle) * Eigen::Translation2d(- y_end) * Eigen::Vector2d(y_end(0), y_end(1) + arrow_len);
+		dc.DrawLine(wxPoint(y_end(0), y_end(1)), wxPoint(end(0), end(1)));
+	}
+
+	// draw origin
+	dc.SetPen(wxPen(wxColour(0, 0, 0), 1, wxSOLID));
+	dc.SetBrush(wxBrush(wxColour(0, 0, 0), wxSOLID));
+	dc.DrawCircle(origin_px(0), origin_px(1), 3);
+
+	static const auto origin_label = wxString("(0,0)");
+	dc.SetTextForeground(wxColour(0, 0, 0));
+	dc.SetFont(wxFont(10, wxDEFAULT, wxNORMAL, wxNORMAL));
+	auto extent = dc.GetTextExtent(origin_label);
+	const auto origin_label_x = origin_px(0) <= cw / 2 ? origin_px(0) + 1 : origin_px(0) - 1 - extent.GetWidth();
+	const auto origin_label_y = origin_px(1) <= ch / 2 ? origin_px(1) + 1 : origin_px(1) - 1 - extent.GetHeight();
+	dc.DrawText(origin_label, origin_label_x, origin_label_y);
+
+	// draw current position
+	if (m_pos!= Vec2d(0, 0)) {
+		auto pos_px = to_pixels(m_pos);
+		dc.SetPen(wxPen(wxColour(200, 0, 0), 2, wxSOLID));
+		dc.SetBrush(wxBrush(wxColour(200, 0, 0), wxTRANSPARENT));
+		dc.DrawCircle(pos_px(0), pos_px(1), 5);
+
+		dc.DrawLine(pos_px(0) - 15, pos_px(1), pos_px(0) + 15, pos_px(1));
+		dc.DrawLine(pos_px(0), pos_px(1) - 15, pos_px(0), pos_px(1) + 15);
+	}
+
+	m_painted = true;
+}
+
+// convert G - code coordinates into pixels
+Point Bed_2D::to_pixels(Vec2d point){
+	auto p = point * m_scale_factor + m_shift;
+	return Point(p(0), GetSize().GetHeight() - p(1)); 
+}
+
+void Bed_2D::mouse_event(wxMouseEvent event){
+	if (!m_interactive) return;
+	if (!m_painted) return;
+
+	auto pos = event.GetPosition();
+	auto point = to_units(Point(pos.x, pos.y));
+	if (event.LeftDown() || event.Dragging()) {
+		if (m_on_move)
+			m_on_move(point) ;
+		Refresh();
+	}
+}
+
+// convert pixels into G - code coordinates
+Vec2d Bed_2D::to_units(Point point){
+	return (Vec2d(point(0), GetSize().GetHeight() - point(1)) - m_shift) * (1. / m_scale_factor);
+}
+
+void Bed_2D::set_pos(Vec2d pos){
+	m_pos = pos;
+	Refresh();
+}
+
+} // GUI
+} // Slic3r

src/slic3r/GUI/2DBed.hpp

@@ -0,0 +1,52 @@
+#ifndef slic3r_2DBed_hpp_
+#define slic3r_2DBed_hpp_
+
+#include <wx/wx.h>
+#include "Config.hpp"
+
+namespace Slic3r {
+namespace GUI {
+
+class Bed_2D : public wxPanel
+{
+	bool		m_user_drawn_background = true;
+
+	bool		m_painted = false;
+	bool		m_interactive = false;
+	double		m_scale_factor;
+	Vec2d		m_shift = Vec2d::Zero();
+	Vec2d		m_pos = Vec2d::Zero();
+	std::function<void(Vec2d)>	m_on_move = nullptr;
+
+	Point		to_pixels(Vec2d point);
+	Vec2d		to_units(Point point);
+	void		repaint();
+	void		mouse_event(wxMouseEvent event);
+	void		set_pos(Vec2d pos);
+
+public:
+	Bed_2D(wxWindow* parent) 
+	{
+		Create(parent, wxID_ANY, wxDefaultPosition, wxSize(250, -1), wxTAB_TRAVERSAL);
+//		m_user_drawn_background = $^O ne 'darwin';
+#ifdef __APPLE__
+		m_user_drawn_background = false;
+#endif /*__APPLE__*/
+		Bind(wxEVT_PAINT, ([this](wxPaintEvent e) { repaint(); }));
+//		EVT_ERASE_BACKGROUND($self, sub{}) if $self->{user_drawn_background};
+//		Bind(EVT_MOUSE_EVENTS, ([this](wxMouseEvent  event){/*mouse_event()*/; }));
+		Bind(wxEVT_LEFT_DOWN, ([this](wxMouseEvent  event){ mouse_event(event); }));
+		Bind(wxEVT_MOTION, ([this](wxMouseEvent  event){ mouse_event(event); }));
+		Bind(wxEVT_SIZE, ([this](wxSizeEvent e) { Refresh(); }));
+	}
+	~Bed_2D(){}
+
+	std::vector<Vec2d>		m_bed_shape;
+		
+};
+
+
+} // GUI
+} // Slic3r
+
+#endif /* slic3r_2DBed_hpp_ */

src/slic3r/GUI/3DScene.hpp

@@ -0,0 +1,603 @@
+#ifndef slic3r_3DScene_hpp_
+#define slic3r_3DScene_hpp_
+
+#include "../../libslic3r/libslic3r.h"
+#include "../../libslic3r/Point.hpp"
+#include "../../libslic3r/Line.hpp"
+#include "../../libslic3r/TriangleMesh.hpp"
+#include "../../libslic3r/Utils.hpp"
+#include "../../libslic3r/Model.hpp"
+#include "../../slic3r/GUI/GLCanvas3DManager.hpp"
+
+class wxBitmap;
+class wxWindow;
+
+namespace Slic3r {
+
+class Print;
+class PrintObject;
+class Model;
+class ModelObject;
+class GCodePreviewData;
+class DynamicPrintConfig;
+class ExtrusionPath;
+class ExtrusionMultiPath;
+class ExtrusionLoop;
+class ExtrusionEntity;
+class ExtrusionEntityCollection;
+
+// A container for interleaved arrays of 3D vertices and normals,
+// possibly indexed by triangles and / or quads.
+class GLIndexedVertexArray {
+public:
+    GLIndexedVertexArray() : 
+        vertices_and_normals_interleaved_VBO_id(0),
+        triangle_indices_VBO_id(0),
+        quad_indices_VBO_id(0)
+        { this->setup_sizes(); }
+    GLIndexedVertexArray(const GLIndexedVertexArray &rhs) :
+        vertices_and_normals_interleaved(rhs.vertices_and_normals_interleaved),
+        triangle_indices(rhs.triangle_indices),
+        quad_indices(rhs.quad_indices),
+        vertices_and_normals_interleaved_VBO_id(0),
+        triangle_indices_VBO_id(0),
+        quad_indices_VBO_id(0)
+        { this->setup_sizes(); }
+    GLIndexedVertexArray(GLIndexedVertexArray &&rhs) :
+        vertices_and_normals_interleaved(std::move(rhs.vertices_and_normals_interleaved)),
+        triangle_indices(std::move(rhs.triangle_indices)),
+        quad_indices(std::move(rhs.quad_indices)),
+        vertices_and_normals_interleaved_VBO_id(0),
+        triangle_indices_VBO_id(0),
+        quad_indices_VBO_id(0)
+        { this->setup_sizes(); }
+
+    GLIndexedVertexArray& operator=(const GLIndexedVertexArray &rhs)
+    {
+        assert(vertices_and_normals_interleaved_VBO_id == 0);
+        assert(triangle_indices_VBO_id == 0);
+        assert(triangle_indices_VBO_id == 0);
+        this->vertices_and_normals_interleaved = rhs.vertices_and_normals_interleaved;
+        this->triangle_indices                 = rhs.triangle_indices;
+        this->quad_indices                     = rhs.quad_indices;
+        this->setup_sizes();
+        return *this;
+    }
+
+    GLIndexedVertexArray& operator=(GLIndexedVertexArray &&rhs) 
+    {
+        assert(vertices_and_normals_interleaved_VBO_id == 0);
+        assert(triangle_indices_VBO_id == 0);
+        assert(triangle_indices_VBO_id == 0);
+        this->vertices_and_normals_interleaved = std::move(rhs.vertices_and_normals_interleaved);
+        this->triangle_indices                 = std::move(rhs.triangle_indices);
+        this->quad_indices                     = std::move(rhs.quad_indices);
+        this->setup_sizes();
+        return *this;
+    }
+
+    // Vertices and their normals, interleaved to be used by void glInterleavedArrays(GL_N3F_V3F, 0, x)
+    std::vector<float> vertices_and_normals_interleaved;
+    std::vector<int>   triangle_indices;
+    std::vector<int>   quad_indices;
+
+    // When the geometry data is loaded into the graphics card as Vertex Buffer Objects,
+    // the above mentioned std::vectors are cleared and the following variables keep their original length.
+    size_t             vertices_and_normals_interleaved_size;
+    size_t             triangle_indices_size;
+    size_t             quad_indices_size;
+
+    // IDs of the Vertex Array Objects, into which the geometry has been loaded.
+    // Zero if the VBOs are not used.
+    unsigned int       vertices_and_normals_interleaved_VBO_id;
+    unsigned int       triangle_indices_VBO_id;
+    unsigned int       quad_indices_VBO_id;
+
+    void load_mesh_flat_shading(const TriangleMesh &mesh);
+    void load_mesh_full_shading(const TriangleMesh &mesh);
+
+    inline bool has_VBOs() const { return vertices_and_normals_interleaved_VBO_id != 0; }
+
+    inline void reserve(size_t sz) {
+        this->vertices_and_normals_interleaved.reserve(sz * 6);
+        this->triangle_indices.reserve(sz * 3);
+        this->quad_indices.reserve(sz * 4);
+    }
+
+    inline void push_geometry(float x, float y, float z, float nx, float ny, float nz) {
+        if (this->vertices_and_normals_interleaved.size() + 6 > this->vertices_and_normals_interleaved.capacity())
+            this->vertices_and_normals_interleaved.reserve(next_highest_power_of_2(this->vertices_and_normals_interleaved.size() + 6));
+        this->vertices_and_normals_interleaved.push_back(nx);
+        this->vertices_and_normals_interleaved.push_back(ny);
+        this->vertices_and_normals_interleaved.push_back(nz);
+        this->vertices_and_normals_interleaved.push_back(x);
+        this->vertices_and_normals_interleaved.push_back(y);
+        this->vertices_and_normals_interleaved.push_back(z);
+    };
+
+    inline void push_geometry(double x, double y, double z, double nx, double ny, double nz) {
+        push_geometry(float(x), float(y), float(z), float(nx), float(ny), float(nz));
+    }
+
+    inline void push_geometry(const Vec3d& p, const Vec3d& n) {
+        push_geometry(p(0), p(1), p(2), n(0), n(1), n(2));
+    }
+
+    inline void push_triangle(int idx1, int idx2, int idx3) {
+        if (this->triangle_indices.size() + 3 > this->vertices_and_normals_interleaved.capacity())
+            this->triangle_indices.reserve(next_highest_power_of_2(this->triangle_indices.size() + 3));
+        this->triangle_indices.push_back(idx1);
+        this->triangle_indices.push_back(idx2);
+        this->triangle_indices.push_back(idx3);
+    };
+
+    inline void push_quad(int idx1, int idx2, int idx3, int idx4) {
+        if (this->quad_indices.size() + 4 > this->vertices_and_normals_interleaved.capacity())
+            this->quad_indices.reserve(next_highest_power_of_2(this->quad_indices.size() + 4));
+        this->quad_indices.push_back(idx1);
+        this->quad_indices.push_back(idx2);
+        this->quad_indices.push_back(idx3);
+        this->quad_indices.push_back(idx4);
+    };
+
+    // Finalize the initialization of the geometry & indices,
+    // upload the geometry and indices to OpenGL VBO objects
+    // and shrink the allocated data, possibly relasing it if it has been loaded into the VBOs.
+    void finalize_geometry(bool use_VBOs);
+    // Release the geometry data, release OpenGL VBOs.
+    void release_geometry();
+    // Render either using an immediate mode, or the VBOs.
+    void render() const;
+    void render(const std::pair<size_t, size_t> &tverts_range, const std::pair<size_t, size_t> &qverts_range) const;
+
+    // Is there any geometry data stored?
+    bool empty() const { return vertices_and_normals_interleaved_size == 0; }
+
+    // Is this object indexed, or is it just a set of triangles?
+    bool indexed() const { return ! this->empty() && this->triangle_indices_size + this->quad_indices_size > 0; }
+
+    void clear() {
+        this->vertices_and_normals_interleaved.clear();
+        this->triangle_indices.clear();
+        this->quad_indices.clear();
+        this->setup_sizes();
+    }
+
+    // Shrink the internal storage to tighly fit the data stored.
+    void shrink_to_fit() { 
+        if (! this->has_VBOs())
+            this->setup_sizes();
+        this->vertices_and_normals_interleaved.shrink_to_fit();
+        this->triangle_indices.shrink_to_fit();
+        this->quad_indices.shrink_to_fit();
+    }
+
+    BoundingBoxf3 bounding_box() const {
+        BoundingBoxf3 bbox;
+        if (! this->vertices_and_normals_interleaved.empty()) {
+            bbox.defined = true;
+            bbox.min(0) = bbox.max(0) = this->vertices_and_normals_interleaved[3];
+            bbox.min(1) = bbox.max(1) = this->vertices_and_normals_interleaved[4];
+            bbox.min(2) = bbox.max(2) = this->vertices_and_normals_interleaved[5];
+            for (size_t i = 9; i < this->vertices_and_normals_interleaved.size(); i += 6) {
+                const float *verts = this->vertices_and_normals_interleaved.data() + i;
+                bbox.min(0) = std::min<coordf_t>(bbox.min(0), verts[0]);
+                bbox.min(1) = std::min<coordf_t>(bbox.min(1), verts[1]);
+                bbox.min(2) = std::min<coordf_t>(bbox.min(2), verts[2]);
+                bbox.max(0) = std::max<coordf_t>(bbox.max(0), verts[0]);
+                bbox.max(1) = std::max<coordf_t>(bbox.max(1), verts[1]);
+                bbox.max(2) = std::max<coordf_t>(bbox.max(2), verts[2]);
+            }
+        }
+        return bbox;
+    }
+
+private:
+    inline void setup_sizes() {
+        vertices_and_normals_interleaved_size = this->vertices_and_normals_interleaved.size();
+        triangle_indices_size                 = this->triangle_indices.size();
+        quad_indices_size                     = this->quad_indices.size();
+    }
+};
+
+class LayersTexture
+{
+public:
+    LayersTexture() : width(0), height(0), levels(0), cells(0) {}
+
+    // Texture data
+    std::vector<char>   data;
+    // Width of the texture, top level.
+    size_t              width;
+    // Height of the texture, top level.
+    size_t              height;
+    // For how many levels of detail is the data allocated?
+    size_t              levels;
+    // Number of texture cells allocated for the height texture.
+    size_t              cells;
+};
+
+class GLVolume {
+    struct LayerHeightTextureData
+    {
+        // ID of the layer height texture
+        unsigned int texture_id;
+        // ID of the shader used to render with the layer height texture
+        unsigned int shader_id;
+        // The print object to update when generating the layer height texture
+        const PrintObject* print_object;
+
+        float        z_cursor_relative;
+        float        edit_band_width;
+
+        LayerHeightTextureData() { reset(); }
+
+        void reset()
+        {
+            texture_id = 0;
+            shader_id = 0;
+            print_object = nullptr;
+            z_cursor_relative = 0.0f;
+            edit_band_width = 0.0f;
+        }
+
+        bool can_use() const { return (texture_id > 0) && (shader_id > 0) && (print_object != nullptr); }
+    };
+
+public:
+    static const float SELECTED_COLOR[4];
+    static const float HOVER_COLOR[4];
+    static const float OUTSIDE_COLOR[4];
+    static const float SELECTED_OUTSIDE_COLOR[4];
+
+    GLVolume(float r = 1.f, float g = 1.f, float b = 1.f, float a = 1.f);
+    GLVolume(const float *rgba) : GLVolume(rgba[0], rgba[1], rgba[2], rgba[3]) {}
+
+private:
+    // Offset of the volume to be rendered.
+    Vec3d                 m_offset;
+    // Rotation around Z axis of the volume to be rendered.
+    double                m_rotation;
+    // Scale factor of the volume to be rendered.
+    double                m_scaling_factor;
+    // World matrix of the volume to be rendered.
+    mutable Transform3f   m_world_matrix;
+    // Whether or not is needed to recalculate the world matrix.
+    mutable bool          m_world_matrix_dirty;
+    // Bounding box of this volume, in unscaled coordinates.
+    mutable BoundingBoxf3 m_transformed_bounding_box;
+    // Whether or not is needed to recalculate the transformed bounding box.
+    mutable bool          m_transformed_bounding_box_dirty;
+    // Pointer to convex hull of the original mesh, if any.
+    const TriangleMesh*   m_convex_hull;
+    // Bounding box of this volume, in unscaled coordinates.
+    mutable BoundingBoxf3 m_transformed_convex_hull_bounding_box;
+    // Whether or not is needed to recalculate the transformed convex hull bounding box.
+    mutable bool          m_transformed_convex_hull_bounding_box_dirty;
+
+public:
+
+    // Bounding box of this volume, in unscaled coordinates.
+    BoundingBoxf3       bounding_box;
+    // Color of the triangles / quads held by this volume.
+    float               color[4];
+    // Color used to render this volume.
+    float               render_color[4];
+    // An ID containing the object ID, volume ID and instance ID.
+    int                 composite_id;
+    // An ID for group selection. It may be the same for all meshes of all object instances, or for just a single object instance.
+    int                 select_group_id;
+    // An ID for group dragging. It may be the same for all meshes of all object instances, or for just a single object instance.
+    int                 drag_group_id;
+    // An ID containing the extruder ID (used to select color).
+    int                 extruder_id;
+    // Is this object selected?
+    bool                selected;
+    // Whether or not this volume is active for rendering
+    bool                is_active;
+    // Whether or not to use this volume when applying zoom_to_volumes()
+    bool                zoom_to_volumes;
+    // Wheter or not this volume is enabled for outside print volume detection in shader.
+    bool                shader_outside_printer_detection_enabled;
+    // Wheter or not this volume is outside print volume.
+    bool                is_outside;
+    // Boolean: Is mouse over this object?
+    bool                hover;
+    // Wheter or not this volume has been generated from a modifier
+    bool                is_modifier;
+    // Wheter or not this volume has been generated from the wipe tower
+    bool                is_wipe_tower;
+    // Wheter or not this volume has been generated from an extrusion path
+    bool                is_extrusion_path;
+
+    // Interleaved triangles & normals with indexed triangles & quads.
+    GLIndexedVertexArray        indexed_vertex_array;
+    // Ranges of triangle and quad indices to be rendered.
+    std::pair<size_t, size_t>   tverts_range;
+    std::pair<size_t, size_t>   qverts_range;
+
+    // If the qverts or tverts contain thick extrusions, then offsets keeps pointers of the starts
+    // of the extrusions per layer.
+    std::vector<coordf_t>       print_zs;
+    // Offset into qverts & tverts, or offsets into indices stored into an OpenGL name_index_buffer.
+    std::vector<size_t>         offsets;
+
+    void set_render_color(float r, float g, float b, float a);
+    void set_render_color(const float* rgba, unsigned int size);
+    // Sets render color in dependence of current state
+    void set_render_color();
+
+    double get_rotation();
+    void set_rotation(double rotation);
+
+    const Vec3d& get_offset() const;
+    void set_offset(const Vec3d& offset);
+
+    void set_scaling_factor(double factor);
+
+    void set_convex_hull(const TriangleMesh& convex_hull);
+
+    void set_select_group_id(const std::string& select_by);
+    void set_drag_group_id(const std::string& drag_by);
+
+    int                 object_idx() const { return this->composite_id / 1000000; }
+    int                 volume_idx() const { return (this->composite_id / 1000) % 1000; }
+    int                 instance_idx() const { return this->composite_id % 1000; }
+
+    const Transform3f&   world_matrix() const;
+    const BoundingBoxf3& transformed_bounding_box() const;
+    const BoundingBoxf3& transformed_convex_hull_bounding_box() const;
+
+    bool                empty() const { return this->indexed_vertex_array.empty(); }
+    bool                indexed() const { return this->indexed_vertex_array.indexed(); }
+
+    void                set_range(coordf_t low, coordf_t high);
+    void                render() const;
+    void                render_using_layer_height() const;
+    void                render_VBOs(int color_id, int detection_id, int worldmatrix_id) const;
+    void                render_legacy() const;
+
+    void                finalize_geometry(bool use_VBOs) { this->indexed_vertex_array.finalize_geometry(use_VBOs); }
+    void                release_geometry() { this->indexed_vertex_array.release_geometry(); }
+
+    /************************************************ Layer height texture ****************************************************/
+    std::shared_ptr<LayersTexture>  layer_height_texture;
+    // Data to render this volume using the layer height texture
+    LayerHeightTextureData layer_height_texture_data;
+
+    bool                has_layer_height_texture() const 
+        { return this->layer_height_texture.get() != nullptr; }
+    size_t              layer_height_texture_width() const 
+        { return (this->layer_height_texture.get() == nullptr) ? 0 : this->layer_height_texture->width; }
+    size_t              layer_height_texture_height() const 
+        { return (this->layer_height_texture.get() == nullptr) ? 0 : this->layer_height_texture->height; }
+    size_t              layer_height_texture_cells() const 
+        { return (this->layer_height_texture.get() == nullptr) ? 0 : this->layer_height_texture->cells; }
+    void*               layer_height_texture_data_ptr_level0() const {
+        return (layer_height_texture.get() == nullptr) ? 0 :
+            (void*)layer_height_texture->data.data();
+    }
+    void*               layer_height_texture_data_ptr_level1() const {
+        return (layer_height_texture.get() == nullptr) ? 0 :
+            (void*)(layer_height_texture->data.data() + layer_height_texture->width * layer_height_texture->height * 4);
+    }
+    double              layer_height_texture_z_to_row_id() const;
+    void                generate_layer_height_texture(const PrintObject *print_object, bool force);
+
+    void set_layer_height_texture_data(unsigned int texture_id, unsigned int shader_id, const PrintObject* print_object, float z_cursor_relative, float edit_band_width)
+    {
+        layer_height_texture_data.texture_id = texture_id;
+        layer_height_texture_data.shader_id = shader_id;
+        layer_height_texture_data.print_object = print_object;
+        layer_height_texture_data.z_cursor_relative = z_cursor_relative;
+        layer_height_texture_data.edit_band_width = edit_band_width;
+    }
+
+    void reset_layer_height_texture_data() { layer_height_texture_data.reset(); }
+};
+
+class GLVolumeCollection
+{
+    // min and max vertex of the print box volume
+    float print_box_min[3];
+    float print_box_max[3];
+
+public:
+    std::vector<GLVolume*> volumes;
+    
+    GLVolumeCollection() {};
+    ~GLVolumeCollection() { clear(); };
+
+    std::vector<int> load_object(
+        const ModelObject       *model_object,
+        int                      obj_idx,
+        const std::vector<int>  &instance_idxs,
+        const std::string       &color_by,
+        const std::string       &select_by,
+        const std::string       &drag_by,
+        bool                     use_VBOs);
+
+    int load_wipe_tower_preview(
+        int obj_idx, float pos_x, float pos_y, float width, float depth, float height, float rotation_angle, bool use_VBOs, bool size_unknown, float brim_width);
+
+    // Render the volumes by OpenGL.
+    void render_VBOs() const;
+    void render_legacy() const;
+
+    // Finalize the initialization of the geometry & indices,
+    // upload the geometry and indices to OpenGL VBO objects
+    // and shrink the allocated data, possibly relasing it if it has been loaded into the VBOs.
+    void finalize_geometry(bool use_VBOs) { for (auto *v : volumes) v->finalize_geometry(use_VBOs); }
+    // Release the geometry data assigned to the volumes.
+    // If OpenGL VBOs were allocated, an OpenGL context has to be active to release them.
+    void release_geometry() { for (auto *v : volumes) v->release_geometry(); }
+    // Clear the geometry
+    void clear() { for (auto *v : volumes) delete v; volumes.clear(); }
+
+    bool empty() const { return volumes.empty(); }
+    void set_range(double low, double high) { for (GLVolume *vol : this->volumes) vol->set_range(low, high); }
+
+    void set_print_box(float min_x, float min_y, float min_z, float max_x, float max_y, float max_z) {
+        print_box_min[0] = min_x; print_box_min[1] = min_y; print_box_min[2] = min_z;
+        print_box_max[0] = max_x; print_box_max[1] = max_y; print_box_max[2] = max_z;
+    }
+
+    // returns true if all the volumes are completely contained in the print volume
+    // returns the containment state in the given out_state, if non-null
+    bool check_outside_state(const DynamicPrintConfig* config, ModelInstance::EPrintVolumeState* out_state);
+    void reset_outside_state();
+
+    void update_colors_by_extruder(const DynamicPrintConfig* config);
+
+    void set_select_by(const std::string& select_by);
+    void set_drag_by(const std::string& drag_by);
+
+    // Returns a vector containing the sorted list of all the print_zs of the volumes contained in this collection
+    std::vector<double> get_current_print_zs(bool active_only) const;
+
+private:
+    GLVolumeCollection(const GLVolumeCollection &other);
+    GLVolumeCollection& operator=(const GLVolumeCollection &);
+};
+
+class _3DScene
+{
+    static GUI::GLCanvas3DManager s_canvas_mgr;
+
+public:
+    static void init_gl();
+    static std::string get_gl_info(bool format_as_html, bool extensions);
+    static bool use_VBOs();
+
+    static bool add_canvas(wxGLCanvas* canvas);
+    static bool remove_canvas(wxGLCanvas* canvas);
+    static void remove_all_canvases();
+
+    static bool init(wxGLCanvas* canvas);
+
+    static void set_as_dirty(wxGLCanvas* canvas);
+
+    static unsigned int get_volumes_count(wxGLCanvas* canvas);
+    static void reset_volumes(wxGLCanvas* canvas);
+    static void deselect_volumes(wxGLCanvas* canvas);
+    static void select_volume(wxGLCanvas* canvas, unsigned int id);
+    static void update_volumes_selection(wxGLCanvas* canvas, const std::vector<int>& selections);
+    static int check_volumes_outside_state(wxGLCanvas* canvas, const DynamicPrintConfig* config);
+    static bool move_volume_up(wxGLCanvas* canvas, unsigned int id);
+    static bool move_volume_down(wxGLCanvas* canvas, unsigned int id);
+
+    static void set_objects_selections(wxGLCanvas* canvas, const std::vector<int>& selections);
+
+    static void set_config(wxGLCanvas* canvas, DynamicPrintConfig* config);
+    static void set_print(wxGLCanvas* canvas, Print* print);
+    static void set_model(wxGLCanvas* canvas, Model* model);
+
+    static void set_bed_shape(wxGLCanvas* canvas, const Pointfs& shape);
+    static void set_auto_bed_shape(wxGLCanvas* canvas);
+
+    static BoundingBoxf3 get_volumes_bounding_box(wxGLCanvas* canvas);
+
+    static void set_axes_length(wxGLCanvas* canvas, float length);
+
+    static void set_cutting_plane(wxGLCanvas* canvas, float z, const ExPolygons& polygons);
+
+    static void set_color_by(wxGLCanvas* canvas, const std::string& value);
+    static void set_select_by(wxGLCanvas* canvas, const std::string& value);
+    static void set_drag_by(wxGLCanvas* canvas, const std::string& value);
+
+    static std::string get_select_by(wxGLCanvas* canvas);
+
+    static bool is_layers_editing_enabled(wxGLCanvas* canvas);
+    static bool is_layers_editing_allowed(wxGLCanvas* canvas);
+    static bool is_shader_enabled(wxGLCanvas* canvas);
+
+    static bool is_reload_delayed(wxGLCanvas* canvas);
+
+    static void enable_layers_editing(wxGLCanvas* canvas, bool enable);
+    static void enable_warning_texture(wxGLCanvas* canvas, bool enable);
+    static void enable_legend_texture(wxGLCanvas* canvas, bool enable);
+    static void enable_picking(wxGLCanvas* canvas, bool enable);
+    static void enable_moving(wxGLCanvas* canvas, bool enable);
+    static void enable_gizmos(wxGLCanvas* canvas, bool enable);
+    static void enable_toolbar(wxGLCanvas* canvas, bool enable);
+    static void enable_shader(wxGLCanvas* canvas, bool enable);
+    static void enable_force_zoom_to_bed(wxGLCanvas* canvas, bool enable);
+    static void enable_dynamic_background(wxGLCanvas* canvas, bool enable);
+    static void allow_multisample(wxGLCanvas* canvas, bool allow);
+
+    static void enable_toolbar_item(wxGLCanvas* canvas, const std::string& name, bool enable);
+    static bool is_toolbar_item_pressed(wxGLCanvas* canvas, const std::string& name);
+
+    static void zoom_to_bed(wxGLCanvas* canvas);
+    static void zoom_to_volumes(wxGLCanvas* canvas);
+    static void select_view(wxGLCanvas* canvas, const std::string& direction);
+    static void set_viewport_from_scene(wxGLCanvas* canvas, wxGLCanvas* other);
+
+    static void update_volumes_colors_by_extruder(wxGLCanvas* canvas);
+    static void update_gizmos_data(wxGLCanvas* canvas);
+
+    static void render(wxGLCanvas* canvas);
+
+    static std::vector<double> get_current_print_zs(wxGLCanvas* canvas, bool active_only);
+    static void set_toolpaths_range(wxGLCanvas* canvas, double low, double high);
+
+    static void register_on_viewport_changed_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_double_click_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_right_click_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_select_object_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_model_update_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_remove_object_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_arrange_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_rotate_object_left_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_rotate_object_right_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_scale_object_uniformly_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_increase_objects_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_decrease_objects_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_instance_moved_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_wipe_tower_moved_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_enable_action_buttons_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_gizmo_scale_uniformly_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_gizmo_rotate_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_gizmo_flatten_callback(wxGLCanvas* canvas, void* callback);
+    static void register_on_update_geometry_info_callback(wxGLCanvas* canvas, void* callback);
+
+    static void register_action_add_callback(wxGLCanvas* canvas, void* callback);
+    static void register_action_delete_callback(wxGLCanvas* canvas, void* callback);
+    static void register_action_deleteall_callback(wxGLCanvas* canvas, void* callback);
+    static void register_action_arrange_callback(wxGLCanvas* canvas, void* callback);
+    static void register_action_more_callback(wxGLCanvas* canvas, void* callback);
+    static void register_action_fewer_callback(wxGLCanvas* canvas, void* callback);
+    static void register_action_split_callback(wxGLCanvas* canvas, void* callback);
+    static void register_action_cut_callback(wxGLCanvas* canvas, void* callback);
+    static void register_action_settings_callback(wxGLCanvas* canvas, void* callback);
+    static void register_action_layersediting_callback(wxGLCanvas* canvas, void* callback);
+    static void register_action_selectbyparts_callback(wxGLCanvas* canvas, void* callback);
+
+    static std::vector<int> load_object(wxGLCanvas* canvas, const ModelObject* model_object, int obj_idx, std::vector<int> instance_idxs);
+    static std::vector<int> load_object(wxGLCanvas* canvas, const Model* model, int obj_idx);
+
+    static int get_first_volume_id(wxGLCanvas* canvas, int obj_idx);
+    static int get_in_object_volume_id(wxGLCanvas* canvas, int scene_vol_idx);
+
+    static void reload_scene(wxGLCanvas* canvas, bool force);
+
+    static void load_gcode_preview(wxGLCanvas* canvas, const GCodePreviewData* preview_data, const std::vector<std::string>& str_tool_colors);
+    static void load_preview(wxGLCanvas* canvas, const std::vector<std::string>& str_tool_colors);
+
+    static void reset_legend_texture();
+
+    static void thick_lines_to_verts(const Lines& lines, const std::vector<double>& widths, const std::vector<double>& heights, bool closed, double top_z, GLVolume& volume);
+    static void thick_lines_to_verts(const Lines3& lines, const std::vector<double>& widths, const std::vector<double>& heights, bool closed, GLVolume& volume);
+    static void extrusionentity_to_verts(const ExtrusionPath& extrusion_path, float print_z, GLVolume& volume);
+    static void extrusionentity_to_verts(const ExtrusionPath& extrusion_path, float print_z, const Point& copy, GLVolume& volume);
+    static void extrusionentity_to_verts(const ExtrusionLoop& extrusion_loop, float print_z, const Point& copy, GLVolume& volume);
+    static void extrusionentity_to_verts(const ExtrusionMultiPath& extrusion_multi_path, float print_z, const Point& copy, GLVolume& volume);
+    static void extrusionentity_to_verts(const ExtrusionEntityCollection& extrusion_entity_collection, float print_z, const Point& copy, GLVolume& volume);
+    static void extrusionentity_to_verts(const ExtrusionEntity* extrusion_entity, float print_z, const Point& copy, GLVolume& volume);
+    static void polyline3_to_verts(const Polyline3& polyline, double width, double height, GLVolume& volume);
+    static void point3_to_verts(const Vec3crd& point, double width, double height, GLVolume& volume);
+};
+
+}
+
+#endif

src/slic3r/GUI/AboutDialog.cpp

@@ -0,0 +1,136 @@
+#include "AboutDialog.hpp"
+
+#include "../../libslic3r/Utils.hpp"
+
+namespace Slic3r { 
+namespace GUI {
+
+AboutDialogLogo::AboutDialogLogo(wxWindow* parent)
+    : wxPanel(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize)
+{
+    this->SetBackgroundColour(*wxWHITE);
+    this->logo = wxBitmap(from_u8(Slic3r::var("Slic3r_192px.png")), wxBITMAP_TYPE_PNG);
+    this->SetMinSize(this->logo.GetSize());
+    
+    this->Bind(wxEVT_PAINT, &AboutDialogLogo::onRepaint, this);
+}
+
+void AboutDialogLogo::onRepaint(wxEvent &event)
+{
+    wxPaintDC dc(this);
+    dc.SetBackgroundMode(wxTRANSPARENT);
+
+    wxSize size = this->GetSize();
+    int logo_w = this->logo.GetWidth();
+    int logo_h = this->logo.GetHeight();
+    dc.DrawBitmap(this->logo, (size.GetWidth() - logo_w)/2, (size.GetHeight() - logo_h)/2, true);
+
+    event.Skip();
+}
+
+AboutDialog::AboutDialog()
+    : wxDialog(NULL, wxID_ANY, _(L("About Slic3r")), wxDefaultPosition, wxDefaultSize, wxCAPTION)
+{
+	wxColour bgr_clr = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
+	SetBackgroundColour(bgr_clr);
+    wxBoxSizer* hsizer = new wxBoxSizer(wxHORIZONTAL);
+
+	auto main_sizer = new wxBoxSizer(wxVERTICAL);
+	main_sizer->Add(hsizer, 0, wxEXPAND | wxALL, 20);
+
+    // logo
+	wxBitmap logo_bmp = wxBitmap(from_u8(Slic3r::var("Slic3r_192px.png")), wxBITMAP_TYPE_PNG);
+	auto *logo = new wxStaticBitmap(this, wxID_ANY, std::move(logo_bmp));
+	hsizer->Add(logo, 1, wxALIGN_CENTRE_VERTICAL | wxEXPAND | wxTOP | wxBOTTOM, 35);
+    
+    wxBoxSizer* vsizer = new wxBoxSizer(wxVERTICAL);
+#ifdef __WXMSW__
+	int proportion = 2;
+#else
+	int proportion = 3;
+#endif
+    hsizer->Add(vsizer, proportion, wxEXPAND|wxLEFT, 20);
+
+    // title
+    {
+        wxStaticText* title = new wxStaticText(this, wxID_ANY, "Slic3r Prusa Edition", wxDefaultPosition, wxDefaultSize);
+        wxFont title_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+        title_font.SetWeight(wxFONTWEIGHT_BOLD);
+        title_font.SetFamily(wxFONTFAMILY_ROMAN);
+        title_font.SetPointSize(24);
+        title->SetFont(title_font);
+        vsizer->Add(title, 0, wxALIGN_LEFT | wxTOP, 10);
+    }
+    
+    // version
+    {
+        auto version_string = _(L("Version"))+ " " + std::string(SLIC3R_VERSION);
+        wxStaticText* version = new wxStaticText(this, wxID_ANY, version_string.c_str(), wxDefaultPosition, wxDefaultSize);
+        wxFont version_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+        #ifdef __WXMSW__
+            version_font.SetPointSize(9);
+        #else
+            version_font.SetPointSize(11);
+        #endif
+        version->SetFont(version_font);
+        vsizer->Add(version, 0, wxALIGN_LEFT | wxBOTTOM, 10);
+    }
+    
+    // text
+    wxHtmlWindow* html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO/*NEVER*/);
+    {
+        wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+        const auto text_clr = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
+		auto text_clr_str = wxString::Format(wxT("#%02X%02X%02X"), text_clr.Red(), text_clr.Green(), text_clr.Blue());
+		auto bgr_clr_str = wxString::Format(wxT("#%02X%02X%02X"), bgr_clr.Red(), bgr_clr.Green(), bgr_clr.Blue());
+
+		const int fs = font.GetPointSize()-1;
+        int size[] = {fs,fs,fs,fs,fs,fs,fs};
+        html->SetFonts(font.GetFaceName(), font.GetFaceName(), size);
+        html->SetBorders(2);
+		const auto text = wxString::Format(
+            "<html>"
+            "<body bgcolor= %s link= %s>"
+            "<font color=%s>"
+            "Copyright &copy; 2016-2018 Prusa Research. <br />"
+            "Copyright &copy; 2011-2017 Alessandro Ranellucci. <br />"
+            "<a href=\"http://slic3r.org/\">Slic3r</a> is licensed under the "
+            "<a href=\"http://www.gnu.org/licenses/agpl-3.0.html\">GNU Affero General Public License, version 3</a>."
+            "<br /><br />"
+            "Contributions by Henrik Brix Andersen, Nicolas Dandrimont, Mark Hindess, Petr Ledvina, Joseph Lenox, Y. Sapir, Mike Sheldrake, Vojtech Bubnik and numerous others. "
+            "Manual by Gary Hodgson. Inspired by the RepRap community. <br />"
+            "Slic3r logo designed by Corey Daniels, <a href=\"http://www.famfamfam.com/lab/icons/silk/\">Silk Icon Set</a> designed by Mark James. "
+            "</font>"
+            "</body>"
+            "</html>", bgr_clr_str, text_clr_str, text_clr_str);
+        html->SetPage(text);
+        vsizer->Add(html, 1, wxEXPAND | wxBOTTOM, 10);
+        html->Bind(wxEVT_HTML_LINK_CLICKED, &AboutDialog::onLinkClicked, this);
+    }
+    
+    wxStdDialogButtonSizer* buttons = this->CreateStdDialogButtonSizer(wxCLOSE);
+    this->SetEscapeId(wxID_CLOSE);
+    this->Bind(wxEVT_BUTTON, &AboutDialog::onCloseDialog, this, wxID_CLOSE);
+    vsizer->Add(buttons, 0, wxEXPAND | wxRIGHT | wxBOTTOM, 3);
+    
+    this->Bind(wxEVT_LEFT_DOWN, &AboutDialog::onCloseDialog, this);
+    logo->Bind(wxEVT_LEFT_DOWN, &AboutDialog::onCloseDialog, this);
+
+	SetSizer(main_sizer);
+	main_sizer->SetSizeHints(this);
+}
+
+void AboutDialog::onLinkClicked(wxHtmlLinkEvent &event)
+{
+    wxLaunchDefaultBrowser(event.GetLinkInfo().GetHref());
+    event.Skip(false);
+}
+
+void AboutDialog::onCloseDialog(wxEvent &)
+{
+    this->EndModal(wxID_CLOSE);
+    this->Close();
+}
+
+} // namespace GUI
+} // namespace Slic3r

src/slic3r/GUI/AboutDialog.hpp

@@ -0,0 +1,36 @@
+#ifndef slic3r_GUI_AboutDialog_hpp_
+#define slic3r_GUI_AboutDialog_hpp_
+
+#include "GUI.hpp"
+
+#include <wx/wx.h>
+#include <wx/intl.h>
+#include <wx/html/htmlwin.h>
+
+namespace Slic3r { 
+namespace GUI {
+
+class AboutDialogLogo : public wxPanel
+{
+public:
+    AboutDialogLogo(wxWindow* parent);
+    
+private:
+    wxBitmap logo;
+    void onRepaint(wxEvent &event);
+};
+
+class AboutDialog : public wxDialog
+{
+public:
+    AboutDialog();
+    
+private:
+    void onLinkClicked(wxHtmlLinkEvent &event);
+    void onCloseDialog(wxEvent &);
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif

src/slic3r/GUI/AppConfig.cpp

@@ -0,0 +1,266 @@
+#include "../../libslic3r/libslic3r.h"
+#include "../../libslic3r/Utils.hpp"
+#include "AppConfig.hpp"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <utility>
+#include <assert.h>
+#include <vector>
+#include <stdexcept>
+
+#include <boost/filesystem.hpp>
+#include <boost/nowide/cenv.hpp>
+#include <boost/nowide/fstream.hpp>
+#include <boost/property_tree/ini_parser.hpp>
+#include <boost/property_tree/ptree.hpp>
+#include <boost/algorithm/string/predicate.hpp>
+
+namespace Slic3r {
+
+static const std::string VENDOR_PREFIX = "vendor:";
+static const std::string MODEL_PREFIX = "model:";
+static const std::string VERSION_CHECK_URL = "https://raw.githubusercontent.com/prusa3d/Slic3r-settings/master/live/Slic3rPE.version";
+
+void AppConfig::reset()
+{
+    m_storage.clear();
+    set_defaults();
+};
+
+// Override missing or keys with their defaults.
+void AppConfig::set_defaults()
+{
+    // Reset the empty fields to defaults.
+    if (get("autocenter").empty())
+        set("autocenter", "0");
+    // Disable background processing by default as it is not stable.
+    if (get("background_processing").empty())
+        set("background_processing", "0");
+    // If set, the "Controller" tab for the control of the printer over serial line and the serial port settings are hidden.
+    // By default, Prusa has the controller hidden.
+    if (get("no_controller").empty())
+        set("no_controller", "1");
+    // If set, the "- default -" selections of print/filament/printer are suppressed, if there is a valid preset available.
+    if (get("no_defaults").empty())
+        set("no_defaults", "1");
+    if (get("show_incompatible_presets").empty())
+        set("show_incompatible_presets", "0");
+
+    if (get("version_check").empty())
+        set("version_check", "1");
+    if (get("preset_update").empty())
+        set("preset_update", "1");
+
+    // Use OpenGL 1.1 even if OpenGL 2.0 is available. This is mainly to support some buggy Intel HD Graphics drivers.
+    // https://github.com/prusa3d/Slic3r/issues/233
+    if (get("use_legacy_opengl").empty())
+        set("use_legacy_opengl", "0");
+
+    if (get("remember_output_path").empty())
+        set("remember_output_path", "1");
+
+    // Remove legacy window positions/sizes
+    erase("", "main_frame_maximized");
+    erase("", "main_frame_pos");
+    erase("", "main_frame_size");
+    erase("", "object_settings_maximized");
+    erase("", "object_settings_pos");
+    erase("", "object_settings_size");
+}
+
+void AppConfig::load()
+{
+    // 1) Read the complete config file into a boost::property_tree.
+    namespace pt = boost::property_tree;
+    pt::ptree tree;
+    boost::nowide::ifstream ifs(AppConfig::config_path());
+    pt::read_ini(ifs, tree);
+
+    // 2) Parse the property_tree, extract the sections and key / value pairs.
+    for (const auto &section : tree) {
+    	if (section.second.empty()) {
+    		// This may be a top level (no section) entry, or an empty section.
+    		std::string data = section.second.data();
+    		if (! data.empty())
+    			// If there is a non-empty data, then it must be a top-level (without a section) config entry.
+    			m_storage[""][section.first] = data;
+    	} else if (boost::starts_with(section.first, VENDOR_PREFIX)) {
+            // This is a vendor section listing enabled model / variants
+            const auto vendor_name = section.first.substr(VENDOR_PREFIX.size());
+            auto &vendor = m_vendors[vendor_name];
+            for (const auto &kvp : section.second) {
+                if (! boost::starts_with(kvp.first, MODEL_PREFIX)) { continue; }
+                const auto model_name = kvp.first.substr(MODEL_PREFIX.size());
+                std::vector<std::string> variants;
+                if (! unescape_strings_cstyle(kvp.second.data(), variants)) { continue; }
+                for (const auto &variant : variants) {
+                    vendor[model_name].insert(variant);
+                }
+            }
+    	} else {
+    		// This must be a section name. Read the entries of a section.
+    		std::map<std::string, std::string> &storage = m_storage[section.first];
+            for (auto &kvp : section.second)
+            	storage[kvp.first] = kvp.second.data();
+        }
+    }
+
+    // Figure out if datadir has legacy presets
+    auto ini_ver = Semver::parse(get("version"));
+    m_legacy_datadir = false;
+    if (ini_ver) {
+        m_orig_version = *ini_ver;
+        // Make 1.40.0 alphas compare well
+        ini_ver->set_metadata(boost::none);
+        ini_ver->set_prerelease(boost::none);
+        m_legacy_datadir = ini_ver < Semver(1, 40, 0);
+    }
+
+    // Override missing or keys with their defaults.
+    this->set_defaults();
+    m_dirty = false;
+}
+
+void AppConfig::save()
+{
+    boost::nowide::ofstream c;
+    c.open(AppConfig::config_path(), std::ios::out | std::ios::trunc);
+    c << "# " << Slic3r::header_slic3r_generated() << std::endl;
+    // Make sure the "no" category is written first.
+    for (const std::pair<std::string, std::string> &kvp : m_storage[""])
+        c << kvp.first << " = " << kvp.second << std::endl;
+    // Write the other categories.
+    for (const auto category : m_storage) {
+    	if (category.first.empty())
+    		continue;
+    	c << std::endl << "[" << category.first << "]" << std::endl;
+    	for (const std::pair<std::string, std::string> &kvp : category.second)
+	        c << kvp.first << " = " << kvp.second << std::endl;
+	}
+    // Write vendor sections
+    for (const auto &vendor : m_vendors) {
+        size_t size_sum = 0;
+        for (const auto &model : vendor.second) { size_sum += model.second.size(); }
+        if (size_sum == 0) { continue; }
+
+        c << std::endl << "[" << VENDOR_PREFIX << vendor.first << "]" << std::endl;
+
+        for (const auto &model : vendor.second) {
+            if (model.second.size() == 0) { continue; }
+            const std::vector<std::string> variants(model.second.begin(), model.second.end());
+            const auto escaped = escape_strings_cstyle(variants);
+            c << MODEL_PREFIX << model.first << " = " << escaped << std::endl;
+        }
+    }
+    c.close();
+    m_dirty = false;
+}
+
+bool AppConfig::get_variant(const std::string &vendor, const std::string &model, const std::string &variant) const
+{
+    const auto it_v = m_vendors.find(vendor);
+    if (it_v == m_vendors.end()) { return false; }
+    const auto it_m = it_v->second.find(model);
+    return it_m == it_v->second.end() ? false : it_m->second.find(variant) != it_m->second.end();
+}
+
+void AppConfig::set_variant(const std::string &vendor, const std::string &model, const std::string &variant, bool enable)
+{
+    if (enable) {
+        if (get_variant(vendor, model, variant)) { return; }
+        m_vendors[vendor][model].insert(variant);
+    } else {
+        auto it_v = m_vendors.find(vendor);
+        if (it_v == m_vendors.end()) { return; }
+        auto it_m = it_v->second.find(model);
+        if (it_m == it_v->second.end()) { return; }
+        auto it_var = it_m->second.find(variant);
+        if (it_var == it_m->second.end()) { return; }
+        it_m->second.erase(it_var);
+    }
+    // If we got here, there was an update
+    m_dirty = true;
+}
+
+void AppConfig::set_vendors(const AppConfig &from)
+{
+    m_vendors = from.m_vendors;
+    m_dirty = true;
+}
+
+std::string AppConfig::get_last_dir() const
+{
+    const auto it = m_storage.find("recent");
+    if (it != m_storage.end()) {
+        {
+            const auto it2 = it->second.find("skein_directory");
+            if (it2 != it->second.end() && ! it2->second.empty())
+                return it2->second;
+        }
+        {
+            const auto it2 = it->second.find("config_directory");
+            if (it2 != it->second.end() && ! it2->second.empty())
+                return it2->second;
+        }
+    }
+    return std::string();
+}
+
+void AppConfig::update_config_dir(const std::string &dir)
+{
+    this->set("recent", "config_directory", dir);
+}
+
+void AppConfig::update_skein_dir(const std::string &dir)
+{
+    this->set("recent", "skein_directory", dir);
+}
+
+std::string AppConfig::get_last_output_dir(const std::string &alt) const
+{
+    const auto it = m_storage.find("");
+    if (it != m_storage.end()) {
+        const auto it2 = it->second.find("last_output_path");
+        const auto it3 = it->second.find("remember_output_path");
+        if (it2 != it->second.end() && it3 != it->second.end() && ! it2->second.empty() && it3->second == "1")
+            return it2->second;
+    }
+    return alt;
+}
+
+void AppConfig::update_last_output_dir(const std::string &dir)
+{
+    this->set("", "last_output_path", dir);
+}
+
+void AppConfig::reset_selections()
+{
+    auto it = m_storage.find("presets");
+    if (it != m_storage.end()) {
+        it->second.erase("print");
+        it->second.erase("filament");
+        it->second.erase("sla_material");
+        it->second.erase("printer");
+        m_dirty = true;
+    }
+}
+
+std::string AppConfig::config_path()
+{
+	return (boost::filesystem::path(Slic3r::data_dir()) / "slic3r.ini").make_preferred().string();
+}
+
+std::string AppConfig::version_check_url() const
+{
+    auto from_settings = get("version_check_url");
+    return from_settings.empty() ? VERSION_CHECK_URL : from_settings;
+}
+
+bool AppConfig::exists()
+{
+    return boost::filesystem::exists(AppConfig::config_path());
+}
+
+}; // namespace Slic3r

src/slic3r/GUI/AppConfig.hpp

@@ -0,0 +1,140 @@
+#ifndef slic3r_AppConfig_hpp_
+#define slic3r_AppConfig_hpp_
+
+#include <set>
+#include <map>
+#include <string>
+
+#include "libslic3r/Config.hpp"
+#include "slic3r/Utils/Semver.hpp"
+
+namespace Slic3r {
+
+class AppConfig
+{
+public:
+	AppConfig() :
+		m_dirty(false),
+		m_orig_version(Semver::invalid()),
+		m_legacy_datadir(false)
+	{
+		this->reset();
+	}
+
+	// Clear and reset to defaults.
+	void 			   	reset();
+	// Override missing or keys with their defaults.
+	void 			   	set_defaults();
+
+	// Load the slic3r.ini from a user profile directory (or a datadir, if configured).
+	void 			   	load();
+	// Store the slic3r.ini into a user profile directory (or a datadir, if configured).
+	void 			   	save();
+
+	// Does this config need to be saved?
+	bool 				dirty() const { return m_dirty; }
+
+	// Const accessor, it will return false if a section or a key does not exist.
+	bool get(const std::string &section, const std::string &key, std::string &value) const
+	{
+		value.clear();
+		auto it = m_storage.find(section);
+		if (it == m_storage.end())
+			return false;
+		auto it2 = it->second.find(key);
+		if (it2 == it->second.end()) 
+			return false;
+		value = it2->second;
+		return true;
+	}
+	std::string 		get(const std::string &section, const std::string &key) const
+		{ std::string value; this->get(section, key, value); return value; }
+	std::string 		get(const std::string &key) const
+		{ std::string value; this->get("", key, value); return value; }
+	void			    set(const std::string &section, const std::string &key, const std::string &value)
+	{ 
+		std::string &old = m_storage[section][key];
+		if (old != value) {
+			old = value;
+			m_dirty = true;
+		}
+	}
+	void			    set(const std::string &key, const std::string &value)
+		{ this->set("", key, value);  }
+	bool				has(const std::string &section, const std::string &key) const
+	{
+		auto it = m_storage.find(section);
+		if (it == m_storage.end())
+			return false;
+		auto it2 = it->second.find(key);
+		return it2 != it->second.end() && ! it2->second.empty();
+	}
+	bool				has(const std::string &key) const
+		{ return this->has("", key); }
+
+	void				erase(const std::string &section, const std::string &key)
+	{
+		auto it = m_storage.find(section);
+		if (it != m_storage.end()) {
+			it->second.erase(key);
+		}
+	}
+
+	void 				clear_section(const std::string &section)
+		{ m_storage[section].clear(); }
+
+	typedef std::map<std::string, std::map<std::string, std::set<std::string>>> VendorMap;
+	bool                get_variant(const std::string &vendor, const std::string &model, const std::string &variant) const;
+	void                set_variant(const std::string &vendor, const std::string &model, const std::string &variant, bool enable);
+	void                set_vendors(const AppConfig &from);
+	void 				set_vendors(const VendorMap &vendors) { m_vendors = vendors; m_dirty = true; }
+	void 				set_vendors(VendorMap &&vendors) { m_vendors = std::move(vendors); m_dirty = true; }
+	const VendorMap&    vendors() const { return m_vendors; }
+
+	// return recent/skein_directory or recent/config_directory or empty string.
+	std::string 		get_last_dir() const;
+	void 				update_config_dir(const std::string &dir);
+	void 				update_skein_dir(const std::string &dir);
+
+	std::string 		get_last_output_dir(const std::string &alt) const;
+	void                update_last_output_dir(const std::string &dir);
+
+	// reset the current print / filament / printer selections, so that 
+	// the  PresetBundle::load_selections(const AppConfig &config) call will select
+	// the first non-default preset when called.
+    void                reset_selections();
+
+	// Get the default config path from Slic3r::data_dir().
+	static std::string  config_path();
+
+	// Returns true if the user's data directory comes from before Slic3r 1.40.0 (no updating)
+	bool legacy_datadir() const { return m_legacy_datadir; }
+	void set_legacy_datadir(bool value) { m_legacy_datadir = value; }
+
+	// Get the Slic3r version check url.
+	// This returns a hardcoded string unless it is overriden by "version_check_url" in the ini file.
+	std::string version_check_url() const;
+
+	// Returns the original Slic3r version found in the ini file before it was overwritten
+	// by the current version
+	Semver orig_version() const { return m_orig_version; }
+
+	// Does the config file exist?
+	static bool 		exists();
+
+private:
+	// Map of section, name -> value
+	std::map<std::string, std::map<std::string, std::string>> 	m_storage;
+	// Map of enabled vendors / models / variants
+	VendorMap                                                   m_vendors;
+	// Has any value been modified since the config.ini has been last saved or loaded?
+	bool														m_dirty;
+	// Original version found in the ini file before it was overwritten
+	Semver                                                      m_orig_version;
+	// Whether the existing version is before system profiles & configuration updating
+	bool                                                        m_legacy_datadir;
+};
+
+}; // namespace Slic3r
+
+#endif /* slic3r_AppConfig_hpp_ */

src/slic3r/GUI/BackgroundSlicingProcess.cpp

@@ -0,0 +1,167 @@
+#include "BackgroundSlicingProcess.hpp"
+#include "GUI.hpp"
+
+#include <wx/event.h>
+#include <wx/panel.h>
+#include <wx/stdpaths.h>
+
+// Print now includes tbb, and tbb includes Windows. This breaks compilation of wxWidgets if included before wx.
+#include "../../libslic3r/Print.hpp"
+#include "../../libslic3r/Utils.hpp"
+#include "../../libslic3r/GCode/PostProcessor.hpp"
+
+//#undef NDEBUG
+#include <cassert>
+#include <stdexcept>
+
+#include <boost/format.hpp>
+#include <boost/nowide/cstdio.hpp>
+
+namespace Slic3r {
+
+namespace GUI {
+	extern wxPanel *g_wxPlater;
+};
+
+BackgroundSlicingProcess::BackgroundSlicingProcess()
+{
+	m_temp_output_path = wxStandardPaths::Get().GetTempDir().utf8_str().data();
+	m_temp_output_path += (boost::format(".%1%.gcode") % get_current_pid()).str();
+}
+
+BackgroundSlicingProcess::~BackgroundSlicingProcess() 
+{ 
+	this->stop();
+	this->join_background_thread();
+	boost::nowide::remove(m_temp_output_path.c_str());
+}
+
+void BackgroundSlicingProcess::thread_proc()
+{
+	std::unique_lock<std::mutex> lck(m_mutex);
+	// Let the caller know we are ready to run the background processing task.
+	m_state = STATE_IDLE;
+	lck.unlock();
+	m_condition.notify_one();
+	for (;;) {
+		assert(m_state == STATE_IDLE || m_state == STATE_CANCELED || m_state == STATE_FINISHED);
+		// Wait until a new task is ready to be executed, or this thread should be finished.
+		lck.lock();
+		m_condition.wait(lck, [this](){ return m_state == STATE_STARTED || m_state == STATE_EXIT; });
+		if (m_state == STATE_EXIT)
+			// Exiting this thread.
+			break;
+		// Process the background slicing task.
+		m_state = STATE_RUNNING;
+		lck.unlock();
+		std::string error;
+		try {
+			assert(m_print != nullptr);
+		    m_print->process();
+		    if (! m_print->canceled()) {
+				wxQueueEvent(GUI::g_wxPlater, new wxCommandEvent(m_event_sliced_id));
+			    m_print->export_gcode(m_temp_output_path, m_gcode_preview_data);
+			    if (! m_print->canceled() && ! m_output_path.empty()) {
+			    	if (copy_file(m_temp_output_path, m_output_path) != 0)
+		    			throw std::runtime_error("Copying of the temporary G-code to the output G-code failed");
+		    		m_print->set_status(95, "Running post-processing scripts");
+		    		run_post_process_scripts(m_output_path, m_print->config());
+		    	}
+		    }
+		} catch (CanceledException &ex) {
+			// Canceled, this is all right.
+			assert(m_print->canceled());
+		} catch (std::exception &ex) {
+			error = ex.what();
+		} catch (...) {
+			error = "Unknown C++ exception.";
+		}
+		lck.lock();
+		m_state = m_print->canceled() ? STATE_CANCELED : STATE_FINISHED;
+		wxCommandEvent evt(m_event_finished_id);
+		evt.SetString(error);
+		evt.SetInt(m_print->canceled() ? -1 : (error.empty() ? 1 : 0));
+	    wxQueueEvent(GUI::g_wxPlater, evt.Clone());
+	    m_print->restart();
+		lck.unlock();
+		// Let the UI thread wake up if it is waiting for the background task to finish.
+	    m_condition.notify_one();
+	    // Let the UI thread see the result.
+	}
+	m_state = STATE_EXITED;
+	lck.unlock();
+	// End of the background processing thread. The UI thread should join m_thread now.
+}
+
+void BackgroundSlicingProcess::join_background_thread()
+{
+	std::unique_lock<std::mutex> lck(m_mutex);
+	if (m_state == STATE_INITIAL) {
+		// Worker thread has not been started yet.
+		assert(! m_thread.joinable());
+	} else {
+		assert(m_state == STATE_IDLE);
+		assert(m_thread.joinable());
+		// Notify the worker thread to exit.
+		m_state = STATE_EXIT;
+		lck.unlock();
+		m_condition.notify_one();
+		// Wait until the worker thread exits.
+		m_thread.join();
+	}
+}
+
+bool BackgroundSlicingProcess::start()
+{
+	std::unique_lock<std::mutex> lck(m_mutex);
+	if (m_state == STATE_INITIAL) {
+		// The worker thread is not running yet. Start it.
+		assert(! m_thread.joinable());
+		m_thread = std::thread([this]{this->thread_proc();});
+		// Wait until the worker thread is ready to execute the background processing task.
+		m_condition.wait(lck, [this](){ return m_state == STATE_IDLE; });
+	}
+	assert(m_state == STATE_IDLE || this->running());
+	if (this->running())
+		// The background processing thread is already running.
+		return false;
+	if (! this->idle())
+		throw std::runtime_error("Cannot start a background task, the worker thread is not idle.");
+	m_state = STATE_STARTED;
+	lck.unlock();
+	m_condition.notify_one();
+	return true;
+}
+
+bool BackgroundSlicingProcess::stop()
+{
+	std::unique_lock<std::mutex> lck(m_mutex);
+	if (m_state == STATE_INITIAL) {
+		this->m_output_path.clear();
+		return false;
+	}
+	assert(this->running());
+	if (m_state == STATE_STARTED || m_state == STATE_RUNNING) {
+		m_print->cancel();
+		// Wait until the background processing stops by being canceled.
+		m_condition.wait(lck, [this](){ return m_state == STATE_CANCELED; });
+		// In the "Canceled" state. Reset the state to "Idle".
+		m_state = STATE_IDLE;
+	} else if (m_state == STATE_FINISHED || m_state == STATE_CANCELED) {
+		// In the "Finished" or "Canceled" state. Reset the state to "Idle".
+		m_state = STATE_IDLE;
+	}
+	this->m_output_path.clear();
+	return true;
+}
+
+// Apply config over the print. Returns false, if the new config values caused any of the already
+// processed steps to be invalidated, therefore the task will need to be restarted.
+bool BackgroundSlicingProcess::apply_config(const DynamicPrintConfig &config)
+{
+	this->stop();
+	bool invalidated = m_print->apply_config(config);
+	return invalidated;
+}
+
+}; // namespace Slic3r

src/slic3r/GUI/BackgroundSlicingProcess.hpp

@@ -0,0 +1,91 @@
+#ifndef slic3r_GUI_BackgroundSlicingProcess_hpp_
+#define slic3r_GUI_BackgroundSlicingProcess_hpp_
+
+#include <string>
+#include <condition_variable>
+#include <mutex>
+#include <thread>
+
+namespace Slic3r {
+
+class DynamicPrintConfig;
+class GCodePreviewData;
+class Print;
+
+// Support for the GUI background processing (Slicing and G-code generation).
+// As of now this class is not declared in Slic3r::GUI due to the Perl bindings limits.
+class BackgroundSlicingProcess
+{
+public:
+	BackgroundSlicingProcess();
+	// Stop the background processing and finalize the bacgkround processing thread, remove temp files.
+	~BackgroundSlicingProcess();
+
+	void set_print(Print *print) { m_print = print; }
+	void set_gcode_preview_data(GCodePreviewData *gpd) { m_gcode_preview_data = gpd; }
+	// The following wxCommandEvent will be sent to the UI thread / Platter window, when the slicing is finished
+	// and the background processing will transition into G-code export.
+	// The wxCommandEvent is sent to the UI thread asynchronously without waiting for the event to be processed.
+	void set_sliced_event(int event_id) { m_event_sliced_id = event_id; }
+	// The following wxCommandEvent will be sent to the UI thread / Platter window, when the G-code export is finished.
+	// The wxCommandEvent is sent to the UI thread asynchronously without waiting for the event to be processed.
+	void set_finished_event(int event_id) { m_event_finished_id = event_id; }
+
+	// Set the output path of the G-code.
+	void set_output_path(const std::string &path) { m_output_path = path; }
+	// Start the background processing. Returns false if the background processing was already running.
+	bool start();
+	// Cancel the background processing. Returns false if the background processing was not running.
+	// A stopped background processing may be restarted with start().
+	bool stop();
+
+	// Apply config over the print. Returns false, if the new config values caused any of the already
+	// processed steps to be invalidated, therefore the task will need to be restarted.
+	bool apply_config(const DynamicPrintConfig &config);
+
+	enum State {
+		// m_thread  is not running yet, or it did not reach the STATE_IDLE yet (it does not wait on the condition yet).
+		STATE_INITIAL = 0,
+		// m_thread is waiting for the task to execute.
+		STATE_IDLE,
+		STATE_STARTED,
+		// m_thread is executing a task.
+		STATE_RUNNING,
+		// m_thread finished executing a task, and it is waiting until the UI thread picks up the results.
+		STATE_FINISHED,
+		// m_thread finished executing a task, the task has been canceled by the UI thread, therefore the UI thread will not be notified.
+		STATE_CANCELED,
+		// m_thread exited the loop and it is going to finish. The UI thread should join on m_thread.
+		STATE_EXIT,
+		STATE_EXITED,
+	};
+	State 	state() 	const { return m_state; }
+	bool    idle() 		const { return m_state == STATE_IDLE; }
+	bool    running() 	const { return m_state == STATE_STARTED || m_state == STATE_RUNNING || m_state == STATE_FINISHED || m_state == STATE_CANCELED; }
+
+private:
+	void 	thread_proc();
+	void 	join_background_thread();
+
+	Print 					   *m_print 			 = nullptr;
+	// Data structure, to which the G-code export writes its annotations.
+	GCodePreviewData 		   *m_gcode_preview_data = nullptr;
+	std::string 				m_temp_output_path;
+	std::string 				m_output_path;
+	// Thread, on which the background processing is executed. The thread will always be present
+	// and ready to execute the slicing process.
+	std::thread		 			m_thread;
+	// Mutex and condition variable to synchronize m_thread with the UI thread.
+	std::mutex 		 			m_mutex;
+	std::condition_variable		m_condition;
+	State 						m_state = STATE_INITIAL;
+
+	// wxWidgets command ID to be sent to the platter to inform that the slicing is finished, and the G-code export will continue.
+	int 						m_event_sliced_id 	 = 0;
+	// wxWidgets command ID to be sent to the platter to inform that the task finished.
+	int 						m_event_finished_id  = 0;
+};
+
+}; // namespace Slic3r
+
+#endif /* slic3r_GUI_BackgroundSlicingProcess_hpp_ */

src/slic3r/GUI/BedShapeDialog.cpp

@@ -0,0 +1,343 @@
+#include "BedShapeDialog.hpp"
+
+#include <wx/sizer.h>
+#include <wx/statbox.h>
+#include <wx/wx.h> 
+#include "Polygon.hpp"
+#include "BoundingBox.hpp"
+#include <wx/numformatter.h>
+#include "Model.hpp"
+#include "boost/nowide/iostream.hpp"
+
+#include <algorithm>
+
+namespace Slic3r {
+namespace GUI {
+
+void BedShapeDialog::build_dialog(ConfigOptionPoints* default_pt)
+{
+	m_panel = new BedShapePanel(this);
+	m_panel->build_panel(default_pt);
+
+	auto main_sizer = new wxBoxSizer(wxVERTICAL);
+	main_sizer->Add(m_panel, 1, wxEXPAND);
+	main_sizer->Add(CreateButtonSizer(wxOK | wxCANCEL), 0, wxALIGN_CENTER_HORIZONTAL | wxBOTTOM, 10);
+
+	SetSizer(main_sizer);
+	SetMinSize(GetSize());
+	main_sizer->SetSizeHints(this);
+
+	// needed to actually free memory
+	this->Bind(wxEVT_CLOSE_WINDOW, ([this](wxCloseEvent e){
+		EndModal(wxID_OK);
+		Destroy();
+	}));
+}
+
+void BedShapePanel::build_panel(ConfigOptionPoints* default_pt)
+{
+//  on_change(nullptr);
+
+	auto box = new wxStaticBox(this, wxID_ANY, _(L("Shape")));
+	auto sbsizer = new wxStaticBoxSizer(box, wxVERTICAL);
+
+	// shape options
+	m_shape_options_book = new wxChoicebook(this, wxID_ANY, wxDefaultPosition, wxSize(300, -1), wxCHB_TOP);
+	sbsizer->Add(m_shape_options_book);
+
+	auto optgroup = init_shape_options_page(_(L("Rectangular")));
+		ConfigOptionDef def;
+		def.type = coPoints;
+		def.default_value = new ConfigOptionPoints{ Vec2d(200, 200) };
+		def.label = L("Size");
+		def.tooltip = L("Size in X and Y of the rectangular plate.");
+		Option option(def, "rect_size");
+		optgroup->append_single_option_line(option);
+
+		def.type = coPoints;
+		def.default_value = new ConfigOptionPoints{ Vec2d(0, 0) };
+		def.label = L("Origin");
+		def.tooltip = L("Distance of the 0,0 G-code coordinate from the front left corner of the rectangle.");
+		option = Option(def, "rect_origin");
+		optgroup->append_single_option_line(option);
+
+		optgroup = init_shape_options_page(_(L("Circular")));
+		def.type = coFloat;
+		def.default_value = new ConfigOptionFloat(200);
+		def.sidetext = L("mm");
+		def.label = L("Diameter");
+		def.tooltip = L("Diameter of the print bed. It is assumed that origin (0,0) is located in the center.");
+		option = Option(def, "diameter");
+		optgroup->append_single_option_line(option);
+
+		optgroup = init_shape_options_page(_(L("Custom")));
+		Line line{ "", "" };
+		line.full_width = 1;
+		line.widget = [this](wxWindow* parent) {
+			auto btn = new wxButton(parent, wxID_ANY, _(L("Load shape from STL...")), wxDefaultPosition, wxDefaultSize);
+			
+			auto sizer = new wxBoxSizer(wxHORIZONTAL);
+			sizer->Add(btn);
+
+			btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent e)
+			{
+				load_stl();
+			}));
+
+			return sizer;
+		};
+		optgroup->append_line(line);
+
+	Bind(wxEVT_CHOICEBOOK_PAGE_CHANGED, ([this](wxCommandEvent e)
+	{
+		update_shape();
+	}));
+
+	// right pane with preview canvas
+	m_canvas = new Bed_2D(this);
+	m_canvas->m_bed_shape = default_pt->values;
+
+	// main sizer
+	auto top_sizer = new wxBoxSizer(wxHORIZONTAL);
+	top_sizer->Add(sbsizer, 0, wxEXPAND | wxLeft | wxTOP | wxBOTTOM, 10);
+	if (m_canvas)
+		top_sizer->Add(m_canvas, 1, wxEXPAND | wxALL, 10) ;
+
+	SetSizerAndFit(top_sizer);
+
+	set_shape(default_pt);
+	update_preview();
+}
+
+#define SHAPE_RECTANGULAR	0
+#define SHAPE_CIRCULAR		1
+#define SHAPE_CUSTOM		2
+
+// Called from the constructor.
+// Create a panel for a rectangular / circular / custom bed shape.
+ConfigOptionsGroupShp BedShapePanel::init_shape_options_page(wxString title){
+
+	auto panel = new wxPanel(m_shape_options_book);
+	ConfigOptionsGroupShp optgroup;
+	optgroup = std::make_shared<ConfigOptionsGroup>(panel, _(L("Settings")));
+
+	optgroup->label_width = 100;
+	optgroup->m_on_change = [this](t_config_option_key opt_key, boost::any value){
+		update_shape();
+	};
+		
+	m_optgroups.push_back(optgroup);
+	panel->SetSizerAndFit(optgroup->sizer);
+	m_shape_options_book->AddPage(panel, title);
+
+	return optgroup;
+}
+
+// Called from the constructor.
+// Set the initial bed shape from a list of points.
+// Deduce the bed shape type(rect, circle, custom)
+// This routine shall be smart enough if the user messes up
+// with the list of points in the ini file directly.
+void BedShapePanel::set_shape(ConfigOptionPoints* points)
+{
+	auto polygon = Polygon::new_scale(points->values);
+
+	// is this a rectangle ?
+	if (points->size() == 4) {
+		auto lines = polygon.lines();
+		if (lines[0].parallel_to(lines[2]) && lines[1].parallel_to(lines[3])) {
+			// okay, it's a rectangle
+			// find origin
+            coordf_t x_min, x_max, y_min, y_max;
+            x_max = x_min = points->values[0](0);
+			y_max = y_min = points->values[0](1);
+			for (auto pt : points->values)
+            {
+                x_min = std::min(x_min, pt(0));
+                x_max = std::max(x_max, pt(0));
+                y_min = std::min(y_min, pt(1));
+                y_max = std::max(y_max, pt(1));
+            }
+
+            auto origin = new ConfigOptionPoints{ Vec2d(-x_min, -y_min) };
+
+			m_shape_options_book->SetSelection(SHAPE_RECTANGULAR);
+			auto optgroup = m_optgroups[SHAPE_RECTANGULAR];
+			optgroup->set_value("rect_size", new ConfigOptionPoints{ Vec2d(x_max - x_min, y_max - y_min) });//[x_max - x_min, y_max - y_min]);
+			optgroup->set_value("rect_origin", origin);
+			update_shape();
+			return;
+		}
+	}
+
+	// is this a circle ?
+	{
+		// Analyze the array of points.Do they reside on a circle ?
+		auto center = polygon.bounding_box().center();
+		std::vector<double> vertex_distances;
+		double avg_dist = 0;
+		for (auto pt: polygon.points)
+		{
+			double distance = (pt - center).cast<double>().norm();
+			vertex_distances.push_back(distance);
+			avg_dist += distance;
+		}
+
+		avg_dist /= vertex_distances.size();
+		bool defined_value = true;
+		for (auto el: vertex_distances)
+		{
+			if (abs(el - avg_dist) > 10 * SCALED_EPSILON)
+				defined_value = false;
+			break;
+		}
+		if (defined_value) {
+			// all vertices are equidistant to center
+			m_shape_options_book->SetSelection(SHAPE_CIRCULAR);
+			auto optgroup = m_optgroups[SHAPE_CIRCULAR];
+			boost::any ret = wxNumberFormatter::ToString(unscale<double>(avg_dist * 2), 0);
+ 			optgroup->set_value("diameter", ret);
+			update_shape();
+			return;
+		}
+	}
+
+	if (points->size() < 3) {
+		// Invalid polygon.Revert to default bed dimensions.
+		m_shape_options_book->SetSelection(SHAPE_RECTANGULAR);
+		auto optgroup = m_optgroups[SHAPE_RECTANGULAR];
+		optgroup->set_value("rect_size", new ConfigOptionPoints{ Vec2d(200, 200) });
+		optgroup->set_value("rect_origin", new ConfigOptionPoints{ Vec2d(0, 0) });
+		update_shape();
+		return;
+	}
+
+	// This is a custom bed shape, use the polygon provided.
+	m_shape_options_book->SetSelection(SHAPE_CUSTOM);
+	// Copy the polygon to the canvas, make a copy of the array.
+	m_canvas->m_bed_shape = points->values;
+	update_shape();
+}
+
+void BedShapePanel::update_preview()
+{
+	if (m_canvas) m_canvas->Refresh();
+	Refresh();
+}
+
+// Update the bed shape from the dialog fields.
+void BedShapePanel::update_shape()
+{
+	auto page_idx = m_shape_options_book->GetSelection();
+	if (page_idx == SHAPE_RECTANGULAR) {
+		Vec2d rect_size(Vec2d::Zero());
+		Vec2d rect_origin(Vec2d::Zero());
+		try{
+			rect_size = boost::any_cast<Vec2d>(m_optgroups[SHAPE_RECTANGULAR]->get_value("rect_size")); }
+		catch (const std::exception &e){
+			return;
+		}
+		try{
+			rect_origin = boost::any_cast<Vec2d>(m_optgroups[SHAPE_RECTANGULAR]->get_value("rect_origin"));
+		}
+		catch (const std::exception &e){
+			return;}
+		
+		auto x = rect_size(0);
+		auto y = rect_size(1);
+		// empty strings or '-' or other things
+		if (x == 0 || y == 0)	return;
+		double x0 = 0.0;
+		double y0 = 0.0;
+		double x1 = x;
+		double y1 = y;
+
+		auto dx = rect_origin(0);
+		auto dy = rect_origin(1);
+
+		x0 -= dx;
+		x1 -= dx;
+		y0 -= dy;
+		y1 -= dy;
+		m_canvas->m_bed_shape = {	Vec2d(x0, y0),
+									Vec2d(x1, y0),
+									Vec2d(x1, y1),
+									Vec2d(x0, y1)};
+	} 
+	else if(page_idx == SHAPE_CIRCULAR) {
+		double diameter;
+		try{
+			diameter = boost::any_cast<double>(m_optgroups[SHAPE_CIRCULAR]->get_value("diameter"));
+		}
+		catch (const std::exception &e){
+			return;
+		} 
+ 		if (diameter == 0.0) return ;
+		auto r = diameter / 2;
+		auto twopi = 2 * PI;
+		auto edges = 60;
+		std::vector<Vec2d> points;
+		for (size_t i = 1; i <= 60; ++i){
+			auto angle = i * twopi / edges;
+			points.push_back(Vec2d(r*cos(angle), r*sin(angle)));
+		}
+		m_canvas->m_bed_shape = points;
+	}
+
+//	$self->{on_change}->();
+	update_preview();
+}
+
+// Loads an stl file, projects it to the XY plane and calculates a polygon.
+void BedShapePanel::load_stl()
+{
+	t_file_wild_card vec_FILE_WILDCARDS = get_file_wild_card();
+    std::vector<std::string> file_types = { "known", "stl", "obj", "amf", "3mf", "prusa" };
+    wxString MODEL_WILDCARD;
+	for (auto file_type: file_types)
+		MODEL_WILDCARD += vec_FILE_WILDCARDS.at(file_type) + "|";
+
+	auto dialog = new wxFileDialog(this, _(L("Choose a file to import bed shape from (STL/OBJ/AMF/3MF/PRUSA):")), "", "",
+		MODEL_WILDCARD, wxFD_OPEN | wxFD_FILE_MUST_EXIST);
+	if (dialog->ShowModal() != wxID_OK) {
+		dialog->Destroy();
+		return;
+	}
+	wxArrayString input_file;
+	dialog->GetPaths(input_file);
+	dialog->Destroy();
+
+	std::string file_name = input_file[0].ToStdString();
+
+	Model model;
+	try {
+		model = Model::read_from_file(file_name);
+	}
+	catch (std::exception &e) {
+		auto msg = _(L("Error! ")) + file_name + " : " + e.what() + ".";
+		show_error(this, msg);
+		exit(1);
+	}
+
+	auto mesh = model.mesh();
+	auto expolygons = mesh.horizontal_projection();
+
+	if (expolygons.size() == 0) {
+		show_error(this, _(L("The selected file contains no geometry.")));
+		return;
+	}
+	if (expolygons.size() > 1) {
+		show_error(this, _(L("The selected file contains several disjoint areas. This is not supported.")));
+		return;
+	}
+
+	auto polygon = expolygons[0].contour;
+	std::vector<Vec2d> points;
+	for (auto pt : polygon.points)
+		points.push_back(unscale(pt));
+	m_canvas->m_bed_shape = points;
+	update_preview();
+}
+
+} // GUI
+} // Slic3r

src/slic3r/GUI/BedShapeDialog.hpp

@@ -0,0 +1,56 @@
+#ifndef slic3r_BedShapeDialog_hpp_
+#define slic3r_BedShapeDialog_hpp_
+// The bed shape dialog.
+// The dialog opens from Print Settins tab->Bed Shape : Set...
+
+#include "OptionsGroup.hpp"
+#include "2DBed.hpp"
+
+
+#include <wx/dialog.h>
+#include <wx/choicebk.h>
+
+namespace Slic3r {
+namespace GUI {
+
+using ConfigOptionsGroupShp = std::shared_ptr<ConfigOptionsGroup>;
+class BedShapePanel : public wxPanel
+{
+	wxChoicebook*	m_shape_options_book;
+	Bed_2D*			m_canvas;
+
+	std::vector <ConfigOptionsGroupShp>	m_optgroups;
+
+public:
+	BedShapePanel(wxWindow* parent) : wxPanel(parent, wxID_ANY){}
+	~BedShapePanel(){}
+
+	void		build_panel(ConfigOptionPoints* default_pt);
+	
+	ConfigOptionsGroupShp	init_shape_options_page(wxString title);
+	void		set_shape(ConfigOptionPoints* points);
+	void		update_preview();
+	void		update_shape();
+	void		load_stl();
+	
+	// Returns the resulting bed shape polygon. This value will be stored to the ini file.
+	std::vector<Vec2d>	GetValue() { return m_canvas->m_bed_shape; }
+};
+
+class BedShapeDialog : public wxDialog
+{
+	BedShapePanel*	m_panel;
+public:
+	BedShapeDialog(wxWindow* parent) : wxDialog(parent, wxID_ANY, _(L("Bed Shape")),
+		wxDefaultPosition, wxSize(350, 700), wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER){}
+	~BedShapeDialog(){  }
+
+	void		build_dialog(ConfigOptionPoints* default_pt);
+	std::vector<Vec2d>	GetValue() { return m_panel->GetValue(); }
+};
+
+} // GUI
+} // Slic3r
+
+
+#endif  /* slic3r_BedShapeDialog_hpp_ */

src/slic3r/GUI/BitmapCache.cpp

@@ -0,0 +1,172 @@
+#include "BitmapCache.hpp"
+
+#if ! defined(WIN32) && ! defined(__APPLE__)
+#define BROKEN_ALPHA
+#endif
+
+#ifdef BROKEN_ALPHA
+    #include <wx/mstream.h>
+    #include <wx/rawbmp.h>
+#endif /* BROKEN_ALPHA */
+
+namespace Slic3r { namespace GUI {
+
+void BitmapCache::clear()
+{
+    for (std::pair<const std::string, wxBitmap*> &bitmap : m_map)
+        delete bitmap.second;
+}
+
+static wxBitmap wxImage_to_wxBitmap_with_alpha(wxImage &&image)
+{
+#ifdef BROKEN_ALPHA
+    wxMemoryOutputStream stream;
+    image.SaveFile(stream, wxBITMAP_TYPE_PNG);
+    wxStreamBuffer *buf = stream.GetOutputStreamBuffer();
+    return wxBitmap::NewFromPNGData(buf->GetBufferStart(), buf->GetBufferSize());
+#else
+    return wxBitmap(std::move(image));
+#endif
+}
+
+wxBitmap* BitmapCache::insert(const std::string &bitmap_key, size_t width, size_t height)
+{
+    wxBitmap *bitmap = nullptr;
+    auto      it     = m_map.find(bitmap_key);
+    if (it == m_map.end()) {
+        bitmap = new wxBitmap(width, height);
+        m_map[bitmap_key] = bitmap;
+    } else {
+        bitmap = it->second;
+        if (bitmap->GetWidth() != width || bitmap->GetHeight() != height)
+            bitmap->Create(width, height);
+    }
+#ifndef BROKEN_ALPHA
+    bitmap->UseAlpha();
+#endif
+    return bitmap;
+}
+
+wxBitmap* BitmapCache::insert(const std::string &bitmap_key, const wxBitmap &bmp)
+{
+    wxBitmap *bitmap = nullptr;
+    auto      it     = m_map.find(bitmap_key);
+    if (it == m_map.end()) {
+        bitmap = new wxBitmap(bmp);
+        m_map[bitmap_key] = bitmap;
+    } else {
+        bitmap = it->second;
+        *bitmap = bmp;
+    }
+    return bitmap;
+}
+
+wxBitmap* BitmapCache::insert(const std::string &bitmap_key, const wxBitmap &bmp, const wxBitmap &bmp2)
+{
+    // Copying the wxBitmaps is cheap as the bitmap's content is reference counted.
+    const wxBitmap bmps[2] = { bmp, bmp2 };
+    return this->insert(bitmap_key, bmps, bmps + 2);
+}
+
+wxBitmap* BitmapCache::insert(const std::string &bitmap_key, const wxBitmap &bmp, const wxBitmap &bmp2, const wxBitmap &bmp3)
+{
+    // Copying the wxBitmaps is cheap as the bitmap's content is reference counted.
+    const wxBitmap bmps[3] = { bmp, bmp2, bmp3 };
+    return this->insert(bitmap_key, bmps, bmps + 3);
+}
+
+wxBitmap* BitmapCache::insert(const std::string &bitmap_key, const wxBitmap *begin, const wxBitmap *end)
+{
+    size_t width  = 0;
+    size_t height = 0;
+    for (const wxBitmap *bmp = begin; bmp != end; ++ bmp) {
+        width += bmp->GetWidth();
+        height = std::max<size_t>(height, bmp->GetHeight());
+    }
+
+#ifdef BROKEN_ALPHA
+
+    wxImage image(width, height);
+    image.InitAlpha();
+    // Fill in with a white color.
+    memset(image.GetData(), 0x0ff, width * height * 3);
+    // Fill in with full transparency.
+    memset(image.GetAlpha(),    0, width * height);
+    size_t x = 0;
+    for (const wxBitmap *bmp = begin; bmp != end; ++ bmp) {
+        if (bmp->GetWidth() > 0) {
+            if (bmp->GetDepth() == 32) {
+                wxAlphaPixelData data(*const_cast<wxBitmap*>(bmp));
+                data.UseAlpha();
+                if (data) {
+                    for (int r = 0; r < bmp->GetHeight(); ++ r) {
+                        wxAlphaPixelData::Iterator src(data);
+                        src.Offset(data, 0, r);
+                        unsigned char *dst_pixels = image.GetData()  + (x + r * width) * 3;
+                        unsigned char *dst_alpha  = image.GetAlpha() +  x + r * width;
+                        for (int c = 0; c < bmp->GetWidth(); ++ c, ++ src) {
+                            *dst_pixels ++ = src.Red();
+                            *dst_pixels ++ = src.Green();
+                            *dst_pixels ++ = src.Blue();
+                            *dst_alpha  ++ = src.Alpha();
+                        }
+                    }
+                }
+            } else if (bmp->GetDepth() == 24) {
+                wxNativePixelData data(*const_cast<wxBitmap*>(bmp));
+                if (data) {
+                    for (int r = 0; r < bmp->GetHeight(); ++ r) {
+                        wxNativePixelData::Iterator src(data);
+                        src.Offset(data, 0, r);
+                        unsigned char *dst_pixels = image.GetData()  + (x + r * width) * 3;
+                        unsigned char *dst_alpha  = image.GetAlpha() +  x + r * width;
+                        for (int c = 0; c < bmp->GetWidth(); ++ c, ++ src) {
+                            *dst_pixels ++ = src.Red();
+                            *dst_pixels ++ = src.Green();
+                            *dst_pixels ++ = src.Blue();
+                            *dst_alpha  ++ = wxALPHA_OPAQUE;
+                        }
+                    }
+                }
+            }
+        }
+        x += bmp->GetWidth();
+    }
+    return this->insert(bitmap_key, wxImage_to_wxBitmap_with_alpha(std::move(image)));
+
+#else
+
+    wxBitmap *bitmap = this->insert(bitmap_key, width, height);
+    wxMemoryDC memDC;
+    memDC.SelectObject(*bitmap);
+    memDC.SetBackground(*wxTRANSPARENT_BRUSH);
+    memDC.Clear();
+    size_t x = 0;
+    for (const wxBitmap *bmp = begin; bmp != end; ++ bmp) {
+        if (bmp->GetWidth() > 0)
+            memDC.DrawBitmap(*bmp, x, 0, true);
+        x += bmp->GetWidth();
+    }
+    memDC.SelectObject(wxNullBitmap);
+    return bitmap;
+
+#endif
+}
+
+wxBitmap BitmapCache::mksolid(size_t width, size_t height, unsigned char r, unsigned char g, unsigned char b, unsigned char transparency)
+{
+    wxImage image(width, height);
+    image.InitAlpha();
+    unsigned char* imgdata = image.GetData();
+    unsigned char* imgalpha = image.GetAlpha();
+    for (size_t i = 0; i < width * height; ++ i) {
+        *imgdata ++ = r;
+        *imgdata ++ = g;
+        *imgdata ++ = b;
+        *imgalpha ++ = transparency;
+    }
+    return wxImage_to_wxBitmap_with_alpha(std::move(image));
+}
+
+} // namespace GUI
+} // namespace Slic3r

src/slic3r/GUI/BitmapCache.hpp

@@ -0,0 +1,44 @@
+#ifndef SLIC3R_GUI_BITMAP_CACHE_HPP
+#define SLIC3R_GUI_BITMAP_CACHE_HPP
+
+#include <wx/wxprec.h>
+#ifndef WX_PRECOMP
+    #include <wx/wx.h>
+#endif
+
+#include "../../libslic3r/libslic3r.h"
+#include "../../libslic3r/Config.hpp"
+
+#include "GUI.hpp"
+
+namespace Slic3r { namespace GUI {
+
+class BitmapCache
+{
+public:
+	BitmapCache() {}
+	~BitmapCache() { clear(); }
+	void 			clear();
+
+	wxBitmap* 		find(const std::string &name) 		{ auto it = m_map.find(name); return (it == m_map.end()) ? nullptr : it->second; }
+	const wxBitmap* find(const std::string &name) const { return const_cast<BitmapCache*>(this)->find(name); }
+
+	wxBitmap*       insert(const std::string &name, size_t width, size_t height);
+	wxBitmap* 		insert(const std::string &name, const wxBitmap &bmp);
+	wxBitmap* 		insert(const std::string &name, const wxBitmap &bmp, const wxBitmap &bmp2);
+	wxBitmap* 		insert(const std::string &name, const wxBitmap &bmp, const wxBitmap &bmp2, const wxBitmap &bmp3);
+	wxBitmap* 		insert(const std::string &name, const std::vector<wxBitmap> &bmps) { return this->insert(name, &bmps.front(), &bmps.front() + bmps.size()); }
+	wxBitmap* 		insert(const std::string &name, const wxBitmap *begin, const wxBitmap *end);
+
+	static wxBitmap mksolid(size_t width, size_t height, unsigned char r, unsigned char g, unsigned char b, unsigned char transparency);
+	static wxBitmap mksolid(size_t width, size_t height, const unsigned char rgb[3]) { return mksolid(width, height, rgb[0], rgb[1], rgb[2], wxALPHA_OPAQUE); }
+	static wxBitmap mkclear(size_t width, size_t height) { return mksolid(width, height, 0, 0, 0, wxALPHA_TRANSPARENT); }
+
+private:
+    std::map<std::string, wxBitmap*>	m_map;
+};
+
+} // GUI
+} // Slic3r
+
+#endif /* SLIC3R_GUI_BITMAP_CACHE_HPP */

src/slic3r/GUI/BonjourDialog.cpp

@@ -0,0 +1,200 @@
+#include "slic3r/Utils/Bonjour.hpp"   // On Windows, boost needs to be included before wxWidgets headers
+
+#include "BonjourDialog.hpp"
+
+#include <set>
+#include <mutex>
+
+#include <wx/sizer.h>
+#include <wx/button.h>
+#include <wx/listctrl.h>
+#include <wx/stattext.h>
+#include <wx/timer.h>
+
+#include "slic3r/GUI/GUI.hpp"
+#include "slic3r/Utils/Bonjour.hpp"
+
+
+namespace Slic3r {
+
+
+struct BonjourReplyEvent : public wxEvent
+{
+	BonjourReply reply;
+
+	BonjourReplyEvent(wxEventType eventType, int winid, BonjourReply &&reply) :
+		wxEvent(winid, eventType),
+		reply(std::move(reply))
+	{}
+
+	virtual wxEvent *Clone() const
+	{
+		return new BonjourReplyEvent(*this);
+	}
+};
+
+wxDEFINE_EVENT(EVT_BONJOUR_REPLY, BonjourReplyEvent);
+
+wxDECLARE_EVENT(EVT_BONJOUR_COMPLETE, wxCommandEvent);
+wxDEFINE_EVENT(EVT_BONJOUR_COMPLETE, wxCommandEvent);
+
+class ReplySet: public std::set<BonjourReply> {};
+
+struct LifetimeGuard
+{
+	std::mutex mutex;
+	BonjourDialog *dialog;
+
+	LifetimeGuard(BonjourDialog *dialog) : dialog(dialog) {}
+};
+
+
+BonjourDialog::BonjourDialog(wxWindow *parent) :
+	wxDialog(parent, wxID_ANY, _(L("Network lookup"))),
+	list(new wxListView(this, wxID_ANY, wxDefaultPosition, wxSize(800, 300))),
+	replies(new ReplySet),
+	label(new wxStaticText(this, wxID_ANY, "")),
+	timer(new wxTimer()),
+	timer_state(0)
+{
+	wxBoxSizer *vsizer = new wxBoxSizer(wxVERTICAL);
+
+	vsizer->Add(label, 0, wxEXPAND | wxTOP | wxLEFT | wxRIGHT, 10);
+
+	list->SetSingleStyle(wxLC_SINGLE_SEL);
+	list->SetSingleStyle(wxLC_SORT_DESCENDING);
+	list->AppendColumn(_(L("Address")), wxLIST_FORMAT_LEFT, 50);
+	list->AppendColumn(_(L("Hostname")), wxLIST_FORMAT_LEFT, 100);
+	list->AppendColumn(_(L("Service name")), wxLIST_FORMAT_LEFT, 200);
+	list->AppendColumn(_(L("OctoPrint version")), wxLIST_FORMAT_LEFT, 50);
+
+	vsizer->Add(list, 1, wxEXPAND | wxALL, 10);
+
+	wxBoxSizer *button_sizer = new wxBoxSizer(wxHORIZONTAL);
+	button_sizer->Add(new wxButton(this, wxID_OK, "OK"), 0, wxALL, 10);
+	button_sizer->Add(new wxButton(this, wxID_CANCEL, "Cancel"), 0, wxALL, 10);
+	// ^ Note: The Ok/Cancel labels are translated by wxWidgets
+
+	vsizer->Add(button_sizer, 0, wxALIGN_CENTER);
+	SetSizerAndFit(vsizer);
+
+	Bind(EVT_BONJOUR_REPLY, &BonjourDialog::on_reply, this);
+
+	Bind(EVT_BONJOUR_COMPLETE, [this](wxCommandEvent &) {
+		this->timer_state = 0;
+	});
+
+	Bind(wxEVT_TIMER, &BonjourDialog::on_timer, this);
+}
+
+BonjourDialog::~BonjourDialog()
+{
+	// Needed bacuse of forward defs
+}
+
+bool BonjourDialog::show_and_lookup()
+{
+	Show();   // Because we need GetId() to work before ShowModal()
+
+	timer->Stop();
+	timer->SetOwner(this);
+	timer_state = 1;
+	timer->Start(1000);
+	wxTimerEvent evt_dummy;
+	on_timer(evt_dummy);
+
+	// The background thread needs to queue messages for this dialog
+	// and for that it needs a valid pointer to it (mandated by the wxWidgets API).
+	// Here we put the pointer under a shared_ptr and protect it by a mutex,
+	// so that both threads can access it safely.
+	auto dguard = std::make_shared<LifetimeGuard>(this);
+
+	bonjour = std::move(Bonjour("octoprint")
+		.set_retries(3)
+		.set_timeout(4)
+		.on_reply([dguard](BonjourReply &&reply) {
+			std::lock_guard<std::mutex> lock_guard(dguard->mutex);
+			auto dialog = dguard->dialog;
+			if (dialog != nullptr) {
+				auto evt = new BonjourReplyEvent(EVT_BONJOUR_REPLY, dialog->GetId(), std::move(reply));
+				wxQueueEvent(dialog, evt);
+			}
+		})
+		.on_complete([dguard]() {
+			std::lock_guard<std::mutex> lock_guard(dguard->mutex);
+			auto dialog = dguard->dialog;
+			if (dialog != nullptr) {
+				auto evt = new wxCommandEvent(EVT_BONJOUR_COMPLETE, dialog->GetId());
+				wxQueueEvent(dialog, evt);
+			}
+		})
+		.lookup()
+	);
+
+	bool res = ShowModal() == wxID_OK && list->GetFirstSelected() >= 0;
+	{
+		// Tell the background thread the dialog is going away...
+		std::lock_guard<std::mutex> lock_guard(dguard->mutex);
+		dguard->dialog = nullptr;
+	}
+	return res;
+}
+
+wxString BonjourDialog::get_selected() const
+{
+	auto sel = list->GetFirstSelected();
+	return sel >= 0 ? list->GetItemText(sel) : wxString();
+}
+
+
+// Private
+
+void BonjourDialog::on_reply(BonjourReplyEvent &e)
+{
+	if (replies->find(e.reply) != replies->end()) {
+		// We already have this reply
+		return;
+	}
+
+	replies->insert(std::move(e.reply));
+
+	auto selected = get_selected();
+	list->DeleteAllItems();
+
+	// The whole list is recreated so that we benefit from it already being sorted in the set.
+	// (And also because wxListView's sorting API is bananas.)
+	for (const auto &reply : *replies) {
+		auto item = list->InsertItem(0, reply.full_address);
+		list->SetItem(item, 1, reply.hostname);
+		list->SetItem(item, 2, reply.service_name);
+		list->SetItem(item, 3, reply.version);
+	}
+
+	for (int i = 0; i < 4; i++) {
+		this->list->SetColumnWidth(i, wxLIST_AUTOSIZE);
+		if (this->list->GetColumnWidth(i) < 100) { this->list->SetColumnWidth(i, 100); }
+	}
+
+	if (!selected.IsEmpty()) {
+		// Attempt to preserve selection
+		auto hit = list->FindItem(-1, selected);
+		if (hit >= 0) { list->SetItemState(hit, wxLIST_STATE_SELECTED, wxLIST_STATE_SELECTED); }
+	}
+}
+
+void BonjourDialog::on_timer(wxTimerEvent &)
+{
+	const auto search_str = _(L("Searching for devices"));
+
+	if (timer_state > 0) {
+		const std::string dots(timer_state, '.');
+		label->SetLabel(wxString::Format("%s %s", search_str, dots));
+		timer_state = (timer_state) % 3 + 1;
+	} else {
+		label->SetLabel(wxString::Format("%s: %s", search_str, _(L("Finished"))+"."));
+		timer->Stop();
+	}
+}
+
+
+}

src/slic3r/GUI/BonjourDialog.hpp

@@ -0,0 +1,49 @@
+#ifndef slic3r_BonjourDialog_hpp_
+#define slic3r_BonjourDialog_hpp_
+
+#include <memory>
+
+#include <wx/dialog.h>
+
+class wxListView;
+class wxStaticText;
+class wxTimer;
+class wxTimerEvent;
+
+
+namespace Slic3r {
+
+class Bonjour;
+class BonjourReplyEvent;
+class ReplySet;
+
+
+class BonjourDialog: public wxDialog
+{
+public:
+	BonjourDialog(wxWindow *parent);
+	BonjourDialog(BonjourDialog &&) = delete;
+	BonjourDialog(const BonjourDialog &) = delete;
+	BonjourDialog &operator=(BonjourDialog &&) = delete;
+	BonjourDialog &operator=(const BonjourDialog &) = delete;
+	~BonjourDialog();
+
+	bool show_and_lookup();
+	wxString get_selected() const;
+private:
+	wxListView *list;
+	std::unique_ptr<ReplySet> replies;
+	wxStaticText *label;
+	std::shared_ptr<Bonjour> bonjour;
+	std::unique_ptr<wxTimer> timer;
+	unsigned timer_state;
+
+	void on_reply(BonjourReplyEvent &);
+	void on_timer(wxTimerEvent &);
+};
+
+
+
+}
+
+#endif

src/slic3r/GUI/ButtonsDescription.cpp

@@ -0,0 +1,84 @@
+#include "ButtonsDescription.hpp"
+#include <wx/sizer.h>
+#include <wx/stattext.h>
+#include <wx/statbmp.h>
+#include <wx/clrpicker.h>
+
+#include "GUI.hpp"
+
+namespace Slic3r {
+namespace GUI {
+
+ButtonsDescription::ButtonsDescription(wxWindow* parent, t_icon_descriptions* icon_descriptions) :
+	wxDialog(parent, wxID_ANY, _(L("Buttons And Text Colors Description")), wxDefaultPosition, wxDefaultSize),
+	m_icon_descriptions(icon_descriptions)
+{
+	auto grid_sizer = new wxFlexGridSizer(3, 20, 20);
+
+	auto main_sizer = new wxBoxSizer(wxVERTICAL);
+	main_sizer->Add(grid_sizer, 0, wxEXPAND | wxALL, 20);
+
+	// Icon description
+	for (auto pair : *m_icon_descriptions)
+	{
+		auto icon = new wxStaticBitmap(this, wxID_ANY, *pair.first);
+		grid_sizer->Add(icon, -1, wxALIGN_CENTRE_VERTICAL);
+
+		std::istringstream f(pair.second);
+		std::string s;
+		getline(f, s, ';');
+		auto description = new wxStaticText(this, wxID_ANY, _(s));
+		grid_sizer->Add(description, -1, wxALIGN_CENTRE_VERTICAL);
+		getline(f, s, ';');
+		description = new wxStaticText(this, wxID_ANY, _(s));
+		grid_sizer->Add(description, -1, wxALIGN_CENTRE_VERTICAL | wxEXPAND);
+	}
+
+	// Text color description
+	auto sys_label = new wxStaticText(this, wxID_ANY, _(L("Value is the same as the system value")));
+	sys_label->SetForegroundColour(get_label_clr_sys());
+	auto sys_colour = new wxColourPickerCtrl(this, wxID_ANY, get_label_clr_sys());
+	sys_colour->Bind(wxEVT_COLOURPICKER_CHANGED, ([sys_colour, sys_label](wxCommandEvent e)
+	{
+		sys_label->SetForegroundColour(sys_colour->GetColour());
+		sys_label->Refresh();
+	}));
+	size_t t= 0;
+	while (t < 3){
+		grid_sizer->Add(new wxStaticText(this, wxID_ANY, ""), -1, wxALIGN_CENTRE_VERTICAL | wxEXPAND);
+		++t;
+	}
+	grid_sizer->Add(0, -1, wxALIGN_CENTRE_VERTICAL);
+	grid_sizer->Add(sys_colour, -1, wxALIGN_CENTRE_VERTICAL);
+	grid_sizer->Add(sys_label, -1, wxALIGN_CENTRE_VERTICAL | wxEXPAND);
+
+	auto mod_label = new wxStaticText(this, wxID_ANY, _(L("Value was changed and is not equal to the system value or the last saved preset")));
+	mod_label->SetForegroundColour(get_label_clr_modified());
+	auto mod_colour = new wxColourPickerCtrl(this, wxID_ANY, get_label_clr_modified());
+	mod_colour->Bind(wxEVT_COLOURPICKER_CHANGED, ([mod_colour, mod_label](wxCommandEvent e)
+	{
+		mod_label->SetForegroundColour(mod_colour->GetColour());
+		mod_label->Refresh();
+	}));
+	grid_sizer->Add(0, -1, wxALIGN_CENTRE_VERTICAL);
+	grid_sizer->Add(mod_colour, -1, wxALIGN_CENTRE_VERTICAL);
+	grid_sizer->Add(mod_label, -1, wxALIGN_CENTRE_VERTICAL | wxEXPAND);
+	
+
+	auto buttons = CreateStdDialogButtonSizer(wxOK|wxCANCEL);
+	main_sizer->Add(buttons, 0, wxALIGN_CENTER_HORIZONTAL | wxBOTTOM, 10);
+
+	wxButton* btn = static_cast<wxButton*>(FindWindowById(wxID_OK, this));
+	btn->Bind(wxEVT_BUTTON, [sys_colour, mod_colour, this](wxCommandEvent&) { 
+		set_label_clr_sys(sys_colour->GetColour());
+		set_label_clr_modified(mod_colour->GetColour());
+		EndModal(wxID_OK);
+		});
+
+	SetSizer(main_sizer);
+	main_sizer->SetSizeHints(this);
+}
+
+} // GUI
+} // Slic3r
+

src/slic3r/GUI/ButtonsDescription.hpp

@@ -0,0 +1,27 @@
+#ifndef slic3r_ButtonsDescription_hpp
+#define slic3r_ButtonsDescription_hpp
+
+#include <wx/dialog.h>
+#include <vector>
+
+namespace Slic3r {
+namespace GUI {
+
+using t_icon_descriptions = std::vector<std::pair<wxBitmap*, std::string>>;
+
+class ButtonsDescription : public wxDialog
+{
+	t_icon_descriptions* m_icon_descriptions;
+public:
+	ButtonsDescription(wxWindow* parent, t_icon_descriptions* icon_descriptions);
+	~ButtonsDescription(){}
+
+
+};
+
+} // GUI
+} // Slic3r
+
+
+#endif 
+

src/slic3r/GUI/ConfigExceptions.hpp

@@ -0,0 +1,15 @@
+#include <exception> 
+namespace Slic3r {
+
+class ConfigError : public std::runtime_error { 
+using std::runtime_error::runtime_error;
+};
+
+namespace GUI {
+
+class ConfigGUITypeError : public ConfigError { 
+using ConfigError::ConfigError;
+};
+}
+
+}

src/slic3r/GUI/ConfigSnapshotDialog.cpp

@@ -0,0 +1,140 @@
+#include "ConfigSnapshotDialog.hpp"
+
+#include "../Config/Snapshot.hpp"
+#include "../Utils/Time.hpp"
+
+#include "../../libslic3r/Utils.hpp"
+
+namespace Slic3r { 
+namespace GUI {
+
+static wxString format_reason(const Config::Snapshot::Reason reason) 
+{
+    switch (reason) {
+    case Config::Snapshot::SNAPSHOT_UPGRADE:
+        return wxString(_(L("Upgrade")));
+    case Config::Snapshot::SNAPSHOT_DOWNGRADE:
+        return wxString(_(L("Downgrade")));
+    case Config::Snapshot::SNAPSHOT_BEFORE_ROLLBACK:
+        return wxString(_(L("Before roll back")));
+    case Config::Snapshot::SNAPSHOT_USER:
+        return wxString(_(L("User")));
+    case Config::Snapshot::SNAPSHOT_UNKNOWN:
+    default:
+        return wxString(_(L("Unknown")));
+    }
+}
+
+static wxString generate_html_row(const Config::Snapshot &snapshot, bool row_even, bool snapshot_active)
+{
+    // Start by declaring a row with an alternating background color.
+    wxString text = "<tr bgcolor=\"";
+    text += snapshot_active ? "#B3FFCB" : (row_even ? "#FFFFFF" : "#D5D5D5");
+    text += "\">";
+    text += "<td>";
+    // Format the row header.
+    text += wxString("<font size=\"5\"><b>") + (snapshot_active ? _(L("Active: ")) : "") + 
+        Utils::format_local_date_time(snapshot.time_captured) + ": " + format_reason(snapshot.reason);
+    if (! snapshot.comment.empty())
+        text += " (" + snapshot.comment + ")";
+    text += "</b></font><br>";
+    // End of row header.
+    text += _(L("slic3r version")) + ": " + snapshot.slic3r_version_captured.to_string() + "<br>";
+    text += _(L("print")) + ": " + snapshot.print + "<br>";
+    text += _(L("filaments")) + ": " + snapshot.filaments.front() + "<br>";
+    text += _(L("printer")) + ": " + snapshot.printer + "<br>";
+
+    bool compatible = true;
+    for (const Config::Snapshot::VendorConfig &vc : snapshot.vendor_configs) {
+        text += _(L("vendor")) + ": " + vc.name +", " + _(L("version")) + ": " + vc.version.config_version.to_string() + 
+				", " + _(L("min slic3r version")) + ": " + vc.version.min_slic3r_version.to_string();
+        if (vc.version.max_slic3r_version != Semver::inf())
+            text += ", " + _(L("max slic3r version")) + ": " + vc.version.max_slic3r_version.to_string();
+        text += "<br>";
+        for (const std::pair<std::string, std::set<std::string>> &model : vc.models_variants_installed) {
+            text += _(L("model")) + ": " + model.first + ", " + _(L("variants")) + ": ";
+            for (const std::string &variant : model.second) {
+                if (&variant != &*model.second.begin())
+                    text += ", ";
+                text += variant;
+            }
+            text += "<br>";
+        }
+        if (! vc.version.is_current_slic3r_supported()) { compatible = false; }
+    }
+
+    if (! compatible) {
+        text += "<p align=\"right\">" + _(L("Incompatible with this Slic3r")) + "</p>";
+    }
+    else if (! snapshot_active)
+        text += "<p align=\"right\"><a href=\"" + snapshot.id + "\">" + _(L("Activate")) + "</a></p>";
+    text += "</td>";
+	text += "</tr>";
+    return text;
+}
+
+static wxString generate_html_page(const Config::SnapshotDB &snapshot_db, const wxString &on_snapshot)
+{
+    wxString text = 
+        "<html>"
+        "<body bgcolor=\"#ffffff\" cellspacing=\"2\" cellpadding=\"0\" border=\"0\" link=\"#800000\">"
+        "<font color=\"#000000\">";
+    text += "<table style=\"width:100%\">";
+    for (size_t i_row = 0; i_row < snapshot_db.snapshots().size(); ++ i_row) {
+        const Config::Snapshot &snapshot = snapshot_db.snapshots()[snapshot_db.snapshots().size() - i_row - 1];
+        text += generate_html_row(snapshot, i_row & 1, snapshot.id == on_snapshot);
+    }
+    text +=
+        "</table>"
+        "</font>"
+        "</body>"
+        "</html>";
+    return text;
+}
+
+ConfigSnapshotDialog::ConfigSnapshotDialog(const Config::SnapshotDB &snapshot_db, const wxString &on_snapshot)
+    : wxDialog(NULL, wxID_ANY, _(L("Configuration Snapshots")), wxDefaultPosition, wxSize(600, 500), wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER | wxMAXIMIZE_BOX)
+{
+    this->SetBackgroundColour(*wxWHITE);
+    
+    wxBoxSizer* vsizer = new wxBoxSizer(wxVERTICAL);
+    this->SetSizer(vsizer);
+
+    // text
+    wxHtmlWindow* html = new wxHtmlWindow(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHW_SCROLLBAR_AUTO);
+    {
+        wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+        #ifdef __WXMSW__
+            int size[] = {8,8,8,8,11,11,11};
+        #else
+            int size[] = {11,11,11,11,14,14,14};
+        #endif
+        html->SetFonts(font.GetFaceName(), font.GetFaceName(), size);
+        html->SetBorders(2);
+        wxString text = generate_html_page(snapshot_db, on_snapshot);
+        html->SetPage(text);
+        vsizer->Add(html, 1, wxEXPAND | wxALIGN_LEFT | wxRIGHT | wxBOTTOM, 0);
+        html->Bind(wxEVT_HTML_LINK_CLICKED, &ConfigSnapshotDialog::onLinkClicked, this);
+    }
+    
+    wxStdDialogButtonSizer* buttons = this->CreateStdDialogButtonSizer(wxCLOSE);
+    this->SetEscapeId(wxID_CLOSE);
+    this->Bind(wxEVT_BUTTON, &ConfigSnapshotDialog::onCloseDialog, this, wxID_CLOSE);
+    vsizer->Add(buttons, 0, wxEXPAND | wxRIGHT | wxBOTTOM, 3);
+}
+
+void ConfigSnapshotDialog::onLinkClicked(wxHtmlLinkEvent &event)
+{
+    m_snapshot_to_activate = event.GetLinkInfo().GetHref();
+    this->EndModal(wxID_CLOSE);
+    this->Close();
+}
+
+void ConfigSnapshotDialog::onCloseDialog(wxEvent &)
+{
+    this->EndModal(wxID_CLOSE);
+    this->Close();
+}
+
+} // namespace GUI
+} // namespace Slic3r

src/slic3r/GUI/ConfigSnapshotDialog.hpp

@@ -0,0 +1,34 @@
+#ifndef slic3r_GUI_ConfigSnapshotDialog_hpp_
+#define slic3r_GUI_ConfigSnapshotDialog_hpp_
+
+#include "GUI.hpp"
+
+#include <wx/wx.h>
+#include <wx/intl.h>
+#include <wx/html/htmlwin.h>
+
+namespace Slic3r { 
+namespace GUI {
+
+namespace Config {
+	class SnapshotDB;
+}
+
+class ConfigSnapshotDialog : public wxDialog
+{
+public:
+    ConfigSnapshotDialog(const Config::SnapshotDB &snapshot_db, const wxString &id);
+    const std::string& snapshot_to_activate() const { return m_snapshot_to_activate; }
+
+private:
+    void onLinkClicked(wxHtmlLinkEvent &event);
+    void onCloseDialog(wxEvent &);
+
+    // If set, it contains a snapshot ID to be restored after the dialog closes.
+    std::string m_snapshot_to_activate;
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif /* slic3r_GUI_ConfigSnapshotDialog_hpp_ */

src/slic3r/GUI/ConfigWizard.cpp

@@ -0,0 +1,915 @@
+#include "ConfigWizard_private.hpp"
+
+#include <algorithm>
+#include <utility>
+#include <unordered_map>
+#include <boost/format.hpp>
+#include <boost/log/trivial.hpp>
+
+#include <wx/settings.h>
+#include <wx/stattext.h>
+#include <wx/textctrl.h>
+#include <wx/dcclient.h>
+#include <wx/statbmp.h>
+#include <wx/checkbox.h>
+#include <wx/statline.h>
+
+#include "libslic3r/Utils.hpp"
+#include "PresetBundle.hpp"
+#include "GUI.hpp"
+#include "slic3r/Utils/PresetUpdater.hpp"
+
+
+namespace Slic3r {
+namespace GUI {
+
+
+// Printer model picker GUI control
+
+struct PrinterPickerEvent : public wxEvent
+{
+	std::string vendor_id;
+	std::string model_id;
+	std::string variant_name;
+	bool enable;
+
+	PrinterPickerEvent(wxEventType eventType, int winid, std::string vendor_id, std::string model_id, std::string variant_name, bool enable) :
+		wxEvent(winid, eventType),
+		vendor_id(std::move(vendor_id)),
+		model_id(std::move(model_id)),
+		variant_name(std::move(variant_name)),
+		enable(enable)
+	{}
+
+	virtual wxEvent *Clone() const
+	{
+		return new PrinterPickerEvent(*this);
+	}
+};
+
+wxDEFINE_EVENT(EVT_PRINTER_PICK, PrinterPickerEvent);
+
+PrinterPicker::PrinterPicker(wxWindow *parent, const VendorProfile &vendor, const AppConfig &appconfig_vendors) :
+	wxPanel(parent),
+	vendor_id(vendor.id),
+	variants_checked(0)
+{
+	const auto &models = vendor.models;
+
+	auto *sizer = new wxBoxSizer(wxVERTICAL);
+
+	auto *printer_grid = new wxFlexGridSizer(models.size(), 0, 20);
+	printer_grid->SetFlexibleDirection(wxVERTICAL | wxHORIZONTAL);
+	sizer->Add(printer_grid);
+
+	auto namefont = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+	namefont.SetWeight(wxFONTWEIGHT_BOLD);
+
+	// wxGrid appends widgets by rows, but we need to construct them in columns.
+	// These vectors are used to hold the elements so that they can be appended in the right order.
+	std::vector<wxStaticText*> titles;
+	std::vector<wxStaticBitmap*> bitmaps;
+	std::vector<wxPanel*> variants_panels;
+
+	for (const auto &model : models) {
+		auto bitmap_file = wxString::Format("printers/%s_%s.png", vendor.id, model.id);
+		wxBitmap bitmap(GUI::from_u8(Slic3r::var(bitmap_file.ToStdString())), wxBITMAP_TYPE_PNG);
+
+		auto *title = new wxStaticText(this, wxID_ANY, model.name, wxDefaultPosition, wxDefaultSize, wxALIGN_LEFT);
+		title->SetFont(namefont);
+		title->Wrap(std::max((int)MODEL_MIN_WRAP, bitmap.GetWidth()));
+		titles.push_back(title);
+
+		auto *bitmap_widget = new wxStaticBitmap(this, wxID_ANY, bitmap);
+		bitmaps.push_back(bitmap_widget);
+
+		auto *variants_panel = new wxPanel(this);
+		auto *variants_sizer = new wxBoxSizer(wxVERTICAL);
+		variants_panel->SetSizer(variants_sizer);
+		const auto model_id = model.id;
+
+		bool default_variant = true;   // Mark the first variant as default in the GUI
+		for (const auto &variant : model.variants) {
+			const auto label = wxString::Format("%s %s %s %s", variant.name, _(L("mm")), _(L("nozzle")),
+				(default_variant ? _(L("(default)")) : wxString()));
+			default_variant = false;
+			auto *cbox = new Checkbox(variants_panel, label, model_id, variant.name);
+			const size_t idx = cboxes.size();
+			cboxes.push_back(cbox);
+			bool enabled = appconfig_vendors.get_variant("PrusaResearch", model_id, variant.name);
+			variants_checked += enabled;
+			cbox->SetValue(enabled);
+			variants_sizer->Add(cbox, 0, wxBOTTOM, 3);
+			cbox->Bind(wxEVT_CHECKBOX, [this, idx](wxCommandEvent &event) {
+				if (idx >= this->cboxes.size()) { return; }
+				this->on_checkbox(this->cboxes[idx], event.IsChecked());
+			});
+		}
+
+		variants_panels.push_back(variants_panel);
+	}
+
+	for (auto title : titles)       { printer_grid->Add(title, 0, wxBOTTOM, 3); }
+	for (auto bitmap : bitmaps)     { printer_grid->Add(bitmap, 0, wxBOTTOM, 20); }
+	for (auto vp : variants_panels) { printer_grid->Add(vp); }
+
+	auto *all_none_sizer = new wxBoxSizer(wxHORIZONTAL);
+	auto *sel_all = new wxButton(this, wxID_ANY, _(L("Select all")));
+	auto *sel_none = new wxButton(this, wxID_ANY, _(L("Select none")));
+	sel_all->Bind(wxEVT_BUTTON, [this](const wxCommandEvent &event) { this->select_all(true); });
+	sel_none->Bind(wxEVT_BUTTON, [this](const wxCommandEvent &event) { this->select_all(false); });
+	all_none_sizer->AddStretchSpacer();
+	all_none_sizer->Add(sel_all);
+	all_none_sizer->Add(sel_none);
+	sizer->AddStretchSpacer();
+	sizer->Add(all_none_sizer, 0, wxEXPAND);
+
+	SetSizer(sizer);
+}
+
+void PrinterPicker::select_all(bool select)
+{
+	for (const auto &cb : cboxes) {
+		if (cb->GetValue() != select) {
+			cb->SetValue(select);
+			on_checkbox(cb, select);
+		}
+	}
+}
+
+void PrinterPicker::select_one(size_t i, bool select)
+{
+	if (i < cboxes.size() && cboxes[i]->GetValue() != select) {
+		cboxes[i]->SetValue(select);
+		on_checkbox(cboxes[i], select);
+	}
+}
+
+void PrinterPicker::on_checkbox(const Checkbox *cbox, bool checked)
+{
+	variants_checked += checked ? 1 : -1;
+	PrinterPickerEvent evt(EVT_PRINTER_PICK, GetId(), vendor_id, cbox->model, cbox->variant, checked);
+	AddPendingEvent(evt);
+}
+
+
+// Wizard page base
+
+ConfigWizardPage::ConfigWizardPage(ConfigWizard *parent, wxString title, wxString shortname) :
+	wxPanel(parent->p->hscroll),
+	parent(parent),
+	shortname(std::move(shortname)),
+	p_prev(nullptr),
+	p_next(nullptr)
+{
+	auto *sizer = new wxBoxSizer(wxVERTICAL);
+
+	auto *text = new wxStaticText(this, wxID_ANY, std::move(title), wxDefaultPosition, wxDefaultSize, wxALIGN_LEFT);
+	auto font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+	font.SetWeight(wxFONTWEIGHT_BOLD);
+	font.SetPointSize(14);
+	text->SetFont(font);
+	sizer->Add(text, 0, wxALIGN_LEFT, 0);
+	sizer->AddSpacer(10);
+
+	content = new wxBoxSizer(wxVERTICAL);
+	sizer->Add(content, 1);
+
+	SetSizer(sizer);
+
+	this->Hide();
+
+	Bind(wxEVT_SIZE, [this](wxSizeEvent &event) {
+		this->Layout();
+		event.Skip();
+	});
+}
+
+ConfigWizardPage::~ConfigWizardPage() {}
+
+ConfigWizardPage* ConfigWizardPage::chain(ConfigWizardPage *page)
+{
+	if (p_next != nullptr) { p_next->p_prev = nullptr; }
+	p_next = page;
+	if (page != nullptr) {
+		if (page->p_prev != nullptr) { page->p_prev->p_next = nullptr; }
+		page->p_prev = this;
+	}
+
+	return page;
+}
+
+void ConfigWizardPage::append_text(wxString text)
+{
+	auto *widget = new wxStaticText(this, wxID_ANY, text, wxDefaultPosition, wxDefaultSize, wxALIGN_LEFT);
+	widget->Wrap(WRAP_WIDTH);
+	widget->SetMinSize(wxSize(WRAP_WIDTH, -1));
+	append(widget);
+}
+
+void ConfigWizardPage::append_spacer(int space)
+{
+	content->AddSpacer(space);
+}
+
+bool ConfigWizardPage::Show(bool show)
+{
+	if (extra_buttons() != nullptr) { extra_buttons()->Show(show); }
+	return wxPanel::Show(show);
+}
+
+void ConfigWizardPage::enable_next(bool enable) { parent->p->enable_next(enable); }
+
+
+// Wizard pages
+
+PageWelcome::PageWelcome(ConfigWizard *parent, bool check_first_variant) :
+	ConfigWizardPage(parent, wxString::Format(_(L("Welcome to the Slic3r %s")), ConfigWizard::name()), _(L("Welcome"))),
+	printer_picker(nullptr),
+	others_buttons(new wxPanel(parent)),
+	cbox_reset(nullptr)
+{
+	if (wizard_p()->run_reason == ConfigWizard::RR_DATA_EMPTY) {
+		wxString::Format(_(L("Run %s")), ConfigWizard::name());
+		append_text(wxString::Format(
+			_(L("Hello, welcome to Slic3r Prusa Edition! This %s helps you with the initial configuration; just a few settings and you will be ready to print.")),
+			ConfigWizard::name())
+		);
+	} else {
+		cbox_reset = new wxCheckBox(this, wxID_ANY, _(L("Remove user profiles - install from scratch (a snapshot will be taken beforehand)")));
+		append(cbox_reset);
+	}
+
+	const auto &vendors = wizard_p()->vendors;
+	const auto vendor_prusa = vendors.find("PrusaResearch");
+
+	if (vendor_prusa != vendors.cend()) {
+		AppConfig &appconfig_vendors = this->wizard_p()->appconfig_vendors;
+
+		printer_picker = new PrinterPicker(this, vendor_prusa->second, appconfig_vendors);
+		if (check_first_variant) {
+			// Select the default (first) model/variant on the Prusa vendor
+			printer_picker->select_one(0, true);
+		}
+		printer_picker->Bind(EVT_PRINTER_PICK, [this, &appconfig_vendors](const PrinterPickerEvent &evt) {
+			appconfig_vendors.set_variant(evt.vendor_id, evt.model_id, evt.variant_name, evt.enable);
+			this->on_variant_checked();
+		});
+
+		append(printer_picker);
+	}
+
+	const size_t num_other_vendors = vendors.size() - (vendor_prusa != vendors.cend());
+	auto *sizer = new wxBoxSizer(wxHORIZONTAL);
+	auto *other_vendors = new wxButton(others_buttons, wxID_ANY, _(L("Other vendors")));
+	other_vendors->Enable(num_other_vendors > 0);
+	auto *custom_setup = new wxButton(others_buttons, wxID_ANY, _(L("Custom setup")));
+
+	sizer->Add(other_vendors);
+	sizer->AddSpacer(BTN_SPACING);
+	sizer->Add(custom_setup);
+
+	other_vendors->Bind(wxEVT_BUTTON, [this](const wxCommandEvent &event) { this->wizard_p()->on_other_vendors(); });
+	custom_setup->Bind(wxEVT_BUTTON, [this](const wxCommandEvent &event) { this->wizard_p()->on_custom_setup(); });
+
+	others_buttons->SetSizer(sizer);
+}
+
+void PageWelcome::on_page_set()
+{
+	chain(wizard_p()->page_update);
+	on_variant_checked();
+}
+
+void PageWelcome::on_variant_checked()
+{
+	enable_next(printer_picker != nullptr ? printer_picker->variants_checked > 0 : false);
+}
+
+PageUpdate::PageUpdate(ConfigWizard *parent) :
+	ConfigWizardPage(parent, _(L("Automatic updates")), _(L("Updates"))),
+	version_check(true),
+	preset_update(true)
+{
+	const AppConfig *app_config = GUI::get_app_config();
+	auto boldfont = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+	boldfont.SetWeight(wxFONTWEIGHT_BOLD);
+
+	auto *box_slic3r = new wxCheckBox(this, wxID_ANY, _(L("Check for application updates")));
+	box_slic3r->SetValue(app_config->get("version_check") == "1");
+	append(box_slic3r);
+	append_text(_(L("If enabled, Slic3r checks for new versions of Slic3r PE online. When a new version becomes available a notification is displayed at the next application startup (never during program usage). This is only a notification mechanisms, no automatic installation is done.")));
+
+	append_spacer(VERTICAL_SPACING);
+
+	auto *box_presets = new wxCheckBox(this, wxID_ANY, _(L("Update built-in Presets automatically")));
+	box_presets->SetValue(app_config->get("preset_update") == "1");
+	append(box_presets);
+	append_text(_(L("If enabled, Slic3r downloads updates of built-in system presets in the background. These updates are downloaded into a separate temporary location. When a new preset version becomes available it is offered at application startup.")));
+	const auto text_bold = _(L("Updates are never applied without user's consent and never overwrite user's customized settings."));
+	auto *label_bold = new wxStaticText(this, wxID_ANY, text_bold);
+	label_bold->SetFont(boldfont);
+	label_bold->Wrap(WRAP_WIDTH);
+	append(label_bold);
+	append_text(_(L("Additionally a backup snapshot of the whole configuration is created before an update is applied.")));
+
+	box_slic3r->Bind(wxEVT_CHECKBOX, [this](wxCommandEvent &event) { this->version_check = event.IsChecked(); });
+	box_presets->Bind(wxEVT_CHECKBOX, [this](wxCommandEvent &event) { this->preset_update = event.IsChecked(); });
+}
+
+PageVendors::PageVendors(ConfigWizard *parent) :
+	ConfigWizardPage(parent, _(L("Other Vendors")), _(L("Other Vendors")))
+{
+	append_text(_(L("Pick another vendor supported by Slic3r PE:")));
+
+	auto boldfont = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+	boldfont.SetWeight(wxFONTWEIGHT_BOLD);
+
+	AppConfig &appconfig_vendors = this->wizard_p()->appconfig_vendors;
+	wxArrayString choices_vendors;
+
+	for (const auto vendor_pair : wizard_p()->vendors) {
+		const auto &vendor = vendor_pair.second;
+		if (vendor.id == "PrusaResearch") { continue; }
+
+		auto *picker = new PrinterPicker(this, vendor, appconfig_vendors);
+		picker->Hide();
+		pickers.push_back(picker);
+		choices_vendors.Add(vendor.name);
+
+		picker->Bind(EVT_PRINTER_PICK, [this, &appconfig_vendors](const PrinterPickerEvent &evt) {
+			appconfig_vendors.set_variant(evt.vendor_id, evt.model_id, evt.variant_name, evt.enable);
+			this->on_variant_checked();
+		});
+	}
+
+	auto *vendor_picker = new wxChoice(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, choices_vendors);
+	if (choices_vendors.GetCount() > 0) {
+		vendor_picker->SetSelection(0);
+		on_vendor_pick(0);
+	}
+
+	vendor_picker->Bind(wxEVT_CHOICE, [this](wxCommandEvent &evt) {
+		this->on_vendor_pick(evt.GetInt());
+	});
+
+	append(vendor_picker);
+	for (PrinterPicker *picker : pickers) { this->append(picker); }
+}
+
+void PageVendors::on_page_set()
+{
+	on_variant_checked();
+}
+
+void PageVendors::on_vendor_pick(size_t i)
+{
+	for (PrinterPicker *picker : pickers) { picker->Hide(); }
+	if (i < pickers.size()) {
+		pickers[i]->Show();
+		wizard_p()->layout_fit();
+	}
+}
+
+void PageVendors::on_variant_checked()
+{
+	size_t variants_checked = 0;
+	for (const PrinterPicker *picker : pickers) { variants_checked += picker->variants_checked; }
+	enable_next(variants_checked > 0);
+}
+
+PageFirmware::PageFirmware(ConfigWizard *parent) :
+	ConfigWizardPage(parent, _(L("Firmware Type")), _(L("Firmware"))),
+	gcode_opt(print_config_def.options["gcode_flavor"]),
+	gcode_picker(nullptr)
+{
+	append_text(_(L("Choose the type of firmware used by your printer.")));
+	append_text(gcode_opt.tooltip);
+
+	wxArrayString choices;
+	choices.Alloc(gcode_opt.enum_labels.size());
+	for (const auto &label : gcode_opt.enum_labels) {
+		choices.Add(label);
+	}
+
+	gcode_picker = new wxChoice(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, choices);
+	const auto &enum_values = gcode_opt.enum_values;
+	auto needle = enum_values.cend();
+	if (gcode_opt.default_value != nullptr) {
+		needle = std::find(enum_values.cbegin(), enum_values.cend(), gcode_opt.default_value->serialize());
+	}
+	if (needle != enum_values.cend()) {
+		gcode_picker->SetSelection(needle - enum_values.cbegin());
+	} else {
+		gcode_picker->SetSelection(0);
+	}
+
+	append(gcode_picker);
+}
+
+void PageFirmware::apply_custom_config(DynamicPrintConfig &config)
+{
+	auto sel = gcode_picker->GetSelection();
+	if (sel >= 0 && sel < gcode_opt.enum_labels.size()) {
+		auto *opt = new ConfigOptionEnum<GCodeFlavor>(static_cast<GCodeFlavor>(sel));
+		config.set_key_value("gcode_flavor", opt);
+	}
+}
+
+PageBedShape::PageBedShape(ConfigWizard *parent) :
+	ConfigWizardPage(parent, _(L("Bed Shape and Size")), _(L("Bed Shape"))),
+	shape_panel(new BedShapePanel(this))
+{
+	append_text(_(L("Set the shape of your printer's bed.")));
+
+	shape_panel->build_panel(wizard_p()->custom_config->option<ConfigOptionPoints>("bed_shape"));
+	append(shape_panel);
+}
+
+void PageBedShape::apply_custom_config(DynamicPrintConfig &config)
+{
+	const auto points(shape_panel->GetValue());
+	auto *opt = new ConfigOptionPoints(points);
+	config.set_key_value("bed_shape", opt);
+}
+
+PageDiameters::PageDiameters(ConfigWizard *parent) :
+	ConfigWizardPage(parent, _(L("Filament and Nozzle Diameters")), _(L("Print Diameters"))),
+	spin_nozzle(new wxSpinCtrlDouble(this, wxID_ANY)),
+	spin_filam(new wxSpinCtrlDouble(this, wxID_ANY))
+{
+	spin_nozzle->SetDigits(2);
+	spin_nozzle->SetIncrement(0.1);
+	const auto &def_nozzle = print_config_def.options["nozzle_diameter"];
+	auto *default_nozzle = dynamic_cast<const ConfigOptionFloats*>(def_nozzle.default_value);
+	spin_nozzle->SetValue(default_nozzle != nullptr && default_nozzle->size() > 0 ? default_nozzle->get_at(0) : 0.5);
+
+	spin_filam->SetDigits(2);
+	spin_filam->SetIncrement(0.25);
+	const auto &def_filam = print_config_def.options["filament_diameter"];
+	auto *default_filam = dynamic_cast<const ConfigOptionFloats*>(def_filam.default_value);
+	spin_filam->SetValue(default_filam != nullptr && default_filam->size() > 0 ? default_filam->get_at(0) : 3.0);
+
+	append_text(_(L("Enter the diameter of your printer's hot end nozzle.")));
+
+	auto *sizer_nozzle = new wxFlexGridSizer(3, 5, 5);
+	auto *text_nozzle = new wxStaticText(this, wxID_ANY, _(L("Nozzle Diameter:")));
+	auto *unit_nozzle = new wxStaticText(this, wxID_ANY, _(L("mm")));
+	sizer_nozzle->AddGrowableCol(0, 1);
+	sizer_nozzle->Add(text_nozzle, 0, wxALIGN_CENTRE_VERTICAL);
+	sizer_nozzle->Add(spin_nozzle);
+	sizer_nozzle->Add(unit_nozzle, 0, wxALIGN_CENTRE_VERTICAL);
+	append(sizer_nozzle);
+
+	append_spacer(VERTICAL_SPACING);
+
+	append_text(_(L("Enter the diameter of your filament.")));
+	append_text(_(L("Good precision is required, so use a caliper and do multiple measurements along the filament, then compute the average.")));
+
+	auto *sizer_filam = new wxFlexGridSizer(3, 5, 5);
+	auto *text_filam = new wxStaticText(this, wxID_ANY, _(L("Filament Diameter:")));
+	auto *unit_filam = new wxStaticText(this, wxID_ANY, _(L("mm")));
+	sizer_filam->AddGrowableCol(0, 1);
+	sizer_filam->Add(text_filam, 0, wxALIGN_CENTRE_VERTICAL);
+	sizer_filam->Add(spin_filam);
+	sizer_filam->Add(unit_filam, 0, wxALIGN_CENTRE_VERTICAL);
+	append(sizer_filam);
+}
+
+void PageDiameters::apply_custom_config(DynamicPrintConfig &config)
+{
+	auto *opt_nozzle = new ConfigOptionFloats(1, spin_nozzle->GetValue());
+	config.set_key_value("nozzle_diameter", opt_nozzle);
+	auto *opt_filam = new ConfigOptionFloats(1, spin_filam->GetValue());
+	config.set_key_value("filament_diameter", opt_filam);
+}
+
+PageTemperatures::PageTemperatures(ConfigWizard *parent) :
+	ConfigWizardPage(parent, _(L("Extruder and Bed Temperatures")), _(L("Temperatures"))),
+	spin_extr(new wxSpinCtrlDouble(this, wxID_ANY)),
+	spin_bed(new wxSpinCtrlDouble(this, wxID_ANY))
+{
+	spin_extr->SetIncrement(5.0);
+	const auto &def_extr = print_config_def.options["temperature"];
+	spin_extr->SetRange(def_extr.min, def_extr.max);
+	auto *default_extr = dynamic_cast<const ConfigOptionInts*>(def_extr.default_value);
+	spin_extr->SetValue(default_extr != nullptr && default_extr->size() > 0 ? default_extr->get_at(0) : 200);
+
+	spin_bed->SetIncrement(5.0);
+	const auto &def_bed = print_config_def.options["bed_temperature"];
+	spin_bed->SetRange(def_bed.min, def_bed.max);
+	auto *default_bed = dynamic_cast<const ConfigOptionInts*>(def_bed.default_value);
+	spin_bed->SetValue(default_bed != nullptr && default_bed->size() > 0 ? default_bed->get_at(0) : 0);
+
+	append_text(_(L("Enter the temperature needed for extruding your filament.")));
+	append_text(_(L("A rule of thumb is 160 to 230 °C for PLA, and 215 to 250 °C for ABS.")));
+
+	auto *sizer_extr = new wxFlexGridSizer(3, 5, 5);
+	auto *text_extr = new wxStaticText(this, wxID_ANY, _(L("Extrusion Temperature:")));
+	auto *unit_extr = new wxStaticText(this, wxID_ANY, _(L("°C")));
+	sizer_extr->AddGrowableCol(0, 1);
+	sizer_extr->Add(text_extr, 0, wxALIGN_CENTRE_VERTICAL);
+	sizer_extr->Add(spin_extr);
+	sizer_extr->Add(unit_extr, 0, wxALIGN_CENTRE_VERTICAL);
+	append(sizer_extr);
+
+	append_spacer(VERTICAL_SPACING);
+
+	append_text(_(L("Enter the bed temperature needed for getting your filament to stick to your heated bed.")));
+	append_text(_(L("A rule of thumb is 60 °C for PLA and 110 °C for ABS. Leave zero if you have no heated bed.")));
+
+	auto *sizer_bed = new wxFlexGridSizer(3, 5, 5);
+	auto *text_bed = new wxStaticText(this, wxID_ANY, _(L("Bed Temperature:")));
+	auto *unit_bed = new wxStaticText(this, wxID_ANY, _(L("°C")));
+	sizer_bed->AddGrowableCol(0, 1);
+	sizer_bed->Add(text_bed, 0, wxALIGN_CENTRE_VERTICAL);
+	sizer_bed->Add(spin_bed);
+	sizer_bed->Add(unit_bed, 0, wxALIGN_CENTRE_VERTICAL);
+	append(sizer_bed);
+}
+
+void PageTemperatures::apply_custom_config(DynamicPrintConfig &config)
+{
+	auto *opt_extr = new ConfigOptionInts(1, spin_extr->GetValue());
+	config.set_key_value("temperature", opt_extr);
+	auto *opt_extr1st = new ConfigOptionInts(1, spin_extr->GetValue());
+	config.set_key_value("first_layer_temperature", opt_extr1st);
+	auto *opt_bed = new ConfigOptionInts(1, spin_bed->GetValue());
+	config.set_key_value("bed_temperature", opt_bed);
+	auto *opt_bed1st = new ConfigOptionInts(1, spin_bed->GetValue());
+	config.set_key_value("first_layer_bed_temperature", opt_bed1st);
+}
+
+
+// Index
+
+ConfigWizardIndex::ConfigWizardIndex(wxWindow *parent) :
+	wxPanel(parent),
+	bg(GUI::from_u8(Slic3r::var("Slic3r_192px_transparent.png")), wxBITMAP_TYPE_PNG),
+	bullet_black(GUI::from_u8(Slic3r::var("bullet_black.png")), wxBITMAP_TYPE_PNG),
+	bullet_blue(GUI::from_u8(Slic3r::var("bullet_blue.png")), wxBITMAP_TYPE_PNG),
+	bullet_white(GUI::from_u8(Slic3r::var("bullet_white.png")), wxBITMAP_TYPE_PNG)
+{
+	SetMinSize(bg.GetSize());
+
+	wxClientDC dc(this);
+	text_height = dc.GetCharHeight();
+
+	// Add logo bitmap.
+	// This could be done in on_paint() along with the index labels, but I've found it tricky
+	// to get the bitmap rendered well on all platforms with transparent background.
+	// In some cases it didn't work at all. And so wxStaticBitmap is used here instead,
+	// because it has all the platform quirks figured out.
+	auto *sizer = new wxBoxSizer(wxVERTICAL);
+	auto *logo = new wxStaticBitmap(this, wxID_ANY, bg);
+	sizer->AddStretchSpacer();
+	sizer->Add(logo);
+	SetSizer(sizer);
+
+	Bind(wxEVT_PAINT, &ConfigWizardIndex::on_paint, this);
+}
+
+void ConfigWizardIndex::load_items(ConfigWizardPage *firstpage)
+{
+	items.clear();
+	item_active = items.cend();
+
+	for (auto *page = firstpage; page != nullptr; page = page->page_next()) {
+		items.emplace_back(page->shortname);
+	}
+
+	Refresh();
+}
+
+void ConfigWizardIndex::set_active(ConfigWizardPage *page)
+{
+	item_active = std::find(items.cbegin(), items.cend(), page->shortname);
+	Refresh();
+}
+
+void ConfigWizardIndex::on_paint(wxPaintEvent & evt)
+{
+	enum {
+		MARGIN = 10,
+		SPACING = 5,
+	};
+
+	const auto size = GetClientSize();
+	if (size.GetHeight() == 0 || size.GetWidth() == 0) { return; }
+
+	wxPaintDC dc(this);
+
+	const auto bullet_w = bullet_black.GetSize().GetWidth();
+	const auto bullet_h = bullet_black.GetSize().GetHeight();
+	const int yoff_icon = bullet_h < text_height ? (text_height - bullet_h) / 2 : 0;
+	const int yoff_text = bullet_h > text_height ? (bullet_h - text_height) / 2 : 0;
+	const int yinc = std::max(bullet_h, text_height) + SPACING;
+
+	unsigned y = 0;
+	for (auto it = items.cbegin(); it != items.cend(); ++it) {
+		if (it < item_active)  { dc.DrawBitmap(bullet_black, MARGIN, y + yoff_icon, false); }
+		if (it == item_active) { dc.DrawBitmap(bullet_blue,  MARGIN, y + yoff_icon, false); }
+		if (it > item_active)  { dc.DrawBitmap(bullet_white, MARGIN, y + yoff_icon, false); }
+		dc.DrawText(*it, MARGIN + bullet_w + SPACING, y + yoff_text);
+		y += yinc;
+	}
+}
+
+
+
+// priv
+
+static const std::unordered_map<std::string, std::pair<std::string, std::string>> legacy_preset_map {{
+	{ "Original Prusa i3 MK2.ini",                           std::make_pair("MK2S", "0.4") },
+	{ "Original Prusa i3 MK2 MM Single Mode.ini",            std::make_pair("MK2SMM", "0.4") },
+	{ "Original Prusa i3 MK2 MM Single Mode 0.6 nozzle.ini", std::make_pair("MK2SMM", "0.6") },
+	{ "Original Prusa i3 MK2 MultiMaterial.ini",             std::make_pair("MK2SMM", "0.4") },
+	{ "Original Prusa i3 MK2 MultiMaterial 0.6 nozzle.ini",  std::make_pair("MK2SMM", "0.6") },
+	{ "Original Prusa i3 MK2 0.25 nozzle.ini",               std::make_pair("MK2S", "0.25") },
+	{ "Original Prusa i3 MK2 0.6 nozzle.ini",                std::make_pair("MK2S", "0.6") },
+	{ "Original Prusa i3 MK3.ini",                           std::make_pair("MK3",  "0.4") },
+}};
+
+void ConfigWizard::priv::load_vendors()
+{
+	const auto vendor_dir = fs::path(Slic3r::data_dir()) / "vendor";
+	const auto rsrc_vendor_dir = fs::path(resources_dir()) / "profiles";
+
+	// Load vendors from the "vendors" directory in datadir
+	for (fs::directory_iterator it(vendor_dir); it != fs::directory_iterator(); ++it) {
+		if (it->path().extension() == ".ini") {
+			try {
+				auto vp = VendorProfile::from_ini(it->path());
+				vendors[vp.id] = std::move(vp);
+			}
+			catch (const std::exception& e) {
+				BOOST_LOG_TRIVIAL(error) << boost::format("Error loading vendor bundle %1%: %2%") % it->path() % e.what();
+			}
+
+		}
+	}
+
+	// Additionally load up vendors from the application resources directory, but only those not seen in the datadir
+	for (fs::directory_iterator it(rsrc_vendor_dir); it != fs::directory_iterator(); ++it) {
+		if (it->path().extension() == ".ini") {
+			const auto id = it->path().stem().string();
+			if (vendors.find(id) == vendors.end()) {
+				try {
+					auto vp = VendorProfile::from_ini(it->path());
+					vendors_rsrc[vp.id] = it->path().filename().string();
+					vendors[vp.id] = std::move(vp);
+				}
+				catch (const std::exception& e) {
+					BOOST_LOG_TRIVIAL(error) << boost::format("Error loading vendor bundle %1%: %2%") % it->path() % e.what();
+				}
+			}
+		}
+	}
+
+	// Load up the set of vendors / models / variants the user has had enabled up till now
+	const AppConfig *app_config = GUI::get_app_config();
+	if (! app_config->legacy_datadir()) {
+		appconfig_vendors.set_vendors(*app_config);
+	} else {
+		// In case of legacy datadir, try to guess the preference based on the printer preset files that are present
+		const auto printer_dir = fs::path(Slic3r::data_dir()) / "printer";
+		for (fs::directory_iterator it(printer_dir); it != fs::directory_iterator(); ++it) {
+			auto needle = legacy_preset_map.find(it->path().filename().string());
+			if (needle == legacy_preset_map.end()) { continue; }
+
+			const auto &model = needle->second.first;
+			const auto &variant = needle->second.second;
+			appconfig_vendors.set_variant("PrusaResearch", model, variant, true);
+		}
+	}
+}
+
+void ConfigWizard::priv::index_refresh()
+{
+	index->load_items(page_welcome);
+}
+
+void ConfigWizard::priv::add_page(ConfigWizardPage *page)
+{
+	hscroll_sizer->Add(page, 0, wxEXPAND);
+
+	auto *extra_buttons = page->extra_buttons();
+	if (extra_buttons != nullptr) {
+		btnsizer->Prepend(extra_buttons, 0);
+	}
+}
+
+void ConfigWizard::priv::set_page(ConfigWizardPage *page)
+{
+	if (page == nullptr) { return; }
+	if (page_current != nullptr) { page_current->Hide(); }
+	page_current = page;
+	enable_next(true);
+
+	page->on_page_set();
+	index->load_items(page_welcome);
+	index->set_active(page);
+	page->Show();
+
+	btn_prev->Enable(page->page_prev() != nullptr);
+	btn_next->Show(page->page_next() != nullptr);
+	btn_finish->Show(page->page_next() == nullptr);
+
+	layout_fit();
+}
+
+void ConfigWizard::priv::layout_fit()
+{
+	q->Layout();
+	q->Fit();
+}
+
+void ConfigWizard::priv::enable_next(bool enable)
+{
+	btn_next->Enable(enable);
+	btn_finish->Enable(enable);
+}
+
+void ConfigWizard::priv::on_other_vendors()
+{
+	page_welcome
+		->chain(page_vendors)
+		->chain(page_update);
+	set_page(page_vendors);
+}
+
+void ConfigWizard::priv::on_custom_setup()
+{
+	page_welcome->chain(page_firmware);
+	page_temps->chain(page_update);
+	set_page(page_firmware);
+}
+
+void ConfigWizard::priv::apply_config(AppConfig *app_config, PresetBundle *preset_bundle, const PresetUpdater *updater)
+{
+	const bool is_custom_setup = page_welcome->page_next() == page_firmware;
+
+	if (! is_custom_setup) {
+		const auto enabled_vendors = appconfig_vendors.vendors();
+
+		// Install bundles from resources if needed:
+		std::vector<std::string> install_bundles;
+		for (const auto &vendor_rsrc : vendors_rsrc) {
+			const auto vendor = enabled_vendors.find(vendor_rsrc.first);
+			if (vendor == enabled_vendors.end()) { continue; }
+
+			size_t size_sum = 0;
+			for (const auto &model : vendor->second) { size_sum += model.second.size(); }
+			if (size_sum == 0) { continue; }
+
+			// This vendor needs to be installed
+			install_bundles.emplace_back(vendor_rsrc.second);
+		}
+
+		// Decide whether to create snapshot based on run_reason and the reset profile checkbox
+		bool snapshot = true;
+		switch (run_reason) {
+			case ConfigWizard::RR_DATA_EMPTY:    snapshot = false; break;
+			case ConfigWizard::RR_DATA_LEGACY:   snapshot = true; break;
+			case ConfigWizard::RR_DATA_INCOMPAT: snapshot = false; break;      // In this case snapshot is done by PresetUpdater with the appropriate reason
+			case ConfigWizard::RR_USER:          snapshot = page_welcome->reset_user_profile(); break;
+		}
+		if (install_bundles.size() > 0) {
+			// Install bundles from resources.
+			updater->install_bundles_rsrc(std::move(install_bundles), snapshot);
+		} else {
+			BOOST_LOG_TRIVIAL(info) << "No bundles need to be installed from resources";
+		}
+
+		if (page_welcome->reset_user_profile()) {
+			BOOST_LOG_TRIVIAL(info) << "Resetting user profiles...";
+			preset_bundle->reset(true);
+		}
+
+		app_config->set_vendors(appconfig_vendors);
+		app_config->set("version_check", page_update->version_check ? "1" : "0");
+		app_config->set("preset_update", page_update->preset_update ? "1" : "0");
+		app_config->reset_selections();
+		preset_bundle->load_presets(*app_config);
+	} else {
+		for (ConfigWizardPage *page = page_firmware; page != nullptr; page = page->page_next()) {
+			page->apply_custom_config(*custom_config);
+		}
+		preset_bundle->load_config("My Settings", *custom_config);
+	}
+	// Update the selections from the compatibilty.
+	preset_bundle->export_selections(*app_config);
+}
+
+// Public
+
+ConfigWizard::ConfigWizard(wxWindow *parent, RunReason reason) :
+	wxDialog(parent, wxID_ANY, name(), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER),
+	p(new priv(this))
+{
+	p->run_reason = reason;
+
+	p->load_vendors();
+	p->custom_config.reset(DynamicPrintConfig::new_from_defaults_keys({
+		"gcode_flavor", "bed_shape", "nozzle_diameter", "filament_diameter", "temperature", "bed_temperature",
+	}));
+
+	p->index = new ConfigWizardIndex(this);
+
+	auto *vsizer = new wxBoxSizer(wxVERTICAL);
+	auto *topsizer = new wxBoxSizer(wxHORIZONTAL);
+	auto *hline = new wxStaticLine(this);
+	p->btnsizer = new wxBoxSizer(wxHORIZONTAL);
+
+	// Initially we _do not_ SetScrollRate in order to figure out the overall width of the Wizard  without scrolling.
+	// Later, we compare that to the size of the current screen and set minimum width based on that (see below).
+	p->hscroll = new wxScrolledWindow(this);
+	p->hscroll_sizer = new wxBoxSizer(wxHORIZONTAL);
+	p->hscroll->SetSizer(p->hscroll_sizer);
+
+	topsizer->Add(p->index, 0, wxEXPAND);
+	topsizer->AddSpacer(INDEX_MARGIN);
+	topsizer->Add(p->hscroll, 1, wxEXPAND);
+
+	p->btn_prev = new wxButton(this, wxID_NONE, _(L("< &Back")));
+	p->btn_next = new wxButton(this, wxID_NONE, _(L("&Next >")));
+	p->btn_finish = new wxButton(this, wxID_APPLY, _(L("&Finish")));
+	p->btn_cancel = new wxButton(this, wxID_CANCEL);
+	p->btnsizer->AddStretchSpacer();
+	p->btnsizer->Add(p->btn_prev, 0, wxLEFT, BTN_SPACING);
+	p->btnsizer->Add(p->btn_next, 0, wxLEFT, BTN_SPACING);
+	p->btnsizer->Add(p->btn_finish, 0, wxLEFT, BTN_SPACING);
+	p->btnsizer->Add(p->btn_cancel, 0, wxLEFT, BTN_SPACING);
+
+	p->add_page(p->page_welcome  = new PageWelcome(this, reason == RR_DATA_EMPTY || reason == RR_DATA_LEGACY));
+	p->add_page(p->page_update   = new PageUpdate(this));
+	p->add_page(p->page_vendors  = new PageVendors(this));
+	p->add_page(p->page_firmware = new PageFirmware(this));
+	p->add_page(p->page_bed      = new PageBedShape(this));
+	p->add_page(p->page_diams    = new PageDiameters(this));
+	p->add_page(p->page_temps    = new PageTemperatures(this));
+	p->index_refresh();
+
+	p->page_welcome->chain(p->page_update);
+	p->page_firmware
+		->chain(p->page_bed)
+		->chain(p->page_diams)
+		->chain(p->page_temps);
+
+	vsizer->Add(topsizer, 1, wxEXPAND | wxALL, DIALOG_MARGIN);
+	vsizer->Add(hline, 0, wxEXPAND);
+	vsizer->Add(p->btnsizer, 0, wxEXPAND | wxALL, DIALOG_MARGIN);
+
+	p->set_page(p->page_welcome);
+	SetSizer(vsizer);
+	SetSizerAndFit(vsizer);
+
+	// We can now enable scrolling on hscroll
+	p->hscroll->SetScrollRate(30, 30);
+	// Compare current ("ideal") wizard size with the size of the current screen.
+	// If the screen is smaller, resize wizrad to match, which will enable scrollbars.
+	auto wizard_size = GetSize();
+	unsigned width, height;
+	if (GUI::get_current_screen_size(this, width, height)) {
+		wizard_size.SetWidth(std::min(wizard_size.GetWidth(), (int)(width - 2 * DIALOG_MARGIN)));
+		wizard_size.SetHeight(std::min(wizard_size.GetHeight(), (int)(height - 2 * DIALOG_MARGIN)));
+		SetMinSize(wizard_size);
+	}
+	Fit();
+
+	p->btn_prev->Bind(wxEVT_BUTTON, [this](const wxCommandEvent &evt) { this->p->go_prev(); });
+	p->btn_next->Bind(wxEVT_BUTTON, [this](const wxCommandEvent &evt) { this->p->go_next(); });
+	p->btn_finish->Bind(wxEVT_BUTTON, [this](const wxCommandEvent &evt) { this->EndModal(wxID_OK); });
+}
+
+ConfigWizard::~ConfigWizard() {}
+
+bool ConfigWizard::run(PresetBundle *preset_bundle, const PresetUpdater *updater)
+{
+	BOOST_LOG_TRIVIAL(info) << "Running ConfigWizard, reason: " << p->run_reason;
+	if (ShowModal() == wxID_OK) {
+		auto *app_config = GUI::get_app_config();
+		p->apply_config(app_config, preset_bundle, updater);
+		app_config->set_legacy_datadir(false);
+		BOOST_LOG_TRIVIAL(info) << "ConfigWizard applied";
+		return true;
+	} else {
+		BOOST_LOG_TRIVIAL(info) << "ConfigWizard cancelled";
+		return false;
+	}
+}
+
+
+const wxString& ConfigWizard::name()
+{
+	// A different naming convention is used for the Wizard on Windows vs. OSX & GTK.
+#if WIN32
+	static const wxString config_wizard_name = L("Configuration Wizard");
+#else
+	static const wxString config_wizard_name = L("Configuration Assistant");
+#endif
+	return config_wizard_name;
+}
+
+}
+}

src/slic3r/GUI/ConfigWizard.hpp

@@ -0,0 +1,50 @@
+#ifndef slic3r_ConfigWizard_hpp_
+#define slic3r_ConfigWizard_hpp_
+
+#include <memory>
+
+#include <wx/dialog.h>
+
+namespace Slic3r {
+
+class PresetBundle;
+class PresetUpdater;
+
+namespace GUI {
+
+
+class ConfigWizard: public wxDialog
+{
+public:
+	// Why is the Wizard run
+	enum RunReason {
+		RR_DATA_EMPTY,                  // No or empty datadir
+		RR_DATA_LEGACY,                 // Pre-updating datadir
+		RR_DATA_INCOMPAT,               // Incompatible datadir - Slic3r downgrade situation
+		RR_USER,                        // User requested the Wizard from the menus
+	};
+
+	ConfigWizard(wxWindow *parent, RunReason run_reason);
+	ConfigWizard(ConfigWizard &&) = delete;
+	ConfigWizard(const ConfigWizard &) = delete;
+	ConfigWizard &operator=(ConfigWizard &&) = delete;
+	ConfigWizard &operator=(const ConfigWizard &) = delete;
+	~ConfigWizard();
+
+	// Run the Wizard. Return whether it was completed.
+	bool run(PresetBundle *preset_bundle, const PresetUpdater *updater);
+
+	static const wxString& name();
+private:
+	struct priv;
+	std::unique_ptr<priv> p;
+
+	friend class ConfigWizardPage;
+};
+
+
+
+}
+}
+
+#endif

src/slic3r/GUI/ConfigWizard_private.hpp

@@ -0,0 +1,241 @@
+#ifndef slic3r_ConfigWizard_private_hpp_
+#define slic3r_ConfigWizard_private_hpp_
+
+#include "ConfigWizard.hpp"
+
+#include <vector>
+#include <set>
+#include <unordered_map>
+#include <boost/filesystem.hpp>
+
+#include <wx/sizer.h>
+#include <wx/panel.h>
+#include <wx/button.h>
+#include <wx/choice.h>
+#include <wx/spinctrl.h>
+
+#include "libslic3r/PrintConfig.hpp"
+#include "slic3r/Utils/PresetUpdater.hpp"
+#include "AppConfig.hpp"
+#include "Preset.hpp"
+#include "BedShapeDialog.hpp"
+
+namespace fs = boost::filesystem;
+
+namespace Slic3r {
+namespace GUI {
+
+enum {
+	WRAP_WIDTH = 500,
+	MODEL_MIN_WRAP = 150,
+
+	DIALOG_MARGIN = 15,
+	INDEX_MARGIN = 40,
+	BTN_SPACING = 10,
+	INDENT_SPACING = 30,
+	VERTICAL_SPACING = 10,
+};
+
+struct PrinterPicker: wxPanel
+{
+	struct Checkbox : wxCheckBox
+	{
+		Checkbox(wxWindow *parent, const wxString &label, const std::string &model, const std::string &variant) :
+			wxCheckBox(parent, wxID_ANY, label),
+			model(model),
+			variant(variant)
+		{}
+
+		std::string model;
+		std::string variant;
+	};
+
+	const std::string vendor_id;
+	std::vector<Checkbox*> cboxes;
+	unsigned variants_checked;
+
+	PrinterPicker(wxWindow *parent, const VendorProfile &vendor, const AppConfig &appconfig_vendors);
+
+	void select_all(bool select);
+	void select_one(size_t i, bool select);
+	void on_checkbox(const Checkbox *cbox, bool checked);
+};
+
+struct ConfigWizardPage: wxPanel
+{
+	ConfigWizard *parent;
+	const wxString shortname;
+	wxBoxSizer *content;
+
+	ConfigWizardPage(ConfigWizard *parent, wxString title, wxString shortname);
+
+	virtual ~ConfigWizardPage();
+
+	ConfigWizardPage* page_prev() const { return p_prev; }
+	ConfigWizardPage* page_next() const { return p_next; }
+	ConfigWizardPage* chain(ConfigWizardPage *page);
+
+	template<class T>
+	void append(T *thing, int proportion = 0, int flag = wxEXPAND|wxTOP|wxBOTTOM, int border = 10)
+	{
+		content->Add(thing, proportion, flag, border);
+	}
+
+	void append_text(wxString text);
+	void append_spacer(int space);
+
+	ConfigWizard::priv *wizard_p() const { return parent->p.get(); }
+
+	virtual bool Show(bool show = true);
+	virtual bool Hide() { return Show(false); }
+	virtual wxPanel* extra_buttons() { return nullptr; }
+	virtual void on_page_set() {}
+	virtual void apply_custom_config(DynamicPrintConfig &config) {}
+
+	void enable_next(bool enable);
+private:
+	ConfigWizardPage *p_prev;
+	ConfigWizardPage *p_next;
+};
+
+struct PageWelcome: ConfigWizardPage
+{
+	PrinterPicker *printer_picker;
+	wxPanel *others_buttons;
+	wxCheckBox *cbox_reset;
+
+	PageWelcome(ConfigWizard *parent, bool check_first_variant);
+
+	virtual wxPanel* extra_buttons() { return others_buttons; }
+	virtual void on_page_set();
+
+	bool reset_user_profile() const { return cbox_reset != nullptr ? cbox_reset->GetValue() : false; }
+	void on_variant_checked();
+};
+
+struct PageUpdate: ConfigWizardPage
+{
+	bool version_check;
+	bool preset_update;
+
+	PageUpdate(ConfigWizard *parent);
+};
+
+struct PageVendors: ConfigWizardPage
+{
+	std::vector<PrinterPicker*> pickers;
+
+	PageVendors(ConfigWizard *parent);
+
+	virtual void on_page_set();
+
+	void on_vendor_pick(size_t i);
+	void on_variant_checked();
+};
+
+struct PageFirmware: ConfigWizardPage
+{
+	const ConfigOptionDef &gcode_opt;
+	wxChoice *gcode_picker;
+
+	PageFirmware(ConfigWizard *parent);
+	virtual void apply_custom_config(DynamicPrintConfig &config);
+};
+
+struct PageBedShape: ConfigWizardPage
+{
+	BedShapePanel *shape_panel;
+
+	PageBedShape(ConfigWizard *parent);
+	virtual void apply_custom_config(DynamicPrintConfig &config);
+};
+
+struct PageDiameters: ConfigWizardPage
+{
+	wxSpinCtrlDouble *spin_nozzle;
+	wxSpinCtrlDouble *spin_filam;
+
+	PageDiameters(ConfigWizard *parent);
+	virtual void apply_custom_config(DynamicPrintConfig &config);
+};
+
+struct PageTemperatures: ConfigWizardPage
+{
+	wxSpinCtrlDouble *spin_extr;
+	wxSpinCtrlDouble *spin_bed;
+
+	PageTemperatures(ConfigWizard *parent);
+	virtual void apply_custom_config(DynamicPrintConfig &config);
+};
+
+
+class ConfigWizardIndex: public wxPanel
+{
+public:
+	ConfigWizardIndex(wxWindow *parent);
+
+	void load_items(ConfigWizardPage *firstpage);
+	void set_active(ConfigWizardPage *page);
+private:
+	const wxBitmap bg;
+	const wxBitmap bullet_black;
+	const wxBitmap bullet_blue;
+	const wxBitmap bullet_white;
+	int text_height;
+
+	std::vector<wxString> items;
+	std::vector<wxString>::const_iterator item_active;
+
+	void on_paint(wxPaintEvent &evt);
+};
+
+struct ConfigWizard::priv
+{
+	ConfigWizard *q;
+	ConfigWizard::RunReason run_reason;
+	AppConfig appconfig_vendors;
+	std::unordered_map<std::string, VendorProfile> vendors;
+	std::unordered_map<std::string, std::string> vendors_rsrc;
+	std::unique_ptr<DynamicPrintConfig> custom_config;
+
+	wxScrolledWindow *hscroll = nullptr;
+	wxBoxSizer *hscroll_sizer = nullptr;
+	wxBoxSizer *btnsizer = nullptr;
+	ConfigWizardPage *page_current = nullptr;
+	ConfigWizardIndex *index = nullptr;
+	wxButton *btn_prev = nullptr;
+	wxButton *btn_next = nullptr;
+	wxButton *btn_finish = nullptr;
+	wxButton *btn_cancel = nullptr;
+
+	PageWelcome      *page_welcome = nullptr;
+	PageUpdate       *page_update = nullptr;
+	PageVendors      *page_vendors = nullptr;
+	PageFirmware     *page_firmware = nullptr;
+	PageBedShape     *page_bed = nullptr;
+	PageDiameters    *page_diams = nullptr;
+	PageTemperatures *page_temps = nullptr;
+
+	priv(ConfigWizard *q) : q(q) {}
+
+	void load_vendors();
+	void add_page(ConfigWizardPage *page);
+	void index_refresh();
+	void set_page(ConfigWizardPage *page);
+	void layout_fit();
+	void go_prev() { if (page_current != nullptr) { set_page(page_current->page_prev()); } }
+	void go_next() { if (page_current != nullptr) { set_page(page_current->page_next()); } }
+	void enable_next(bool enable);
+
+	void on_other_vendors();
+	void on_custom_setup();
+
+	void apply_config(AppConfig *app_config, PresetBundle *preset_bundle, const PresetUpdater *updater);
+};
+
+
+
+}
+}
+
+#endif

src/slic3r/GUI/Field.cpp

@@ -0,0 +1,784 @@
+#include "GUI.hpp"//"slic3r_gui.hpp"
+#include "Field.hpp"
+
+//#include <wx/event.h>
+#include <regex>
+#include <wx/numformatter.h>
+#include <wx/tooltip.h>
+#include "PrintConfig.hpp"
+#include <boost/algorithm/string/predicate.hpp>
+
+namespace Slic3r { namespace GUI {
+
+	wxString double_to_string(double const value)
+	{
+		if (value - int(value) == 0)
+			return wxString::Format(_T("%i"), int(value));
+		else {
+			int precision = 4;
+			for (size_t p = 1; p < 4; p++)
+			{
+				double cur_val = pow(10, p)*value;
+				if (cur_val - int(cur_val) == 0) {
+					precision = p;
+					break;
+				}
+			}
+			return wxNumberFormatter::ToString(value, precision, wxNumberFormatter::Style_None);
+		}
+	}
+
+	void Field::PostInitialize(){
+		auto color = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
+		m_Undo_btn			= new MyButton(m_parent, wxID_ANY, "", wxDefaultPosition,wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
+		m_Undo_to_sys_btn	= new MyButton(m_parent, wxID_ANY, "", wxDefaultPosition,wxDefaultSize, wxBU_EXACTFIT | wxNO_BORDER);
+		if (wxMSW) {
+			m_Undo_btn->SetBackgroundColour(color);
+			m_Undo_to_sys_btn->SetBackgroundColour(color);
+		}
+		m_Undo_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent){ on_back_to_initial_value(); }));
+		m_Undo_to_sys_btn->Bind(wxEVT_BUTTON, ([this](wxCommandEvent){ on_back_to_sys_value(); }));
+
+		//set default bitmap
+		wxBitmap bmp;
+		bmp.LoadFile(from_u8(var("bullet_white.png")), wxBITMAP_TYPE_PNG);
+		set_undo_bitmap(&bmp);
+		set_undo_to_sys_bitmap(&bmp);
+
+		switch (m_opt.type)
+		{
+		case coPercents:
+		case coFloats:
+		case coStrings:	
+		case coBools:		
+		case coInts: {
+			auto tag_pos = m_opt_id.find("#");
+			if (tag_pos != std::string::npos)
+				m_opt_idx = stoi(m_opt_id.substr(tag_pos + 1, m_opt_id.size()));
+			break;
+		}
+		default:
+			break;
+		}
+
+		BUILD();
+	}
+
+	void Field::on_kill_focus(wxEvent& event) {
+        // Without this, there will be nasty focus bugs on Windows.
+        // Also, docs for wxEvent::Skip() say "In general, it is recommended to skip all 
+        // non-command events to allow the default handling to take place."
+		event.Skip();
+		// call the registered function if it is available
+        if (m_on_kill_focus!=nullptr) 
+            m_on_kill_focus();
+    }
+    void Field::on_change_field()
+	{
+//        std::cerr << "calling Field::_on_change \n";
+        if (m_on_change != nullptr  && !m_disable_change_event)
+            m_on_change(m_opt_id, get_value());
+    }
+
+	void Field::on_back_to_initial_value(){
+		if (m_back_to_initial_value != nullptr && m_is_modified_value)
+			m_back_to_initial_value(m_opt_id);
+	}
+
+	void Field::on_back_to_sys_value(){
+		if (m_back_to_sys_value != nullptr && m_is_nonsys_value)
+			m_back_to_sys_value(m_opt_id);
+	}
+
+	wxString Field::get_tooltip_text(const wxString& default_string)
+	{
+		wxString tooltip_text("");
+		wxString tooltip = _(m_opt.tooltip);
+		if (tooltip.length() > 0)
+            tooltip_text = tooltip + "\n" + _(L("default value")) + "\t: " +
+            (boost::iends_with(m_opt_id, "_gcode") ? "\n" : "") + default_string +
+            (boost::iends_with(m_opt_id, "_gcode") ? "" : "\n") + 
+            _(L("parameter name")) + "\t: " + m_opt_id;
+
+		return tooltip_text;
+	}
+
+	bool Field::is_matched(const std::string& string, const std::string& pattern)
+	{
+		std::regex regex_pattern(pattern, std::regex_constants::icase); // use ::icase to make the matching case insensitive like /i in perl
+		return std::regex_match(string, regex_pattern);
+	}
+
+	void Field::get_value_by_opt_type(wxString& str)
+	{
+		switch (m_opt.type){
+		case coInt:
+			m_value = wxAtoi(str);
+			break;
+		case coPercent:
+		case coPercents:
+		case coFloats:
+		case coFloat:{
+			if (m_opt.type == coPercent && str.Last() == '%') 
+				str.RemoveLast();
+			else if (str.Last() == '%')	{
+				wxString label = m_Label->GetLabel();
+				if		(label.Last() == '\n')	label.RemoveLast();
+				while	(label.Last() == ' ')	label.RemoveLast();
+				if		(label.Last() == ':')	label.RemoveLast();
+				show_error(m_parent, wxString::Format(_(L("%s doesn't support percentage")), label));
+				set_value(double_to_string(m_opt.min), true);
+				m_value = double(m_opt.min);
+				break;
+			}
+			double val;
+			if(!str.ToCDouble(&val))
+			{
+				show_error(m_parent, _(L("Input value contains incorrect symbol(s).\nUse, please, only digits")));
+				set_value(double_to_string(val), true);
+			}
+			if (m_opt.min > val || val > m_opt.max)
+			{
+				show_error(m_parent, _(L("Input value is out of range")));
+				if (m_opt.min > val) val = m_opt.min;
+				if (val > m_opt.max) val = m_opt.max;
+				set_value(double_to_string(val), true);
+			}
+			m_value = val;
+			break; }
+		case coString:
+		case coStrings:
+		case coFloatOrPercent:
+			m_value = str.ToStdString();
+			break;
+		default:
+			break;
+		}
+	}
+
+	void TextCtrl::BUILD() {
+        auto size = wxSize(wxDefaultSize);
+        if (m_opt.height >= 0) size.SetHeight(m_opt.height);
+        if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+
+		wxString text_value = wxString(""); 
+
+		switch (m_opt.type) {
+		case coFloatOrPercent:
+		{
+			text_value = double_to_string(m_opt.default_value->getFloat());
+ 			if (static_cast<const ConfigOptionFloatOrPercent*>(m_opt.default_value)->percent)
+ 				text_value += "%";
+			break;
+		}
+		case coPercent:
+		{
+			text_value = wxString::Format(_T("%i"), int(m_opt.default_value->getFloat()));
+			text_value += "%";
+			break;
+		}	
+		case coPercents:
+		case coFloats:
+		case coFloat:
+		{
+			double val = m_opt.type == coFloats ?
+				static_cast<const ConfigOptionFloats*>(m_opt.default_value)->get_at(m_opt_idx) :
+				m_opt.type == coFloat ? 
+					m_opt.default_value->getFloat() :
+					static_cast<const ConfigOptionPercents*>(m_opt.default_value)->get_at(m_opt_idx);
+			text_value = double_to_string(val);
+			break;
+		}
+		case coString:			
+			text_value = static_cast<const ConfigOptionString*>(m_opt.default_value)->value;
+			break;
+		case coStrings:
+		{
+			const ConfigOptionStrings *vec = static_cast<const ConfigOptionStrings*>(m_opt.default_value);
+			if (vec == nullptr || vec->empty()) break; //for the case of empty default value
+			text_value = vec->get_at(m_opt_idx);
+			break;
+		}
+		default:
+			break; 
+		}
+
+		auto temp = new wxTextCtrl(m_parent, wxID_ANY, text_value, wxDefaultPosition, size, (m_opt.multiline ? wxTE_MULTILINE : 0));
+
+		temp->SetToolTip(get_tooltip_text(text_value));
+        
+		temp->Bind(wxEVT_LEFT_DOWN, ([temp](wxEvent& event)
+		{
+			//! to allow the default handling
+			event.Skip();
+			//! eliminating the g-code pop up text description
+			bool flag = false;
+#ifdef __WXGTK__
+			// I have no idea why, but on GTK flag works in other way
+			flag = true;
+#endif // __WXGTK__
+			temp->GetToolTip()->Enable(flag);
+		}), temp->GetId());
+
+#if !defined(__WXGTK__)
+		temp->Bind(wxEVT_KILL_FOCUS, ([this, temp](wxEvent& e)
+		{
+			e.Skip();//	on_kill_focus(e);
+			temp->GetToolTip()->Enable(true);
+		}), temp->GetId());
+#endif // __WXGTK__
+
+		temp->Bind(wxEVT_TEXT, ([this](wxCommandEvent& evt)
+		{
+#ifdef __WXGTK__
+			if (bChangedValueEvent)
+#endif //__WXGTK__
+			on_change_field();
+		}), temp->GetId());
+
+#ifdef __WXGTK__
+        // to correct value updating on GTK we should:
+        // call on_change_field() on wxEVT_KEY_UP instead of wxEVT_TEXT
+        // and prevent value updating on wxEVT_KEY_DOWN
+        temp->Bind(wxEVT_KEY_DOWN, &TextCtrl::change_field_value, this);
+        temp->Bind(wxEVT_KEY_UP, &TextCtrl::change_field_value, this);
+#endif //__WXGTK__
+
+		// select all text using Ctrl+A
+		temp->Bind(wxEVT_CHAR, ([temp](wxKeyEvent& event)
+		{
+			if (wxGetKeyState(wxKeyCode('A')) && wxGetKeyState(WXK_CONTROL))
+				temp->SetSelection(-1, -1); //select all
+			event.Skip();
+		}));
+
+        // recast as a wxWindow to fit the calling convention
+        window = dynamic_cast<wxWindow*>(temp);
+    }	
+
+	boost::any& TextCtrl::get_value()
+	{
+		wxString ret_str = static_cast<wxTextCtrl*>(window)->GetValue();
+		get_value_by_opt_type(ret_str);
+
+		return m_value;
+	}
+
+	void TextCtrl::enable() { dynamic_cast<wxTextCtrl*>(window)->Enable(); dynamic_cast<wxTextCtrl*>(window)->SetEditable(true); }
+    void TextCtrl::disable() { dynamic_cast<wxTextCtrl*>(window)->Disable(); dynamic_cast<wxTextCtrl*>(window)->SetEditable(false); }
+
+#ifdef __WXGTK__
+    void TextCtrl::change_field_value(wxEvent& event)
+    {
+    	if (bChangedValueEvent = event.GetEventType()==wxEVT_KEY_UP)
+    		on_change_field();
+        event.Skip();
+    };
+#endif //__WXGTK__
+
+void CheckBox::BUILD() {
+	auto size = wxSize(wxDefaultSize);
+	if (m_opt.height >= 0) size.SetHeight(m_opt.height);
+	if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+
+	bool check_value =	m_opt.type == coBool ? 
+						m_opt.default_value->getBool() : m_opt.type == coBools ? 
+						static_cast<const ConfigOptionBools*>(m_opt.default_value)->get_at(m_opt_idx) : 
+    					false;
+
+	auto temp = new wxCheckBox(m_parent, wxID_ANY, wxString(""), wxDefaultPosition, size); 
+	temp->SetValue(check_value);
+	if (m_opt.readonly) temp->Disable();
+
+	temp->Bind(wxEVT_CHECKBOX, ([this](wxCommandEvent e) { on_change_field(); }), temp->GetId());
+
+	temp->SetToolTip(get_tooltip_text(check_value ? "true" : "false")); 
+
+	// recast as a wxWindow to fit the calling convention
+	window = dynamic_cast<wxWindow*>(temp);
+}
+
+boost::any& CheckBox::get_value()
+{
+// 	boost::any m_value;
+	bool value = dynamic_cast<wxCheckBox*>(window)->GetValue();
+	if (m_opt.type == coBool)
+		m_value = static_cast<bool>(value);
+	else
+		m_value = static_cast<unsigned char>(value);
+ 	return m_value;
+}
+
+int undef_spin_val = -9999;		//! Probably, It's not necessary
+
+void SpinCtrl::BUILD() {
+	auto size = wxSize(wxDefaultSize);
+	if (m_opt.height >= 0) size.SetHeight(m_opt.height);
+	if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+
+	wxString	text_value = wxString("");
+	int			default_value = 0;
+
+	switch (m_opt.type) {
+	case coInt:
+		default_value = m_opt.default_value->getInt();
+		text_value = wxString::Format(_T("%i"), default_value);
+		break;
+	case coInts:
+	{
+		const ConfigOptionInts *vec = static_cast<const ConfigOptionInts*>(m_opt.default_value);
+		if (vec == nullptr || vec->empty()) break;
+		for (size_t id = 0; id < vec->size(); ++id)
+		{
+			default_value = vec->get_at(id);
+			text_value += wxString::Format(_T("%i"), default_value);
+		}
+		break;
+	}
+	default:
+		break;
+	}
+
+    const int min_val = m_opt.min == INT_MIN ? 0: m_opt.min;
+	const int max_val = m_opt.max < 2147483647 ? m_opt.max : 2147483647;
+
+	auto temp = new wxSpinCtrl(m_parent, wxID_ANY, text_value, wxDefaultPosition, size,
+		0, min_val, max_val, default_value);
+
+// 	temp->Bind(wxEVT_SPINCTRL, ([this](wxCommandEvent e) { tmp_value = undef_spin_val; on_change_field(); }), temp->GetId());
+// 	temp->Bind(wxEVT_KILL_FOCUS, ([this](wxEvent& e) { tmp_value = undef_spin_val; on_kill_focus(e); }), temp->GetId());
+	temp->Bind(wxEVT_TEXT, ([this](wxCommandEvent e)
+	{
+// 		# On OSX / Cocoa, wxSpinCtrl::GetValue() doesn't return the new value
+// 		# when it was changed from the text control, so the on_change callback
+// 		# gets the old one, and on_kill_focus resets the control to the old value.
+// 		# As a workaround, we get the new value from $event->GetString and store
+// 		# here temporarily so that we can return it from $self->get_value
+		std::string value = e.GetString().utf8_str().data();
+		if (is_matched(value, "^\\d+$"))
+			tmp_value = std::stoi(value);
+		on_change_field();
+// 		# We don't reset tmp_value here because _on_change might put callbacks
+// 		# in the CallAfter queue, and we want the tmp value to be available from
+// 		# them as well.
+	}), temp->GetId());
+	
+	temp->SetToolTip(get_tooltip_text(text_value));
+
+	// recast as a wxWindow to fit the calling convention
+	window = dynamic_cast<wxWindow*>(temp);
+}
+
+void Choice::BUILD() {
+	auto size = wxSize(wxDefaultSize);
+	if (m_opt.height >= 0) size.SetHeight(m_opt.height);
+	if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+
+	wxComboBox* temp;	
+	if (!m_opt.gui_type.empty() && m_opt.gui_type.compare("select_open") != 0)
+		temp = new wxComboBox(m_parent, wxID_ANY, wxString(""), wxDefaultPosition, size);
+	else
+		temp = new wxComboBox(m_parent, wxID_ANY, wxString(""), wxDefaultPosition, size, 0, NULL, wxCB_READONLY);
+
+	// recast as a wxWindow to fit the calling convention
+	window = dynamic_cast<wxWindow*>(temp);
+
+	if (m_opt.enum_labels.empty() && m_opt.enum_values.empty()){
+	}
+	else{
+		for (auto el : m_opt.enum_labels.empty() ? m_opt.enum_values : m_opt.enum_labels){
+			const wxString& str = _(el);//m_opt_id == "support" ? _(el) : el;
+			temp->Append(str);
+		}
+		set_selection();
+	}
+ 	temp->Bind(wxEVT_TEXT, ([this](wxCommandEvent e) { on_change_field(); }), temp->GetId());
+ 	temp->Bind(wxEVT_COMBOBOX, ([this](wxCommandEvent e) { on_change_field(); }), temp->GetId());
+
+	temp->SetToolTip(get_tooltip_text(temp->GetValue()));
+}
+
+void Choice::set_selection()
+{
+	wxString text_value = wxString("");
+	switch (m_opt.type){
+	case coFloat:
+	case coPercent:	{
+		double val = m_opt.default_value->getFloat();
+		text_value = val - int(val) == 0 ? wxString::Format(_T("%i"), int(val)) : wxNumberFormatter::ToString(val, 1);
+		size_t idx = 0;
+		for (auto el : m_opt.enum_values)
+		{
+			if (el.compare(text_value) == 0)
+				break;
+			++idx;
+		}
+//		if (m_opt.type == coPercent) text_value += "%";
+		idx == m_opt.enum_values.size() ?
+			dynamic_cast<wxComboBox*>(window)->SetValue(text_value) :
+			dynamic_cast<wxComboBox*>(window)->SetSelection(idx);
+		break;
+	}
+	case coEnum:{
+		int id_value = static_cast<const ConfigOptionEnum<SeamPosition>*>(m_opt.default_value)->value; //!!
+		dynamic_cast<wxComboBox*>(window)->SetSelection(id_value);
+		break;
+	}
+	case coInt:{
+		int val = m_opt.default_value->getInt(); //!!
+		text_value = wxString::Format(_T("%i"), int(val));
+		size_t idx = 0;
+		for (auto el : m_opt.enum_values)
+		{
+			if (el.compare(text_value) == 0)
+				break;
+			++idx;
+		}
+		idx == m_opt.enum_values.size() ?
+			dynamic_cast<wxComboBox*>(window)->SetValue(text_value) :
+			dynamic_cast<wxComboBox*>(window)->SetSelection(idx);
+		break;
+	}
+	case coStrings:{
+		text_value = static_cast<const ConfigOptionStrings*>(m_opt.default_value)->get_at(m_opt_idx);
+
+		size_t idx = 0;
+		for (auto el : m_opt.enum_values)
+		{
+			if (el.compare(text_value) == 0)
+				break;
+			++idx;
+		}
+		idx == m_opt.enum_values.size() ?
+			dynamic_cast<wxComboBox*>(window)->SetValue(text_value) :
+			dynamic_cast<wxComboBox*>(window)->SetSelection(idx);
+		break;
+	}
+	}
+}
+
+void Choice::set_value(const std::string& value, bool change_event)  //! Redundant?
+{
+	m_disable_change_event = !change_event;
+
+	size_t idx=0;
+	for (auto el : m_opt.enum_values)
+	{
+		if (el.compare(value) == 0)
+			break;
+		++idx;
+	}
+
+	idx == m_opt.enum_values.size() ? 
+		dynamic_cast<wxComboBox*>(window)->SetValue(value) :
+		dynamic_cast<wxComboBox*>(window)->SetSelection(idx);
+	
+	m_disable_change_event = false;
+}
+
+void Choice::set_value(const boost::any& value, bool change_event)
+{
+	m_disable_change_event = !change_event;
+
+	switch (m_opt.type){
+	case coInt:
+	case coFloat:
+	case coPercent:
+	case coString:
+	case coStrings:{
+		wxString text_value;
+		if (m_opt.type == coInt) 
+			text_value = wxString::Format(_T("%i"), int(boost::any_cast<int>(value)));
+		else
+			text_value = boost::any_cast<wxString>(value);
+		auto idx = 0;
+		for (auto el : m_opt.enum_values)
+		{
+			if (el.compare(text_value) == 0)
+				break;
+			++idx;
+		}
+		idx == m_opt.enum_values.size() ?
+			dynamic_cast<wxComboBox*>(window)->SetValue(text_value) :
+			dynamic_cast<wxComboBox*>(window)->SetSelection(idx);
+		break;
+	}
+	case coEnum:{
+		int val = boost::any_cast<int>(value);
+		if (m_opt_id.compare("external_fill_pattern") == 0)
+		{
+			if (!m_opt.enum_values.empty()){
+				std::string key;
+				t_config_enum_values map_names = ConfigOptionEnum<InfillPattern>::get_enum_values();				
+				for (auto it : map_names) {
+					if (val == it.second) {
+						key = it.first;
+						break;
+					}
+				}
+
+				size_t idx = 0;
+				for (auto el : m_opt.enum_values)
+				{
+					if (el.compare(key) == 0)
+						break;
+					++idx;
+				}
+
+				val = idx == m_opt.enum_values.size() ? 0 : idx;
+			}
+			else
+				val = 0;
+		}
+		dynamic_cast<wxComboBox*>(window)->SetSelection(val);
+		break;
+	}
+	default:
+		break;
+	}
+
+	m_disable_change_event = false;
+}
+
+//! it's needed for _update_serial_ports()
+void Choice::set_values(const std::vector<std::string>& values)
+{
+	if (values.empty())
+		return;
+	m_disable_change_event = true;
+
+// 	# it looks that Clear() also clears the text field in recent wxWidgets versions,
+// 	# but we want to preserve it
+	auto ww = dynamic_cast<wxComboBox*>(window);
+	auto value = ww->GetValue();
+	ww->Clear();
+	ww->Append("");
+	for (auto el : values)
+		ww->Append(wxString(el));
+	ww->SetValue(value);
+
+	m_disable_change_event = false;
+}
+
+boost::any& Choice::get_value()
+{
+// 	boost::any m_value;
+	wxString ret_str = static_cast<wxComboBox*>(window)->GetValue();	
+
+	// options from right panel
+	std::vector <std::string> right_panel_options{ "support", "scale_unit" };
+	for (auto rp_option: right_panel_options)
+		if (m_opt_id == rp_option)
+			return m_value = boost::any(ret_str);
+
+	if (m_opt.type != coEnum)
+		/*m_value = */get_value_by_opt_type(ret_str);
+	else
+	{
+		int ret_enum = static_cast<wxComboBox*>(window)->GetSelection(); 
+		if (m_opt_id.compare("external_fill_pattern") == 0)
+		{
+			if (!m_opt.enum_values.empty()){
+				std::string key = m_opt.enum_values[ret_enum];
+				t_config_enum_values map_names = ConfigOptionEnum<InfillPattern>::get_enum_values();
+				int value = map_names.at(key);
+
+				m_value = static_cast<InfillPattern>(value);
+			}
+			else
+				m_value = static_cast<InfillPattern>(0);
+		}
+		if (m_opt_id.compare("fill_pattern") == 0)
+			m_value = static_cast<InfillPattern>(ret_enum);
+		else if (m_opt_id.compare("gcode_flavor") == 0)
+			m_value = static_cast<GCodeFlavor>(ret_enum);
+		else if (m_opt_id.compare("support_material_pattern") == 0)
+			m_value = static_cast<SupportMaterialPattern>(ret_enum);
+		else if (m_opt_id.compare("seam_position") == 0)
+			m_value = static_cast<SeamPosition>(ret_enum);
+		else if (m_opt_id.compare("host_type") == 0)
+			m_value = static_cast<PrintHostType>(ret_enum);
+	}	
+
+	return m_value;
+}
+
+void ColourPicker::BUILD()
+{
+	auto size = wxSize(wxDefaultSize);
+	if (m_opt.height >= 0) size.SetHeight(m_opt.height);
+	if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+
+	wxString clr(static_cast<const ConfigOptionStrings*>(m_opt.default_value)->get_at(m_opt_idx));
+	auto temp = new wxColourPickerCtrl(m_parent, wxID_ANY, clr, wxDefaultPosition, size);
+		
+	// 	// recast as a wxWindow to fit the calling convention
+	window = dynamic_cast<wxWindow*>(temp);
+
+	temp->Bind(wxEVT_COLOURPICKER_CHANGED, ([this](wxCommandEvent e) { on_change_field(); }), temp->GetId());
+
+	temp->SetToolTip(get_tooltip_text(clr));
+}
+
+boost::any& ColourPicker::get_value(){
+// 	boost::any m_value;
+
+	auto colour = static_cast<wxColourPickerCtrl*>(window)->GetColour();
+	auto clr_str = wxString::Format(wxT("#%02X%02X%02X"), colour.Red(), colour.Green(), colour.Blue());
+	m_value = clr_str.ToStdString();
+
+	return m_value;
+}
+
+void PointCtrl::BUILD()
+{
+	auto size = wxSize(wxDefaultSize);
+	if (m_opt.height >= 0) size.SetHeight(m_opt.height);
+	if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+
+	auto temp = new wxBoxSizer(wxHORIZONTAL);
+	// 	$self->wxSizer($sizer);
+	// 
+	wxSize field_size(40, -1);
+
+	auto default_pt = static_cast<const ConfigOptionPoints*>(m_opt.default_value)->values.at(0);
+	double val = default_pt(0);
+	wxString X = val - int(val) == 0 ? wxString::Format(_T("%i"), int(val)) : wxNumberFormatter::ToString(val, 2, wxNumberFormatter::Style_None);
+	val = default_pt(1);
+	wxString Y = val - int(val) == 0 ? wxString::Format(_T("%i"), int(val)) : wxNumberFormatter::ToString(val, 2, wxNumberFormatter::Style_None);
+
+	x_textctrl = new wxTextCtrl(m_parent, wxID_ANY, X, wxDefaultPosition, field_size);
+	y_textctrl = new wxTextCtrl(m_parent, wxID_ANY, Y, wxDefaultPosition, field_size);
+
+	temp->Add(new wxStaticText(m_parent, wxID_ANY, "x : "), 0, wxALIGN_CENTER_VERTICAL, 0);
+	temp->Add(x_textctrl);
+	temp->Add(new wxStaticText(m_parent, wxID_ANY, "   y : "), 0, wxALIGN_CENTER_VERTICAL, 0);
+	temp->Add(y_textctrl);
+
+	x_textctrl->Bind(wxEVT_TEXT, ([this](wxCommandEvent e) { on_change_field(); }), x_textctrl->GetId());
+	y_textctrl->Bind(wxEVT_TEXT, ([this](wxCommandEvent e) { on_change_field(); }), y_textctrl->GetId());
+
+	// 	// recast as a wxWindow to fit the calling convention
+	sizer = dynamic_cast<wxSizer*>(temp);
+
+	x_textctrl->SetToolTip(get_tooltip_text(X+", "+Y));
+	y_textctrl->SetToolTip(get_tooltip_text(X+", "+Y));
+}
+
+void PointCtrl::set_value(const Vec2d& value, bool change_event)
+{
+	m_disable_change_event = !change_event;
+
+	double val = value(0);
+	x_textctrl->SetValue(val - int(val) == 0 ? wxString::Format(_T("%i"), int(val)) : wxNumberFormatter::ToString(val, 2, wxNumberFormatter::Style_None));
+	val = value(1);
+	y_textctrl->SetValue(val - int(val) == 0 ? wxString::Format(_T("%i"), int(val)) : wxNumberFormatter::ToString(val, 2, wxNumberFormatter::Style_None));
+
+	m_disable_change_event = false;
+}
+
+void PointCtrl::set_value(const boost::any& value, bool change_event)
+{
+	Vec2d pt(Vec2d::Zero());
+	const Vec2d *ptf = boost::any_cast<Vec2d>(&value);
+	if (!ptf)
+	{
+		ConfigOptionPoints* pts = boost::any_cast<ConfigOptionPoints*>(value);
+		pt = pts->values.at(0);
+	}
+	else
+		pt = *ptf;
+	set_value(pt, change_event);
+}
+
+boost::any& PointCtrl::get_value()
+{
+	double x, y;
+	x_textctrl->GetValue().ToDouble(&x);
+	y_textctrl->GetValue().ToDouble(&y);
+	return m_value = Vec2d(x, y);
+}
+
+void StaticText::BUILD()
+{
+	auto size = wxSize(wxDefaultSize);
+	if (m_opt.height >= 0) size.SetHeight(m_opt.height);
+	if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+
+	wxString legend(static_cast<const ConfigOptionString*>(m_opt.default_value)->value);
+	auto temp = new wxStaticText(m_parent, wxID_ANY, legend, wxDefaultPosition, size);
+	temp->SetFont(bold_font());
+
+	// 	// recast as a wxWindow to fit the calling convention
+	window = dynamic_cast<wxWindow*>(temp);
+
+	temp->SetToolTip(get_tooltip_text(legend));
+}
+
+void SliderCtrl::BUILD()
+{
+	auto size = wxSize(wxDefaultSize);
+	if (m_opt.height >= 0) size.SetHeight(m_opt.height);
+	if (m_opt.width >= 0) size.SetWidth(m_opt.width);
+
+	auto temp = new wxBoxSizer(wxHORIZONTAL);
+
+	auto def_val = static_cast<const ConfigOptionInt*>(m_opt.default_value)->value;
+	auto min = m_opt.min == INT_MIN ? 0 : m_opt.min;
+	auto max = m_opt.max == INT_MAX ? 100 : m_opt.max;
+
+	m_slider = new wxSlider(m_parent, wxID_ANY, def_val * m_scale,
+							min * m_scale, max * m_scale,
+							wxDefaultPosition, size);
+ 	wxSize field_size(40, -1);
+
+	m_textctrl = new wxTextCtrl(m_parent, wxID_ANY, wxString::Format("%d", m_slider->GetValue()/m_scale), 
+								wxDefaultPosition, field_size);
+
+	temp->Add(m_slider, 1, wxEXPAND | wxALIGN_CENTER_VERTICAL, 0);
+	temp->Add(m_textctrl, 0, wxALIGN_CENTER_VERTICAL, 0);
+
+	m_slider->Bind(wxEVT_SLIDER, ([this](wxCommandEvent e) {
+		if (!m_disable_change_event){
+			int val = boost::any_cast<int>(get_value());
+			m_textctrl->SetLabel(wxString::Format("%d", val));
+			on_change_field();
+		}
+	}), m_slider->GetId());
+
+	m_textctrl->Bind(wxEVT_TEXT, ([this](wxCommandEvent e) {
+		std::string value = e.GetString().utf8_str().data();
+		if (is_matched(value, "^-?\\d+(\\.\\d*)?$")){
+			m_disable_change_event = true;
+			m_slider->SetValue(stoi(value)*m_scale);
+			m_disable_change_event = false;
+			on_change_field();
+		}
+	}), m_textctrl->GetId());
+
+	m_sizer = dynamic_cast<wxSizer*>(temp);
+}
+
+void SliderCtrl::set_value(const boost::any& value, bool change_event)
+{
+	m_disable_change_event = !change_event;
+
+	m_slider->SetValue(boost::any_cast<int>(value)*m_scale);
+	int val = boost::any_cast<int>(get_value());
+	m_textctrl->SetLabel(wxString::Format("%d", val));
+
+	m_disable_change_event = false;
+}
+
+boost::any& SliderCtrl::get_value()
+{
+// 	int ret_val;
+// 	x_textctrl->GetValue().ToDouble(&val);
+	return m_value = int(m_slider->GetValue()/m_scale);
+}
+
+
+} // GUI
+} // Slic3r
+
+

src/slic3r/GUI/Field.hpp

@@ -0,0 +1,466 @@
+#ifndef SLIC3R_GUI_FIELD_HPP
+#define SLIC3R_GUI_FIELD_HPP
+
+#include <wx/wxprec.h>
+#ifndef WX_PRECOMP
+    #include <wx/wx.h>
+#endif
+
+#include <memory>
+#include <functional>
+#include <boost/any.hpp>
+
+#include <wx/spinctrl.h>
+#include <wx/clrpicker.h>
+
+#include "../../libslic3r/libslic3r.h"
+#include "../../libslic3r/Config.hpp"
+
+//#include "slic3r_gui.hpp"
+#include "GUI.hpp"
+#include "Utils.hpp"
+
+#ifdef __WXMSW__
+#define wxMSW true
+#else
+#define wxMSW false
+#endif
+
+namespace Slic3r { namespace GUI {
+
+class Field;
+using t_field = std::unique_ptr<Field>;
+using t_kill_focus = std::function<void()>;
+using t_change = std::function<void(t_config_option_key, const boost::any&)>;
+using t_back_to_init = std::function<void(const std::string&)>;
+
+wxString double_to_string(double const value);
+
+class MyButton : public wxButton
+{
+    bool hidden = false; // never show button if it's hidden ones
+public:
+	MyButton() {}
+	MyButton(wxWindow* parent, wxWindowID id, const wxString& label = wxEmptyString,
+		const wxPoint& pos = wxDefaultPosition,
+		const wxSize& size = wxDefaultSize, long style = 0,
+		const wxValidator& validator = wxDefaultValidator,
+		const wxString& name = wxTextCtrlNameStr)
+	{
+		this->Create(parent, id, label, pos, size, style, validator, name);
+	}
+
+	// overridden from wxWindow base class
+	virtual bool
+		AcceptsFocusFromKeyboard() const { return false; }
+
+    virtual bool Show(bool show = true) override {
+        if (!show)
+            hidden = true;
+        return wxButton::Show(!hidden);
+	}
+};
+
+class Field {
+protected:
+    // factory function to defer and enforce creation of derived type. 
+	virtual void	PostInitialize();
+    
+    /// Finish constructing the Field's wxWidget-related properties, including setting its own sizer, etc.
+    virtual void	BUILD() = 0;
+
+    /// Call the attached on_kill_focus method. 
+	//! It's important to use wxEvent instead of wxFocusEvent,
+	//! in another case we can't unfocused control at all
+	void			on_kill_focus(wxEvent& event);
+    /// Call the attached on_change method. 
+    void			on_change_field();
+    /// Call the attached m_back_to_initial_value method. 
+	void			on_back_to_initial_value();
+    /// Call the attached m_back_to_sys_value method. 
+	void			on_back_to_sys_value();
+
+public:
+    /// parent wx item, opportunity to refactor (probably not necessary - data duplication)
+    wxWindow*		m_parent {nullptr};
+
+    /// Function object to store callback passed in from owning object.
+	t_kill_focus	m_on_kill_focus {nullptr};
+
+    /// Function object to store callback passed in from owning object.
+	t_change		m_on_change {nullptr};
+
+	/// Function object to store callback passed in from owning object.
+	t_back_to_init	m_back_to_initial_value{ nullptr };
+	t_back_to_init	m_back_to_sys_value{ nullptr };
+
+	// This is used to avoid recursive invocation of the field change/update by wxWidgets.
+    bool			m_disable_change_event {false};
+    bool			m_is_modified_value {false};
+	bool			m_is_nonsys_value {true};
+
+    /// Copy of ConfigOption for deduction purposes
+    const ConfigOptionDef			m_opt {ConfigOptionDef()};
+	const t_config_option_key		m_opt_id;//! {""};
+	int								m_opt_idx = 0;
+
+    /// Sets a value for this control.
+    /// subclasses should overload with a specific version
+    /// Postcondition: Method does not fire the on_change event.
+    virtual void		set_value(const boost::any& value, bool change_event) = 0;
+    
+    /// Gets a boost::any representing this control.
+    /// subclasses should overload with a specific version
+    virtual boost::any&	get_value() = 0;
+
+    virtual void		enable() = 0;
+    virtual void		disable() = 0;
+
+	/// Fires the enable or disable function, based on the input.
+    inline void			toggle(bool en) { en ? enable() : disable(); }
+
+	virtual wxString	get_tooltip_text(const wxString& default_string);
+
+    // set icon to "UndoToSystemValue" button according to an inheritance of preset
+//	void				set_nonsys_btn_icon(const wxBitmap& icon);
+
+    Field(const ConfigOptionDef& opt, const t_config_option_key& id) : m_opt(opt), m_opt_id(id) {};
+    Field(wxWindow* parent, const ConfigOptionDef& opt, const t_config_option_key& id) : m_parent(parent), m_opt(opt), m_opt_id(id) {};
+
+    /// If you don't know what you are getting back, check both methods for nullptr. 
+    virtual wxSizer*	getSizer()  { return nullptr; }
+    virtual wxWindow*	getWindow() { return nullptr; }
+
+	bool				is_matched(const std::string& string, const std::string& pattern);
+	void				get_value_by_opt_type(wxString& str);
+
+    /// Factory method for generating new derived classes.
+    template<class T>
+    static t_field Create(wxWindow* parent, const ConfigOptionDef& opt, const t_config_option_key& id)  // interface for creating shared objects
+    {
+        auto p = Slic3r::make_unique<T>(parent, opt, id);
+        p->PostInitialize();
+		return std::move(p); //!p;
+    }
+
+    bool 	set_undo_bitmap(const wxBitmap *bmp) {
+    	if (m_undo_bitmap != bmp) {
+    		m_undo_bitmap = bmp;
+    		m_Undo_btn->SetBitmap(*bmp);
+    		return true;
+    	}
+    	return false;
+    }
+
+    bool 	set_undo_to_sys_bitmap(const wxBitmap *bmp) {
+    	if (m_undo_to_sys_bitmap != bmp) {
+    		m_undo_to_sys_bitmap = bmp;
+    		m_Undo_to_sys_btn->SetBitmap(*bmp);
+    		return true;
+    	}
+    	return false;
+    }
+
+	bool	set_label_colour(const wxColour *clr) {
+		if (m_Label == nullptr) return false;
+		if (m_label_color != clr) {
+			m_label_color = clr;
+			m_Label->SetForegroundColour(*clr);
+			m_Label->Refresh(true);
+		}
+		return false;
+	}
+
+	bool	set_label_colour_force(const wxColour *clr) {
+		if (m_Label == nullptr) return false;
+		m_Label->SetForegroundColour(*clr);
+		m_Label->Refresh(true);
+		return false;
+	}
+
+	bool 	set_undo_tooltip(const wxString *tip) {
+		if (m_undo_tooltip != tip) {
+			m_undo_tooltip = tip;
+			m_Undo_btn->SetToolTip(*tip);
+			return true;
+		}
+		return false;
+	}
+
+	bool 	set_undo_to_sys_tooltip(const wxString *tip) {
+		if (m_undo_to_sys_tooltip != tip) {
+			m_undo_to_sys_tooltip = tip;
+			m_Undo_to_sys_btn->SetToolTip(*tip);
+			return true;
+		}
+		return false;
+	}
+
+	void	set_side_text_ptr(wxStaticText* side_text) {
+		m_side_text = side_text;
+    }
+
+protected:
+	MyButton*			m_Undo_btn = nullptr;
+	// Bitmap and Tooltip text for m_Undo_btn. The wxButton will be updated only if the new wxBitmap pointer differs from the currently rendered one.
+	const wxBitmap*		m_undo_bitmap = nullptr;
+	const wxString*		m_undo_tooltip = nullptr;
+	MyButton*			m_Undo_to_sys_btn = nullptr;
+	// Bitmap and Tooltip text for m_Undo_to_sys_btn. The wxButton will be updated only if the new wxBitmap pointer differs from the currently rendered one.
+	const wxBitmap*		m_undo_to_sys_bitmap = nullptr;
+	const wxString*		m_undo_to_sys_tooltip = nullptr;
+
+	wxStaticText*		m_Label = nullptr;
+	// Color for Label. The wxColour will be updated only if the new wxColour pointer differs from the currently rendered one.
+	const wxColour*		m_label_color = nullptr;
+
+	wxStaticText*		m_side_text = nullptr;
+
+	// current value
+	boost::any			m_value;
+
+	friend class OptionsGroup;
+};
+
+/// Convenience function, accepts a const reference to t_field and checks to see whether 
+/// or not both wx pointers are null.
+inline bool is_bad_field(const t_field& obj) { return obj->getSizer() == nullptr && obj->getWindow() == nullptr; }
+
+/// Covenience function to determine whether this field is a valid window field.
+inline bool is_window_field(const t_field& obj) { return !is_bad_field(obj) && obj->getWindow() != nullptr && obj->getSizer() == nullptr; }
+
+/// Covenience function to determine whether this field is a valid sizer field.
+inline bool is_sizer_field(const t_field& obj) { return !is_bad_field(obj) && obj->getSizer() != nullptr; }
+
+class TextCtrl : public Field {
+    using Field::Field;
+#ifdef __WXGTK__
+	bool	bChangedValueEvent = true;
+    void    change_field_value(wxEvent& event);
+#endif //__WXGTK__
+public:
+	TextCtrl(const ConfigOptionDef& opt, const t_config_option_key& id) : Field(opt,  id) {}
+	TextCtrl(wxWindow* parent, const ConfigOptionDef& opt, const t_config_option_key& id) : Field(parent, opt, id) {}
+	~TextCtrl() {}
+
+    void BUILD();
+    wxWindow* window {nullptr};
+
+    virtual void	set_value(const std::string& value, bool change_event = false) {
+		m_disable_change_event = !change_event;
+        dynamic_cast<wxTextCtrl*>(window)->SetValue(wxString(value));
+		m_disable_change_event = false;
+    }
+	virtual void	set_value(const boost::any& value, bool change_event = false) {
+		m_disable_change_event = !change_event;
+		dynamic_cast<wxTextCtrl*>(window)->SetValue(boost::any_cast<wxString>(value));
+		m_disable_change_event = false;
+    }
+
+	boost::any&		get_value() override;
+
+    virtual void	enable();
+    virtual void	disable();
+    virtual wxWindow* getWindow() { return window; }
+};
+
+class CheckBox : public Field {
+	using Field::Field;
+public:
+	CheckBox(const ConfigOptionDef& opt, const t_config_option_key& id) : Field(opt, id) {}
+	CheckBox(wxWindow* parent, const ConfigOptionDef& opt, const t_config_option_key& id) : Field(parent, opt, id) {}
+	~CheckBox() {}
+
+	wxWindow*		window{ nullptr };
+	void			BUILD() override;
+
+	void			set_value(const bool value, bool change_event = false) {
+		m_disable_change_event = !change_event;
+		dynamic_cast<wxCheckBox*>(window)->SetValue(value);
+		m_disable_change_event = false;
+	}
+	void			set_value(const boost::any& value, bool change_event = false) {
+		m_disable_change_event = !change_event;
+		dynamic_cast<wxCheckBox*>(window)->SetValue(boost::any_cast<bool>(value));
+		m_disable_change_event = false;
+	}
+	boost::any&		get_value() override;
+
+	void			enable() override { dynamic_cast<wxCheckBox*>(window)->Enable(); }
+	void			disable() override { dynamic_cast<wxCheckBox*>(window)->Disable(); }
+	wxWindow*		getWindow() override { return window; }
+};
+
+class SpinCtrl : public Field {
+	using Field::Field;
+public:
+	SpinCtrl(const ConfigOptionDef& opt, const t_config_option_key& id) : Field(opt, id), tmp_value(-9999) {}
+	SpinCtrl(wxWindow* parent, const ConfigOptionDef& opt, const t_config_option_key& id) : Field(parent, opt, id), tmp_value(-9999) {}
+	~SpinCtrl() {}
+
+	int				tmp_value;
+
+	wxWindow*		window{ nullptr };
+	void			BUILD() override;
+
+	void			set_value(const std::string& value, bool change_event = false) {
+		m_disable_change_event = !change_event;
+		dynamic_cast<wxSpinCtrl*>(window)->SetValue(value);
+		m_disable_change_event = false;
+	}
+	void			set_value(const boost::any& value, bool change_event = false) {
+		m_disable_change_event = !change_event;
+		tmp_value = boost::any_cast<int>(value);
+		dynamic_cast<wxSpinCtrl*>(window)->SetValue(tmp_value);
+		m_disable_change_event = false;
+	}
+	boost::any&		get_value() override {
+// 		return boost::any(tmp_value);
+		return m_value = tmp_value;
+	}
+
+	void			enable() override { dynamic_cast<wxSpinCtrl*>(window)->Enable(); }
+	void			disable() override { dynamic_cast<wxSpinCtrl*>(window)->Disable(); }
+	wxWindow*		getWindow() override { return window; }
+};
+
+class Choice : public Field {
+	using Field::Field;
+public:
+	Choice(const ConfigOptionDef& opt, const t_config_option_key& id) : Field(opt, id) {}
+	Choice(wxWindow* parent, const ConfigOptionDef& opt, const t_config_option_key& id) : Field(parent, opt, id) {}
+	~Choice() {}
+
+	wxWindow*		window{ nullptr };
+	void			BUILD() override;
+
+	void			set_selection();
+	void			set_value(const std::string& value, bool change_event = false);
+	void			set_value(const boost::any& value, bool change_event = false);
+	void			set_values(const std::vector<std::string> &values);
+	boost::any&		get_value() override;
+
+	void			enable() override { dynamic_cast<wxComboBox*>(window)->Enable(); };
+	void			disable() override{ dynamic_cast<wxComboBox*>(window)->Disable(); };
+	wxWindow*		getWindow() override { return window; }
+};
+
+class ColourPicker : public Field {
+	using Field::Field;
+public:
+	ColourPicker(const ConfigOptionDef& opt, const t_config_option_key& id) : Field(opt, id) {}
+	ColourPicker(wxWindow* parent, const ConfigOptionDef& opt, const t_config_option_key& id) : Field(parent, opt, id) {}
+	~ColourPicker() {}
+
+	wxWindow*		window{ nullptr };
+	void			BUILD()  override;
+
+	void			set_value(const std::string& value, bool change_event = false) {
+		m_disable_change_event = !change_event;
+		dynamic_cast<wxColourPickerCtrl*>(window)->SetColour(value);
+		m_disable_change_event = false;
+	 	}
+	void			set_value(const boost::any& value, bool change_event = false) {
+		m_disable_change_event = !change_event;
+		dynamic_cast<wxColourPickerCtrl*>(window)->SetColour(boost::any_cast<wxString>(value));
+		m_disable_change_event = false;
+	}
+
+	boost::any&		get_value() override;
+
+	void			enable() override { dynamic_cast<wxColourPickerCtrl*>(window)->Enable(); };
+	void			disable() override{ dynamic_cast<wxColourPickerCtrl*>(window)->Disable(); };
+	wxWindow*		getWindow() override { return window; }
+};
+
+class PointCtrl : public Field {
+	using Field::Field;
+public:
+	PointCtrl(const ConfigOptionDef& opt, const t_config_option_key& id) : Field(opt, id) {}
+	PointCtrl(wxWindow* parent, const ConfigOptionDef& opt, const t_config_option_key& id) : Field(parent, opt, id) {}
+	~PointCtrl() {}
+
+	wxSizer*		sizer{ nullptr };
+	wxTextCtrl*		x_textctrl{ nullptr };
+	wxTextCtrl*		y_textctrl{ nullptr };
+
+	void			BUILD()  override;
+
+	void			set_value(const Vec2d& value, bool change_event = false);
+	void			set_value(const boost::any& value, bool change_event = false);
+	boost::any&		get_value() override;
+
+	void			enable() override {
+		x_textctrl->Enable();
+		y_textctrl->Enable(); }
+	void			disable() override{
+		x_textctrl->Disable();
+		y_textctrl->Disable(); }
+	wxSizer*		getSizer() override { return sizer; }
+};
+
+class StaticText : public Field {
+	using Field::Field;
+public:
+	StaticText(const ConfigOptionDef& opt, const t_config_option_key& id) : Field(opt, id) {}
+	StaticText(wxWindow* parent, const ConfigOptionDef& opt, const t_config_option_key& id) : Field(parent, opt, id) {}
+	~StaticText() {}
+
+	wxWindow*		window{ nullptr };
+	void			BUILD()  override;
+
+	void			set_value(const std::string& value, bool change_event = false) {
+		m_disable_change_event = !change_event;
+		dynamic_cast<wxStaticText*>(window)->SetLabel(value);
+		m_disable_change_event = false;
+	}
+	void			set_value(const boost::any& value, bool change_event = false) {
+		m_disable_change_event = !change_event;
+		dynamic_cast<wxStaticText*>(window)->SetLabel(boost::any_cast<wxString>(value));
+		m_disable_change_event = false;
+	}
+
+	boost::any&		get_value()override { return m_value; }
+
+	void			enable() override { dynamic_cast<wxStaticText*>(window)->Enable(); };
+	void			disable() override{ dynamic_cast<wxStaticText*>(window)->Disable(); };
+	wxWindow*		getWindow() override { return window; }
+};
+
+class SliderCtrl : public Field {
+	using Field::Field;
+public:
+	SliderCtrl(const ConfigOptionDef& opt, const t_config_option_key& id) : Field(opt, id) {}
+	SliderCtrl(wxWindow* parent, const ConfigOptionDef& opt, const t_config_option_key& id) : Field(parent, opt, id) {}
+	~SliderCtrl() {}
+
+	wxSizer*		m_sizer{ nullptr };
+	wxTextCtrl*		m_textctrl{ nullptr };
+	wxSlider*		m_slider{ nullptr };
+
+	int				m_scale = 10;
+
+	void			BUILD()  override;
+
+	void			set_value(const int value, bool change_event = false);
+	void			set_value(const boost::any& value, bool change_event = false);
+	boost::any&		get_value() override;
+
+	void			enable() override {
+		m_slider->Enable();
+		m_textctrl->Enable();
+		m_textctrl->SetEditable(true);
+	}
+	void			disable() override{
+		m_slider->Disable();
+		m_textctrl->Disable();
+		m_textctrl->SetEditable(false);
+	}
+	wxSizer*		getSizer() override { return m_sizer; }
+	wxWindow*		getWindow() override { return dynamic_cast<wxWindow*>(m_slider); }
+};
+
+} // GUI
+} // Slic3r
+
+#endif /* SLIC3R_GUI_FIELD_HPP */

src/slic3r/GUI/FirmwareDialog.cpp

@@ -0,0 +1,846 @@
+#include <numeric>
+#include <algorithm>
+#include <thread>
+#include <condition_variable>
+#include <stdexcept>
+#include <boost/format.hpp>
+#include <boost/asio.hpp>
+#include <boost/filesystem/path.hpp>
+#include <boost/filesystem/fstream.hpp>
+#include <boost/log/trivial.hpp>
+#include <boost/optional.hpp>
+
+#include "libslic3r/Utils.hpp"
+#include "avrdude/avrdude-slic3r.hpp"
+#include "GUI.hpp"
+#include "MsgDialog.hpp"
+#include "../Utils/HexFile.hpp"
+#include "../Utils/Serial.hpp"
+
+// wx includes need to come after asio because of the WinSock.h problem
+#include "FirmwareDialog.hpp"
+
+#include <wx/app.h>
+#include <wx/event.h>
+#include <wx/sizer.h>
+#include <wx/settings.h>
+#include <wx/timer.h>
+#include <wx/panel.h>
+#include <wx/button.h>
+#include <wx/filepicker.h>
+#include <wx/textctrl.h>
+#include <wx/stattext.h>
+#include <wx/combobox.h>
+#include <wx/gauge.h>
+#include <wx/collpane.h>
+#include <wx/msgdlg.h>
+#include <wx/filefn.h>
+
+
+namespace fs = boost::filesystem;
+namespace asio = boost::asio;
+using boost::system::error_code;
+using boost::optional;
+
+
+namespace Slic3r {
+
+using Utils::HexFile;
+using Utils::SerialPortInfo;
+using Utils::Serial;
+
+
+// USB IDs used to perform device lookup
+enum {
+	USB_VID_PRUSA    = 0x2c99,
+	USB_PID_MK2      = 1,
+	USB_PID_MK3      = 2,
+	USB_PID_MMU_BOOT = 3,
+	USB_PID_MMU_APP  = 4,
+};
+
+// This enum discriminates the kind of information in EVT_AVRDUDE,
+// it's stored in the ExtraLong field of wxCommandEvent.
+enum AvrdudeEvent
+{
+	AE_MESSAGE,
+	AE_PROGRESS,
+	AE_STATUS,
+	AE_EXIT,
+};
+
+wxDECLARE_EVENT(EVT_AVRDUDE, wxCommandEvent);
+wxDEFINE_EVENT(EVT_AVRDUDE, wxCommandEvent);
+
+wxDECLARE_EVENT(EVT_ASYNC_DIALOG, wxCommandEvent);
+wxDEFINE_EVENT(EVT_ASYNC_DIALOG, wxCommandEvent);
+
+
+// Private
+
+struct FirmwareDialog::priv
+{
+	enum AvrDudeComplete
+	{
+		AC_NONE,
+		AC_SUCCESS,
+		AC_FAILURE,
+		AC_USER_CANCELLED,
+	};
+
+	FirmwareDialog *q;      // PIMPL back pointer ("Q-Pointer")
+
+	// GUI elements
+	wxComboBox *port_picker;
+	wxStaticText *port_autodetect;
+	wxFilePickerCtrl *hex_picker;
+	wxStaticText *txt_status;
+	wxGauge *progressbar;
+	wxCollapsiblePane *spoiler;
+	wxTextCtrl *txt_stdout;
+	wxButton *btn_rescan;
+	wxButton *btn_close;
+	wxButton *btn_flash;
+	wxString btn_flash_label_ready;
+	wxString btn_flash_label_flashing;
+	wxString label_status_flashing;
+
+	wxTimer timer_pulse;
+
+	// Async modal dialog during flashing
+	std::mutex mutex;
+	int modal_response;
+	std::condition_variable response_cv;
+
+	// Data
+	std::vector<SerialPortInfo> ports;
+	optional<SerialPortInfo> port;
+	HexFile hex_file;
+
+	// This is a shared pointer holding the background AvrDude task
+	// also serves as a status indication (it is set _iff_ the background task is running, otherwise it is reset).
+	AvrDude::Ptr avrdude;
+	std::string avrdude_config;
+	unsigned progress_tasks_done;
+	unsigned progress_tasks_bar;
+	bool user_cancelled;
+	const bool extra_verbose;   // For debugging
+
+	priv(FirmwareDialog *q) :
+		q(q),
+		btn_flash_label_ready(_(L("Flash!"))),
+		btn_flash_label_flashing(_(L("Cancel"))),
+		label_status_flashing(_(L("Flashing in progress. Please do not disconnect the printer!"))),
+		timer_pulse(q),
+		avrdude_config((fs::path(::Slic3r::resources_dir()) / "avrdude" / "avrdude.conf").string()),
+		progress_tasks_done(0),
+		progress_tasks_bar(0),
+		user_cancelled(false),
+		extra_verbose(false)
+	{}
+
+	void find_serial_ports();
+	void fit_no_shrink();
+	void set_txt_status(const wxString &label);
+	void flashing_start(unsigned tasks);
+	void flashing_done(AvrDudeComplete complete);
+	void enable_port_picker(bool enable);
+	void load_hex_file(const wxString &path);
+	void queue_status(wxString message);
+	void queue_error(const wxString &message);
+
+	bool ask_model_id_mismatch(const std::string &printer_model);
+	bool check_model_id();
+	void wait_for_mmu_bootloader(unsigned retries);
+	void mmu_reboot(const SerialPortInfo &port);
+	void lookup_port_mmu();
+	void prepare_common();
+	void prepare_mk2();
+	void prepare_mk3();
+	void prepare_mm_control();
+	void perform_upload();
+
+	void user_cancel();
+	void on_avrdude(const wxCommandEvent &evt);
+	void on_async_dialog(const wxCommandEvent &evt);
+	void ensure_joined();
+};
+
+void FirmwareDialog::priv::find_serial_ports()
+{
+	auto new_ports = Utils::scan_serial_ports_extended();
+	if (new_ports != this->ports) {
+		this->ports = new_ports;
+		port_picker->Clear();
+		for (const auto &port : this->ports)
+			port_picker->Append(wxString::FromUTF8(port.friendly_name.data()));
+		if (ports.size() > 0) {
+			int idx = port_picker->GetValue().IsEmpty() ? 0 : -1;
+			for (int i = 0; i < (int)this->ports.size(); ++ i)
+				if (this->ports[i].is_printer) {
+					idx = i;
+					break;
+				}
+			if (idx != -1)
+				port_picker->SetSelection(idx);
+		}
+	}
+}
+
+void FirmwareDialog::priv::fit_no_shrink()
+{
+	// Ensure content fits into window and window is not shrinked
+	const auto old_size = q->GetSize();
+	q->Layout();
+	q->Fit();
+	const auto new_size = q->GetSize();
+	const auto new_width = std::max(old_size.GetWidth(), new_size.GetWidth());
+	const auto new_height = std::max(old_size.GetHeight(), new_size.GetHeight());
+	q->SetSize(new_width, new_height);
+}
+
+void FirmwareDialog::priv::set_txt_status(const wxString &label)
+{
+	const auto width = txt_status->GetSize().GetWidth();
+	txt_status->SetLabel(label);
+	txt_status->Wrap(width);
+
+	fit_no_shrink();
+}
+
+void FirmwareDialog::priv::flashing_start(unsigned tasks)
+{
+	modal_response = wxID_NONE;
+	txt_stdout->Clear();
+	set_txt_status(label_status_flashing);
+	txt_status->SetForegroundColour(GUI::get_label_clr_modified());
+	port_picker->Disable();
+	btn_rescan->Disable();
+	hex_picker->Disable();
+	btn_close->Disable();
+	btn_flash->SetLabel(btn_flash_label_flashing);
+	progressbar->SetRange(200 * tasks);   // See progress callback below
+	progressbar->SetValue(0);
+	progress_tasks_done = 0;
+	progress_tasks_bar = 0;
+	user_cancelled = false;
+	timer_pulse.Start(50);
+}
+
+void FirmwareDialog::priv::flashing_done(AvrDudeComplete complete)
+{
+	auto text_color = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
+	port_picker->Enable();
+	btn_rescan->Enable();
+	hex_picker->Enable();
+	btn_close->Enable();
+	btn_flash->SetLabel(btn_flash_label_ready);
+	txt_status->SetForegroundColour(text_color);
+	timer_pulse.Stop();
+	progressbar->SetValue(progressbar->GetRange());
+
+	switch (complete) {
+	case AC_SUCCESS: set_txt_status(_(L("Flashing succeeded!"))); break;
+	case AC_FAILURE: set_txt_status(_(L("Flashing failed. Please see the avrdude log below."))); break;
+	case AC_USER_CANCELLED: set_txt_status(_(L("Flashing cancelled."))); break;
+	default: break;
+	}
+}
+
+void FirmwareDialog::priv::enable_port_picker(bool enable)
+{
+	port_picker->Show(enable);
+	btn_rescan->Show(enable);
+	port_autodetect->Show(! enable);
+	q->Layout();
+	fit_no_shrink();
+}
+
+void FirmwareDialog::priv::load_hex_file(const wxString &path)
+{
+	hex_file = HexFile(path.wx_str());
+	enable_port_picker(hex_file.device != HexFile::DEV_MM_CONTROL);
+}
+
+void FirmwareDialog::priv::queue_status(wxString message)
+{
+	auto evt = new wxCommandEvent(EVT_AVRDUDE, this->q->GetId());
+	evt->SetExtraLong(AE_STATUS);
+	evt->SetString(std::move(message));
+	wxQueueEvent(this->q, evt);
+}
+
+void FirmwareDialog::priv::queue_error(const wxString &message)
+{
+	auto evt = new wxCommandEvent(EVT_AVRDUDE, this->q->GetId());
+	evt->SetExtraLong(AE_STATUS);
+	evt->SetString(wxString::Format(_(L("Flashing failed: %s")), message));
+
+	wxQueueEvent(this->q, evt);	avrdude->cancel();
+}
+
+bool FirmwareDialog::priv::ask_model_id_mismatch(const std::string &printer_model)
+{
+	// model_id in the hex file doesn't match what the printer repoted.
+	// Ask the user if it should be flashed anyway.
+
+	std::unique_lock<std::mutex> lock(mutex);
+
+	auto evt = new wxCommandEvent(EVT_ASYNC_DIALOG, this->q->GetId());
+	evt->SetString(wxString::Format(_(L(
+		"This firmware hex file does not match the printer model.\n"
+		"The hex file is intended for: %s\n"
+		"Printer reported: %s\n\n"
+		"Do you want to continue and flash this hex file anyway?\n"
+		"Please only continue if you are sure this is the right thing to do.")),
+		hex_file.model_id, printer_model
+	));
+	wxQueueEvent(this->q, evt);
+
+	response_cv.wait(lock, [this]() { return this->modal_response != wxID_NONE; });
+
+	if (modal_response == wxID_YES) { 
+		return true;
+	} else {
+		user_cancel();
+		return false;
+	}
+}
+
+bool FirmwareDialog::priv::check_model_id()
+{
+	// XXX: The implementation in Serial doesn't currently work reliably enough to be used.
+	// Therefore, regretably, so far the check cannot be used and we just return true here.
+	// TODO: Rewrite Serial using more platform-native code.
+	return true;
+	
+	// if (hex_file.model_id.empty()) {
+	// 	// No data to check against, assume it's ok
+	// 	return true;
+	// }
+
+	// asio::io_service io;
+	// Serial serial(io, port->port, 115200);
+	// serial.printer_setup();
+
+	// enum {
+	// 	TIMEOUT = 2000,
+	// 	RETREIES = 5,
+	// };
+
+	// if (! serial.printer_ready_wait(RETREIES, TIMEOUT)) {
+	// 	queue_error(wxString::Format(_(L("Could not connect to the printer at %s")), port->port));
+	// 	return false;
+	// }
+
+	// std::string line;
+	// error_code ec;
+	// serial.printer_write_line("PRUSA Rev");
+	// while (serial.read_line(TIMEOUT, line, ec)) {
+	// 	if (ec) {
+	// 		queue_error(wxString::Format(_(L("Could not connect to the printer at %s")), port->port));
+	// 		return false;
+	// 	}
+
+	// 	if (line == "ok") { continue; }
+
+	// 	if (line == hex_file.model_id) {
+	// 		return true;
+	// 	} else {
+	// 		return ask_model_id_mismatch(line);
+	// 	}
+
+	// 	line.clear();
+	// }
+
+	// return false;
+}
+
+void FirmwareDialog::priv::wait_for_mmu_bootloader(unsigned retries)
+{
+	enum {
+		SLEEP_MS = 500,
+	};
+
+	for (unsigned i = 0; i < retries && !user_cancelled; i++) {
+		std::this_thread::sleep_for(std::chrono::milliseconds(SLEEP_MS));
+
+		auto ports = Utils::scan_serial_ports_extended();
+		ports.erase(std::remove_if(ports.begin(), ports.end(), [=](const SerialPortInfo &port ) {
+			return port.id_vendor != USB_VID_PRUSA || port.id_product != USB_PID_MMU_BOOT;
+		}), ports.end());
+
+		if (ports.size() == 1) {
+			port = ports[0];
+			return;
+		} else if (ports.size() > 1) {
+			BOOST_LOG_TRIVIAL(error) << "Several VID/PID 0x2c99/3 devices found";
+			queue_error(_(L("Multiple Original Prusa i3 MMU 2.0 devices found. Please only connect one at a time for flashing.")));
+			return;
+		}
+	}
+}
+
+void FirmwareDialog::priv::mmu_reboot(const SerialPortInfo &port)
+{
+	asio::io_service io;
+	Serial serial(io, port.port, 1200);
+	std::this_thread::sleep_for(std::chrono::milliseconds(50));
+}
+
+void FirmwareDialog::priv::lookup_port_mmu()
+{
+	static const auto msg_not_found =
+		"The Multi Material Control device was not found.\n"
+		"If the device is connected, please press the Reset button next to the USB connector ...";
+
+	BOOST_LOG_TRIVIAL(info) << "Flashing MMU 2.0, looking for VID/PID 0x2c99/3 or 0x2c99/4 ...";
+
+	auto ports = Utils::scan_serial_ports_extended();
+	ports.erase(std::remove_if(ports.begin(), ports.end(), [=](const SerialPortInfo &port ) {
+		return port.id_vendor != USB_VID_PRUSA ||
+			port.id_product != USB_PID_MMU_BOOT &&
+			port.id_product != USB_PID_MMU_APP;
+	}), ports.end());
+
+	if (ports.size() == 0) {
+		BOOST_LOG_TRIVIAL(info) << "MMU 2.0 device not found, asking the user to press Reset and waiting for the device to show up ...";
+		queue_status(_(L(msg_not_found)));
+		wait_for_mmu_bootloader(30);
+	} else if (ports.size() > 1) {
+		BOOST_LOG_TRIVIAL(error) << "Several VID/PID 0x2c99/3 devices found";
+		queue_error(_(L("Multiple Original Prusa i3 MMU 2.0 devices found. Please only connect one at a time for flashing.")));
+	} else {
+		if (ports[0].id_product == USB_PID_MMU_APP) {
+			// The device needs to be rebooted into the bootloader mode
+			BOOST_LOG_TRIVIAL(info) << boost::format("Found VID/PID 0x2c99/4 at `%1%`, rebooting the device ...") % ports[0].port;
+			mmu_reboot(ports[0]);
+			wait_for_mmu_bootloader(10);
+
+			if (! port) {
+				// The device in bootloader mode was not found, inform the user and wait some more...
+				BOOST_LOG_TRIVIAL(info) << "MMU 2.0 bootloader device not found after reboot, asking the user to press Reset and waiting for the device to show up ...";
+				queue_status(_(L(msg_not_found)));
+				wait_for_mmu_bootloader(30);
+			}
+		} else {
+			port = ports[0];
+		}
+	}
+}
+
+void FirmwareDialog::priv::prepare_common()
+{
+	std::vector<std::string> args {{
+		extra_verbose ? "-vvvvv" : "-v",
+		"-p", "atmega2560",
+		// Using the "Wiring" mode to program Rambo or Einsy, using the STK500v2 protocol (not the STK500).
+		// The Prusa's avrdude is patched to never send semicolons inside the data packets, as the USB to serial chip
+		// is flashed with a buggy firmware.
+		"-c", "wiring",
+		"-P", port->port,
+		"-b", "115200",   // TODO: Allow other rates? Ditto elsewhere.
+		"-D",
+		"-U", (boost::format("flash:w:0:%1%:i") % hex_file.path.string()).str(),
+	}};
+
+	BOOST_LOG_TRIVIAL(info) << "Invoking avrdude, arguments: "
+		<< std::accumulate(std::next(args.begin()), args.end(), args[0], [](std::string a, const std::string &b) {
+			return a + ' ' + b;
+		});
+
+	avrdude->push_args(std::move(args));
+}
+
+void FirmwareDialog::priv::prepare_mk2()
+{
+	if (! port) { return; }
+
+	if (! check_model_id()) {
+		avrdude->cancel();
+		return;
+	}
+
+	prepare_common();
+}
+
+void FirmwareDialog::priv::prepare_mk3()
+{
+	if (! port) { return; }
+
+	if (! check_model_id()) {
+		avrdude->cancel();
+		return;
+	}
+
+	prepare_common();
+
+	// The hex file also contains another section with l10n data to be flashed into the external flash on MK3 (Einsy)
+	// This is done via another avrdude invocation, here we build arg list for that:
+	std::vector<std::string> args {{
+		extra_verbose ? "-vvvvv" : "-v",
+		"-p", "atmega2560",
+		// Using the "Arduino" mode to program Einsy's external flash with languages, using the STK500 protocol (not the STK500v2).
+		// The Prusa's avrdude is patched again to never send semicolons inside the data packets.
+		"-c", "arduino",
+		"-P", port->port,
+		"-b", "115200",
+		"-D",
+		"-u", // disable safe mode
+		"-U", (boost::format("flash:w:1:%1%:i") % hex_file.path.string()).str(),
+	}};
+
+	BOOST_LOG_TRIVIAL(info) << "Invoking avrdude for external flash flashing, arguments: "
+		<< std::accumulate(std::next(args.begin()), args.end(), args[0], [](std::string a, const std::string &b) {
+			return a + ' ' + b;
+		});
+
+	avrdude->push_args(std::move(args));
+}
+
+void FirmwareDialog::priv::prepare_mm_control()
+{
+	port = boost::none;
+	lookup_port_mmu();
+	if (! port) {
+		queue_error(_(L("The device could not have been found")));
+		return;
+	}
+
+	BOOST_LOG_TRIVIAL(info) << boost::format("Found VID/PID 0x2c99/3 at `%1%`, flashing ...") % port->port;
+	queue_status(label_status_flashing);
+
+	std::vector<std::string> args {{
+		extra_verbose ? "-vvvvv" : "-v",
+		"-p", "atmega32u4",
+		"-c", "avr109",
+		"-P", port->port,
+		"-b", "57600",
+		"-D",
+		"-U", (boost::format("flash:w:0:%1%:i") % hex_file.path.string()).str(),
+	}};
+
+	BOOST_LOG_TRIVIAL(info) << "Invoking avrdude, arguments: "
+		<< std::accumulate(std::next(args.begin()), args.end(), args[0], [](std::string a, const std::string &b) {
+			return a + ' ' + b;
+		});
+
+	avrdude->push_args(std::move(args));
+}
+
+
+void FirmwareDialog::priv::perform_upload()
+{
+	auto filename = hex_picker->GetPath();
+	if (filename.IsEmpty()) { return; }
+
+	load_hex_file(filename);  // Might already be loaded, but we want to make sure it's fresh
+
+	int selection = port_picker->GetSelection();
+	if (selection != wxNOT_FOUND) {
+		port = this->ports[selection];
+
+		// Verify whether the combo box list selection equals to the combo box edit value.
+		if (wxString::FromUTF8(port->friendly_name.data()) != port_picker->GetValue()) {
+			return;
+		}
+	}
+
+	const bool extra_verbose = false;   // For debugging
+
+	flashing_start(hex_file.device == HexFile::DEV_MK3 ? 2 : 1);
+
+	// Init the avrdude object
+	AvrDude avrdude(avrdude_config);
+
+	// It is ok here to use the q-pointer to the FirmwareDialog
+	// because the dialog ensures it doesn't exit before the background thread is done.
+	auto q = this->q;
+
+	avrdude
+		.on_run([this](AvrDude::Ptr avrdude) {
+			this->avrdude = std::move(avrdude);
+
+			try {
+				switch (this->hex_file.device) {
+				case HexFile::DEV_MK3:
+					this->prepare_mk3();
+					break;
+
+				case HexFile::DEV_MM_CONTROL:
+					this->prepare_mm_control();
+					break;
+
+				default:
+					this->prepare_mk2();
+					break;
+				}
+			} catch (const std::exception &ex) {
+				queue_error(wxString::Format(_(L("Error accessing port at %s: %s")), port->port, ex.what()));
+			}
+		})
+		.on_message(std::move([q, extra_verbose](const char *msg, unsigned /* size */) {
+			if (extra_verbose) {
+				BOOST_LOG_TRIVIAL(debug) << "avrdude: " << msg;
+			}
+
+			auto evt = new wxCommandEvent(EVT_AVRDUDE, q->GetId());
+			auto wxmsg = wxString::FromUTF8(msg);
+			evt->SetExtraLong(AE_MESSAGE);
+			evt->SetString(std::move(wxmsg));
+			wxQueueEvent(q, evt);
+		}))
+		.on_progress(std::move([q](const char * /* task */, unsigned progress) {
+			auto evt = new wxCommandEvent(EVT_AVRDUDE, q->GetId());
+			evt->SetExtraLong(AE_PROGRESS);
+			evt->SetInt(progress);
+			wxQueueEvent(q, evt);
+		}))
+		.on_complete(std::move([this]() {
+			auto evt = new wxCommandEvent(EVT_AVRDUDE, this->q->GetId());
+			evt->SetExtraLong(AE_EXIT);
+			evt->SetInt(this->avrdude->exit_code());
+			wxQueueEvent(this->q, evt);
+		}))
+		.run();
+}
+
+void FirmwareDialog::priv::user_cancel()
+{
+	if (avrdude) {
+		user_cancelled = true;
+		avrdude->cancel();
+	}
+}
+
+void FirmwareDialog::priv::on_avrdude(const wxCommandEvent &evt)
+{
+	AvrDudeComplete complete_kind;
+
+	switch (evt.GetExtraLong()) {
+	case AE_MESSAGE:
+		txt_stdout->AppendText(evt.GetString());
+		break;
+
+	case AE_PROGRESS:
+		// We try to track overall progress here.
+		// Avrdude performs 3 tasks per one memory operation ("-U" arg),
+		// first of which is reading of status data (very short).
+		// We use the timer_pulse during the very first task to indicate intialization
+		// and then display overall progress during the latter tasks.
+
+		if (progress_tasks_done > 0) {
+			progressbar->SetValue(progress_tasks_bar + evt.GetInt());
+		}
+
+		if (evt.GetInt() == 100) {
+			timer_pulse.Stop();
+			if (progress_tasks_done % 3 != 0) {
+				progress_tasks_bar += 100;
+			}
+			progress_tasks_done++;
+		}
+
+		break;
+
+	case AE_EXIT:
+		BOOST_LOG_TRIVIAL(info) << "avrdude exit code: " << evt.GetInt();
+
+		// Figure out the exit state
+		if (user_cancelled) { complete_kind = AC_USER_CANCELLED; }
+		else if (avrdude->cancelled()) { complete_kind = AC_NONE; } // Ie. cancelled programatically
+		else { complete_kind = evt.GetInt() == 0 ? AC_SUCCESS : AC_FAILURE; }
+
+		flashing_done(complete_kind);
+		ensure_joined();
+		break;
+
+	case AE_STATUS:
+		set_txt_status(evt.GetString());
+		break;
+
+	default:
+		break;
+	}
+}
+
+void FirmwareDialog::priv::on_async_dialog(const wxCommandEvent &evt)
+{
+	wxMessageDialog dlg(this->q, evt.GetString(), wxMessageBoxCaptionStr, wxYES_NO | wxNO_DEFAULT | wxICON_QUESTION);
+	{
+		std::lock_guard<std::mutex> lock(mutex);
+		modal_response = dlg.ShowModal();
+	}
+	response_cv.notify_all();
+}
+
+void FirmwareDialog::priv::ensure_joined()
+{
+	// Make sure the background thread is collected and the AvrDude object reset
+	if (avrdude) { avrdude->join(); }
+	avrdude.reset();
+}
+
+
+// Public
+
+FirmwareDialog::FirmwareDialog(wxWindow *parent) :
+	wxDialog(parent, wxID_ANY, _(L("Firmware flasher")), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER),
+	p(new priv(this))
+{
+	enum {
+		DIALOG_MARGIN = 15,
+		SPACING = 10,
+		MIN_WIDTH = 600,
+		MIN_HEIGHT = 200,
+		MIN_HEIGHT_EXPANDED = 500,
+	};
+
+	wxFont status_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+	status_font.MakeBold();
+	wxFont mono_font(wxFontInfo().Family(wxFONTFAMILY_TELETYPE));
+	mono_font.MakeSmaller();
+
+	// Create GUI components and layout
+
+	auto *panel = new wxPanel(this);
+	wxBoxSizer *vsizer = new wxBoxSizer(wxVERTICAL);
+	panel->SetSizer(vsizer);
+
+	auto *label_hex_picker = new wxStaticText(panel, wxID_ANY, _(L("Firmware image:")));
+	p->hex_picker = new wxFilePickerCtrl(panel, wxID_ANY, wxEmptyString, wxFileSelectorPromptStr, 
+		"Hex files (*.hex)|*.hex|All files|*.*");
+
+	auto *label_port_picker = new wxStaticText(panel, wxID_ANY, _(L("Serial port:")));
+	p->port_picker = new wxComboBox(panel, wxID_ANY);
+	p->port_autodetect = new wxStaticText(panel, wxID_ANY, _(L("Autodetected")));
+	p->btn_rescan = new wxButton(panel, wxID_ANY, _(L("Rescan")));
+	auto *port_sizer = new wxBoxSizer(wxHORIZONTAL);
+	port_sizer->Add(p->port_picker, 1, wxEXPAND | wxRIGHT, SPACING);
+	port_sizer->Add(p->btn_rescan, 0);
+	port_sizer->Add(p->port_autodetect, 1, wxEXPAND);
+	p->enable_port_picker(true);
+
+	auto *label_progress = new wxStaticText(panel, wxID_ANY, _(L("Progress:")));
+	p->progressbar = new wxGauge(panel, wxID_ANY, 1, wxDefaultPosition, wxDefaultSize, wxGA_HORIZONTAL | wxGA_SMOOTH);
+
+	auto *label_status = new wxStaticText(panel, wxID_ANY, _(L("Status:")));
+	p->txt_status = new wxStaticText(panel, wxID_ANY, _(L("Ready")));
+	p->txt_status->SetFont(status_font);
+
+	auto *grid = new wxFlexGridSizer(2, SPACING, SPACING);
+	grid->AddGrowableCol(1);
+
+	grid->Add(label_hex_picker, 0, wxALIGN_CENTER_VERTICAL);
+	grid->Add(p->hex_picker, 0, wxEXPAND);
+
+	grid->Add(label_port_picker, 0, wxALIGN_CENTER_VERTICAL);
+	grid->Add(port_sizer, 0, wxEXPAND);
+
+	grid->Add(label_progress, 0, wxALIGN_CENTER_VERTICAL);
+	grid->Add(p->progressbar, 1, wxEXPAND | wxALIGN_CENTER_VERTICAL);
+
+	grid->Add(label_status, 0, wxALIGN_CENTER_VERTICAL);
+	grid->Add(p->txt_status, 0, wxEXPAND);
+
+	vsizer->Add(grid, 0, wxEXPAND | wxTOP | wxBOTTOM, SPACING);
+
+	p->spoiler = new wxCollapsiblePane(panel, wxID_ANY, _(L("Advanced: avrdude output log")), wxDefaultPosition, wxDefaultSize, wxCP_DEFAULT_STYLE | wxCP_NO_TLW_RESIZE);
+	auto *spoiler_pane = p->spoiler->GetPane();
+	auto *spoiler_sizer = new wxBoxSizer(wxVERTICAL);
+	p->txt_stdout = new wxTextCtrl(spoiler_pane, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxTE_MULTILINE | wxTE_READONLY);
+	p->txt_stdout->SetFont(mono_font);
+	spoiler_sizer->Add(p->txt_stdout, 1, wxEXPAND);
+	spoiler_pane->SetSizer(spoiler_sizer);
+	// The doc says proportion need to be 0 for wxCollapsiblePane.
+	// Experience says it needs to be 1, otherwise things won't get sized properly.
+	vsizer->Add(p->spoiler, 1, wxEXPAND | wxBOTTOM, SPACING);
+
+	p->btn_close = new wxButton(panel, wxID_CLOSE);
+	p->btn_flash = new wxButton(panel, wxID_ANY, p->btn_flash_label_ready);
+	p->btn_flash->Disable();
+	auto *bsizer = new wxBoxSizer(wxHORIZONTAL);
+	bsizer->Add(p->btn_close);
+	bsizer->AddStretchSpacer();
+	bsizer->Add(p->btn_flash);
+	vsizer->Add(bsizer, 0, wxEXPAND);
+
+	auto *topsizer = new wxBoxSizer(wxVERTICAL);
+	topsizer->Add(panel, 1, wxEXPAND | wxALL, DIALOG_MARGIN);
+	SetMinSize(wxSize(MIN_WIDTH, MIN_HEIGHT));
+	SetSizerAndFit(topsizer);
+	const auto size = GetSize();
+	SetSize(std::max(size.GetWidth(), static_cast<int>(MIN_WIDTH)), std::max(size.GetHeight(), static_cast<int>(MIN_HEIGHT)));
+	Layout();
+
+	// Bind events
+
+	p->hex_picker->Bind(wxEVT_FILEPICKER_CHANGED, [this](wxFileDirPickerEvent& evt) {
+		if (wxFileExists(evt.GetPath())) {
+			this->p->load_hex_file(evt.GetPath());
+			this->p->btn_flash->Enable();
+		}
+	});
+
+	p->spoiler->Bind(wxEVT_COLLAPSIBLEPANE_CHANGED, [this](wxCollapsiblePaneEvent &evt) {
+		if (evt.GetCollapsed()) {
+			this->SetMinSize(wxSize(MIN_WIDTH, MIN_HEIGHT));
+			const auto new_height = this->GetSize().GetHeight() - this->p->txt_stdout->GetSize().GetHeight();
+			this->SetSize(this->GetSize().GetWidth(), new_height);
+		} else {
+			this->SetMinSize(wxSize(MIN_WIDTH, MIN_HEIGHT_EXPANDED));
+		}
+
+		this->Layout();
+		this->p->fit_no_shrink();
+	});
+
+	p->btn_close->Bind(wxEVT_BUTTON, [this](wxCommandEvent &) { this->Close(); });
+	p->btn_rescan->Bind(wxEVT_BUTTON, [this](wxCommandEvent &) { this->p->find_serial_ports(); });
+
+	p->btn_flash->Bind(wxEVT_BUTTON, [this](wxCommandEvent &) {
+		if (this->p->avrdude) {
+			// Flashing is in progress, ask the user if they're really sure about canceling it
+			wxMessageDialog dlg(this,
+				_(L("Are you sure you want to cancel firmware flashing?\nThis could leave your printer in an unusable state!")),
+				_(L("Confirmation")),
+				wxYES_NO | wxNO_DEFAULT | wxICON_QUESTION);
+			if (dlg.ShowModal() == wxID_YES) {
+				this->p->set_txt_status(_(L("Cancelling...")));
+				this->p->user_cancel();
+			}
+		} else {
+			// Start a flashing task
+			this->p->perform_upload();
+		}
+	});
+
+	Bind(wxEVT_TIMER, [this](wxTimerEvent &evt) { this->p->progressbar->Pulse(); });
+
+	Bind(EVT_AVRDUDE, [this](wxCommandEvent &evt) { this->p->on_avrdude(evt); });
+	Bind(EVT_ASYNC_DIALOG, [this](wxCommandEvent &evt) { this->p->on_async_dialog(evt); });
+
+	Bind(wxEVT_CLOSE_WINDOW, [this](wxCloseEvent &evt) {
+		if (this->p->avrdude) {
+			evt.Veto();
+		} else {
+			evt.Skip();
+		}
+	});
+
+	p->find_serial_ports();
+}
+
+FirmwareDialog::~FirmwareDialog()
+{
+	// Needed bacuse of forward defs
+}
+
+void FirmwareDialog::run(wxWindow *parent)
+{
+	FirmwareDialog dialog(parent);
+	dialog.ShowModal();
+}
+
+
+}

src/slic3r/GUI/FirmwareDialog.hpp

@@ -0,0 +1,31 @@
+#ifndef slic3r_FirmwareDialog_hpp_
+#define slic3r_FirmwareDialog_hpp_
+
+#include <memory>
+
+#include <wx/dialog.h>
+
+
+namespace Slic3r {
+
+
+class FirmwareDialog: public wxDialog
+{
+public:
+	FirmwareDialog(wxWindow *parent);
+	FirmwareDialog(FirmwareDialog &&) = delete;
+	FirmwareDialog(const FirmwareDialog &) = delete;
+	FirmwareDialog &operator=(FirmwareDialog &&) = delete;
+	FirmwareDialog &operator=(const FirmwareDialog &) = delete;
+	~FirmwareDialog();
+
+	static void run(wxWindow *parent);
+private:
+	struct priv;
+	std::unique_ptr<priv> p;
+};
+
+
+}
+
+#endif

src/slic3r/GUI/GLCanvas3D.hpp

@@ -0,0 +1,765 @@
+#ifndef slic3r_GLCanvas3D_hpp_
+#define slic3r_GLCanvas3D_hpp_
+
+#include "../../slic3r/GUI/3DScene.hpp"
+#include "../../slic3r/GUI/GLToolbar.hpp"
+
+class wxTimer;
+class wxSizeEvent;
+class wxIdleEvent;
+class wxKeyEvent;
+class wxMouseEvent;
+class wxTimerEvent;
+class wxPaintEvent;
+
+namespace Slic3r {
+
+class GLShader;
+class ExPolygon;
+
+namespace GUI {
+
+class GLGizmoBase;
+
+class GeometryBuffer
+{
+    std::vector<float> m_vertices;
+    std::vector<float> m_tex_coords;
+
+public:
+    bool set_from_triangles(const Polygons& triangles, float z, bool generate_tex_coords);
+    bool set_from_lines(const Lines& lines, float z);
+
+    const float* get_vertices() const;
+    const float* get_tex_coords() const;
+
+    unsigned int get_vertices_count() const;
+};
+
+class Size
+{
+    int m_width;
+    int m_height;
+
+public:
+    Size();
+    Size(int width, int height);
+
+    int get_width() const;
+    void set_width(int width);
+
+    int get_height() const;
+    void set_height(int height);
+};
+
+class Rect
+{
+    float m_left;
+    float m_top;
+    float m_right;
+    float m_bottom;
+
+public:
+    Rect();
+    Rect(float left, float top, float right, float bottom);
+
+    float get_left() const;
+    void set_left(float left);
+
+    float get_top() const;
+    void set_top(float top);
+
+    float get_right() const;
+    void set_right(float right);
+
+    float get_bottom() const;
+    void set_bottom(float bottom);
+};
+
+class GLCanvas3D
+{
+    struct GCodePreviewVolumeIndex
+    {
+        enum EType
+        {
+            Extrusion,
+            Travel,
+            Retraction,
+            Unretraction,
+            Shell,
+            Num_Geometry_Types
+        };
+
+        struct FirstVolume
+        {
+            EType type;
+            unsigned int flag;
+            // Index of the first volume in a GLVolumeCollection.
+            unsigned int id;
+
+            FirstVolume(EType type, unsigned int flag, unsigned int id) : type(type), flag(flag), id(id) {}
+        };
+
+        std::vector<FirstVolume> first_volumes;
+
+        void reset() { first_volumes.clear(); }
+    };
+
+    struct Camera
+    {
+        enum EType : unsigned char
+        {
+            Unknown,
+//            Perspective,
+            Ortho,
+            Num_types
+        };
+
+        EType type;
+        float zoom;
+        float phi;
+//        float distance;
+        Vec3d target;
+
+    private:
+        float m_theta;
+
+    public:
+        Camera();
+
+        std::string get_type_as_string() const;
+
+        float get_theta() const;
+        void set_theta(float theta);
+    };
+
+    class Bed
+    {
+    public:
+        enum EType : unsigned char
+        {
+            MK2,
+            MK3,
+            Custom,
+            Num_Types
+        };
+
+    private:
+        EType m_type;
+        Pointfs m_shape;
+        BoundingBoxf3 m_bounding_box;
+        Polygon m_polygon;
+        GeometryBuffer m_triangles;
+        GeometryBuffer m_gridlines;
+        mutable GLTexture m_top_texture;
+        mutable GLTexture m_bottom_texture;
+
+    public:
+        Bed();
+
+        bool is_prusa() const;
+        bool is_custom() const;
+
+        const Pointfs& get_shape() const;
+        // Return true if the bed shape changed, so the calee will update the UI.
+        bool set_shape(const Pointfs& shape);
+
+        const BoundingBoxf3& get_bounding_box() const;
+        bool contains(const Point& point) const;
+        Point point_projection(const Point& point) const;
+
+        void render(float theta) const;
+
+    private:
+        void _calc_bounding_box();
+        void _calc_triangles(const ExPolygon& poly);
+        void _calc_gridlines(const ExPolygon& poly, const BoundingBox& bed_bbox);
+        EType _detect_type() const;
+        void _render_mk2(float theta) const;
+        void _render_mk3(float theta) const;
+        void _render_prusa(float theta) const;
+        void _render_custom() const;
+        static bool _are_equal(const Pointfs& bed_1, const Pointfs& bed_2);
+    };
+
+    struct Axes
+    {
+        Vec3d origin;
+        float length;
+
+        Axes();
+
+        void render(bool depth_test) const;
+    };
+
+    class CuttingPlane
+    {
+        float m_z;
+        GeometryBuffer m_lines;
+
+    public:
+        CuttingPlane();
+
+        bool set(float z, const ExPolygons& polygons);
+
+        void render(const BoundingBoxf3& bb) const;
+
+    private:
+        void _render_plane(const BoundingBoxf3& bb) const;
+        void _render_contour() const;
+    };
+
+    class Shader
+    {
+        GLShader* m_shader;
+
+    public:
+        Shader();
+        ~Shader();
+
+        bool init(const std::string& vertex_shader_filename, const std::string& fragment_shader_filename);
+
+        bool is_initialized() const;
+
+        bool start_using() const;
+        void stop_using() const;
+
+        void set_uniform(const std::string& name, float value) const;
+        void set_uniform(const std::string& name, const float* matrix) const;
+
+        const GLShader* get_shader() const;
+
+    private:
+        void _reset();
+    };
+
+    class LayersEditing
+    {
+    public:
+        enum EState : unsigned char
+        {
+            Unknown,
+            Editing,
+            Completed,
+            Num_States
+        };
+
+    private:
+        bool m_use_legacy_opengl;
+        bool m_enabled;
+        Shader m_shader;
+        unsigned int m_z_texture_id;
+        mutable GLTexture m_tooltip_texture;
+        mutable GLTexture m_reset_texture;
+
+    public:
+        EState state;
+        float band_width;
+        float strength;
+        int last_object_id;
+        float last_z;
+        unsigned int last_action;
+
+        LayersEditing();
+        ~LayersEditing();
+
+        bool init(const std::string& vertex_shader_filename, const std::string& fragment_shader_filename);
+
+        bool is_allowed() const;
+        void set_use_legacy_opengl(bool use_legacy_opengl);
+
+        bool is_enabled() const;
+        void set_enabled(bool enabled);
+
+        unsigned int get_z_texture_id() const;
+
+        void render(const GLCanvas3D& canvas, const PrintObject& print_object, const GLVolume& volume) const;
+
+        int get_shader_program_id() const;
+
+        static float get_cursor_z_relative(const GLCanvas3D& canvas);
+        static bool bar_rect_contains(const GLCanvas3D& canvas, float x, float y);
+        static bool reset_rect_contains(const GLCanvas3D& canvas, float x, float y);
+        static Rect get_bar_rect_screen(const GLCanvas3D& canvas);
+        static Rect get_reset_rect_screen(const GLCanvas3D& canvas);
+        static Rect get_bar_rect_viewport(const GLCanvas3D& canvas);
+        static Rect get_reset_rect_viewport(const GLCanvas3D& canvas);
+
+    private:
+        bool _is_initialized() const;
+        void _render_tooltip_texture(const GLCanvas3D& canvas, const Rect& bar_rect, const Rect& reset_rect) const;
+        void _render_reset_texture(const Rect& reset_rect) const;
+        void _render_active_object_annotations(const GLCanvas3D& canvas, const GLVolume& volume, const PrintObject& print_object, const Rect& bar_rect) const;
+        void _render_profile(const PrintObject& print_object, const Rect& bar_rect) const;
+    };
+
+    struct Mouse
+    {
+        struct Drag
+        {
+            static const Point Invalid_2D_Point;
+            static const Vec3d Invalid_3D_Point;
+
+            Point start_position_2D;
+            Vec3d start_position_3D;
+            Vec3d volume_center_offset;
+
+            bool move_with_shift;
+            int move_volume_idx;
+            int gizmo_volume_idx;
+
+        public:
+            Drag();
+        };
+
+        bool dragging;
+        Vec2d position;
+        Drag drag;
+
+        Mouse();
+
+        void set_start_position_2D_as_invalid();
+        void set_start_position_3D_as_invalid();
+
+        bool is_start_position_2D_defined() const;
+        bool is_start_position_3D_defined() const;
+    };
+
+    class Gizmos
+    {
+        static const float OverlayTexturesScale;
+        static const float OverlayOffsetX;
+        static const float OverlayGapY;
+
+    public:
+        enum EType : unsigned char
+        {
+            Undefined,
+            Move,
+            Scale,
+            Rotate,
+            Flatten,
+            Num_Types
+        };
+
+    private:
+        bool m_enabled;
+        typedef std::map<EType, GLGizmoBase*> GizmosMap;
+        GizmosMap m_gizmos;
+        EType m_current;
+
+    public:
+        Gizmos();
+        ~Gizmos();
+
+        bool init(GLCanvas3D& parent);
+
+        bool is_enabled() const;
+        void set_enabled(bool enable);
+
+        void update_hover_state(const GLCanvas3D& canvas, const Vec2d& mouse_pos);
+        void update_on_off_state(const GLCanvas3D& canvas, const Vec2d& mouse_pos);
+        void reset_all_states();
+
+        void set_hover_id(int id);
+
+        bool overlay_contains_mouse(const GLCanvas3D& canvas, const Vec2d& mouse_pos) const;
+        bool grabber_contains_mouse() const;
+        void update(const Linef3& mouse_ray);
+
+        EType get_current_type() const;
+
+        bool is_running() const;
+
+        bool is_dragging() const;
+        void start_dragging(const BoundingBoxf3& box);
+        void stop_dragging();
+
+        Vec3d get_position() const;
+        void set_position(const Vec3d& position);
+
+        float get_scale() const;
+        void set_scale(float scale);
+
+        float get_angle_z() const;
+        void set_angle_z(float angle_z);
+
+        void set_flattening_data(const ModelObject* model_object);
+        Vec3d get_flattening_normal() const;
+
+        void render_current_gizmo(const BoundingBoxf3& box) const;
+
+        void render_current_gizmo_for_picking_pass(const BoundingBoxf3& box) const;
+        void render_overlay(const GLCanvas3D& canvas) const;
+
+    private:
+        void _reset();
+
+        void _render_overlay(const GLCanvas3D& canvas) const;
+        void _render_current_gizmo(const BoundingBoxf3& box) const;
+
+        float _get_total_overlay_height() const;
+        GLGizmoBase* _get_current() const;
+    };
+
+    class WarningTexture : public GUI::GLTexture
+    {
+        static const unsigned char Background_Color[3];
+        static const unsigned char Opacity;
+
+        int m_original_width;
+        int m_original_height;
+
+    public:
+        WarningTexture();
+
+        bool generate(const std::string& msg);
+
+        void render(const GLCanvas3D& canvas) const;
+    };
+
+    class LegendTexture : public GUI::GLTexture
+    {
+        static const int Px_Title_Offset = 5;
+        static const int Px_Text_Offset = 5;
+        static const int Px_Square = 20;
+        static const int Px_Square_Contour = 1;
+        static const int Px_Border = Px_Square / 2;
+        static const unsigned char Squares_Border_Color[3];
+        static const unsigned char Background_Color[3];
+        static const unsigned char Opacity;
+
+        int m_original_width;
+        int m_original_height;
+
+    public:
+        LegendTexture();
+
+        bool generate(const GCodePreviewData& preview_data, const std::vector<float>& tool_colors);
+
+        void render(const GLCanvas3D& canvas) const;
+    };
+
+    wxGLCanvas* m_canvas;
+    wxGLContext* m_context;
+    LegendTexture m_legend_texture;
+    WarningTexture m_warning_texture;
+    wxTimer* m_timer;
+    Camera m_camera;
+    Bed m_bed;
+    Axes m_axes;
+    CuttingPlane m_cutting_plane;
+    LayersEditing m_layers_editing;
+    Shader m_shader;
+    Mouse m_mouse;
+    mutable Gizmos m_gizmos;
+    mutable GLToolbar m_toolbar;
+
+    mutable GLVolumeCollection m_volumes;
+    DynamicPrintConfig* m_config;
+    Print* m_print;
+    Model* m_model;
+
+    bool m_dirty;
+    bool m_initialized;
+    bool m_use_VBOs;
+    bool m_force_zoom_to_bed_enabled;
+    bool m_apply_zoom_to_volumes_filter;
+    mutable int m_hover_volume_id;
+    bool m_toolbar_action_running;
+    bool m_warning_texture_enabled;
+    bool m_legend_texture_enabled;
+    bool m_picking_enabled;
+    bool m_moving_enabled;
+    bool m_shader_enabled;
+    bool m_dynamic_background_enabled;
+    bool m_multisample_allowed;
+
+    std::string m_color_by;
+    std::string m_select_by;
+    std::string m_drag_by;
+
+    bool m_reload_delayed;
+    std::vector<std::vector<int>> m_objects_volumes_idxs;
+    std::vector<int> m_objects_selections;
+
+    GCodePreviewVolumeIndex m_gcode_preview_volume_index;
+
+    PerlCallback m_on_viewport_changed_callback;
+    PerlCallback m_on_double_click_callback;
+    PerlCallback m_on_right_click_callback;
+    PerlCallback m_on_select_object_callback;
+    PerlCallback m_on_model_update_callback;
+    PerlCallback m_on_remove_object_callback;
+    PerlCallback m_on_arrange_callback;
+    PerlCallback m_on_rotate_object_left_callback;
+    PerlCallback m_on_rotate_object_right_callback;
+    PerlCallback m_on_scale_object_uniformly_callback;
+    PerlCallback m_on_increase_objects_callback;
+    PerlCallback m_on_decrease_objects_callback;
+    PerlCallback m_on_instance_moved_callback;
+    PerlCallback m_on_wipe_tower_moved_callback;
+    PerlCallback m_on_enable_action_buttons_callback;
+    PerlCallback m_on_gizmo_scale_uniformly_callback;
+    PerlCallback m_on_gizmo_rotate_callback;
+    PerlCallback m_on_gizmo_flatten_callback;
+    PerlCallback m_on_update_geometry_info_callback;
+
+    PerlCallback m_action_add_callback;
+    PerlCallback m_action_delete_callback;
+    PerlCallback m_action_deleteall_callback;
+    PerlCallback m_action_arrange_callback;
+    PerlCallback m_action_more_callback;
+    PerlCallback m_action_fewer_callback;
+    PerlCallback m_action_split_callback;
+    PerlCallback m_action_cut_callback;
+    PerlCallback m_action_settings_callback;
+    PerlCallback m_action_layersediting_callback;
+    PerlCallback m_action_selectbyparts_callback;
+
+public:
+    GLCanvas3D(wxGLCanvas* canvas);
+    ~GLCanvas3D();
+
+    bool init(bool useVBOs, bool use_legacy_opengl);
+
+    bool set_current();
+
+    void set_as_dirty();
+
+    unsigned int get_volumes_count() const;
+    void reset_volumes();
+    void deselect_volumes();
+    void select_volume(unsigned int id);
+    void update_volumes_selection(const std::vector<int>& selections);
+    int check_volumes_outside_state(const DynamicPrintConfig* config) const;
+    bool move_volume_up(unsigned int id);
+    bool move_volume_down(unsigned int id);
+
+    void set_objects_selections(const std::vector<int>& selections);
+
+    void set_config(DynamicPrintConfig* config);
+    void set_print(Print* print);
+    void set_model(Model* model);
+
+    // Set the bed shape to a single closed 2D polygon(array of two element arrays),
+    // triangulate the bed and store the triangles into m_bed.m_triangles,
+    // fills the m_bed.m_grid_lines and sets m_bed.m_origin.
+    // Sets m_bed.m_polygon to limit the object placement.
+    void set_bed_shape(const Pointfs& shape);
+    // Used by ObjectCutDialog and ObjectPartsPanel to generate a rectangular ground plane to support the scene objects.
+    void set_auto_bed_shape();
+
+    void set_axes_length(float length);
+
+    void set_cutting_plane(float z, const ExPolygons& polygons);
+
+    void set_color_by(const std::string& value);
+    void set_select_by(const std::string& value);
+    void set_drag_by(const std::string& value);
+
+    const std::string& get_select_by() const;
+    const std::string& get_drag_by() const;
+
+    float get_camera_zoom() const;
+
+    BoundingBoxf3 volumes_bounding_box() const;
+
+    bool is_layers_editing_enabled() const;
+    bool is_layers_editing_allowed() const;
+    bool is_shader_enabled() const;
+
+    bool is_reload_delayed() const;
+
+    void enable_layers_editing(bool enable);
+    void enable_warning_texture(bool enable);
+    void enable_legend_texture(bool enable);
+    void enable_picking(bool enable);
+    void enable_moving(bool enable);
+    void enable_gizmos(bool enable);
+    void enable_toolbar(bool enable);
+    void enable_shader(bool enable);
+    void enable_force_zoom_to_bed(bool enable);
+    void enable_dynamic_background(bool enable);
+    void allow_multisample(bool allow);
+
+    void enable_toolbar_item(const std::string& name, bool enable);
+    bool is_toolbar_item_pressed(const std::string& name) const;
+
+    void zoom_to_bed();
+    void zoom_to_volumes();
+    void select_view(const std::string& direction);
+    void set_viewport_from_scene(const GLCanvas3D& other);
+
+    void update_volumes_colors_by_extruder();
+    void update_gizmos_data();
+
+    void render();
+
+    std::vector<double> get_current_print_zs(bool active_only) const;
+    void set_toolpaths_range(double low, double high);
+
+    std::vector<int> load_object(const ModelObject& model_object, int obj_idx, std::vector<int> instance_idxs);
+    std::vector<int> load_object(const Model& model, int obj_idx);
+
+    int get_first_volume_id(int obj_idx) const;
+    int get_in_object_volume_id(int scene_vol_idx) const;
+
+    void reload_scene(bool force);
+
+    void load_gcode_preview(const GCodePreviewData& preview_data, const std::vector<std::string>& str_tool_colors);
+    void load_preview(const std::vector<std::string>& str_tool_colors);
+
+    void register_on_viewport_changed_callback(void* callback);
+    void register_on_double_click_callback(void* callback);
+    void register_on_right_click_callback(void* callback);
+    void register_on_select_object_callback(void* callback);
+    void register_on_model_update_callback(void* callback);
+    void register_on_remove_object_callback(void* callback);
+    void register_on_arrange_callback(void* callback);
+    void register_on_rotate_object_left_callback(void* callback);
+    void register_on_rotate_object_right_callback(void* callback);
+    void register_on_scale_object_uniformly_callback(void* callback);
+    void register_on_increase_objects_callback(void* callback);
+    void register_on_decrease_objects_callback(void* callback);
+    void register_on_instance_moved_callback(void* callback);
+    void register_on_wipe_tower_moved_callback(void* callback);
+    void register_on_enable_action_buttons_callback(void* callback);
+    void register_on_gizmo_scale_uniformly_callback(void* callback);
+    void register_on_gizmo_rotate_callback(void* callback);
+    void register_on_gizmo_flatten_callback(void* callback);
+    void register_on_update_geometry_info_callback(void* callback);
+
+    void register_action_add_callback(void* callback);
+    void register_action_delete_callback(void* callback);
+    void register_action_deleteall_callback(void* callback);
+    void register_action_arrange_callback(void* callback);
+    void register_action_more_callback(void* callback);
+    void register_action_fewer_callback(void* callback);
+    void register_action_split_callback(void* callback);
+    void register_action_cut_callback(void* callback);
+    void register_action_settings_callback(void* callback);
+    void register_action_layersediting_callback(void* callback);
+    void register_action_selectbyparts_callback(void* callback);
+
+    void bind_event_handlers();
+    void unbind_event_handlers();
+
+    void on_size(wxSizeEvent& evt);
+    void on_idle(wxIdleEvent& evt);
+    void on_char(wxKeyEvent& evt);
+    void on_mouse_wheel(wxMouseEvent& evt);
+    void on_timer(wxTimerEvent& evt);
+    void on_mouse(wxMouseEvent& evt);
+    void on_paint(wxPaintEvent& evt);
+    void on_key_down(wxKeyEvent& evt);
+
+    Size get_canvas_size() const;
+    Point get_local_mouse_position() const;
+
+    void reset_legend_texture();
+
+    void set_tooltip(const std::string& tooltip);
+
+private:
+    bool _is_shown_on_screen() const;
+    void _force_zoom_to_bed();
+
+    bool _init_toolbar();
+
+    void _resize(unsigned int w, unsigned int h);
+
+    BoundingBoxf3 _max_bounding_box() const;
+    BoundingBoxf3 _selected_volumes_bounding_box() const;
+
+    void _zoom_to_bounding_box(const BoundingBoxf3& bbox);
+    float _get_zoom_to_bounding_box_factor(const BoundingBoxf3& bbox) const;
+
+    void _deregister_callbacks();
+
+    void _mark_volumes_for_layer_height() const;
+    void _refresh_if_shown_on_screen();
+
+    void _camera_tranform() const;
+    void _picking_pass() const;
+    void _render_background() const;
+    void _render_bed(float theta) const;
+    void _render_axes(bool depth_test) const;
+    void _render_objects() const;
+    void _render_cutting_plane() const;
+    void _render_warning_texture() const;
+    void _render_legend_texture() const;
+    void _render_layer_editing_overlay() const;
+    void _render_volumes(bool fake_colors) const;
+    void _render_current_gizmo() const;
+    void _render_gizmos_overlay() const;
+    void _render_toolbar() const;
+
+    float _get_layers_editing_cursor_z_relative() const;
+    void _perform_layer_editing_action(wxMouseEvent* evt = nullptr);
+
+    // Convert the screen space coordinate to an object space coordinate.
+    // If the Z screen space coordinate is not provided, a depth buffer value is substituted.
+    Vec3d _mouse_to_3d(const Point& mouse_pos, float* z = nullptr);
+
+    // Convert the screen space coordinate to world coordinate on the bed.
+    Vec3d _mouse_to_bed_3d(const Point& mouse_pos);
+
+    // Returns the view ray line, in world coordinate, at the given mouse position.
+    Linef3 mouse_ray(const Point& mouse_pos);
+
+    void _start_timer();
+    void _stop_timer();
+
+    int _get_first_selected_object_id() const;
+    int _get_first_selected_volume_id(int object_id) const;
+
+    // Create 3D thick extrusion lines for a skirt and brim.
+    // Adds a new Slic3r::GUI::3DScene::Volume to volumes.
+    void _load_print_toolpaths();
+    // Create 3D thick extrusion lines for object forming extrusions.
+    // Adds a new Slic3r::GUI::3DScene::Volume to $self->volumes,
+    // one for perimeters, one for infill and one for supports.
+    void _load_print_object_toolpaths(const PrintObject& print_object, const std::vector<std::string>& str_tool_colors);
+    // Create 3D thick extrusion lines for wipe tower extrusions
+    void _load_wipe_tower_toolpaths(const std::vector<std::string>& str_tool_colors);
+
+    // generates gcode extrusion paths geometry
+    void _load_gcode_extrusion_paths(const GCodePreviewData& preview_data, const std::vector<float>& tool_colors);
+    // generates gcode travel paths geometry
+    void _load_gcode_travel_paths(const GCodePreviewData& preview_data, const std::vector<float>& tool_colors);
+    bool _travel_paths_by_type(const GCodePreviewData& preview_data);
+    bool _travel_paths_by_feedrate(const GCodePreviewData& preview_data);
+    bool _travel_paths_by_tool(const GCodePreviewData& preview_data, const std::vector<float>& tool_colors);
+    // generates gcode retractions geometry
+    void _load_gcode_retractions(const GCodePreviewData& preview_data);
+    // generates gcode unretractions geometry
+    void _load_gcode_unretractions(const GCodePreviewData& preview_data);
+    // generates objects and wipe tower geometry
+    void _load_shells();
+    // sets gcode geometry visibility according to user selection
+    void _update_gcode_volumes_visibility(const GCodePreviewData& preview_data);
+    void _update_toolpath_volumes_outside_state();
+    void _show_warning_texture_if_needed();
+
+    void _on_move(const std::vector<int>& volume_idxs);
+    void _on_select(int volume_idx, int object_idx);
+
+    // generates the legend texture in dependence of the current shown view type
+    void _generate_legend_texture(const GCodePreviewData& preview_data, const std::vector<float>& tool_colors);
+
+    // generates a warning texture containing the given message
+    void _generate_warning_texture(const std::string& msg);
+    void _reset_warning_texture();
+
+    bool _is_any_volume_outside() const;
+
+    void _resize_toolbar() const;
+
+    static std::vector<float> _parse_colors(const std::vector<std::string>& colors);
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif // slic3r_GLCanvas3D_hpp_

src/slic3r/GUI/GLCanvas3DManager.cpp

@@ -0,0 +1,819 @@
+#include "GLCanvas3DManager.hpp"
+#include "../../slic3r/GUI/GUI.hpp"
+#include "../../slic3r/GUI/AppConfig.hpp"
+#include "../../slic3r/GUI/GLCanvas3D.hpp"
+
+#include <GL/glew.h>
+
+#include <boost/algorithm/string/split.hpp>
+#include <boost/algorithm/string/classification.hpp>
+
+#include <wx/glcanvas.h>
+#include <wx/timer.h>
+
+#include <vector>
+#include <string>
+#include <iostream>
+
+namespace Slic3r {
+namespace GUI {
+
+GLCanvas3DManager::GLInfo::GLInfo()
+    : version("")
+    , glsl_version("")
+    , vendor("")
+    , renderer("")
+{
+}
+
+void GLCanvas3DManager::GLInfo::detect()
+{
+    const char* data = (const char*)::glGetString(GL_VERSION);
+    if (data != nullptr)
+        version = data;
+
+    data = (const char*)::glGetString(GL_SHADING_LANGUAGE_VERSION);
+    if (data != nullptr)
+        glsl_version = data;
+
+    data = (const char*)::glGetString(GL_VENDOR);
+    if (data != nullptr)
+        vendor = data;
+
+    data = (const char*)::glGetString(GL_RENDERER);
+    if (data != nullptr)
+        renderer = data;
+}
+
+bool GLCanvas3DManager::GLInfo::is_version_greater_or_equal_to(unsigned int major, unsigned int minor) const
+{
+    std::vector<std::string> tokens;
+    boost::split(tokens, version, boost::is_any_of(" "), boost::token_compress_on);
+
+    if (tokens.empty())
+        return false;
+
+    std::vector<std::string> numbers;
+    boost::split(numbers, tokens[0], boost::is_any_of("."), boost::token_compress_on);
+
+    unsigned int gl_major = 0;
+    unsigned int gl_minor = 0;
+
+    if (numbers.size() > 0)
+        gl_major = ::atoi(numbers[0].c_str());
+
+    if (numbers.size() > 1)
+        gl_minor = ::atoi(numbers[1].c_str());
+
+    if (gl_major < major)
+        return false;
+    else if (gl_major > major)
+        return true;
+    else
+        return gl_minor >= minor;
+}
+
+std::string GLCanvas3DManager::GLInfo::to_string(bool format_as_html, bool extensions) const
+{
+    std::stringstream out;
+
+    std::string h2_start = format_as_html ? "<b>" : "";
+    std::string h2_end = format_as_html ? "</b>" : "";
+    std::string b_start = format_as_html ? "<b>" : "";
+    std::string b_end = format_as_html ? "</b>" : "";
+    std::string line_end = format_as_html ? "<br>" : "\n";
+
+    out << h2_start << "OpenGL installation" << h2_end << line_end;
+    out << b_start << "GL version:   " << b_end << (version.empty() ? "N/A" : version) << line_end;
+    out << b_start << "Vendor:       " << b_end << (vendor.empty() ? "N/A" : vendor) << line_end;
+    out << b_start << "Renderer:     " << b_end << (renderer.empty() ? "N/A" : renderer) << line_end;
+    out << b_start << "GLSL version: " << b_end << (glsl_version.empty() ? "N/A" : glsl_version) << line_end;
+
+    if (extensions)
+    {
+        std::vector<std::string> extensions_list;
+        std::string extensions_str = (const char*)::glGetString(GL_EXTENSIONS);
+        boost::split(extensions_list, extensions_str, boost::is_any_of(" "), boost::token_compress_off);
+
+        if (!extensions_list.empty())
+        {
+            out << h2_start << "Installed extensions:" << h2_end << line_end;
+
+            std::sort(extensions_list.begin(), extensions_list.end());
+            for (const std::string& ext : extensions_list)
+            {
+                out << ext << line_end;
+            }
+        }
+    }
+
+    return out.str();
+}
+
+GLCanvas3DManager::GLCanvas3DManager()
+    : m_current(nullptr)
+    , m_gl_initialized(false)
+    , m_use_legacy_opengl(false)
+    , m_use_VBOs(false)
+{
+}
+
+bool GLCanvas3DManager::add(wxGLCanvas* canvas)
+{
+    if (canvas == nullptr)
+        return false;
+
+    if (_get_canvas(canvas) != m_canvases.end())
+        return false;
+
+    GLCanvas3D* canvas3D = new GLCanvas3D(canvas);
+    if (canvas3D == nullptr)
+        return false;
+
+    canvas3D->bind_event_handlers();
+    m_canvases.insert(CanvasesMap::value_type(canvas, canvas3D));
+
+    return true;
+}
+
+bool GLCanvas3DManager::remove(wxGLCanvas* canvas)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it == m_canvases.end())
+        return false;
+
+    it->second->unbind_event_handlers();
+    delete it->second;
+    m_canvases.erase(it);
+
+    return true;
+}
+
+void GLCanvas3DManager::remove_all()
+{
+    for (CanvasesMap::value_type& item : m_canvases)
+    {
+        item.second->unbind_event_handlers();
+        delete item.second;
+    }
+    m_canvases.clear();
+}
+
+unsigned int GLCanvas3DManager::count() const
+{
+    return (unsigned int)m_canvases.size();
+}
+
+void GLCanvas3DManager::init_gl()
+{
+    if (!m_gl_initialized)
+    {
+        glewInit();
+        m_gl_info.detect();
+        const AppConfig* config = GUI::get_app_config();
+        m_use_legacy_opengl = (config == nullptr) || (config->get("use_legacy_opengl") == "1");
+        m_use_VBOs = !m_use_legacy_opengl && m_gl_info.is_version_greater_or_equal_to(2, 0);
+        m_gl_initialized = true;
+    }
+}
+
+std::string GLCanvas3DManager::get_gl_info(bool format_as_html, bool extensions) const
+{
+    return m_gl_info.to_string(format_as_html, extensions);
+}
+
+bool GLCanvas3DManager::use_VBOs() const
+{
+    return m_use_VBOs;
+}
+
+bool GLCanvas3DManager::init(wxGLCanvas* canvas)
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        return (it->second != nullptr) ? _init(*it->second) : false;
+    else
+        return false;
+}
+
+void GLCanvas3DManager::set_as_dirty(wxGLCanvas* canvas)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_as_dirty();
+}
+
+unsigned int GLCanvas3DManager::get_volumes_count(wxGLCanvas* canvas) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->get_volumes_count() : 0;
+}
+
+void GLCanvas3DManager::reset_volumes(wxGLCanvas* canvas)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->reset_volumes();
+}
+
+void GLCanvas3DManager::deselect_volumes(wxGLCanvas* canvas)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->deselect_volumes();
+}
+
+void GLCanvas3DManager::select_volume(wxGLCanvas* canvas, unsigned int id)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->select_volume(id);
+}
+
+void GLCanvas3DManager::update_volumes_selection(wxGLCanvas* canvas, const std::vector<int>& selections)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->update_volumes_selection(selections);
+}
+
+int GLCanvas3DManager::check_volumes_outside_state(wxGLCanvas* canvas, const DynamicPrintConfig* config) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->check_volumes_outside_state(config) : false;
+}
+
+bool GLCanvas3DManager::move_volume_up(wxGLCanvas* canvas, unsigned int id)
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->move_volume_up(id) : false;
+}
+
+bool GLCanvas3DManager::move_volume_down(wxGLCanvas* canvas, unsigned int id)
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->move_volume_down(id) : false;
+}
+
+void GLCanvas3DManager::set_objects_selections(wxGLCanvas* canvas, const std::vector<int>& selections)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_objects_selections(selections);
+}
+
+void GLCanvas3DManager::set_config(wxGLCanvas* canvas, DynamicPrintConfig* config)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_config(config);
+}
+
+void GLCanvas3DManager::set_print(wxGLCanvas* canvas, Print* print)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_print(print);
+}
+
+void GLCanvas3DManager::set_model(wxGLCanvas* canvas, Model* model)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_model(model);
+}
+
+void GLCanvas3DManager::set_bed_shape(wxGLCanvas* canvas, const Pointfs& shape)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_bed_shape(shape);
+}
+
+void GLCanvas3DManager::set_auto_bed_shape(wxGLCanvas* canvas)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_auto_bed_shape();
+}
+
+BoundingBoxf3 GLCanvas3DManager::get_volumes_bounding_box(wxGLCanvas* canvas)
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->volumes_bounding_box() : BoundingBoxf3();
+}
+
+void GLCanvas3DManager::set_axes_length(wxGLCanvas* canvas, float length)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_axes_length(length);
+}
+
+void GLCanvas3DManager::set_cutting_plane(wxGLCanvas* canvas, float z, const ExPolygons& polygons)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_cutting_plane(z, polygons);
+}
+
+void GLCanvas3DManager::set_color_by(wxGLCanvas* canvas, const std::string& value)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_color_by(value);
+}
+
+void GLCanvas3DManager::set_select_by(wxGLCanvas* canvas, const std::string& value)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_select_by(value);
+}
+
+void GLCanvas3DManager::set_drag_by(wxGLCanvas* canvas, const std::string& value)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_drag_by(value);
+}
+
+std::string GLCanvas3DManager::get_select_by(wxGLCanvas* canvas) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->get_select_by() : "";
+}
+
+bool GLCanvas3DManager::is_layers_editing_enabled(wxGLCanvas* canvas) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->is_layers_editing_enabled() : false;
+}
+
+bool GLCanvas3DManager::is_layers_editing_allowed(wxGLCanvas* canvas) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->is_layers_editing_allowed() : false;
+}
+
+bool GLCanvas3DManager::is_shader_enabled(wxGLCanvas* canvas) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->is_shader_enabled() : false;
+}
+
+bool GLCanvas3DManager::is_reload_delayed(wxGLCanvas* canvas) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->is_reload_delayed() : false;
+}
+
+void GLCanvas3DManager::enable_layers_editing(wxGLCanvas* canvas, bool enable)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->enable_layers_editing(enable);
+}
+
+void GLCanvas3DManager::enable_warning_texture(wxGLCanvas* canvas, bool enable)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->enable_warning_texture(enable);
+}
+
+void GLCanvas3DManager::enable_legend_texture(wxGLCanvas* canvas, bool enable)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->enable_legend_texture(enable);
+}
+
+void GLCanvas3DManager::enable_picking(wxGLCanvas* canvas, bool enable)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->enable_picking(enable);
+}
+
+void GLCanvas3DManager::enable_moving(wxGLCanvas* canvas, bool enable)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->enable_moving(enable);
+}
+
+void GLCanvas3DManager::enable_gizmos(wxGLCanvas* canvas, bool enable)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->enable_gizmos(enable);
+}
+
+void GLCanvas3DManager::enable_toolbar(wxGLCanvas* canvas, bool enable)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->enable_toolbar(enable);
+}
+
+void GLCanvas3DManager::enable_shader(wxGLCanvas* canvas, bool enable)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->enable_shader(enable);
+}
+
+void GLCanvas3DManager::enable_force_zoom_to_bed(wxGLCanvas* canvas, bool enable)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->enable_force_zoom_to_bed(enable);
+}
+
+void GLCanvas3DManager::enable_dynamic_background(wxGLCanvas* canvas, bool enable)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->enable_dynamic_background(enable);
+}
+
+void GLCanvas3DManager::allow_multisample(wxGLCanvas* canvas, bool allow)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->allow_multisample(allow);
+}
+
+void GLCanvas3DManager::enable_toolbar_item(wxGLCanvas* canvas, const std::string& name, bool enable)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->enable_toolbar_item(name, enable);
+}
+
+bool GLCanvas3DManager::is_toolbar_item_pressed(wxGLCanvas* canvas, const std::string& name) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->is_toolbar_item_pressed(name) : false;
+}
+
+void GLCanvas3DManager::zoom_to_bed(wxGLCanvas* canvas)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->zoom_to_bed();
+}
+
+void GLCanvas3DManager::zoom_to_volumes(wxGLCanvas* canvas)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->zoom_to_volumes();
+}
+
+void GLCanvas3DManager::select_view(wxGLCanvas* canvas, const std::string& direction)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->select_view(direction);
+}
+
+void GLCanvas3DManager::set_viewport_from_scene(wxGLCanvas* canvas, wxGLCanvas* other)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+    {
+        CanvasesMap::iterator other_it = _get_canvas(other);
+        if (other_it != m_canvases.end())
+            it->second->set_viewport_from_scene(*other_it->second);
+    }
+}
+
+void GLCanvas3DManager::update_volumes_colors_by_extruder(wxGLCanvas* canvas)
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->update_volumes_colors_by_extruder();
+}
+
+void GLCanvas3DManager::update_gizmos_data(wxGLCanvas* canvas)
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->update_gizmos_data();
+}
+
+void GLCanvas3DManager::render(wxGLCanvas* canvas) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->render();
+}
+
+std::vector<double> GLCanvas3DManager::get_current_print_zs(wxGLCanvas* canvas, bool active_only) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->get_current_print_zs(active_only) : std::vector<double>();
+}
+
+void GLCanvas3DManager::set_toolpaths_range(wxGLCanvas* canvas, double low, double high)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->set_toolpaths_range(low, high);
+}
+
+std::vector<int> GLCanvas3DManager::load_object(wxGLCanvas* canvas, const ModelObject* model_object, int obj_idx, std::vector<int> instance_idxs)
+{
+    if (model_object == nullptr)
+        return std::vector<int>();
+
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->load_object(*model_object, obj_idx, instance_idxs) : std::vector<int>();
+}
+
+std::vector<int> GLCanvas3DManager::load_object(wxGLCanvas* canvas, const Model* model, int obj_idx)
+{
+    if (model == nullptr)
+        return std::vector<int>();
+
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->load_object(*model, obj_idx) : std::vector<int>();
+}
+
+int GLCanvas3DManager::get_first_volume_id(wxGLCanvas* canvas, int obj_idx) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->get_first_volume_id(obj_idx) : -1;
+}
+
+int GLCanvas3DManager::get_in_object_volume_id(wxGLCanvas* canvas, int scene_vol_idx) const
+{
+    CanvasesMap::const_iterator it = _get_canvas(canvas);
+    return (it != m_canvases.end()) ? it->second->get_in_object_volume_id(scene_vol_idx) : -1;
+}
+
+void GLCanvas3DManager::reload_scene(wxGLCanvas* canvas, bool force)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->reload_scene(force);
+}
+
+void GLCanvas3DManager::load_gcode_preview(wxGLCanvas* canvas, const GCodePreviewData* preview_data, const std::vector<std::string>& str_tool_colors)
+{
+    if (preview_data == nullptr)
+        return;
+
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->load_gcode_preview(*preview_data, str_tool_colors);
+}
+
+void GLCanvas3DManager::load_preview(wxGLCanvas* canvas, const std::vector<std::string>& str_tool_colors)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->load_preview(str_tool_colors);
+}
+
+void GLCanvas3DManager::reset_legend_texture()
+{
+    for (CanvasesMap::value_type& canvas : m_canvases)
+    {
+        if (canvas.second != nullptr)
+            canvas.second->reset_legend_texture();
+    }
+}
+
+void GLCanvas3DManager::register_on_viewport_changed_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_viewport_changed_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_double_click_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_double_click_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_right_click_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_right_click_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_select_object_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_select_object_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_model_update_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_model_update_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_remove_object_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_remove_object_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_arrange_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_arrange_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_rotate_object_left_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_rotate_object_left_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_rotate_object_right_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_rotate_object_right_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_scale_object_uniformly_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_scale_object_uniformly_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_increase_objects_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_increase_objects_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_decrease_objects_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_decrease_objects_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_instance_moved_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_instance_moved_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_wipe_tower_moved_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_wipe_tower_moved_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_enable_action_buttons_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_enable_action_buttons_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_gizmo_scale_uniformly_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_gizmo_scale_uniformly_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_gizmo_rotate_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_gizmo_rotate_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_gizmo_flatten_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_gizmo_flatten_callback(callback);
+}
+
+void GLCanvas3DManager::register_on_update_geometry_info_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_on_update_geometry_info_callback(callback);
+}
+
+void GLCanvas3DManager::register_action_add_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_action_add_callback(callback);
+}
+
+void GLCanvas3DManager::register_action_delete_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_action_delete_callback(callback);
+}
+
+void GLCanvas3DManager::register_action_deleteall_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_action_deleteall_callback(callback);
+}
+
+void GLCanvas3DManager::register_action_arrange_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_action_arrange_callback(callback);
+}
+
+void GLCanvas3DManager::register_action_more_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_action_more_callback(callback);
+}
+
+void GLCanvas3DManager::register_action_fewer_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_action_fewer_callback(callback);
+}
+
+void GLCanvas3DManager::register_action_split_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_action_split_callback(callback);
+}
+
+void GLCanvas3DManager::register_action_cut_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_action_cut_callback(callback);
+}
+
+void GLCanvas3DManager::register_action_settings_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_action_settings_callback(callback);
+}
+
+void GLCanvas3DManager::register_action_layersediting_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_action_layersediting_callback(callback);
+}
+
+void GLCanvas3DManager::register_action_selectbyparts_callback(wxGLCanvas* canvas, void* callback)
+{
+    CanvasesMap::iterator it = _get_canvas(canvas);
+    if (it != m_canvases.end())
+        it->second->register_action_selectbyparts_callback(callback);
+}
+
+GLCanvas3DManager::CanvasesMap::iterator GLCanvas3DManager::_get_canvas(wxGLCanvas* canvas)
+{
+    return (canvas == nullptr) ? m_canvases.end() : m_canvases.find(canvas);
+}
+
+GLCanvas3DManager::CanvasesMap::const_iterator GLCanvas3DManager::_get_canvas(wxGLCanvas* canvas) const
+{
+    return (canvas == nullptr) ? m_canvases.end() : m_canvases.find(canvas);
+}
+
+bool GLCanvas3DManager::_init(GLCanvas3D& canvas)
+{
+    if (!m_gl_initialized)
+        init_gl();
+
+    return canvas.init(m_use_VBOs, m_use_legacy_opengl);
+}
+
+} // namespace GUI
+} // namespace Slic3r

src/slic3r/GUI/GLCanvas3DManager.hpp

@@ -0,0 +1,192 @@
+#ifndef slic3r_GLCanvas3DManager_hpp_
+#define slic3r_GLCanvas3DManager_hpp_
+
+#include "../../libslic3r/BoundingBox.hpp"
+
+#include <map>
+#include <vector>
+
+class wxGLCanvas;
+class wxGLContext;
+
+namespace Slic3r {
+
+class DynamicPrintConfig;
+class Print;
+class Model;
+class ExPolygon;
+typedef std::vector<ExPolygon> ExPolygons;
+class ModelObject;
+class PrintObject;
+class GCodePreviewData;
+    
+namespace GUI {
+
+class GLCanvas3D;
+
+class GLCanvas3DManager
+{
+    struct GLInfo
+    {
+        std::string version;
+        std::string glsl_version;
+        std::string vendor;
+        std::string renderer;
+
+        GLInfo();
+
+        void detect();
+        bool is_version_greater_or_equal_to(unsigned int major, unsigned int minor) const;
+
+        std::string to_string(bool format_as_html, bool extensions) const;
+    };
+
+    typedef std::map<wxGLCanvas*, GLCanvas3D*> CanvasesMap;
+
+    CanvasesMap m_canvases;
+    wxGLCanvas* m_current;
+    GLInfo m_gl_info;
+    bool m_gl_initialized;
+    bool m_use_legacy_opengl;
+    bool m_use_VBOs;
+
+public:
+    GLCanvas3DManager();
+
+    bool add(wxGLCanvas* canvas);
+    bool remove(wxGLCanvas* canvas);
+
+    void remove_all();
+
+    unsigned int count() const;
+
+    void init_gl();
+    std::string get_gl_info(bool format_as_html, bool extensions) const;
+
+    bool use_VBOs() const;
+    bool layer_editing_allowed() const;
+
+    bool init(wxGLCanvas* canvas);
+
+    void set_as_dirty(wxGLCanvas* canvas);
+
+    unsigned int get_volumes_count(wxGLCanvas* canvas) const;
+    void reset_volumes(wxGLCanvas* canvas);
+    void deselect_volumes(wxGLCanvas* canvas);
+    void select_volume(wxGLCanvas* canvas, unsigned int id);
+    void update_volumes_selection(wxGLCanvas* canvas, const std::vector<int>& selections);
+    int check_volumes_outside_state(wxGLCanvas* canvas, const DynamicPrintConfig* config) const;
+    bool move_volume_up(wxGLCanvas* canvas, unsigned int id);
+    bool move_volume_down(wxGLCanvas* canvas, unsigned int id);
+
+    void set_objects_selections(wxGLCanvas* canvas, const std::vector<int>& selections);
+
+    void set_config(wxGLCanvas* canvas, DynamicPrintConfig* config);
+    void set_print(wxGLCanvas* canvas, Print* print);
+    void set_model(wxGLCanvas* canvas, Model* model);
+
+    void set_bed_shape(wxGLCanvas* canvas, const Pointfs& shape);
+    void set_auto_bed_shape(wxGLCanvas* canvas);
+
+    BoundingBoxf3 get_volumes_bounding_box(wxGLCanvas* canvas);
+
+    void set_axes_length(wxGLCanvas* canvas, float length);
+
+    void set_cutting_plane(wxGLCanvas* canvas, float z, const ExPolygons& polygons);
+
+    void set_color_by(wxGLCanvas* canvas, const std::string& value);
+    void set_select_by(wxGLCanvas* canvas, const std::string& value);
+    void set_drag_by(wxGLCanvas* canvas, const std::string& value);
+
+    std::string get_select_by(wxGLCanvas* canvas) const;
+
+    bool is_layers_editing_enabled(wxGLCanvas* canvas) const;
+    bool is_layers_editing_allowed(wxGLCanvas* canvas) const;
+    bool is_shader_enabled(wxGLCanvas* canvas) const;
+
+    bool is_reload_delayed(wxGLCanvas* canvas) const;
+
+    void enable_layers_editing(wxGLCanvas* canvas, bool enable);
+    void enable_warning_texture(wxGLCanvas* canvas, bool enable);
+    void enable_legend_texture(wxGLCanvas* canvas, bool enable);
+    void enable_picking(wxGLCanvas* canvas, bool enable);
+    void enable_moving(wxGLCanvas* canvas, bool enable);
+    void enable_gizmos(wxGLCanvas* canvas, bool enable);
+    void enable_toolbar(wxGLCanvas* canvas, bool enable);
+    void enable_shader(wxGLCanvas* canvas, bool enable);
+    void enable_force_zoom_to_bed(wxGLCanvas* canvas, bool enable);
+    void enable_dynamic_background(wxGLCanvas* canvas, bool enable);
+    void allow_multisample(wxGLCanvas* canvas, bool allow);
+
+    void enable_toolbar_item(wxGLCanvas* canvas, const std::string& name, bool enable);
+    bool is_toolbar_item_pressed(wxGLCanvas* canvas, const std::string& name) const;
+
+    void zoom_to_bed(wxGLCanvas* canvas);
+    void zoom_to_volumes(wxGLCanvas* canvas);
+    void select_view(wxGLCanvas* canvas, const std::string& direction);
+    void set_viewport_from_scene(wxGLCanvas* canvas, wxGLCanvas* other);
+
+    void update_volumes_colors_by_extruder(wxGLCanvas* canvas);
+    void update_gizmos_data(wxGLCanvas* canvas);
+
+    void render(wxGLCanvas* canvas) const;
+
+    std::vector<double> get_current_print_zs(wxGLCanvas* canvas, bool active_only) const;
+    void set_toolpaths_range(wxGLCanvas* canvas, double low, double high);
+
+    std::vector<int> load_object(wxGLCanvas* canvas, const ModelObject* model_object, int obj_idx, std::vector<int> instance_idxs);
+    std::vector<int> load_object(wxGLCanvas* canvas, const Model* model, int obj_idx);
+
+    int get_first_volume_id(wxGLCanvas* canvas, int obj_idx) const;
+    int get_in_object_volume_id(wxGLCanvas* canvas, int scene_vol_idx) const;
+
+    void reload_scene(wxGLCanvas* canvas, bool force);
+
+    void load_gcode_preview(wxGLCanvas* canvas, const GCodePreviewData* preview_data, const std::vector<std::string>& str_tool_colors);
+    void load_preview(wxGLCanvas* canvas, const std::vector<std::string>& str_tool_colors);
+
+    void reset_legend_texture();
+
+    void register_on_viewport_changed_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_double_click_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_right_click_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_select_object_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_model_update_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_remove_object_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_arrange_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_rotate_object_left_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_rotate_object_right_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_scale_object_uniformly_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_increase_objects_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_decrease_objects_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_instance_moved_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_wipe_tower_moved_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_enable_action_buttons_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_gizmo_scale_uniformly_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_gizmo_rotate_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_gizmo_flatten_callback(wxGLCanvas* canvas, void* callback);
+    void register_on_update_geometry_info_callback(wxGLCanvas* canvas, void* callback);
+
+    void register_action_add_callback(wxGLCanvas* canvas, void* callback);
+    void register_action_delete_callback(wxGLCanvas* canvas, void* callback);
+    void register_action_deleteall_callback(wxGLCanvas* canvas, void* callback);
+    void register_action_arrange_callback(wxGLCanvas* canvas, void* callback);
+    void register_action_more_callback(wxGLCanvas* canvas, void* callback);
+    void register_action_fewer_callback(wxGLCanvas* canvas, void* callback);
+    void register_action_split_callback(wxGLCanvas* canvas, void* callback);
+    void register_action_cut_callback(wxGLCanvas* canvas, void* callback);
+    void register_action_settings_callback(wxGLCanvas* canvas, void* callback);
+    void register_action_layersediting_callback(wxGLCanvas* canvas, void* callback);
+    void register_action_selectbyparts_callback(wxGLCanvas* canvas, void* callback);
+
+private:
+    CanvasesMap::iterator _get_canvas(wxGLCanvas* canvas);
+    CanvasesMap::const_iterator _get_canvas(wxGLCanvas* canvas) const;
+
+    bool _init(GLCanvas3D& canvas);
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif // slic3r_GLCanvas3DManager_hpp_

src/slic3r/GUI/GLGizmo.hpp

@@ -0,0 +1,366 @@
+#ifndef slic3r_GLGizmo_hpp_
+#define slic3r_GLGizmo_hpp_
+
+#include "../../slic3r/GUI/GLTexture.hpp"
+#include "../../libslic3r/Point.hpp"
+#include "../../libslic3r/BoundingBox.hpp"
+
+#include <vector>
+
+namespace Slic3r {
+
+class BoundingBoxf3;
+class Linef3;
+class ModelObject;
+
+namespace GUI {
+
+class GLCanvas3D;
+
+class GLGizmoBase
+{
+protected:
+    struct Grabber
+    {
+        static const float SizeFactor;
+        static const float MinHalfSize;
+        static const float DraggingScaleFactor;
+
+        Vec3d center;
+        Vec3d angles;
+        float color[3];
+        bool enabled;
+        bool dragging;
+
+        Grabber();
+
+        void render(bool hover, const BoundingBoxf3& box) const;
+        void render_for_picking(const BoundingBoxf3& box) const { render(box, color, false); }
+
+    private:
+        void render(const BoundingBoxf3& box, const float* render_color, bool use_lighting) const;
+        void render_face(float half_size) const;
+    };
+
+public:
+    enum EState
+    {
+        Off,
+        Hover,
+        On,
+        Num_States
+    };
+
+protected:
+    GLCanvas3D& m_parent;
+
+    int m_group_id;
+    EState m_state;
+    // textures are assumed to be square and all with the same size in pixels, no internal check is done
+    GLTexture m_textures[Num_States];
+    int m_hover_id;
+    bool m_dragging;
+    float m_base_color[3];
+    float m_drag_color[3];
+    float m_highlight_color[3];
+    mutable std::vector<Grabber> m_grabbers;
+
+public:
+    explicit GLGizmoBase(GLCanvas3D& parent);
+    virtual ~GLGizmoBase() {}
+
+    bool init() { return on_init(); }
+
+    int get_group_id() const { return m_group_id; }
+    void set_group_id(int id) { m_group_id = id; }
+
+    EState get_state() const { return m_state; }
+    void set_state(EState state) { m_state = state; on_set_state(); }
+
+    unsigned int get_texture_id() const { return m_textures[m_state].get_id(); }
+    int get_textures_size() const { return m_textures[Off].get_width(); }
+
+    int get_hover_id() const { return m_hover_id; }
+    void set_hover_id(int id);
+    
+    void set_highlight_color(const float* color);
+
+    void enable_grabber(unsigned int id);
+    void disable_grabber(unsigned int id);
+
+    void start_dragging(const BoundingBoxf3& box);
+    void stop_dragging();
+    bool is_dragging() const { return m_dragging; }
+
+    void update(const Linef3& mouse_ray);
+
+    void render(const BoundingBoxf3& box) const { on_render(box); }
+    void render_for_picking(const BoundingBoxf3& box) const { on_render_for_picking(box); }
+
+protected:
+    virtual bool on_init() = 0;
+    virtual void on_set_state() {}
+    virtual void on_set_hover_id() {}
+    virtual void on_enable_grabber(unsigned int id) {}
+    virtual void on_disable_grabber(unsigned int id) {}
+    virtual void on_start_dragging(const BoundingBoxf3& box) {}
+    virtual void on_stop_dragging() {}
+    virtual void on_update(const Linef3& mouse_ray) = 0;
+    virtual void on_render(const BoundingBoxf3& box) const = 0;
+    virtual void on_render_for_picking(const BoundingBoxf3& box) const = 0;
+
+    float picking_color_component(unsigned int id) const;
+    void render_grabbers(const BoundingBoxf3& box) const;
+    void render_grabbers_for_picking(const BoundingBoxf3& box) const;
+
+    void set_tooltip(const std::string& tooltip) const;
+    std::string format(float value, unsigned int decimals) const;
+};
+
+class GLGizmoRotate : public GLGizmoBase
+{
+    static const float Offset;
+    static const unsigned int CircleResolution;
+    static const unsigned int AngleResolution;
+    static const unsigned int ScaleStepsCount;
+    static const float ScaleStepRad;
+    static const unsigned int ScaleLongEvery;
+    static const float ScaleLongTooth;
+    static const float ScaleShortTooth;
+    static const unsigned int SnapRegionsCount;
+    static const float GrabberOffset;
+
+public:
+    enum Axis : unsigned char
+    {
+        X,
+        Y,
+        Z
+    };
+
+private:
+    Axis m_axis;
+    double m_angle;
+
+    mutable Vec3d m_center;
+    mutable float m_radius;
+
+public:
+    GLGizmoRotate(GLCanvas3D& parent, Axis axis);
+
+    double get_angle() const { return m_angle; }
+    void set_angle(double angle);
+
+protected:
+    virtual bool on_init();
+    virtual void on_start_dragging(const BoundingBoxf3& box);
+    virtual void on_update(const Linef3& mouse_ray);
+    virtual void on_render(const BoundingBoxf3& box) const;
+    virtual void on_render_for_picking(const BoundingBoxf3& box) const;
+
+private:
+    void render_circle() const;
+    void render_scale() const;
+    void render_snap_radii() const;
+    void render_reference_radius() const;
+    void render_angle() const;
+    void render_grabber(const BoundingBoxf3& box) const;
+
+    void transform_to_local() const;
+    // returns the intersection of the mouse ray with the plane perpendicular to the gizmo axis, in local coordinate
+    Vec3d mouse_position_in_local_plane(const Linef3& mouse_ray) const;
+};
+
+class GLGizmoRotate3D : public GLGizmoBase
+{
+    std::vector<GLGizmoRotate> m_gizmos;
+
+public:
+    explicit GLGizmoRotate3D(GLCanvas3D& parent);
+
+    double get_angle_x() const { return m_gizmos[X].get_angle(); }
+    void set_angle_x(double angle) { m_gizmos[X].set_angle(angle); }
+
+    double get_angle_y() const { return m_gizmos[Y].get_angle(); }
+    void set_angle_y(double angle) { m_gizmos[Y].set_angle(angle); }
+
+    double get_angle_z() const { return m_gizmos[Z].get_angle(); }
+    void set_angle_z(double angle) { m_gizmos[Z].set_angle(angle); }
+
+protected:
+    virtual bool on_init();
+    virtual void on_set_state()
+    {
+        for (GLGizmoRotate& g : m_gizmos)
+        {
+            g.set_state(m_state);
+        }
+    }
+    virtual void on_set_hover_id()
+    {
+        for (unsigned int i = 0; i < 3; ++i)
+        {
+            m_gizmos[i].set_hover_id((m_hover_id == i) ? 0 : -1);
+        }
+    }
+    virtual void on_enable_grabber(unsigned int id)
+    {
+        if ((0 <= id) && (id < 3))
+            m_gizmos[id].enable_grabber(0);
+    }
+    virtual void on_disable_grabber(unsigned int id)
+    {
+        if ((0 <= id) && (id < 3))
+            m_gizmos[id].disable_grabber(0);
+    }
+    virtual void on_start_dragging(const BoundingBoxf3& box);
+    virtual void on_stop_dragging();
+    virtual void on_update(const Linef3& mouse_ray)
+    {
+        for (GLGizmoRotate& g : m_gizmos)
+        {
+            g.update(mouse_ray);
+        }
+    }
+    virtual void on_render(const BoundingBoxf3& box) const;
+    virtual void on_render_for_picking(const BoundingBoxf3& box) const
+    {
+        for (const GLGizmoRotate& g : m_gizmos)
+        {
+            g.render_for_picking(box);
+        }
+    }
+};
+
+class GLGizmoScale3D : public GLGizmoBase
+{
+    static const float Offset;
+    static const Vec3d OffsetVec;
+
+    mutable BoundingBoxf3 m_box;
+
+    Vec3d m_scale;
+
+    Vec3d m_starting_scale;
+    Vec3d m_starting_drag_position;
+    bool m_show_starting_box;
+    BoundingBoxf3 m_starting_box;
+
+public:
+    explicit GLGizmoScale3D(GLCanvas3D& parent);
+
+    double get_scale_x() const { return m_scale(0); }
+    void set_scale_x(double scale) { m_starting_scale(0) = scale; }
+
+    double get_scale_y() const { return m_scale(1); }
+    void set_scale_y(double scale) { m_starting_scale(1) = scale; }
+
+    double get_scale_z() const { return m_scale(2); }
+    void set_scale_z(double scale) { m_starting_scale(2) = scale; }
+
+    void set_scale(double scale) { m_starting_scale = scale * Vec3d::Ones(); }
+
+protected:
+    virtual bool on_init();
+    virtual void on_start_dragging(const BoundingBoxf3& box);
+    virtual void on_stop_dragging() { m_show_starting_box = false; }
+    virtual void on_update(const Linef3& mouse_ray);
+    virtual void on_render(const BoundingBoxf3& box) const;
+    virtual void on_render_for_picking(const BoundingBoxf3& box) const;
+
+private:
+    void render_box(const BoundingBoxf3& box) const;
+    void render_grabbers_connection(unsigned int id_1, unsigned int id_2) const;
+
+    void do_scale_x(const Linef3& mouse_ray);
+    void do_scale_y(const Linef3& mouse_ray);
+    void do_scale_z(const Linef3& mouse_ray);
+    void do_scale_uniform(const Linef3& mouse_ray);
+
+    double calc_ratio(unsigned int preferred_plane_id, const Linef3& mouse_ray, const Vec3d& center) const;
+};
+
+class GLGizmoMove3D : public GLGizmoBase
+{
+    static const double Offset;
+
+    Vec3d m_position;
+    Vec3d m_starting_drag_position;
+    Vec3d m_starting_box_center;
+    Vec3d m_starting_box_bottom_center;
+
+public:
+    explicit GLGizmoMove3D(GLCanvas3D& parent);
+
+    const Vec3d& get_position() const { return m_position; }
+    void set_position(const Vec3d& position) { m_position = position; }
+
+protected:
+    virtual bool on_init();
+    virtual void on_start_dragging(const BoundingBoxf3& box);
+    virtual void on_update(const Linef3& mouse_ray);
+    virtual void on_render(const BoundingBoxf3& box) const;
+    virtual void on_render_for_picking(const BoundingBoxf3& box) const;
+
+private:
+    double calc_projection(Axis axis, unsigned int preferred_plane_id, const Linef3& mouse_ray) const;
+};
+
+class GLGizmoFlatten : public GLGizmoBase
+{
+// This gizmo does not use grabbers. The m_hover_id relates to polygon managed by the class itself.
+
+private:
+    mutable Vec3d m_normal;
+
+    struct PlaneData {
+        std::vector<Vec3d> vertices;
+        Vec3d normal;
+        float area;
+    };
+    struct SourceDataSummary {
+        std::vector<BoundingBoxf3> bounding_boxes; // bounding boxes of convex hulls of individual volumes
+        float scaling_factor;
+        float rotation;
+        Vec3d mesh_first_point;
+    };
+
+    // This holds information to decide whether recalculation is necessary:
+    SourceDataSummary m_source_data;
+
+    std::vector<PlaneData> m_planes;
+#if ENABLE_MODELINSTANCE_3D_OFFSET
+    Pointf3s m_instances_positions;
+#else
+    std::vector<Vec2d> m_instances_positions;
+#endif // ENABLE_MODELINSTANCE_3D_OFFSET
+    Vec3d m_starting_center;
+    const ModelObject* m_model_object = nullptr;
+
+    void update_planes();
+    bool is_plane_update_necessary() const;
+
+public:
+    explicit GLGizmoFlatten(GLCanvas3D& parent);
+
+    void set_flattening_data(const ModelObject* model_object);
+    Vec3d get_flattening_normal() const;
+
+protected:
+    virtual bool on_init();
+    virtual void on_start_dragging(const BoundingBoxf3& box);
+    virtual void on_update(const Linef3& mouse_ray) {}
+    virtual void on_render(const BoundingBoxf3& box) const;
+    virtual void on_render_for_picking(const BoundingBoxf3& box) const;
+    virtual void on_set_state()
+    {
+        if (m_state == On && is_plane_update_necessary())
+            update_planes();
+    }
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif // slic3r_GLGizmo_hpp_
+

src/slic3r/GUI/GLShader.cpp

@@ -0,0 +1,256 @@
+#include <GL/glew.h>
+
+#include "GLShader.hpp"
+
+#include "../../libslic3r/Utils.hpp"
+#include <boost/nowide/fstream.hpp>
+
+#include <string>
+#include <utility>
+#include <assert.h>
+
+namespace Slic3r {
+
+GLShader::~GLShader()
+{
+    assert(fragment_program_id == 0);
+    assert(vertex_program_id == 0);
+    assert(shader_program_id == 0);
+}
+
+// A safe wrapper around glGetString to report a "N/A" string in case glGetString returns nullptr.
+inline std::string gl_get_string_safe(GLenum param)
+{
+    const char *value = (const char*)glGetString(param);
+    return std::string(value ? value : "N/A");
+}
+
+bool GLShader::load_from_text(const char *fragment_shader, const char *vertex_shader)
+{
+    std::string gl_version = gl_get_string_safe(GL_VERSION);
+    int major = atoi(gl_version.c_str());
+    //int minor = atoi(gl_version.c_str() + gl_version.find('.') + 1);
+    if (major < 2) {
+        // Cannot create a shader object on OpenGL 1.x.
+        // Form an error message.
+        std::string gl_vendor    = gl_get_string_safe(GL_VENDOR);
+        std::string gl_renderer  = gl_get_string_safe(GL_RENDERER);
+        std::string glsl_version = gl_get_string_safe(GL_SHADING_LANGUAGE_VERSION);
+        last_error = "Your computer does not support OpenGL shaders.\n";
+#ifdef _WIN32
+        if (gl_vendor == "Microsoft Corporation" && gl_renderer == "GDI Generic") {
+            last_error = "Windows is using a software OpenGL renderer.\n"
+                         "You are either connected over remote desktop,\n"
+                         "or a hardware acceleration is not available.\n";
+        }
+#endif
+        last_error += "GL version:   " + gl_version   + "\n";
+        last_error += "vendor:       " + gl_vendor    + "\n";
+        last_error += "renderer:     " + gl_renderer  + "\n";
+        last_error += "GLSL version: " + glsl_version + "\n";
+        return false;
+    }
+
+    if (fragment_shader != nullptr) {
+        this->fragment_program_id = glCreateShader(GL_FRAGMENT_SHADER);
+        if (this->fragment_program_id == 0) {
+            last_error = "glCreateShader(GL_FRAGMENT_SHADER) failed.";
+            return false;
+        }
+        GLint len = (GLint)strlen(fragment_shader);
+        glShaderSource(this->fragment_program_id, 1, &fragment_shader, &len);
+        glCompileShader(this->fragment_program_id);
+        GLint params;
+        glGetShaderiv(this->fragment_program_id, GL_COMPILE_STATUS, &params);
+        if (params == GL_FALSE) {
+            // Compilation failed. Get the log.
+            glGetShaderiv(this->fragment_program_id, GL_INFO_LOG_LENGTH, &params);
+            std::vector<char> msg(params);
+            glGetShaderInfoLog(this->fragment_program_id, params, &params, msg.data());
+            this->last_error = std::string("Fragment shader compilation failed:\n") + msg.data();
+            this->release();
+            return false;
+        }
+    }
+
+    if (vertex_shader != nullptr) {
+        this->vertex_program_id = glCreateShader(GL_VERTEX_SHADER);
+        if (this->vertex_program_id == 0) {
+            last_error = "glCreateShader(GL_VERTEX_SHADER) failed.";
+            this->release();
+            return false;
+        }
+        GLint len = (GLint)strlen(vertex_shader);
+        glShaderSource(this->vertex_program_id, 1, &vertex_shader, &len);
+        glCompileShader(this->vertex_program_id);
+        GLint params;
+        glGetShaderiv(this->vertex_program_id, GL_COMPILE_STATUS, &params);
+        if (params == GL_FALSE) {
+            // Compilation failed. Get the log.
+            glGetShaderiv(this->vertex_program_id, GL_INFO_LOG_LENGTH, &params);
+            std::vector<char> msg(params);
+            glGetShaderInfoLog(this->vertex_program_id, params, &params, msg.data());
+            this->last_error = std::string("Vertex shader compilation failed:\n") + msg.data();
+            this->release();
+            return false;
+        }
+    }
+
+    // Link shaders
+    this->shader_program_id = glCreateProgram();
+    if (this->shader_program_id == 0) {
+        last_error = "glCreateProgram() failed.";
+        this->release();
+        return false;
+    }
+
+    if (this->fragment_program_id)
+        glAttachShader(this->shader_program_id, this->fragment_program_id);
+    if (this->vertex_program_id)
+        glAttachShader(this->shader_program_id, this->vertex_program_id);
+    glLinkProgram(this->shader_program_id);
+
+    GLint params;
+    glGetProgramiv(this->shader_program_id, GL_LINK_STATUS, &params);
+    if (params == GL_FALSE) {
+        // Linking failed. Get the log.
+        glGetProgramiv(this->vertex_program_id, GL_INFO_LOG_LENGTH, &params);
+        std::vector<char> msg(params);
+        glGetProgramInfoLog(this->vertex_program_id, params, &params, msg.data());
+        this->last_error = std::string("Shader linking failed:\n") + msg.data();
+        this->release();
+        return false;
+    }
+
+    last_error.clear();
+    return true;
+}
+
+bool GLShader::load_from_file(const char* fragment_shader_filename, const char* vertex_shader_filename)
+{
+    const std::string& path = resources_dir() + "/shaders/";
+
+    boost::nowide::ifstream vs(path + std::string(vertex_shader_filename), boost::nowide::ifstream::binary);
+    if (!vs.good())
+        return false;
+
+    vs.seekg(0, vs.end);
+    int file_length = vs.tellg();
+    vs.seekg(0, vs.beg);
+    std::string vertex_shader(file_length, '\0');
+    vs.read(const_cast<char*>(vertex_shader.data()), file_length);
+    if (!vs.good())
+        return false;
+
+    vs.close();
+
+    boost::nowide::ifstream fs(path + std::string(fragment_shader_filename), boost::nowide::ifstream::binary);
+    if (!fs.good())
+        return false;
+
+    fs.seekg(0, fs.end);
+    file_length = fs.tellg();
+    fs.seekg(0, fs.beg);
+    std::string fragment_shader(file_length, '\0');
+    fs.read(const_cast<char*>(fragment_shader.data()), file_length);
+    if (!fs.good())
+        return false;
+
+    fs.close();
+
+    return load_from_text(fragment_shader.c_str(), vertex_shader.c_str());
+}
+
+void GLShader::release()
+{
+    if (this->shader_program_id) {
+        if (this->vertex_program_id)
+            glDetachShader(this->shader_program_id, this->vertex_program_id);
+        if (this->fragment_program_id)
+            glDetachShader(this->shader_program_id, this->fragment_program_id);
+        glDeleteProgram(this->shader_program_id);
+        this->shader_program_id = 0;
+    }
+
+    if (this->vertex_program_id) {
+        glDeleteShader(this->vertex_program_id);
+        this->vertex_program_id = 0;
+    }
+    if (this->fragment_program_id) {
+        glDeleteShader(this->fragment_program_id);
+        this->fragment_program_id = 0;
+    }
+}
+
+void GLShader::enable() const
+{
+    glUseProgram(this->shader_program_id);
+}
+
+void GLShader::disable() const
+{
+    glUseProgram(0);
+}
+
+// Return shader vertex attribute ID
+int GLShader::get_attrib_location(const char *name) const
+{
+    return this->shader_program_id ? glGetAttribLocation(this->shader_program_id, name) : -1;
+}
+
+// Return shader uniform variable ID
+int GLShader::get_uniform_location(const char *name) const
+{
+    return this->shader_program_id ? glGetUniformLocation(this->shader_program_id, name) : -1;
+}
+
+bool GLShader::set_uniform(const char *name, float value) const
+{
+    int id = this->get_uniform_location(name);
+    if (id >= 0) { 
+        glUniform1fARB(id, value);
+        return true;
+    }
+    return false;
+}
+
+bool GLShader::set_uniform(const char* name, const float* matrix) const
+{
+    int id = get_uniform_location(name);
+    if (id >= 0)
+    {
+        ::glUniformMatrix4fv(id, 1, GL_FALSE, (const GLfloat*)matrix);
+        return true;
+    }
+    return false;
+}
+
+/*
+# Set shader vector
+sub SetVector
+{
+    my($self,$var,@values) = @_;
+
+    my $id = $self->Map($var);
+    return 'Unable to map $var' if (!defined($id));
+
+    my $count = scalar(@values);
+    eval('glUniform'.$count.'fARB($id,@values)');
+
+    return '';
+}
+
+# Set shader 4x4 matrix
+sub SetMatrix
+{
+    my($self,$var,$oga) = @_;
+
+    my $id = $self->Map($var);
+    return 'Unable to map $var' if (!defined($id));
+
+    glUniformMatrix4fvARB_c($id,1,0,$oga->ptr());
+    return '';
+}
+*/
+
+} // namespace Slic3r

src/slic3r/GUI/GLShader.hpp

@@ -0,0 +1,41 @@
+#ifndef slic3r_GLShader_hpp_
+#define slic3r_GLShader_hpp_
+
+#include "../../libslic3r/libslic3r.h"
+#include "../../libslic3r/Point.hpp"
+
+namespace Slic3r {
+
+class GLShader
+{
+public:
+    GLShader() :
+        fragment_program_id(0),
+        vertex_program_id(0),
+        shader_program_id(0)
+        {}
+    ~GLShader();
+
+    bool load_from_text(const char *fragment_shader, const char *vertex_shader);
+    bool load_from_file(const char* fragment_shader_filename, const char* vertex_shader_filename);
+
+    void release();
+
+    int  get_attrib_location(const char *name) const;
+    int  get_uniform_location(const char *name) const;
+
+    bool set_uniform(const char *name, float value) const;
+    bool set_uniform(const char* name, const float* matrix) const;
+
+    void enable() const;
+    void disable() const;
+
+    unsigned int    fragment_program_id;
+    unsigned int    vertex_program_id;
+    unsigned int    shader_program_id;
+    std::string     last_error;
+};
+
+}
+
+#endif /* slic3r_GLShader_hpp_ */

src/slic3r/GUI/GLTexture.cpp

@@ -0,0 +1,199 @@
+#include "GLTexture.hpp"
+
+#include <GL/glew.h>
+
+#include <wx/image.h>
+
+#include <boost/filesystem.hpp>
+
+#include <vector>
+#include <algorithm>
+
+namespace Slic3r {
+namespace GUI {
+
+GLTexture::Quad_UVs GLTexture::FullTextureUVs = { { 0.0f, 1.0f }, { 1.0f, 1.0f }, { 1.0f, 0.0f }, { 0.0f, 0.0f } };
+
+GLTexture::GLTexture()
+    : m_id(0)
+    , m_width(0)
+    , m_height(0)
+    , m_source("")
+{
+}
+
+GLTexture::~GLTexture()
+{
+    reset();
+}
+
+bool GLTexture::load_from_file(const std::string& filename, bool generate_mipmaps)
+{
+    reset();
+
+    if (!boost::filesystem::exists(filename))
+        return false;
+
+    // Load a PNG with an alpha channel.
+    wxImage image;
+    if (!image.LoadFile(filename, wxBITMAP_TYPE_PNG))
+    {
+        reset();
+        return false;
+    }
+
+    m_width = image.GetWidth();
+    m_height = image.GetHeight();
+    int n_pixels = m_width * m_height;
+
+    if (n_pixels <= 0)
+    {
+        reset();
+        return false;
+    }
+
+    // Get RGB & alpha raw data from wxImage, pack them into an array.
+    unsigned char* img_rgb = image.GetData();
+    if (img_rgb == nullptr)
+    {
+        reset();
+        return false;
+    }
+
+    unsigned char* img_alpha = image.GetAlpha();
+
+    std::vector<unsigned char> data(n_pixels * 4, 0);
+    for (int i = 0; i < n_pixels; ++i)
+    {
+        int data_id = i * 4;
+        int img_id = i * 3;
+        data[data_id + 0] = img_rgb[img_id + 0];
+        data[data_id + 1] = img_rgb[img_id + 1];
+        data[data_id + 2] = img_rgb[img_id + 2];
+        data[data_id + 3] = (img_alpha != nullptr) ? img_alpha[i] : 255;
+    }
+
+    // sends data to gpu
+    ::glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    ::glGenTextures(1, &m_id);
+    ::glBindTexture(GL_TEXTURE_2D, m_id);
+    ::glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)m_width, (GLsizei)m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, (const void*)data.data());
+    if (generate_mipmaps)
+    {
+        // we manually generate mipmaps because glGenerateMipmap() function is not reliable on all graphics cards
+        unsigned int levels_count = _generate_mipmaps(image);
+        ::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1 + levels_count);
+        ::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+    }
+    else
+    {
+        ::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        ::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1);
+    }
+    ::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    ::glBindTexture(GL_TEXTURE_2D, 0);
+
+    m_source = filename;
+    return true;
+}
+
+void GLTexture::reset()
+{
+    if (m_id != 0)
+        ::glDeleteTextures(1, &m_id);
+
+    m_id = 0;
+    m_width = 0;
+    m_height = 0;
+    m_source = "";
+}
+
+unsigned int GLTexture::get_id() const
+{
+    return m_id;
+}
+
+int GLTexture::get_width() const
+{
+    return m_width;
+}
+
+int GLTexture::get_height() const
+{
+    return m_height;
+}
+
+const std::string& GLTexture::get_source() const
+{
+    return m_source;
+}
+
+void GLTexture::render_texture(unsigned int tex_id, float left, float right, float bottom, float top)
+{
+    render_sub_texture(tex_id, left, right, bottom, top, FullTextureUVs);
+}
+
+void GLTexture::render_sub_texture(unsigned int tex_id, float left, float right, float bottom, float top, const GLTexture::Quad_UVs& uvs)
+{
+    ::glEnable(GL_BLEND);
+    ::glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+    ::glEnable(GL_TEXTURE_2D);
+    ::glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+
+    ::glBindTexture(GL_TEXTURE_2D, (GLuint)tex_id);
+
+    ::glBegin(GL_QUADS);
+    ::glTexCoord2f(uvs.left_bottom.u, uvs.left_bottom.v); ::glVertex2f(left, bottom);
+    ::glTexCoord2f(uvs.right_bottom.u, uvs.right_bottom.v); ::glVertex2f(right, bottom);
+    ::glTexCoord2f(uvs.right_top.u, uvs.right_top.v); ::glVertex2f(right, top);
+    ::glTexCoord2f(uvs.left_top.u, uvs.left_top.v); ::glVertex2f(left, top);
+    ::glEnd();
+
+    ::glBindTexture(GL_TEXTURE_2D, 0);
+
+    ::glDisable(GL_TEXTURE_2D);
+    ::glDisable(GL_BLEND);
+}
+
+unsigned int GLTexture::_generate_mipmaps(wxImage& image)
+{
+    int w = image.GetWidth();
+    int h = image.GetHeight();
+    GLint level = 0;
+    std::vector<unsigned char> data(w * h * 4, 0);
+
+    while ((w > 1) || (h > 1))
+    {
+        ++level;
+
+        w = std::max(w / 2, 1);
+        h = std::max(h / 2, 1);
+
+        int n_pixels = w * h;
+
+        image = image.ResampleBicubic(w, h);
+
+        unsigned char* img_rgb = image.GetData();
+        unsigned char* img_alpha = image.GetAlpha();
+
+        data.resize(n_pixels * 4);
+        for (int i = 0; i < n_pixels; ++i)
+        {
+            int data_id = i * 4;
+            int img_id = i * 3;
+            data[data_id + 0] = img_rgb[img_id + 0];
+            data[data_id + 1] = img_rgb[img_id + 1];
+            data[data_id + 2] = img_rgb[img_id + 2];
+            data[data_id + 3] = (img_alpha != nullptr) ? img_alpha[i] : 255;
+        }
+
+        ::glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, (GLsizei)w, (GLsizei)h, 0, GL_RGBA, GL_UNSIGNED_BYTE, (const void*)data.data());
+    }
+
+    return (unsigned int)level;
+}
+
+} // namespace GUI
+} // namespace Slic3r

src/slic3r/GUI/GLTexture.hpp

@@ -0,0 +1,60 @@
+#ifndef slic3r_GLTexture_hpp_
+#define slic3r_GLTexture_hpp_
+
+#include <string>
+
+class wxImage;
+
+namespace Slic3r {
+namespace GUI {
+
+    class GLTexture
+    {
+    public:
+        struct UV
+        {
+            float u;
+            float v;
+        };
+
+        struct Quad_UVs
+        {
+            UV left_bottom;
+            UV right_bottom;
+            UV right_top;
+            UV left_top;
+        };
+
+        static Quad_UVs FullTextureUVs;
+
+    protected:
+        unsigned int m_id;
+        int m_width;
+        int m_height;
+        std::string m_source;
+
+    public:
+        GLTexture();
+        virtual ~GLTexture();
+
+        bool load_from_file(const std::string& filename, bool generate_mipmaps);
+        void reset();
+
+        unsigned int get_id() const;
+        int get_width() const;
+        int get_height() const;
+
+        const std::string& get_source() const;
+
+        static void render_texture(unsigned int tex_id, float left, float right, float bottom, float top);
+        static void render_sub_texture(unsigned int tex_id, float left, float right, float bottom, float top, const Quad_UVs& uvs);
+
+    protected:
+        unsigned int _generate_mipmaps(wxImage& image);
+    };
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif // slic3r_GLTexture_hpp_
+

src/slic3r/GUI/GLToolbar.cpp

@@ -0,0 +1,722 @@
+#include "../../libslic3r/Point.hpp"
+#include "GLToolbar.hpp"
+
+#include "../../libslic3r/libslic3r.h"
+#include "../../slic3r/GUI/GLCanvas3D.hpp"
+
+#include <GL/glew.h>
+
+#include <wx/bitmap.h>
+#include <wx/dcmemory.h>
+#include <wx/settings.h>
+
+namespace Slic3r {
+namespace GUI {
+
+GLToolbarItem::Data::Data()
+    : name("")
+    , tooltip("")
+    , sprite_id(-1)
+    , is_toggable(false)
+    , action_callback(nullptr)
+{
+}
+
+GLToolbarItem::GLToolbarItem(GLToolbarItem::EType type, const GLToolbarItem::Data& data)
+    : m_type(type)
+    , m_state(Disabled)
+    , m_data(data)
+{
+}
+
+GLToolbarItem::EState GLToolbarItem::get_state() const
+{
+    return m_state;
+}
+
+void GLToolbarItem::set_state(GLToolbarItem::EState state)
+{
+    m_state = state;
+}
+
+const std::string& GLToolbarItem::get_name() const
+{
+    return m_data.name;
+}
+
+const std::string& GLToolbarItem::get_tooltip() const
+{
+    return m_data.tooltip;
+}
+
+void GLToolbarItem::do_action()
+{
+    if (m_data.action_callback != nullptr)
+        m_data.action_callback->call();
+}
+
+bool GLToolbarItem::is_enabled() const
+{
+    return m_state != Disabled;
+}
+
+bool GLToolbarItem::is_hovered() const
+{
+    return (m_state == Hover) || (m_state == HoverPressed);
+}
+
+bool GLToolbarItem::is_pressed() const
+{
+    return (m_state == Pressed) || (m_state == HoverPressed);
+}
+
+bool GLToolbarItem::is_toggable() const
+{
+    return m_data.is_toggable;
+}
+
+bool GLToolbarItem::is_separator() const
+{
+    return m_type == Separator;
+}
+
+void GLToolbarItem::render(unsigned int tex_id, float left, float right, float bottom, float top, unsigned int texture_size, unsigned int border_size, unsigned int icon_size, unsigned int gap_size) const
+{
+    GLTexture::render_sub_texture(tex_id, left, right, bottom, top, get_uvs(texture_size, border_size, icon_size, gap_size));
+}
+
+GLTexture::Quad_UVs GLToolbarItem::get_uvs(unsigned int texture_size, unsigned int border_size, unsigned int icon_size, unsigned int gap_size) const
+{
+    GLTexture::Quad_UVs uvs;
+
+    float inv_texture_size = (texture_size != 0) ? 1.0f / (float)texture_size : 0.0f;
+
+    float scaled_icon_size = (float)icon_size * inv_texture_size;
+    float scaled_border_size = (float)border_size * inv_texture_size;
+    float scaled_gap_size = (float)gap_size * inv_texture_size;
+    float stride = scaled_icon_size + scaled_gap_size;
+
+    float left = scaled_border_size + (float)m_state * stride;
+    float right = left + scaled_icon_size;
+    float top = scaled_border_size + (float)m_data.sprite_id * stride;
+    float bottom = top + scaled_icon_size;
+
+    uvs.left_top = { left, top };
+    uvs.left_bottom = { left, bottom };
+    uvs.right_bottom = { right, bottom };
+    uvs.right_top = { right, top };
+    
+    return uvs;
+}
+
+GLToolbar::ItemsIconsTexture::ItemsIconsTexture()
+    : items_icon_size(0)
+    , items_icon_border_size(0)
+    , items_icon_gap_size(0)
+{
+}
+
+GLToolbar::Layout::Layout()
+    : type(Horizontal)
+    , top(0.0f)
+    , left(0.0f)
+    , separator_size(0.0f)
+    , gap_size(0.0f)
+{
+}
+
+GLToolbar::GLToolbar(GLCanvas3D& parent)
+    : m_parent(parent)
+    , m_enabled(false)
+{
+}
+
+bool GLToolbar::init(const std::string& icons_texture_filename, unsigned int items_icon_size, unsigned int items_icon_border_size, unsigned int items_icon_gap_size)
+{
+    std::string path = resources_dir() + "/icons/";
+    bool res = !icons_texture_filename.empty() && m_icons_texture.texture.load_from_file(path + icons_texture_filename, false);
+    if (res)
+    {
+        m_icons_texture.items_icon_size = items_icon_size;
+        m_icons_texture.items_icon_border_size = items_icon_border_size;
+        m_icons_texture.items_icon_gap_size = items_icon_gap_size;
+    }
+
+    return res;
+}
+
+GLToolbar::Layout::Type GLToolbar::get_layout_type() const
+{
+    return m_layout.type;
+}
+
+void GLToolbar::set_layout_type(GLToolbar::Layout::Type type)
+{
+    m_layout.type = type;
+}
+
+void GLToolbar::set_position(float top, float left)
+{
+    m_layout.top = top;
+    m_layout.left = left;
+}
+
+void GLToolbar::set_separator_size(float size)
+{
+    m_layout.separator_size = size;
+}
+
+void GLToolbar::set_gap_size(float size)
+{
+    m_layout.gap_size = size;
+}
+
+bool GLToolbar::is_enabled() const
+{
+    return m_enabled;
+}
+
+void GLToolbar::set_enabled(bool enable)
+{
+    m_enabled = true;
+}
+
+bool GLToolbar::add_item(const GLToolbarItem::Data& data)
+{
+    GLToolbarItem* item = new GLToolbarItem(GLToolbarItem::Action, data);
+    if (item == nullptr)
+        return false;
+
+    m_items.push_back(item);
+    return true;
+}
+
+bool GLToolbar::add_separator()
+{
+    GLToolbarItem::Data data;
+    GLToolbarItem* item = new GLToolbarItem(GLToolbarItem::Separator, data);
+    if (item == nullptr)
+        return false;
+
+    m_items.push_back(item);
+    return true;
+}
+
+float GLToolbar::get_width() const
+{
+    switch (m_layout.type)
+    {
+    default:
+    case Layout::Horizontal:
+    {
+        return get_width_horizontal();
+    }
+    case Layout::Vertical:
+    {
+        return get_width_vertical();
+    }
+    }
+}
+
+float GLToolbar::get_height() const
+{
+    switch (m_layout.type)
+    {
+    default:
+    case Layout::Horizontal:
+    {
+        return get_height_horizontal();
+    }
+    case Layout::Vertical:
+    {
+        return get_height_vertical();
+    }
+    }
+}
+
+void GLToolbar::enable_item(const std::string& name)
+{
+    for (GLToolbarItem* item : m_items)
+    {
+        if ((item->get_name() == name) && (item->get_state() == GLToolbarItem::Disabled))
+        {
+            item->set_state(GLToolbarItem::Normal);
+            return;
+        }
+    }
+}
+
+void GLToolbar::disable_item(const std::string& name)
+{
+    for (GLToolbarItem* item : m_items)
+    {
+        if (item->get_name() == name)
+        {
+            item->set_state(GLToolbarItem::Disabled);
+            return;
+        }
+    }
+}
+
+bool GLToolbar::is_item_pressed(const std::string& name) const
+{
+    for (GLToolbarItem* item : m_items)
+    {
+        if (item->get_name() == name)
+            return item->is_pressed();
+    }
+
+    return false;
+}
+
+void GLToolbar::update_hover_state(const Vec2d& mouse_pos)
+{
+    if (!m_enabled)
+        return;
+
+    switch (m_layout.type)
+    {
+    default:
+    case Layout::Horizontal:
+    {
+        update_hover_state_horizontal(mouse_pos);
+        break;
+    }
+    case Layout::Vertical:
+    {
+        update_hover_state_vertical(mouse_pos);
+        break;
+    }
+    }
+}
+
+int GLToolbar::contains_mouse(const Vec2d& mouse_pos) const
+{
+    if (!m_enabled)
+        return -1;
+
+    switch (m_layout.type)
+    {
+    default:
+    case Layout::Horizontal:
+    {
+        return contains_mouse_horizontal(mouse_pos);
+    }
+    case Layout::Vertical:
+    {
+        return contains_mouse_vertical(mouse_pos);
+    }
+    }
+}
+
+void GLToolbar::do_action(unsigned int item_id)
+{
+    if (item_id < (unsigned int)m_items.size())
+    {
+        GLToolbarItem* item = m_items[item_id];
+        if ((item != nullptr) && !item->is_separator() && item->is_hovered())
+        {
+            if (item->is_toggable())
+            {
+                GLToolbarItem::EState state = item->get_state();
+                if (state == GLToolbarItem::Hover)
+                    item->set_state(GLToolbarItem::HoverPressed);
+                else if (state == GLToolbarItem::HoverPressed)
+                    item->set_state(GLToolbarItem::Hover);
+
+                m_parent.render();
+                item->do_action();
+            }
+            else
+            {
+                item->set_state(GLToolbarItem::HoverPressed);
+                m_parent.render();
+                item->do_action();
+                if (item->get_state() != GLToolbarItem::Disabled)
+                {
+                    // the item may get disabled during the action, if not, set it back to hover state
+                    item->set_state(GLToolbarItem::Hover);
+                    m_parent.render();
+                }
+            }
+        }
+    }
+}
+
+void GLToolbar::render() const
+{
+    if (!m_enabled || m_items.empty())
+        return;
+
+    ::glDisable(GL_DEPTH_TEST);
+
+    ::glPushMatrix();
+    ::glLoadIdentity();
+
+    switch (m_layout.type)
+    {
+    default:
+    case Layout::Horizontal:
+    {
+        render_horizontal();
+        break;
+    }
+    case Layout::Vertical:
+    {
+        render_vertical();
+        break;
+    }
+    }
+
+    ::glPopMatrix();
+}
+
+float GLToolbar::get_width_horizontal() const
+{
+    return get_main_size();
+}
+
+float GLToolbar::get_width_vertical() const
+{
+    return m_icons_texture.items_icon_size;
+}
+
+float GLToolbar::get_height_horizontal() const
+{
+    return m_icons_texture.items_icon_size;
+}
+
+float GLToolbar::get_height_vertical() const
+{
+    return get_main_size();
+}
+
+float GLToolbar::get_main_size() const
+{
+    float size = 0.0f;
+    for (unsigned int i = 0; i < (unsigned int)m_items.size(); ++i)
+    {
+        if (m_items[i]->is_separator())
+            size += m_layout.separator_size;
+        else
+            size += (float)m_icons_texture.items_icon_size;
+    }
+
+    if (m_items.size() > 1)
+        size += ((float)m_items.size() - 1.0f) * m_layout.gap_size;
+
+    return size;
+}
+
+void GLToolbar::update_hover_state_horizontal(const Vec2d& mouse_pos)
+{
+    float zoom = m_parent.get_camera_zoom();
+    float inv_zoom = (zoom != 0.0f) ? 1.0f / zoom : 0.0f;
+
+    Size cnv_size = m_parent.get_canvas_size();
+    Vec2d scaled_mouse_pos((mouse_pos(0) - 0.5 * (double)cnv_size.get_width()) * inv_zoom, (0.5 * (double)cnv_size.get_height() - mouse_pos(1)) * inv_zoom);
+
+    float scaled_icons_size = (float)m_icons_texture.items_icon_size * inv_zoom;
+    float scaled_separator_size = m_layout.separator_size * inv_zoom;
+    float scaled_gap_size = m_layout.gap_size * inv_zoom;
+
+    float separator_stride = scaled_separator_size + scaled_gap_size;
+    float icon_stride = scaled_icons_size + scaled_gap_size;
+
+    float left = m_layout.left;
+    float top = m_layout.top;
+
+    std::string tooltip = "";
+        
+    for (GLToolbarItem* item : m_items)
+    {
+        if (item->is_separator())
+            left += separator_stride;
+        else
+        {
+            float right = left + scaled_icons_size;
+            float bottom = top - scaled_icons_size;
+
+            GLToolbarItem::EState state = item->get_state();
+            bool inside = (left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top);
+
+            switch (state)
+            {
+            case GLToolbarItem::Normal:
+            {
+                if (inside)
+                    item->set_state(GLToolbarItem::Hover);
+
+                break;
+            }
+            case GLToolbarItem::Hover:
+            {
+                if (inside)
+                    tooltip = item->get_tooltip();
+                else
+                    item->set_state(GLToolbarItem::Normal);
+                
+                break;
+            }
+            case GLToolbarItem::Pressed:
+            {
+                if (inside)
+                    item->set_state(GLToolbarItem::HoverPressed);
+                
+                break;
+            }
+            case GLToolbarItem::HoverPressed:
+            {
+                if (inside)
+                    tooltip = item->get_tooltip();
+                else
+                    item->set_state(GLToolbarItem::Pressed);
+                
+                break;
+            }
+            default:
+            case GLToolbarItem::Disabled:
+            {
+                break;
+            }
+            }
+
+            left += icon_stride;
+        }
+    }
+
+    m_parent.set_tooltip(tooltip);
+}
+
+void GLToolbar::update_hover_state_vertical(const Vec2d& mouse_pos)
+{
+    float zoom = m_parent.get_camera_zoom();
+    float inv_zoom = (zoom != 0.0f) ? 1.0f / zoom : 0.0f;
+
+    Size cnv_size = m_parent.get_canvas_size();
+    Vec2d scaled_mouse_pos((mouse_pos(0) - 0.5 * (double)cnv_size.get_width()) * inv_zoom, (0.5 * (double)cnv_size.get_height() - mouse_pos(1)) * inv_zoom);
+
+    float scaled_icons_size = (float)m_icons_texture.items_icon_size * inv_zoom;
+    float scaled_separator_size = m_layout.separator_size * inv_zoom;
+    float scaled_gap_size = m_layout.gap_size * inv_zoom;
+
+    float separator_stride = scaled_separator_size + scaled_gap_size;
+    float icon_stride = scaled_icons_size + scaled_gap_size;
+
+    float left = m_layout.left;
+    float top = m_layout.top;
+
+    std::string tooltip = "";
+
+    for (GLToolbarItem* item : m_items)
+    {
+        if (item->is_separator())
+            top -= separator_stride;
+        else
+        {
+            float right = left + scaled_icons_size;
+            float bottom = top - scaled_icons_size;
+
+            GLToolbarItem::EState state = item->get_state();
+            bool inside = (left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top);
+
+            switch (state)
+            {
+            case GLToolbarItem::Normal:
+            {
+                if (inside)
+                    item->set_state(GLToolbarItem::Hover);
+
+                break;
+            }
+            case GLToolbarItem::Hover:
+            {
+                if (inside)
+                    tooltip = item->get_tooltip();
+                else
+                    item->set_state(GLToolbarItem::Normal);
+
+                break;
+            }
+            case GLToolbarItem::Pressed:
+            {
+                if (inside)
+                    item->set_state(GLToolbarItem::HoverPressed);
+
+                break;
+            }
+            case GLToolbarItem::HoverPressed:
+            {
+                if (inside)
+                    tooltip = item->get_tooltip();
+                else
+                    item->set_state(GLToolbarItem::Pressed);
+
+                break;
+            }
+            default:
+            case GLToolbarItem::Disabled:
+            {
+                break;
+            }
+            }
+
+            top -= icon_stride;
+        }
+    }
+
+    m_parent.set_tooltip(tooltip);
+}
+
+int GLToolbar::contains_mouse_horizontal(const Vec2d& mouse_pos) const
+{
+    float zoom = m_parent.get_camera_zoom();
+    float inv_zoom = (zoom != 0.0f) ? 1.0f / zoom : 0.0f;
+
+    Size cnv_size = m_parent.get_canvas_size();
+    Vec2d scaled_mouse_pos((mouse_pos(0) - 0.5 * (double)cnv_size.get_width()) * inv_zoom, (0.5 * (double)cnv_size.get_height() - mouse_pos(1)) * inv_zoom);
+
+    float scaled_icons_size = (float)m_icons_texture.items_icon_size * inv_zoom;
+    float scaled_separator_size = m_layout.separator_size * inv_zoom;
+    float scaled_gap_size = m_layout.gap_size * inv_zoom;
+
+    float separator_stride = scaled_separator_size + scaled_gap_size;
+    float icon_stride = scaled_icons_size + scaled_gap_size;
+
+    float left = m_layout.left;
+    float top = m_layout.top;
+
+    int id = -1;
+    
+    for (GLToolbarItem* item : m_items)
+    {
+        ++id;
+        
+        if (item->is_separator())
+            left += separator_stride;
+        else
+        {
+            float right = left + scaled_icons_size;
+            float bottom = top - scaled_icons_size;
+            
+            if ((left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top))
+                return id;
+            
+            left += icon_stride;
+        }
+    }
+    
+    return -1;
+}
+
+int GLToolbar::contains_mouse_vertical(const Vec2d& mouse_pos) const
+{
+    float zoom = m_parent.get_camera_zoom();
+    float inv_zoom = (zoom != 0.0f) ? 1.0f / zoom : 0.0f;
+
+    Size cnv_size = m_parent.get_canvas_size();
+    Vec2d scaled_mouse_pos((mouse_pos(0) - 0.5 * (double)cnv_size.get_width()) * inv_zoom, (0.5 * (double)cnv_size.get_height() - mouse_pos(1)) * inv_zoom);
+
+    float scaled_icons_size = (float)m_icons_texture.items_icon_size * inv_zoom;
+    float scaled_separator_size = m_layout.separator_size * inv_zoom;
+    float scaled_gap_size = m_layout.gap_size * inv_zoom;
+
+    float separator_stride = scaled_separator_size + scaled_gap_size;
+    float icon_stride = scaled_icons_size + scaled_gap_size;
+
+    float left = m_layout.left;
+    float top = m_layout.top;
+
+    int id = -1;
+
+    for (GLToolbarItem* item : m_items)
+    {
+        ++id;
+
+        if (item->is_separator())
+            top -= separator_stride;
+        else
+        {
+            float right = left + scaled_icons_size;
+            float bottom = top - scaled_icons_size;
+
+            if ((left <= (float)scaled_mouse_pos(0)) && ((float)scaled_mouse_pos(0) <= right) && (bottom <= (float)scaled_mouse_pos(1)) && ((float)scaled_mouse_pos(1) <= top))
+                return id;
+
+            top -= icon_stride;
+        }
+    }
+
+    return -1;
+}
+
+void GLToolbar::render_horizontal() const
+{
+    unsigned int tex_id = m_icons_texture.texture.get_id();
+    int tex_size = m_icons_texture.texture.get_width();
+
+    if ((tex_id == 0) || (tex_size <= 0))
+        return;
+
+    float zoom = m_parent.get_camera_zoom();
+    float inv_zoom = (zoom != 0.0f) ? 1.0f / zoom : 0.0f;
+
+    float scaled_icons_size = (float)m_icons_texture.items_icon_size * inv_zoom;
+    float scaled_separator_size = m_layout.separator_size * inv_zoom;
+    float scaled_gap_size = m_layout.gap_size * inv_zoom;
+
+    float separator_stride = scaled_separator_size + scaled_gap_size;
+    float icon_stride = scaled_icons_size + scaled_gap_size;
+
+    float left = m_layout.left;
+    float top = m_layout.top;
+
+    // renders icons
+    for (const GLToolbarItem* item : m_items)
+    {
+        if (item->is_separator())
+            left += separator_stride;
+        else
+        {
+            item->render(tex_id, left, left + scaled_icons_size, top - scaled_icons_size, top, (unsigned int)tex_size, m_icons_texture.items_icon_border_size, m_icons_texture.items_icon_size, m_icons_texture.items_icon_gap_size);
+            left += icon_stride;
+        }
+    }
+}
+
+void GLToolbar::render_vertical() const
+{
+    unsigned int tex_id = m_icons_texture.texture.get_id();
+    int tex_size = m_icons_texture.texture.get_width();
+
+    if ((tex_id == 0) || (tex_size <= 0))
+        return;
+
+    float zoom = m_parent.get_camera_zoom();
+    float inv_zoom = (zoom != 0.0f) ? 1.0f / zoom : 0.0f;
+
+    float scaled_icons_size = (float)m_icons_texture.items_icon_size * inv_zoom;
+    float scaled_separator_size = m_layout.separator_size * inv_zoom;
+    float scaled_gap_size = m_layout.gap_size * inv_zoom;
+
+    float separator_stride = scaled_separator_size + scaled_gap_size;
+    float icon_stride = scaled_icons_size + scaled_gap_size;
+
+    float left = m_layout.left;
+    float top = m_layout.top;
+
+    // renders icons
+    for (const GLToolbarItem* item : m_items)
+    {
+        if (item->is_separator())
+            top -= separator_stride;
+        else
+        {
+            item->render(tex_id, left, left + scaled_icons_size, top - scaled_icons_size, top, (unsigned int)tex_size, m_icons_texture.items_icon_border_size, m_icons_texture.items_icon_size, m_icons_texture.items_icon_gap_size);
+            top -= icon_stride;
+        }
+    }
+}
+
+} // namespace GUI
+} // namespace Slic3r

src/slic3r/GUI/GLToolbar.hpp

@@ -0,0 +1,175 @@
+#ifndef slic3r_GLToolbar_hpp_
+#define slic3r_GLToolbar_hpp_
+
+#include "../../slic3r/GUI/GLTexture.hpp"
+#include "../../callback.hpp"
+
+#include <string>
+#include <vector>
+
+namespace Slic3r {
+namespace GUI {
+
+class GLCanvas3D;
+
+class GLToolbarItem
+{
+public:
+    enum EType : unsigned char
+    {
+        Action,
+        Separator,
+        Num_Types
+    };
+
+    enum EState : unsigned char
+    {
+        Normal,
+        Pressed,
+        Disabled,
+        Hover,
+        HoverPressed,
+        Num_States
+    };
+
+    struct Data
+    {
+        std::string name;
+        std::string tooltip;
+        unsigned int sprite_id;
+        bool is_toggable;
+        PerlCallback* action_callback;
+
+        Data();
+    };
+
+private:
+    EType m_type;
+    EState m_state;
+    Data m_data;
+
+public:
+    GLToolbarItem(EType type, const Data& data);
+
+    EState get_state() const;
+    void set_state(EState state);
+
+    const std::string& get_name() const;
+    const std::string& get_tooltip() const;
+
+    void do_action();
+
+    bool is_enabled() const;
+    bool is_hovered() const;
+    bool is_pressed() const;
+
+    bool is_toggable() const;
+    bool is_separator() const;
+
+    void render(unsigned int tex_id, float left, float right, float bottom, float top, unsigned int texture_size, unsigned int border_size, unsigned int icon_size, unsigned int gap_size) const;
+
+private:
+    GLTexture::Quad_UVs get_uvs(unsigned int texture_size, unsigned int border_size, unsigned int icon_size, unsigned int gap_size) const;
+};
+
+class GLToolbar
+{
+public:
+    // items icon textures are assumed to be square and all with the same size in pixels, no internal check is done
+    // icons are layed-out into the texture starting from the top-left corner in the same order as enum GLToolbarItem::EState
+    // from left to right
+    struct ItemsIconsTexture
+    {
+        GLTexture texture;
+        // size of the square icons, in pixels
+        unsigned int items_icon_size;
+        // distance from the border, in pixels
+        unsigned int items_icon_border_size;
+        // distance between two adjacent icons (to avoid filtering artifacts), in pixels
+        unsigned int items_icon_gap_size;
+
+        ItemsIconsTexture();
+    };
+
+    struct Layout
+    {
+        enum Type : unsigned char
+        {
+            Horizontal,
+            Vertical,
+            Num_Types
+        };
+
+        Type type;
+        float top;
+        float left;
+        float separator_size;
+        float gap_size;
+
+        Layout();
+    };
+
+private:
+    typedef std::vector<GLToolbarItem*> ItemsList;
+
+    GLCanvas3D& m_parent;
+    bool m_enabled;
+    ItemsIconsTexture m_icons_texture;
+    Layout m_layout;
+
+    ItemsList m_items;
+
+public:
+    explicit GLToolbar(GLCanvas3D& parent);
+
+    bool init(const std::string& icons_texture_filename, unsigned int items_icon_size, unsigned int items_icon_border_size, unsigned int items_icon_gap_size);
+    
+    Layout::Type get_layout_type() const;
+    void set_layout_type(Layout::Type type);
+
+    void set_position(float top, float left);
+    void set_separator_size(float size);
+    void set_gap_size(float size);
+
+    bool is_enabled() const;
+    void set_enabled(bool enable);
+
+    bool add_item(const GLToolbarItem::Data& data);
+    bool add_separator();
+
+    float get_width() const;
+    float get_height() const;
+
+    void enable_item(const std::string& name);
+    void disable_item(const std::string& name);
+
+    bool is_item_pressed(const std::string& name) const;
+
+    void update_hover_state(const Vec2d& mouse_pos);
+
+    // returns the id of the item under the given mouse position or -1 if none
+    int contains_mouse(const Vec2d& mouse_pos) const;
+
+    void do_action(unsigned int item_id);
+
+    void render() const;
+
+private:
+    float get_width_horizontal() const;
+    float get_width_vertical() const;
+    float get_height_horizontal() const;
+    float get_height_vertical() const;
+    float get_main_size() const;
+    void update_hover_state_horizontal(const Vec2d& mouse_pos);
+    void update_hover_state_vertical(const Vec2d& mouse_pos);
+    int contains_mouse_horizontal(const Vec2d& mouse_pos) const;
+    int contains_mouse_vertical(const Vec2d& mouse_pos) const;
+
+    void render_horizontal() const;
+    void render_vertical() const;
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif // slic3r_GLToolbar_hpp_

src/slic3r/GUI/GUI.hpp

@@ -0,0 +1,260 @@
+#ifndef slic3r_GUI_hpp_
+#define slic3r_GUI_hpp_
+
+#include <string>
+#include <vector>
+#include "PrintConfig.hpp"
+#include "../../callback.hpp"
+#include "GUI_ObjectParts.hpp"
+
+#include <wx/intl.h>
+#include <wx/string.h>
+
+class wxApp;
+class wxWindow;
+class wxFrame;
+class wxMenuBar;
+class wxNotebook;
+class wxPanel;
+class wxComboCtrl;
+class wxString;
+class wxArrayString;
+class wxArrayLong;
+class wxColour;
+class wxBoxSizer;
+class wxFlexGridSizer;
+class wxButton;
+class wxFileDialog;
+class wxStaticBitmap;
+class wxFont;
+class wxTopLevelWindow;
+
+namespace Slic3r { 
+
+class PresetBundle;
+class PresetCollection;
+class Print;
+class ProgressStatusBar;
+class AppConfig;
+class PresetUpdater;
+class DynamicPrintConfig;
+class TabIface;
+class PreviewIface;
+class Print;
+class GCodePreviewData;
+
+#define _(s)    Slic3r::GUI::I18N::translate((s))
+
+namespace GUI { namespace I18N {
+	inline wxString translate(const char *s)    	 { return wxGetTranslation(wxString(s, wxConvUTF8)); }
+	inline wxString translate(const wchar_t *s) 	 { return wxGetTranslation(s); }
+	inline wxString translate(const std::string &s)  { return wxGetTranslation(wxString(s.c_str(), wxConvUTF8)); }
+	inline wxString translate(const std::wstring &s) { return wxGetTranslation(s.c_str()); }
+} }
+
+// !!! If you needed to translate some wxString,
+// !!! please use _(L(string))
+// !!! _() - is a standard wxWidgets macro to translate
+// !!! L() is used only for marking localizable string 
+// !!! It will be used in "xgettext" to create a Locating Message Catalog.
+#define L(s) s
+
+//! macro used to localization, return wxScopedCharBuffer
+//! With wxConvUTF8 explicitly specify that the source string is already in UTF-8 encoding
+#define _CHB(s) wxGetTranslation(wxString(s, wxConvUTF8)).utf8_str()
+
+// Minimal buffer length for translated string (char buf[MIN_BUF_LENGTH_FOR_L])
+#define MIN_BUF_LENGTH_FOR_L	512
+
+namespace GUI {
+
+class Tab;
+class ConfigOptionsGroup;
+// Map from an file_type name to full file wildcard name.
+typedef std::map<std::string, std::string> t_file_wild_card;
+inline t_file_wild_card& get_file_wild_card() {
+	static t_file_wild_card FILE_WILDCARDS;
+	if (FILE_WILDCARDS.empty()){
+		FILE_WILDCARDS["known"]	= "Known files (*.stl, *.obj, *.amf, *.xml, *.prusa)|*.stl;*.STL;*.obj;*.OBJ;*.amf;*.AMF;*.xml;*.XML;*.prusa;*.PRUSA";
+		FILE_WILDCARDS["stl"]	= "STL files (*.stl)|*.stl;*.STL";
+		FILE_WILDCARDS["obj"]	= "OBJ files (*.obj)|*.obj;*.OBJ";
+        FILE_WILDCARDS["amf"]	= "AMF files (*.amf)|*.zip.amf;*.amf;*.AMF;*.xml;*.XML";
+        FILE_WILDCARDS["3mf"]	= "3MF files (*.3mf)|*.3mf;*.3MF;";
+        FILE_WILDCARDS["prusa"]	= "Prusa Control files (*.prusa)|*.prusa;*.PRUSA";
+		FILE_WILDCARDS["ini"]	= "INI files *.ini|*.ini;*.INI";
+		FILE_WILDCARDS["gcode"] = "G-code files (*.gcode, *.gco, *.g, *.ngc)|*.gcode;*.GCODE;*.gco;*.GCO;*.g;*.G;*.ngc;*.NGC";
+		FILE_WILDCARDS["svg"]	= "SVG files *.svg|*.svg;*.SVG";
+	}
+	return FILE_WILDCARDS;
+}
+
+struct PresetTab {
+    std::string       name;
+    Tab*              panel;
+    PrinterTechnology technology;
+};
+
+
+void disable_screensaver();
+void enable_screensaver();
+bool debugged();
+void break_to_debugger();
+
+// Passing the wxWidgets GUI classes instantiated by the Perl part to C++.
+void set_wxapp(wxApp *app);
+void set_main_frame(wxFrame *main_frame);
+void set_progress_status_bar(ProgressStatusBar *prsb);
+void set_tab_panel(wxNotebook *tab_panel);
+void set_plater(wxPanel *plater);
+void set_app_config(AppConfig *app_config);
+void set_preset_bundle(PresetBundle *preset_bundle);
+void set_preset_updater(PresetUpdater *updater);
+void set_objects_from_perl(	wxWindow* parent,
+							wxBoxSizer *frequently_changed_parameters_sizer,
+							wxBoxSizer *info_sizer,
+							wxButton *btn_export_gcode,
+							wxButton *btn_reslice,
+							wxButton *btn_print,
+							wxButton *btn_send_gcode,
+							wxStaticBitmap *manifold_warning_icon);
+void set_show_print_info(bool show);
+void set_show_manifold_warning_icon(bool show);
+void set_objects_list_sizer(wxBoxSizer *objects_list_sizer);
+
+AppConfig*		get_app_config();
+wxApp*			get_app();
+PresetBundle*	get_preset_bundle();
+wxFrame*		get_main_frame();
+ProgressStatusBar* get_progress_status_bar();
+wxNotebook *	get_tab_panel();
+wxNotebook*		get_tab_panel();
+
+const wxColour& get_label_clr_modified();
+const wxColour& get_label_clr_sys();
+const wxColour& get_label_clr_default();
+unsigned get_colour_approx_luma(const wxColour &colour);
+void set_label_clr_modified(const wxColour& clr);
+void set_label_clr_sys(const wxColour& clr);
+
+const wxFont& small_font();
+const wxFont& bold_font();
+
+void open_model(wxWindow *parent, wxArrayString& input_files);
+
+wxWindow*			get_right_panel();
+const size_t&		label_width();
+
+Tab*         get_tab(const std::string& name);
+const std::vector<PresetTab>& get_preset_tabs();
+
+extern void add_menus(wxMenuBar *menu, int event_preferences_changed, int event_language_change);
+
+// This is called when closing the application, when loading a config file or when starting the config wizard
+// to notify the user whether he is aware that some preset changes will be lost.
+extern bool check_unsaved_changes();
+
+// Checks if configuration wizard needs to run, calls config_wizard if so.
+// Returns whether the Wizard ran.
+extern bool config_wizard_startup(bool app_config_exists);
+
+// Opens the configuration wizard, returns true if wizard is finished & accepted.
+// The run_reason argument is actually ConfigWizard::RunReason, but int is used here because of Perl.
+extern void config_wizard(int run_reason);
+
+// Create "Preferences" dialog after selecting menu "Preferences" in Perl part
+extern void open_preferences_dialog(int event_preferences);
+
+// Create a new preset tab (print, filament and printer),
+void create_preset_tabs(int event_value_change, int event_presets_changed);
+TabIface* get_preset_tab_iface(char *name);
+
+PreviewIface* create_preview_iface(wxNotebook* notebook, DynamicPrintConfig* config, Print* print, GCodePreviewData* gcode_preview_data);
+
+// add it at the end of the tab panel.
+void add_created_tab(Tab* panel, int event_value_change, int event_presets_changed);
+// Change option value in config
+void change_opt_value(DynamicPrintConfig& config, const t_config_option_key& opt_key, const boost::any& value, int opt_index = 0);
+
+// Update UI / Tabs to reflect changes in the currently loaded presets
+void load_current_presets();
+
+void show_error(wxWindow* parent, const wxString& message);
+void show_error_id(int id, const std::string& message);   // For Perl
+void show_info(wxWindow* parent, const wxString& message, const wxString& title);
+void warning_catcher(wxWindow* parent, const wxString& message);
+
+// Assign a Lambda to the print object to emit a wxWidgets Command with the provided ID
+// to deliver a progress status message.
+void set_print_callback_event(Print *print, int id);
+
+// load language saved at application config 
+bool load_language();
+// save language at application config 
+void save_language();
+// get list of installed languages 
+void get_installed_languages(wxArrayString & names, wxArrayLong & identifiers);
+// select language from the list of installed languages
+bool select_language(wxArrayString & names, wxArrayLong & identifiers);
+// update right panel of the Plater according to view mode
+void update_mode();
+
+void show_info_sizer(const bool show);
+
+std::vector<Tab *>& get_tabs_list();
+bool checked_tab(Tab* tab);
+void delete_tab_from_list(Tab* tab);
+
+// Creates a wxCheckListBoxComboPopup inside the given wxComboCtrl, filled with the given text and items.
+// Items are all initialized to the given value.
+// Items must be separated by '|', for example "Item1|Item2|Item3", and so on.
+void create_combochecklist(wxComboCtrl* comboCtrl, std::string text, std::string items, bool initial_value);
+
+// Returns the current state of the items listed in the wxCheckListBoxComboPopup contained in the given wxComboCtrl,
+// encoded inside an int.
+int combochecklist_get_flags(wxComboCtrl* comboCtrl);
+
+// Return translated std::string as a wxString
+wxString	L_str(const std::string &str);
+// Return wxString from std::string in UTF8
+wxString	from_u8(const std::string &str);
+
+void set_model_events_from_perl(Model &model,
+							    int event_object_selection_changed,
+							    int event_object_settings_changed,
+							    int event_remove_object, 
+							    int event_update_scene);
+void add_frequently_changed_parameters(wxWindow* parent, wxBoxSizer* sizer, wxFlexGridSizer* preset_sizer);
+// Update view mode according to selected menu 
+void update_mode();
+bool is_expert_mode();
+
+// Callback to trigger a configuration update timer on the Plater.
+static PerlCallback g_on_request_update_callback;
+ 
+ConfigOptionsGroup* get_optgroup(size_t i); 
+std::vector <std::shared_ptr<ConfigOptionsGroup>>& get_optgroups();
+wxButton*			get_wiping_dialog_button();
+
+void add_export_option(wxFileDialog* dlg, const std::string& format);
+int get_export_option(wxFileDialog* dlg);
+
+// Returns the dimensions of the screen on which the main frame is displayed
+bool get_current_screen_size(wxWindow *window, unsigned &width, unsigned &height);
+
+// Save window size and maximized status into AppConfig
+void save_window_size(wxTopLevelWindow *window, const std::string &name);
+// Restore the above
+void restore_window_size(wxTopLevelWindow *window, const std::string &name);
+
+// Update buttons view according to enable/disable
+void enable_action_buttons(bool enable);
+
+// Display an About dialog
+extern void about();
+// Ask the destop to open the datadir using the default file explorer.
+extern void desktop_open_datadir_folder();
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif

src/slic3r/GUI/GUI_ObjectParts.hpp

@@ -0,0 +1,147 @@
+#ifndef slic3r_GUI_ObjectParts_hpp_
+#define slic3r_GUI_ObjectParts_hpp_
+
+class wxWindow;
+class wxSizer;
+class wxBoxSizer;
+class wxString;
+class wxArrayString;
+class wxMenu;
+class wxDataViewEvent;
+class wxKeyEvent;
+class wxGLCanvas;
+class wxBitmap;
+
+namespace Slic3r {
+class ModelObject;
+class Model;
+
+namespace GUI {
+//class wxGLCanvas;
+
+enum ogGroup{
+	ogFrequentlyChangingParameters,
+	ogFrequentlyObjectSettings,
+	ogCurrentSettings
+// 	ogObjectSettings,
+// 	ogObjectMovers,
+// 	ogPartSettings
+};
+
+enum LambdaTypeIDs{
+	LambdaTypeBox,
+	LambdaTypeCylinder,
+	LambdaTypeSphere,
+	LambdaTypeSlab
+};
+
+struct OBJECT_PARAMETERS
+{
+	LambdaTypeIDs	type = LambdaTypeBox;
+	double			dim[3];// = { 1.0, 1.0, 1.0 };
+	int				cyl_r = 1;
+	int				cyl_h = 1;
+	double			sph_rho = 1.0;
+	double			slab_h = 1.0;
+	double			slab_z = 0.0;
+};
+
+typedef std::map<std::string, wxBitmap> t_category_icon;
+inline t_category_icon& get_category_icon();
+
+void add_collapsible_panes(wxWindow* parent, wxBoxSizer* sizer);
+void add_objects_list(wxWindow* parent, wxBoxSizer* sizer);
+void add_object_settings(wxWindow* parent, wxBoxSizer* sizer);
+void show_collpane_settings(bool expert_mode);
+
+wxMenu *create_add_settings_popupmenu(bool is_part);
+wxMenu *create_add_part_popupmenu();
+wxMenu *create_part_settings_popupmenu();
+
+// Add object to the list
+//void add_object(const std::string &name);
+void add_object_to_list(const std::string &name, ModelObject* model_object);
+// Delete object from the list
+void delete_object_from_list();
+// Delete all objects from the list
+void delete_all_objects_from_list();
+// Set count of object on c++ side
+void set_object_count(int idx, int count);
+// Unselect all objects in the list on c++ side
+void unselect_objects();
+// Select current object in the list on c++ side
+void select_current_object(int idx);
+// Select current volume in the list on c++ side
+void select_current_volume(int idx, int vol_idx);
+// Remove objects/sub-object from the list
+void remove();
+
+void object_ctrl_selection_changed();
+void object_ctrl_context_menu();
+void object_ctrl_key_event(wxKeyEvent& event);
+void object_ctrl_item_value_change(wxDataViewEvent& event);
+void show_context_menu();
+bool is_splittable_object(const bool split_part);
+
+void init_mesh_icons();
+void set_event_object_selection_changed(const int& event);
+void set_event_object_settings_changed(const int& event); 
+void set_event_remove_object(const int& event);
+void set_event_update_scene(const int& event);
+void set_objects_from_model(Model &model);
+
+bool is_parts_changed();
+bool is_part_settings_changed();
+
+void load_part(	ModelObject* model_object, 
+				wxArrayString& part_names, const bool is_modifier); 
+
+void load_lambda( ModelObject* model_object, 
+				wxArrayString& part_names, const bool is_modifier); 
+void load_lambda( const std::string& type_name);
+
+void on_btn_load(bool is_modifier = false, bool is_lambda = false);
+void on_btn_del();
+void on_btn_split(const bool split_part);
+void on_btn_move_up();
+void on_btn_move_down();
+
+void parts_changed(int obj_idx);
+void part_selection_changed();
+
+void update_settings_value();
+// show/hide "Extruder" column for Objects List
+void set_extruder_column_hidden(bool hide);
+// update extruder in current config
+void update_extruder_in_config(const wxString& selection);
+// update position values displacements or "gizmos"
+void update_position_values();
+void update_position_values(const Vec3d& position);
+// update scale values after scale unit changing or "gizmos"
+void update_scale_values();
+void update_scale_values(double scaling_factor);
+// update rotation values object selection changing
+void update_rotation_values();
+// update rotation value after "gizmos"
+void update_rotation_value(double angle, Axis axis);
+void set_uniform_scaling(const bool uniform_scale);
+
+void on_begin_drag(wxDataViewEvent &event);
+void on_drop_possible(wxDataViewEvent &event);
+void on_drop(wxDataViewEvent &event);
+
+// update extruder column for objects_ctrl according to extruders count
+void update_objects_list_extruder_column(int extruders_count);
+
+// Create/Update/Reset double slider on 3dPreview
+void create_double_slider(wxWindow* parent, wxBoxSizer* sizer, wxGLCanvas* canvas);
+void update_double_slider(bool force_sliders_full_range);
+void reset_double_slider();
+// update DoubleSlider after keyDown in canvas
+void update_double_slider_from_canvas(wxKeyEvent& event);
+
+void show_manipulation_sizer(const bool is_simple_mode);
+
+} //namespace GUI
+} //namespace Slic3r 
+#endif  //slic3r_GUI_ObjectParts_hpp_

src/slic3r/GUI/LambdaObjectDialog.cpp

@@ -0,0 +1,199 @@
+#include "LambdaObjectDialog.hpp"
+
+#include <wx/window.h>
+#include <wx/button.h>
+#include "OptionsGroup.hpp"
+
+namespace Slic3r
+{
+namespace GUI
+{
+static wxString dots("…", wxConvUTF8);
+
+LambdaObjectDialog::LambdaObjectDialog(wxWindow* parent,
+                                       const wxString type_name):
+                                       m_type_name(type_name)
+{
+	Create(parent, wxID_ANY, _(L("Lambda Object")),
+        parent->GetScreenPosition(), wxDefaultSize,
+		wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER);
+
+	// instead of double dim[3] = { 1.0, 1.0, 1.0 };
+	object_parameters.dim[0] = 1.0;
+	object_parameters.dim[1] = 1.0;
+	object_parameters.dim[2] = 1.0;
+
+	sizer = new wxBoxSizer(wxVERTICAL);
+
+	// modificator options
+    if (m_type_name == wxEmptyString) {
+        m_modificator_options_book = new wxChoicebook(  this, wxID_ANY, wxDefaultPosition,
+                                                        wxDefaultSize, wxCHB_TOP);
+        sizer->Add(m_modificator_options_book, 1, wxEXPAND | wxALL, 10);
+    }
+    else {
+        m_panel = new wxPanel(this, wxID_ANY, wxDefaultPosition, wxDefaultSize);
+        sizer->Add(m_panel, 1, wxEXPAND | wxALL, 10);
+    }
+
+    ConfigOptionDef def;
+    def.width = 70;
+	auto optgroup = init_modificator_options_page(_(L("Box")));
+    if (optgroup){
+		optgroup->m_on_change = [this](t_config_option_key opt_key, boost::any value){
+			int opt_id =	opt_key == "l" ? 0 :
+							opt_key == "w" ? 1 : 
+							opt_key == "h" ? 2 : -1;
+			if (opt_id < 0) return;
+			object_parameters.dim[opt_id] = boost::any_cast<double>(value);
+		};
+
+		def.type = coFloat;
+		def.default_value = new ConfigOptionFloat{ 1.0 };
+		def.label = L("L");
+		Option option(def, "l");
+		optgroup->append_single_option_line(option);
+		
+		def.label = L("W");
+		option = Option(def, "w");
+		optgroup->append_single_option_line(option);
+		
+		def.label = L("H");
+		option = Option(def, "h");
+		optgroup->append_single_option_line(option);
+	}
+
+	optgroup = init_modificator_options_page(_(L("Cylinder")));
+	if (optgroup){
+		optgroup->m_on_change = [this](t_config_option_key opt_key, boost::any value){
+			int val = boost::any_cast<int>(value);
+			if (opt_key == "cyl_r")
+				object_parameters.cyl_r = val;
+			else if (opt_key == "cyl_h")
+				object_parameters.cyl_h = val;
+			else return;
+		};
+
+		def.type = coInt;
+		def.default_value = new ConfigOptionInt{ 1 };
+		def.label = L("Radius");
+		auto option = Option(def, "cyl_r");
+		optgroup->append_single_option_line(option);
+
+		def.label = L("Height");
+		option = Option(def, "cyl_h");
+		optgroup->append_single_option_line(option);
+    }
+
+	optgroup = init_modificator_options_page(_(L("Sphere")));
+	if (optgroup){
+		optgroup->m_on_change = [this](t_config_option_key opt_key, boost::any value){
+			if (opt_key == "sph_rho")
+				object_parameters.sph_rho = boost::any_cast<double>(value);
+			else return;
+		};
+
+		def.type = coFloat;
+		def.default_value = new ConfigOptionFloat{ 1.0 };
+		def.label = L("Rho");
+		auto option = Option(def, "sph_rho");
+		optgroup->append_single_option_line(option);
+	}
+
+	optgroup = init_modificator_options_page(_(L("Slab")));
+	if (optgroup){
+		optgroup->m_on_change = [this](t_config_option_key opt_key, boost::any value){
+			double val = boost::any_cast<double>(value);
+			if (opt_key == "slab_z")
+				object_parameters.slab_z = val;
+			else if (opt_key == "slab_h")
+				object_parameters.slab_h = val;
+			else return;
+		};
+
+		def.type = coFloat;
+		def.default_value = new ConfigOptionFloat{ 1.0 };
+		def.label = L("H");
+		auto option = Option(def, "slab_h");
+		optgroup->append_single_option_line(option);
+
+		def.label = L("Initial Z");
+		option = Option(def, "slab_z");
+		optgroup->append_single_option_line(option);
+	}
+
+	Bind(wxEVT_CHOICEBOOK_PAGE_CHANGED, ([this](wxCommandEvent e)
+	{
+		auto page_idx = m_modificator_options_book->GetSelection();
+		if (page_idx < 0) return;
+		switch (page_idx)
+		{
+		case 0:
+			object_parameters.type = LambdaTypeBox;
+			break;
+		case 1:
+			object_parameters.type = LambdaTypeCylinder;
+			break;
+		case 2:
+			object_parameters.type = LambdaTypeSphere;
+			break;
+		case 3:
+			object_parameters.type = LambdaTypeSlab;
+			break;
+		default:
+			break;
+		}
+	}));
+
+	const auto button_sizer = CreateStdDialogButtonSizer(wxOK | wxCANCEL);
+
+	wxButton* btn_OK = static_cast<wxButton*>(FindWindowById(wxID_OK, this));
+	btn_OK->Bind(wxEVT_BUTTON, [this](wxCommandEvent&) {
+		// validate user input
+		if (!CanClose())return;
+		EndModal(wxID_OK);
+		Destroy();
+	});
+
+	wxButton* btn_CANCEL = static_cast<wxButton*>(FindWindowById(wxID_CANCEL, this));
+	btn_CANCEL->Bind(wxEVT_BUTTON, [this](wxCommandEvent&) {
+		// validate user input
+		if (!CanClose())return;
+		EndModal(wxID_CANCEL);
+		Destroy();
+	});
+
+	sizer->Add(button_sizer, 0, wxALIGN_CENTER_HORIZONTAL | wxBOTTOM, 10);
+
+	SetSizer(sizer);
+	sizer->Fit(this);
+	sizer->SetSizeHints(this);
+}
+
+// Called from the constructor.
+// Create a panel for a rectangular / circular / custom bed shape.
+ConfigOptionsGroupShp LambdaObjectDialog::init_modificator_options_page(const wxString& title){
+    if (!m_type_name.IsEmpty() && m_type_name != title)
+        return nullptr;
+
+    auto panel = m_type_name.IsEmpty() ? new wxPanel(m_modificator_options_book) : m_panel;
+
+	ConfigOptionsGroupShp optgroup;
+	optgroup = std::make_shared<ConfigOptionsGroup>(panel, _(L("Add")) + " " +title + " " +dots);
+	optgroup->label_width = 100;
+
+	m_optgroups.push_back(optgroup);
+
+    if (m_type_name.IsEmpty()) {
+        panel->SetSizerAndFit(optgroup->sizer);
+        m_modificator_options_book->AddPage(panel, title);
+    }
+    else
+        panel->SetSizer(optgroup->sizer);
+
+	return optgroup;
+}
+
+
+} //namespace GUI
+} //namespace Slic3r 

src/slic3r/GUI/LambdaObjectDialog.hpp

@@ -0,0 +1,40 @@
+#ifndef slic3r_LambdaObjectDialog_hpp_
+#define slic3r_LambdaObjectDialog_hpp_
+
+#include "GUI.hpp"
+
+#include <wx/dialog.h>
+#include <wx/sizer.h>
+#include <wx/choicebk.h>
+
+class wxPanel;
+
+namespace Slic3r
+{
+namespace GUI
+{
+using ConfigOptionsGroupShp = std::shared_ptr<ConfigOptionsGroup>;
+class LambdaObjectDialog : public wxDialog
+{
+	wxChoicebook*	m_modificator_options_book = nullptr;
+	std::vector <ConfigOptionsGroupShp>	m_optgroups;
+    wxString        m_type_name;
+    wxPanel*        m_panel = nullptr;
+public:
+    LambdaObjectDialog(wxWindow* parent, 
+                       const wxString type_name = wxEmptyString);
+	~LambdaObjectDialog(){}
+
+	bool CanClose() { return true; }	// ???
+	OBJECT_PARAMETERS& ObjectParameters(){ return object_parameters; }
+
+	ConfigOptionsGroupShp init_modificator_options_page(const wxString& title);
+	
+	// Note whether the window was already closed, so a pending update is not executed.
+	bool m_already_closed = false;
+	OBJECT_PARAMETERS object_parameters;
+	wxBoxSizer* sizer = nullptr;
+};
+} //namespace GUI
+} //namespace Slic3r 
+#endif  //slic3r_LambdaObjectDialog_hpp_

src/slic3r/GUI/MsgDialog.cpp

@@ -0,0 +1,88 @@
+#include "MsgDialog.hpp"
+
+#include <wx/settings.h>
+#include <wx/sizer.h>
+#include <wx/stattext.h>
+#include <wx/button.h>
+#include <wx/statbmp.h>
+#include <wx/scrolwin.h>
+
+#include "libslic3r/libslic3r.h"
+#include "libslic3r/Utils.hpp"
+#include "GUI.hpp"
+#include "ConfigWizard.hpp"
+
+namespace Slic3r {
+namespace GUI {
+
+
+MsgDialog::MsgDialog(wxWindow *parent, const wxString &title, const wxString &headline, wxWindowID button_id) :
+	MsgDialog(parent, title, headline, wxBitmap(from_u8(Slic3r::var("Slic3r_192px.png")), wxBITMAP_TYPE_PNG), button_id)
+{}
+
+MsgDialog::MsgDialog(wxWindow *parent, const wxString &title, const wxString &headline, wxBitmap bitmap, wxWindowID button_id) :
+	wxDialog(parent, wxID_ANY, title),
+	boldfont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT)),
+	content_sizer(new wxBoxSizer(wxVERTICAL)),
+	btn_sizer(new wxBoxSizer(wxHORIZONTAL))
+{
+	boldfont.SetWeight(wxFONTWEIGHT_BOLD);
+
+	auto *topsizer = new wxBoxSizer(wxHORIZONTAL);
+	auto *rightsizer = new wxBoxSizer(wxVERTICAL);
+
+	auto *headtext = new wxStaticText(this, wxID_ANY, headline);
+	headtext->SetFont(boldfont);
+	headtext->Wrap(CONTENT_WIDTH);
+	rightsizer->Add(headtext);
+	rightsizer->AddSpacer(VERT_SPACING);
+
+	rightsizer->Add(content_sizer, 1, wxEXPAND);
+
+	if (button_id != wxID_NONE) {
+		auto *button = new wxButton(this, button_id);
+		button->SetFocus();
+		btn_sizer->Add(button);
+	}
+
+	rightsizer->Add(btn_sizer, 0, wxALIGN_CENTRE_HORIZONTAL);
+
+	auto *logo = new wxStaticBitmap(this, wxID_ANY, std::move(bitmap));
+
+	topsizer->Add(logo, 0, wxALL, BORDER);
+	topsizer->Add(rightsizer, 1, wxALL | wxEXPAND, BORDER);
+
+	SetSizerAndFit(topsizer);
+}
+
+MsgDialog::~MsgDialog() {}
+
+
+// ErrorDialog
+
+ErrorDialog::ErrorDialog(wxWindow *parent, const wxString &msg) :
+	MsgDialog(parent, _(L("Slic3r error")), _(L("Slic3r has encountered an error")), wxBitmap(from_u8(Slic3r::var("Slic3r_192px_grayscale.png")), wxBITMAP_TYPE_PNG))
+{
+	auto *panel = new wxScrolledWindow(this);
+	auto *p_sizer = new wxBoxSizer(wxVERTICAL);
+	panel->SetSizer(p_sizer);
+
+	auto *text = new wxStaticText(panel, wxID_ANY, msg);
+	text->Wrap(CONTENT_WIDTH);
+	p_sizer->Add(text, 1, wxEXPAND);
+
+	panel->SetMinSize(wxSize(CONTENT_WIDTH, 0));
+	panel->SetScrollRate(0, 5);
+
+	content_sizer->Add(panel, 1, wxEXPAND);
+
+	SetMaxSize(wxSize(-1, CONTENT_MAX_HEIGHT));
+	Fit();
+}
+
+ErrorDialog::~ErrorDialog() {}
+
+
+
+}
+}

src/slic3r/GUI/MsgDialog.hpp

@@ -0,0 +1,67 @@
+#ifndef slic3r_MsgDialog_hpp_
+#define slic3r_MsgDialog_hpp_
+
+#include <string>
+#include <unordered_map>
+
+#include <wx/dialog.h>
+#include <wx/font.h>
+#include <wx/bitmap.h>
+
+#include "slic3r/Utils/Semver.hpp"
+
+class wxBoxSizer;
+class wxCheckBox;
+
+namespace Slic3r {
+
+namespace GUI {
+
+
+// A message / query dialog with a bitmap on the left and any content on the right
+// with buttons underneath.
+struct MsgDialog : wxDialog
+{
+	MsgDialog(MsgDialog &&) = delete;
+	MsgDialog(const MsgDialog &) = delete;
+	MsgDialog &operator=(MsgDialog &&) = delete;
+	MsgDialog &operator=(const MsgDialog &) = delete;
+	virtual ~MsgDialog();
+
+	// TODO: refactor with CreateStdDialogButtonSizer usage
+
+protected:
+	enum {
+		CONTENT_WIDTH = 500,
+		CONTENT_MAX_HEIGHT = 600,
+		BORDER = 30,
+		VERT_SPACING = 15,
+		HORIZ_SPACING = 5,
+	};
+
+	// button_id is an id of a button that can be added by default, use wxID_NONE to disable
+	MsgDialog(wxWindow *parent, const wxString &title, const wxString &headline, wxWindowID button_id = wxID_OK);
+	MsgDialog(wxWindow *parent, const wxString &title, const wxString &headline, wxBitmap bitmap, wxWindowID button_id = wxID_OK);
+
+	wxFont boldfont;
+	wxBoxSizer *content_sizer;
+	wxBoxSizer *btn_sizer;
+};
+
+
+// Generic error dialog, used for displaying exceptions
+struct ErrorDialog : MsgDialog
+{
+	ErrorDialog(wxWindow *parent, const wxString &msg);
+	ErrorDialog(ErrorDialog &&) = delete;
+	ErrorDialog(const ErrorDialog &) = delete;
+	ErrorDialog &operator=(ErrorDialog &&) = delete;
+	ErrorDialog &operator=(const ErrorDialog &) = delete;
+	virtual ~ErrorDialog();
+};
+
+
+}
+}
+
+#endif

src/slic3r/GUI/OptionsGroup.cpp

@@ -0,0 +1,545 @@
+#include "OptionsGroup.hpp"
+#include "ConfigExceptions.hpp"
+
+#include <utility>
+#include <wx/numformatter.h>
+#include <boost/algorithm/string/split.hpp>
+#include <boost/algorithm/string/classification.hpp>
+#include "Utils.hpp"
+
+namespace Slic3r { namespace GUI {
+
+const t_field& OptionsGroup::build_field(const Option& opt, wxStaticText* label/* = nullptr*/) {
+    return build_field(opt.opt_id, opt.opt, label);
+}
+const t_field& OptionsGroup::build_field(const t_config_option_key& id, wxStaticText* label/* = nullptr*/) {
+	const ConfigOptionDef& opt = m_options.at(id).opt;
+    return build_field(id, opt, label);
+}
+
+const t_field& OptionsGroup::build_field(const t_config_option_key& id, const ConfigOptionDef& opt, wxStaticText* label/* = nullptr*/) {
+    // Check the gui_type field first, fall through
+    // is the normal type.
+    if (opt.gui_type.compare("select") == 0) {
+    } else if (opt.gui_type.compare("select_open") == 0) {
+		m_fields.emplace(id, STDMOVE(Choice::Create<Choice>(parent(), opt, id)));
+    } else if (opt.gui_type.compare("color") == 0) {
+		m_fields.emplace(id, STDMOVE(ColourPicker::Create<ColourPicker>(parent(), opt, id)));
+    } else if (opt.gui_type.compare("f_enum_open") == 0 || 
+                opt.gui_type.compare("i_enum_open") == 0 ||
+                opt.gui_type.compare("i_enum_closed") == 0) {
+		m_fields.emplace(id, STDMOVE(Choice::Create<Choice>(parent(), opt, id)));
+    } else if (opt.gui_type.compare("slider") == 0) {
+		m_fields.emplace(id, STDMOVE(SliderCtrl::Create<SliderCtrl>(parent(), opt, id)));
+    } else if (opt.gui_type.compare("i_spin") == 0) { // Spinctrl
+    } else if (opt.gui_type.compare("legend") == 0) { // StaticText
+		m_fields.emplace(id, STDMOVE(StaticText::Create<StaticText>(parent(), opt, id)));
+    } else { 
+        switch (opt.type) {
+            case coFloatOrPercent:
+            case coFloat:
+            case coFloats:
+			case coPercent:
+			case coPercents:
+			case coString:
+			case coStrings:
+				m_fields.emplace(id, STDMOVE(TextCtrl::Create<TextCtrl>(parent(), opt, id)));
+                break;
+			case coBool:
+			case coBools:
+				m_fields.emplace(id, STDMOVE(CheckBox::Create<CheckBox>(parent(), opt, id)));
+				break;
+			case coInt:
+			case coInts:
+				m_fields.emplace(id, STDMOVE(SpinCtrl::Create<SpinCtrl>(parent(), opt, id)));
+				break;
+            case coEnum:
+				m_fields.emplace(id, STDMOVE(Choice::Create<Choice>(parent(), opt, id)));
+				break;
+            case coPoints:
+				m_fields.emplace(id, STDMOVE(PointCtrl::Create<PointCtrl>(parent(), opt, id)));
+				break;
+            case coNone:   break;
+            default:
+				throw /*//!ConfigGUITypeError("")*/std::logic_error("This control doesn't exist till now"); break;
+        }
+    }
+    // Grab a reference to fields for convenience
+    const t_field& field = m_fields[id];
+	field->m_on_change = [this](std::string opt_id, boost::any value){
+			//! This function will be called from Field.					
+			//! Call OptionGroup._on_change(...)
+			if (!m_disabled) 
+				this->on_change_OG(opt_id, value);
+	};
+	field->m_on_kill_focus = [this](){
+			//! This function will be called from Field.					
+			if (!m_disabled) 
+				this->on_kill_focus();
+	};
+    field->m_parent = parent();
+	
+	//! Label to change background color, when option is modified
+	field->m_Label = label;
+	field->m_back_to_initial_value = [this](std::string opt_id){
+		if (!m_disabled)
+			this->back_to_initial_value(opt_id);
+	};
+	field->m_back_to_sys_value = [this](std::string opt_id){
+		if (!this->m_disabled)
+			this->back_to_sys_value(opt_id);
+	};
+    
+	// assign function objects for callbacks, etc.
+    return field;
+}
+
+void OptionsGroup::add_undo_buttuns_to_sizer(wxSizer* sizer, const t_field& field)
+{
+	if (!m_show_modified_btns) {
+		field->m_Undo_btn->Hide();
+		field->m_Undo_to_sys_btn->Hide();
+		return;
+	}
+
+	sizer->Add(field->m_Undo_to_sys_btn, 0, wxALIGN_CENTER_VERTICAL);
+	sizer->Add(field->m_Undo_btn, 0, wxALIGN_CENTER_VERTICAL);
+}
+
+void OptionsGroup::append_line(const Line& line, wxStaticText**	colored_Label/* = nullptr*/) {
+//!    if (line.sizer != nullptr || (line.widget != nullptr && line.full_width > 0)){
+	if ( (line.sizer != nullptr || line.widget != nullptr) && line.full_width){
+		if (line.sizer != nullptr) {
+            sizer->Add(line.sizer, 0, wxEXPAND | wxALL, wxOSX ? 0 : 15);
+            return;
+        }
+        if (line.widget != nullptr) {
+            sizer->Add(line.widget(m_parent), 0, wxEXPAND | wxALL, wxOSX ? 0 : 15);
+            return;
+        }
+    }
+
+	auto option_set = line.get_options();
+	for (auto opt : option_set) 
+		m_options.emplace(opt.opt_id, opt);
+
+	// if we have a single option with no label, no sidetext just add it directly to sizer
+	if (option_set.size() == 1 && label_width == 0 && option_set.front().opt.full_width &&
+		option_set.front().opt.sidetext.size() == 0 && option_set.front().side_widget == nullptr && 
+		line.get_extra_widgets().size() == 0) {
+		wxSizer* tmp_sizer;
+#ifdef __WXGTK__
+		tmp_sizer = new wxBoxSizer(wxVERTICAL);
+        m_panel->SetSizer(tmp_sizer);
+        m_panel->Layout();
+#else
+        tmp_sizer = sizer;
+#endif /* __WXGTK__ */
+
+		const auto& option = option_set.front();
+		const auto& field = build_field(option);
+
+		auto btn_sizer = new wxBoxSizer(wxHORIZONTAL);
+		add_undo_buttuns_to_sizer(btn_sizer, field);
+		tmp_sizer->Add(btn_sizer, 0, wxEXPAND | wxALL, 0);
+		if (is_window_field(field))
+			tmp_sizer->Add(field->getWindow(), 0, wxEXPAND | wxALL, wxOSX ? 0 : 5);
+		if (is_sizer_field(field))
+			tmp_sizer->Add(field->getSizer(), 0, wxEXPAND | wxALL, wxOSX ? 0 : 5);
+		return;
+	}
+
+    auto grid_sizer = m_grid_sizer;
+#ifdef __WXGTK__
+        m_panel->SetSizer(m_grid_sizer);
+        m_panel->Layout();
+#endif /* __WXGTK__ */
+
+	// if we have an extra column, build it
+	if (extra_column) {
+		if (extra_column) {
+			grid_sizer->Add(extra_column(parent(), line), 0, wxALIGN_CENTER_VERTICAL|wxRIGHT, 3);
+		}
+		else {
+			// if the callback provides no sizer for the extra cell, put a spacer
+			grid_sizer->AddSpacer(1);
+		}
+	}
+
+
+    // Build a label if we have it
+	wxStaticText* label=nullptr;
+    if (label_width != 0) {
+		long label_style = staticbox ? 0 : wxALIGN_RIGHT;
+#ifdef __WXGTK__
+		// workaround for correct text align of the StaticBox on Linux
+		// flags wxALIGN_RIGHT and wxALIGN_CENTRE don't work when Ellipsize flags are _not_ given.
+		// Text is properly aligned only when Ellipsize is checked.
+		label_style |= staticbox ? 0 : wxST_ELLIPSIZE_END;
+#endif /* __WXGTK__ */
+		label = new wxStaticText(parent(), wxID_ANY, line.label + (line.label.IsEmpty() ? "" : ":"), 
+							wxDefaultPosition, wxSize(label_width, -1), label_style);
+        label->SetFont(label_font);
+        label->Wrap(label_width); // avoid a Linux/GTK bug
+        if (!line.near_label_widget)
+		    grid_sizer->Add(label, 0, (staticbox ? 0 : wxALIGN_RIGHT | wxRIGHT) | 
+						    (m_flag == ogSIDE_OPTIONS_VERTICAL ? wxTOP : wxALIGN_CENTER_VERTICAL), 5);
+        else {
+            // If we're here, we have some widget near the label
+            // so we need a horizontal sizer to arrange these things
+            auto sizer = new wxBoxSizer(wxHORIZONTAL);
+            grid_sizer->Add(sizer, 0, wxEXPAND | (staticbox ? wxALL : wxBOTTOM | wxTOP | wxLEFT), staticbox ? 0 : 1);
+            sizer->Add(line.near_label_widget(parent()), 0, wxRIGHT, 7);
+            sizer->Add(label, 0, (staticbox ? 0 : wxALIGN_RIGHT | wxRIGHT) |
+                (m_flag == ogSIDE_OPTIONS_VERTICAL ? wxTOP : wxALIGN_CENTER_VERTICAL), 5);
+        }
+		if (line.label_tooltip.compare("") != 0)
+			label->SetToolTip(line.label_tooltip);
+    }
+
+    // If there's a widget, build it and add the result to the sizer.
+	if (line.widget != nullptr) {
+		auto wgt = line.widget(parent());
+		// If widget doesn't have label, don't use border
+		grid_sizer->Add(wgt, 0, wxEXPAND | wxBOTTOM | wxTOP, (wxOSX || line.label.IsEmpty()) ? 0 : 5);
+		if (colored_Label != nullptr) *colored_Label = label;
+		return;
+	}
+	
+	// If we're here, we have more than one option or a single option with sidetext
+    // so we need a horizontal sizer to arrange these things
+	auto sizer = new wxBoxSizer(m_flag == ogSIDE_OPTIONS_VERTICAL ? wxVERTICAL : wxHORIZONTAL);
+	grid_sizer->Add(sizer, 0, wxEXPAND | (staticbox ? wxALL : wxBOTTOM | wxTOP | wxLEFT), staticbox ? 0 : 1);
+	// If we have a single option with no sidetext just add it directly to the grid sizer
+	if (option_set.size() == 1 && option_set.front().opt.sidetext.size() == 0 &&
+		option_set.front().side_widget == nullptr && line.get_extra_widgets().size() == 0) {
+		const auto& option = option_set.front();
+		const auto& field = build_field(option, label);
+
+		add_undo_buttuns_to_sizer(sizer, field);
+		if (is_window_field(field)) 
+			sizer->Add(field->getWindow(), option.opt.full_width ? 1 : 0, (option.opt.full_width ? wxEXPAND : 0) |
+							wxBOTTOM | wxTOP | wxALIGN_CENTER_VERTICAL, (wxOSX||!staticbox) ? 0 : 2);
+		if (is_sizer_field(field)) 
+			sizer->Add(field->getSizer(), 1, (option.opt.full_width ? wxEXPAND : 0) | wxALIGN_CENTER_VERTICAL, 0);
+		return;
+	}
+
+    for (auto opt : option_set) {
+		ConfigOptionDef option = opt.opt;
+		wxSizer* sizer_tmp;
+		if (m_flag == ogSIDE_OPTIONS_VERTICAL){
+			auto sz = new wxFlexGridSizer(1, 3, 2, 2);
+			sz->RemoveGrowableCol(2);
+			sizer_tmp = sz;
+		}
+    	else
+    		sizer_tmp = sizer;
+		// add label if any
+		if (option.label != "") {
+			wxString str_label = _(option.label);
+//!			To correct translation by context have to use wxGETTEXT_IN_CONTEXT macro from wxWidget 3.1.1
+// 			wxString str_label = (option.label == "Top" || option.label == "Bottom") ?
+// 								wxGETTEXT_IN_CONTEXT("Layers", wxString(option.label.c_str()):
+// 								L_str(option.label);
+			label = new wxStaticText(parent(), wxID_ANY, str_label + ":", wxDefaultPosition, wxDefaultSize);
+			label->SetFont(label_font);
+			sizer_tmp->Add(label, 0, wxALIGN_RIGHT | wxALIGN_CENTER_VERTICAL, 0);
+		}
+
+		// add field
+		const Option& opt_ref = opt;
+		auto& field = build_field(opt_ref, label);
+		add_undo_buttuns_to_sizer(sizer_tmp, field);
+		is_sizer_field(field) ? 
+			sizer_tmp->Add(field->getSizer(), 0, wxALIGN_CENTER_VERTICAL, 0) :
+			sizer_tmp->Add(field->getWindow(), 0, wxALIGN_CENTER_VERTICAL, 0);
+		
+		// add sidetext if any
+		if (option.sidetext != "") {
+			auto sidetext = new wxStaticText(	parent(), wxID_ANY, _(option.sidetext), wxDefaultPosition, 
+												wxSize(sidetext_width, -1)/*wxDefaultSize*/, wxALIGN_LEFT);
+			sidetext->SetFont(sidetext_font);
+			sizer_tmp->Add(sidetext, 0, wxLEFT | wxALIGN_CENTER_VERTICAL, m_flag == ogSIDE_OPTIONS_VERTICAL ? 0 : 4);
+			field->set_side_text_ptr(sidetext);
+		}
+
+		// add side widget if any
+		if (opt.side_widget != nullptr) {
+			sizer_tmp->Add(opt.side_widget(parent())/*!.target<wxWindow>()*/, 0, wxLEFT | wxALIGN_CENTER_VERTICAL, 1);	//! requires verification
+		}
+
+		if (opt.opt_id != option_set.back().opt_id && m_flag != ogSIDE_OPTIONS_VERTICAL) //! istead of (opt != option_set.back())
+		{
+			sizer_tmp->AddSpacer(6);
+	    }
+
+		if (m_flag == ogSIDE_OPTIONS_VERTICAL)
+			sizer->Add(sizer_tmp, 0, wxALIGN_RIGHT|wxALL, 0);
+	}
+	// add extra sizers if any
+	for (auto extra_widget : line.get_extra_widgets()) {
+		sizer->Add(extra_widget(parent())/*!.target<wxWindow>()*/, 0, wxLEFT | wxALIGN_CENTER_VERTICAL, 4);		//! requires verification
+	}
+}
+
+Line OptionsGroup::create_single_option_line(const Option& option) const {
+	Line retval{ _(option.opt.label), _(option.opt.tooltip) };
+    Option tmp(option);
+    tmp.opt.label = std::string("");
+    retval.append_option(tmp);
+    return retval;
+}
+
+void OptionsGroup::on_change_OG(const t_config_option_key& opt_id, const boost::any& value) {
+	if (m_on_change != nullptr)
+		m_on_change(opt_id, value);
+}
+
+Option ConfigOptionsGroup::get_option(const std::string& opt_key, int opt_index /*= -1*/)
+{
+	if (!m_config->has(opt_key)) {
+		std::cerr << "No " << opt_key << " in ConfigOptionsGroup config.\n";
+	}
+
+	std::string opt_id = opt_index == -1 ? opt_key : opt_key + "#" + std::to_string(opt_index);
+	std::pair<std::string, int> pair(opt_key, opt_index);
+	m_opt_map.emplace(opt_id, pair);
+
+	return Option(*m_config->def()->get(opt_key), opt_id);
+}
+
+void ConfigOptionsGroup::on_change_OG(const t_config_option_key& opt_id, const boost::any& value)
+{
+	if (!m_opt_map.empty())
+	{
+		auto it = m_opt_map.find(opt_id);
+		if (it == m_opt_map.end())
+		{
+			OptionsGroup::on_change_OG(opt_id, value);
+			return;
+		}		
+
+		auto itOption = it->second;
+		std::string opt_key = itOption.first;
+		int opt_index = itOption.second;
+
+		auto option = m_options.at(opt_id).opt;
+
+		// get value
+//!		auto field_value = get_value(opt_id);
+		if (option.gui_flags.compare("serialized")==0) {
+			if (opt_index != -1){
+				// 		die "Can't set serialized option indexed value" ;
+			}
+			change_opt_value(*m_config, opt_key, value);
+		}
+		else {
+			if (opt_index == -1) {
+				// change_opt_value(*m_config, opt_key, field_value);
+				//!? why field_value?? in this case changed value will be lose! No?
+				change_opt_value(*m_config, opt_key, value);
+			}
+			else {
+				change_opt_value(*m_config, opt_key, value, opt_index);
+// 				auto value = m_config->get($opt_key);
+// 				$value->[$opt_index] = $field_value;
+// 				$self->config->set($opt_key, $value);
+			}
+		}
+	}
+
+	OptionsGroup::on_change_OG(opt_id, value); //!? Why doing this
+}
+
+void ConfigOptionsGroup::back_to_initial_value(const std::string& opt_key)
+{
+	if (m_get_initial_config == nullptr)
+		return;
+	back_to_config_value(m_get_initial_config(), opt_key);
+}
+
+void ConfigOptionsGroup::back_to_sys_value(const std::string& opt_key)
+{
+	if (m_get_sys_config == nullptr)
+		return;
+	if (!have_sys_config())
+		return;
+	back_to_config_value(m_get_sys_config(), opt_key);
+}
+
+void ConfigOptionsGroup::back_to_config_value(const DynamicPrintConfig& config, const std::string& opt_key)
+{
+	boost::any value;
+	if (opt_key == "extruders_count"){
+		auto   *nozzle_diameter = dynamic_cast<const ConfigOptionFloats*>(config.option("nozzle_diameter"));
+		value = int(nozzle_diameter->values.size());
+	}
+	else if (m_opt_map.find(opt_key) != m_opt_map.end())
+	{
+		auto opt_id = m_opt_map.find(opt_key)->first;
+		std::string opt_short_key = m_opt_map.at(opt_id).first;
+		int opt_index = m_opt_map.at(opt_id).second;
+		value = get_config_value(config, opt_short_key, opt_index);
+	}
+	else{
+		value = get_config_value(config, opt_key);
+		change_opt_value(*m_config, opt_key, value);
+		return;
+	}
+
+	set_value(opt_key, value);
+	on_change_OG(opt_key, get_value(opt_key));
+}
+
+void ConfigOptionsGroup::reload_config(){
+	for (t_opt_map::iterator it = m_opt_map.begin(); it != m_opt_map.end(); ++it) {
+		auto opt_id = it->first;
+		std::string opt_key = m_opt_map.at(opt_id).first;
+		int opt_index = m_opt_map.at(opt_id).second;
+		auto option = m_options.at(opt_id).opt;
+		set_value(opt_id, config_value(opt_key, opt_index, option.gui_flags.compare("serialized") == 0 ));
+	}
+
+}
+
+boost::any ConfigOptionsGroup::config_value(const std::string& opt_key, int opt_index, bool deserialize){
+
+	if (deserialize) {
+		// Want to edit a vector value(currently only multi - strings) in a single edit box.
+		// Aggregate the strings the old way.
+		// Currently used for the post_process config value only.
+		if (opt_index != -1)
+			throw std::out_of_range("Can't deserialize option indexed value");
+// 		return join(';', m_config->get(opt_key)});
+		return get_config_value(*m_config, opt_key);
+	}
+	else {
+//		return opt_index == -1 ? m_config->get(opt_key) : m_config->get_at(opt_key, opt_index);
+		return get_config_value(*m_config, opt_key, opt_index);
+	}
+}
+
+boost::any ConfigOptionsGroup::get_config_value(const DynamicPrintConfig& config, const std::string& opt_key, int opt_index /*= -1*/)
+{
+	size_t idx = opt_index == -1 ? 0 : opt_index;
+	
+	boost::any ret;
+	wxString text_value = wxString("");
+	const ConfigOptionDef* opt = config.def()->get(opt_key);
+	switch (opt->type){
+	case coFloatOrPercent:{
+		const auto &value = *config.option<ConfigOptionFloatOrPercent>(opt_key);
+		if (value.percent)
+		{
+			text_value = wxString::Format(_T("%i"), int(value.value));
+			text_value += "%";
+		}
+		else
+			text_value = double_to_string(value.value);
+		ret = text_value;
+		break;
+	}
+	case coPercent:{
+		double val = config.option<ConfigOptionPercent>(opt_key)->value;
+		text_value = wxString::Format(_T("%i"), int(val));
+		ret = text_value;// += "%";
+	}
+		break;
+	case coPercents:
+	case coFloats:
+	case coFloat:{
+		double val = opt->type == coFloats ?
+					config.opt_float(opt_key, idx) :
+						opt->type == coFloat ? config.opt_float(opt_key) :
+						config.option<ConfigOptionPercents>(opt_key)->get_at(idx);
+		ret = double_to_string(val);
+		}
+		break;
+	case coString:
+		ret = static_cast<wxString>(config.opt_string(opt_key));
+		break;
+	case coStrings:
+		if (opt_key.compare("compatible_printers") == 0){
+			ret = config.option<ConfigOptionStrings>(opt_key)->values;
+			break;
+		}
+		if (config.option<ConfigOptionStrings>(opt_key)->values.empty())
+			ret = text_value;
+		else if (opt->gui_flags.compare("serialized") == 0){
+			std::vector<std::string> values = config.option<ConfigOptionStrings>(opt_key)->values;
+			if (!values.empty() && values[0].compare("") != 0)
+				for (auto el : values)
+					text_value += el + ";";
+			ret = text_value;
+		}
+		else
+			ret = static_cast<wxString>(config.opt_string(opt_key, static_cast<unsigned int>(idx)));
+		break;
+	case coBool:
+		ret = config.opt_bool(opt_key);
+		break;
+	case coBools:
+		ret = config.opt_bool(opt_key, idx);
+		break;
+	case coInt:
+		ret = config.opt_int(opt_key);
+		break;
+	case coInts:
+		ret = config.opt_int(opt_key, idx);
+		break;
+	case coEnum:{
+		if (opt_key.compare("external_fill_pattern") == 0 ||
+			opt_key.compare("fill_pattern") == 0 ){
+			ret = static_cast<int>(config.option<ConfigOptionEnum<InfillPattern>>(opt_key)->value);
+		}
+		else if (opt_key.compare("gcode_flavor") == 0 ){
+			ret = static_cast<int>(config.option<ConfigOptionEnum<GCodeFlavor>>(opt_key)->value);
+		}
+		else if (opt_key.compare("support_material_pattern") == 0){
+			ret = static_cast<int>(config.option<ConfigOptionEnum<SupportMaterialPattern>>(opt_key)->value);
+		}
+		else if (opt_key.compare("seam_position") == 0){
+			ret = static_cast<int>(config.option<ConfigOptionEnum<SeamPosition>>(opt_key)->value);
+		}
+		else if (opt_key.compare("host_type") == 0){
+			ret = static_cast<int>(config.option<ConfigOptionEnum<PrintHostType>>(opt_key)->value);
+		}
+	}
+		break;
+	case coPoints:
+		if (opt_key.compare("bed_shape") == 0)
+			ret = config.option<ConfigOptionPoints>(opt_key)->values;
+		else
+			ret = config.option<ConfigOptionPoints>(opt_key)->get_at(idx);
+		break;
+	case coNone:
+	default:
+		break;
+	}
+	return ret;
+}
+
+Field* ConfigOptionsGroup::get_fieldc(const t_config_option_key& opt_key, int opt_index){
+	Field* field = get_field(opt_key);
+	if (field != nullptr)
+		return field;
+	std::string opt_id = "";
+	for (t_opt_map::iterator it = m_opt_map.begin(); it != m_opt_map.end(); ++it) {
+		if (opt_key == m_opt_map.at(it->first).first && opt_index == m_opt_map.at(it->first).second){
+			opt_id = it->first;
+			break;
+		}
+	}
+	return opt_id.empty() ? nullptr : get_field(opt_id);
+}
+
+void ogStaticText::SetText(const wxString& value, bool wrap/* = true*/)
+{
+	SetLabel(value);
+	if (wrap) Wrap(400);
+	GetParent()->Layout();
+}
+
+} // GUI
+} // Slic3r

src/slic3r/GUI/OptionsGroup.hpp

@@ -0,0 +1,271 @@
+#ifndef slic3r_OptionsGroup_hpp_
+#define slic3r_OptionsGroup_hpp_
+
+#include <wx/wx.h>
+#include <wx/stattext.h>
+#include <wx/settings.h>
+//#include <wx/window.h>
+
+#include <map>
+#include <functional>
+
+#include "libslic3r/Config.hpp"
+#include "libslic3r/PrintConfig.hpp"
+#include "libslic3r/libslic3r.h"
+
+#include "Field.hpp"
+
+// Translate the ifdef 
+#ifdef __WXOSX__
+    #define wxOSX true
+#else
+    #define wxOSX false
+#endif
+
+#define BORDER(a, b) ((wxOSX ? a : b))
+
+namespace Slic3r { namespace GUI {
+
+enum ogDrawFlag{
+	ogDEFAULT,
+	ogSIDE_OPTIONS_VERTICAL
+};
+
+/// Widget type describes a function object that returns a wxWindow (our widget) and accepts a wxWidget (parent window).
+using widget_t = std::function<wxSizer*(wxWindow*)>;//!std::function<wxWindow*(wxWindow*)>;
+
+//auto default_label_clr = wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT); //GetSystemColour
+//auto modified_label_clr = *new wxColour(254, 189, 101);
+
+/// Wraps a ConfigOptionDef and adds function object for creating a side_widget.
+struct Option {
+	ConfigOptionDef			opt { ConfigOptionDef() };
+	t_config_option_key		opt_id;//! {""};
+    widget_t				side_widget {nullptr};
+    bool					readonly {false};
+
+	Option(const ConfigOptionDef& _opt, t_config_option_key id) :
+		opt(_opt), opt_id(id) {}
+};
+using t_option = std::unique_ptr<Option>;	//!
+
+/// Represents option lines
+class Line {
+public:
+    wxString	label {wxString("")};
+    wxString	label_tooltip {wxString("")};
+    size_t		full_width {0}; 
+    wxSizer*	sizer {nullptr};
+    widget_t	widget {nullptr};
+    std::function<wxWindow*(wxWindow*)>	near_label_widget{ nullptr };
+
+    void append_option(const Option& option) {
+        m_options.push_back(option);
+    }
+	void append_widget(const widget_t widget) {
+		m_extra_widgets.push_back(widget);
+    }
+	Line(wxString label, wxString tooltip) :
+		label(label), label_tooltip(tooltip) {}
+
+    const std::vector<widget_t>&	get_extra_widgets() const {return m_extra_widgets;}
+    const std::vector<Option>&		get_options() const { return m_options; }
+
+private:
+	std::vector<Option>		m_options;//! {std::vector<Option>()};
+    std::vector<widget_t>	m_extra_widgets;//! {std::vector<widget_t>()};
+};
+
+using column_t = std::function<wxWindow*(wxWindow* parent, const Line&)>;//std::function<wxSizer*(const Line&)>;
+
+using t_optionfield_map = std::map<t_config_option_key, t_field>;
+using t_opt_map = std::map< std::string, std::pair<std::string, int> >;
+
+class OptionsGroup {
+	wxStaticBox*	stb;
+public:
+    const bool		staticbox {true};
+    const wxString	title {wxString("")};
+    size_t			label_width {200};
+    wxSizer*		sizer {nullptr};
+    column_t		extra_column {nullptr};
+    t_change		m_on_change {nullptr};
+	std::function<DynamicPrintConfig()>	m_get_initial_config{ nullptr };
+	std::function<DynamicPrintConfig()>	m_get_sys_config{ nullptr };
+	std::function<bool()>	have_sys_config{ nullptr };
+
+    wxFont			sidetext_font {wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT) };
+    wxFont			label_font {wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT) };
+	int				sidetext_width{ -1 };
+
+    /// Returns a copy of the pointer of the parent wxWindow.
+    /// Accessor function is because users are not allowed to change the parent
+    /// but defining it as const means a lot of const_casts to deal with wx functions.
+    inline wxWindow* parent() const { 
+#ifdef __WXGTK__
+		return m_panel;
+#else
+		return m_parent;
+#endif /* __WXGTK__ */
+    }
+#ifdef __WXGTK__
+    wxWindow* get_parent() const {
+        return m_parent;
+    }
+#endif /* __WXGTK__ */
+
+	void		append_line(const Line& line, wxStaticText** colored_Label = nullptr);
+    Line		create_single_option_line(const Option& option) const;
+    void		append_single_option_line(const Option& option) { append_line(create_single_option_line(option)); }
+
+    // return a non-owning pointer reference 
+    inline Field*	get_field(const t_config_option_key& id) const{
+							if (m_fields.find(id) == m_fields.end()) return nullptr;
+							return m_fields.at(id).get();
+    }
+	bool			set_value(const t_config_option_key& id, const boost::any& value, bool change_event = false) {
+							if (m_fields.find(id) == m_fields.end()) return false;
+							m_fields.at(id)->set_value(value, change_event);
+							return true;
+    }
+	boost::any		get_value(const t_config_option_key& id) {
+							boost::any out; 
+    						if (m_fields.find(id) == m_fields.end()) ;
+							else 
+								out = m_fields.at(id)->get_value();
+							return out;
+    }
+
+	bool			set_side_text(const t_config_option_key& opt_key, const wxString& side_text) {
+							if (m_fields.find(opt_key) == m_fields.end()) return false;
+							auto st = m_fields.at(opt_key)->m_side_text;
+							if (!st) return false;
+							st->SetLabel(side_text);
+							return true;
+    }
+
+	void			set_name(const wxString& new_name) {
+							stb->SetLabel(new_name);
+    }
+
+	inline void		enable() { for (auto& field : m_fields) field.second->enable(); }
+    inline void		disable() { for (auto& field : m_fields) field.second->disable(); }
+	void			set_flag(ogDrawFlag flag) { m_flag = flag; }
+	void			set_grid_vgap(int gap) { m_grid_sizer->SetVGap(gap); }
+
+	void set_show_modified_btns_val(bool show) {
+		m_show_modified_btns = show;
+    }
+
+	OptionsGroup(	wxWindow* _parent, const wxString& title, bool is_tab_opt = false, 
+					ogDrawFlag flag = ogDEFAULT, column_t extra_clmn = nullptr) :
+					m_parent(_parent), title(title), m_show_modified_btns(is_tab_opt),
+					staticbox(title!=""), m_flag(flag), extra_column(extra_clmn){
+        if (staticbox) {
+            stb = new wxStaticBox(_parent, wxID_ANY, title);
+            stb->SetFont(bold_font());
+        }
+        sizer = (staticbox ? new wxStaticBoxSizer(stb, wxVERTICAL) : new wxBoxSizer(wxVERTICAL));
+        auto num_columns = 1U;
+        if (label_width != 0) num_columns++;
+        if (extra_column != nullptr) num_columns++;
+        m_grid_sizer = new wxFlexGridSizer(0, num_columns, 1,0);
+        static_cast<wxFlexGridSizer*>(m_grid_sizer)->SetFlexibleDirection(wxBOTH/*wxHORIZONTAL*/);
+        static_cast<wxFlexGridSizer*>(m_grid_sizer)->AddGrowableCol(label_width != 0);
+#ifdef __WXGTK__
+        m_panel = new wxPanel( _parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL );
+        sizer->Fit(m_panel);
+        sizer->Add(m_panel, 0, wxEXPAND | wxALL, wxOSX||!staticbox ? 0: 5);
+#else
+        sizer->Add(m_grid_sizer, 0, wxEXPAND | wxALL, wxOSX||!staticbox ? 0: 5);
+#endif /* __WXGTK__ */
+    }
+
+    wxGridSizer*        get_grid_sizer(){ return m_grid_sizer; }
+
+protected:
+	std::map<t_config_option_key, Option>	m_options;
+    wxWindow*				m_parent {nullptr};
+
+    /// Field list, contains unique_ptrs of the derived type.
+    /// using types that need to know what it is beyond the public interface 
+    /// need to cast based on the related ConfigOptionDef.
+    t_optionfield_map		m_fields;
+    bool					m_disabled {false};
+    wxGridSizer*			m_grid_sizer {nullptr};
+	// "true" if option is created in preset tabs
+	bool					m_show_modified_btns{ false };
+
+	ogDrawFlag				m_flag{ ogDEFAULT };
+
+	// This panel is needed for correct showing of the ToolTips for Button, StaticText and CheckBox
+	// Tooltips on GTK doesn't work inside wxStaticBoxSizer unless you insert a panel 
+	// inside it before you insert the other controls.
+#ifdef __WXGTK__
+	wxPanel*				m_panel {nullptr};
+#endif /* __WXGTK__ */
+
+    /// Generate a wxSizer or wxWindow from a configuration option
+    /// Precondition: opt resolves to a known ConfigOption
+    /// Postcondition: fields contains a wx gui object.
+	const t_field&		build_field(const t_config_option_key& id, const ConfigOptionDef& opt, wxStaticText* label = nullptr);
+	const t_field&		build_field(const t_config_option_key& id, wxStaticText* label = nullptr);
+	const t_field&		build_field(const Option& opt, wxStaticText* label = nullptr);
+	void				add_undo_buttuns_to_sizer(wxSizer* sizer, const t_field& field);
+
+    virtual void		on_kill_focus (){};
+	virtual void		on_change_OG(const t_config_option_key& opt_id, const boost::any& value);
+	virtual void		back_to_initial_value(const std::string& opt_key){}
+	virtual void		back_to_sys_value(const std::string& opt_key){}
+};
+
+class ConfigOptionsGroup: public OptionsGroup {
+public:
+	ConfigOptionsGroup(	wxWindow* parent, const wxString& title, DynamicPrintConfig* _config = nullptr, 
+						bool is_tab_opt = false, ogDrawFlag flag = ogDEFAULT, column_t extra_clmn = nullptr) :
+		OptionsGroup(parent, title, is_tab_opt, flag, extra_clmn), m_config(_config) {}
+
+    /// reference to libslic3r config, non-owning pointer (?).
+    DynamicPrintConfig*		m_config {nullptr};
+    bool					m_full_labels {0};
+	t_opt_map				m_opt_map;
+
+	Option		get_option(const std::string& opt_key, int opt_index = -1);
+	Line		create_single_option_line(const std::string& title, int idx = -1) /*const*/{
+		Option option = get_option(title, idx);
+		return OptionsGroup::create_single_option_line(option);
+	}
+	void		append_single_option_line(const Option& option)	{
+		OptionsGroup::append_single_option_line(option);
+	}
+	void		append_single_option_line(const std::string title, int idx = -1)
+	{
+		Option option = get_option(title, idx);
+		append_single_option_line(option);		
+	}
+
+	void		on_change_OG(const t_config_option_key& opt_id, const boost::any& value) override;
+	void		back_to_initial_value(const std::string& opt_key) override;
+	void		back_to_sys_value(const std::string& opt_key) override;
+	void		back_to_config_value(const DynamicPrintConfig& config, const std::string& opt_key);
+	void		on_kill_focus() override{ reload_config();}
+	void		reload_config();
+	boost::any	config_value(const std::string& opt_key, int opt_index, bool deserialize);
+	// return option value from config 
+	boost::any	get_config_value(const DynamicPrintConfig& config, const std::string& opt_key, int opt_index = -1);
+	Field*		get_fieldc(const t_config_option_key& opt_key, int opt_index);
+};
+
+//  Static text shown among the options.
+class ogStaticText :public wxStaticText{
+public:
+	ogStaticText() {}
+	ogStaticText(wxWindow* parent, const char *text) : wxStaticText(parent, wxID_ANY, text, wxDefaultPosition, wxDefaultSize){}
+	~ogStaticText(){}
+
+	void		SetText(const wxString& value, bool wrap = true);
+};
+
+}}
+
+#endif /* slic3r_OptionsGroup_hpp_ */

src/slic3r/GUI/Preferences.cpp

@@ -0,0 +1,134 @@
+#include "Preferences.hpp"
+#include "AppConfig.hpp"
+#include "OptionsGroup.hpp"
+
+namespace Slic3r {
+namespace GUI {
+
+PreferencesDialog::PreferencesDialog(wxWindow* parent, int event_preferences) : 
+	wxDialog(parent, wxID_ANY, _(L("Preferences")), wxDefaultPosition, wxDefaultSize), 
+	m_event_preferences(event_preferences) {
+		build();
+	}
+
+void PreferencesDialog::build()
+{
+	auto app_config = get_app_config();
+	m_optgroup = std::make_shared<ConfigOptionsGroup>(this, _(L("General")));
+	m_optgroup->label_width = 400;
+	m_optgroup->m_on_change = [this](t_config_option_key opt_key, boost::any value){
+		m_values[opt_key] = boost::any_cast<bool>(value) ? "1" : "0";
+	};
+
+	// TODO
+//    $optgroup->append_single_option_line(Slic3r::GUI::OptionsGroup::Option->new(
+//        opt_id = > 'version_check',
+//        type = > 'bool',
+//        label = > 'Check for updates',
+//        tooltip = > 'If this is enabled, Slic3r will check for updates daily and display a reminder if a newer version is available.',
+//        default = > $app_config->get("version_check") // 1,
+//        readonly = > !wxTheApp->have_version_check,
+//    ));
+
+	ConfigOptionDef def;
+	def.label = L("Remember output directory");
+	def.type = coBool;
+	def.tooltip = L("If this is enabled, Slic3r will prompt the last output directory "
+					  "instead of the one containing the input files.");
+    def.default_value = new ConfigOptionBool{ app_config->has("remember_output_path") ? app_config->get("remember_output_path")[0] == '1' : true }; // 1;
+    Option option(def, "remember_output_path");
+	m_optgroup->append_single_option_line(option);
+
+	def.label = L("Auto-center parts");
+	def.type = coBool;
+	def.tooltip = L("If this is enabled, Slic3r will auto-center objects "
+					  "around the print bed center.");
+	def.default_value = new ConfigOptionBool{ app_config->get("autocenter")[0] == '1' }; // 1;
+	option = Option (def,"autocenter");
+	m_optgroup->append_single_option_line(option);
+
+	def.label = L("Background processing");
+	def.type = coBool;
+	def.tooltip = L("If this is enabled, Slic3r will pre-process objects as soon "
+					  "as they\'re loaded in order to save time when exporting G-code.");
+	def.default_value = new ConfigOptionBool{ app_config->get("background_processing")[0] == '1' }; // 1;
+	option = Option (def,"background_processing");
+	m_optgroup->append_single_option_line(option);
+
+	// Please keep in sync with ConfigWizard
+	def.label = L("Check for application updates");
+	def.type = coBool;
+	def.tooltip = L("If enabled, Slic3r checks for new versions of Slic3r PE online. When a new version becomes available a notification is displayed at the next application startup (never during program usage). This is only a notification mechanisms, no automatic installation is done.");
+	def.default_value = new ConfigOptionBool(app_config->get("version_check") == "1");
+	option = Option (def, "version_check");
+	m_optgroup->append_single_option_line(option);
+
+	// Please keep in sync with ConfigWizard
+	def.label = L("Update built-in Presets automatically");
+	def.type = coBool;
+	def.tooltip = L("If enabled, Slic3r downloads updates of built-in system presets in the background. These updates are downloaded into a separate temporary location. When a new preset version becomes available it is offered at application startup.");
+	def.default_value = new ConfigOptionBool(app_config->get("preset_update") == "1");
+	option = Option (def, "preset_update");
+	m_optgroup->append_single_option_line(option);
+
+	def.label = L("Suppress \" - default - \" presets");
+	def.type = coBool;
+	def.tooltip = L("Suppress \" - default - \" presets in the Print / Filament / Printer "
+					  "selections once there are any other valid presets available.");
+	def.default_value = new ConfigOptionBool{ app_config->get("no_defaults")[0] == '1' }; // 1;
+	option = Option (def,"no_defaults");
+	m_optgroup->append_single_option_line(option);
+
+	def.label = L("Show incompatible print and filament presets");
+	def.type = coBool;
+	def.tooltip = L("When checked, the print and filament presets are shown in the preset editor "
+					  "even if they are marked as incompatible with the active printer");
+	def.default_value = new ConfigOptionBool{ app_config->get("show_incompatible_presets")[0] == '1' }; // 1;
+	option = Option (def,"show_incompatible_presets");
+	m_optgroup->append_single_option_line(option);
+
+	def.label = L("Use legacy OpenGL 1.1 rendering");
+	def.type = coBool;
+	def.tooltip = L("If you have rendering issues caused by a buggy OpenGL 2.0 driver, "
+					  "you may try to check this checkbox. This will disable the layer height "
+					  "editing and anti aliasing, so it is likely better to upgrade your graphics driver.");
+	def.default_value = new ConfigOptionBool{ app_config->get("use_legacy_opengl")[0] == '1' }; // 1;
+	option = Option (def,"use_legacy_opengl");
+	m_optgroup->append_single_option_line(option);
+
+	auto sizer = new wxBoxSizer(wxVERTICAL);
+	sizer->Add(m_optgroup->sizer, 0, wxEXPAND | wxBOTTOM | wxLEFT | wxRIGHT, 10);
+
+	auto buttons = CreateStdDialogButtonSizer(wxOK | wxCANCEL);
+	wxButton* btn = static_cast<wxButton*>(FindWindowById(wxID_OK, this));
+	btn->Bind(wxEVT_BUTTON, [this](wxCommandEvent&) { accept(); });
+	sizer->Add(buttons, 0, wxALIGN_CENTER_HORIZONTAL | wxBOTTOM, 10);
+
+	SetSizer(sizer);
+	sizer->SetSizeHints(this);
+}
+
+void PreferencesDialog::accept()
+{
+	if (m_values.find("no_defaults")      != m_values.end()||
+		m_values.find("use_legacy_opengl")!= m_values.end()) {
+		warning_catcher(this, _(L("You need to restart Slic3r to make the changes effective.")));
+	}
+
+	auto app_config = get_app_config();
+	for (std::map<std::string, std::string>::iterator it = m_values.begin(); it != m_values.end(); ++it) {
+		app_config->set(it->first, it->second);
+	}
+
+	EndModal(wxID_OK);
+	Close();  // needed on Linux
+
+	// Nothify the UI to update itself from the ini file.
+	if (m_event_preferences > 0) {
+		wxCommandEvent event(m_event_preferences);
+		get_app()->ProcessEvent(event);
+	}
+}
+
+} // GUI
+} // Slic3r

src/slic3r/GUI/Preferences.hpp

@@ -0,0 +1,31 @@
+#ifndef slic3r_Preferences_hpp_
+#define slic3r_Preferences_hpp_
+
+#include "GUI.hpp"
+
+#include <wx/dialog.h>
+#include <map>
+
+namespace Slic3r {
+namespace GUI {
+
+class ConfigOptionsGroup;
+
+class PreferencesDialog : public wxDialog
+{
+	std::map<std::string, std::string>	m_values;
+	std::shared_ptr<ConfigOptionsGroup>	m_optgroup;
+	int		m_event_preferences;
+public:
+	PreferencesDialog(wxWindow* parent, int event_preferences);
+	~PreferencesDialog(){ }
+
+	void	build();
+	void	accept();
+};
+
+} // GUI
+} // Slic3r
+
+
+#endif /* slic3r_Preferences_hpp_ */

src/slic3r/GUI/Preset.hpp

@@ -0,0 +1,444 @@
+#ifndef slic3r_Preset_hpp_
+#define slic3r_Preset_hpp_
+
+#include <deque>
+
+#include <boost/filesystem/path.hpp>
+#include <boost/property_tree/ptree_fwd.hpp>
+
+#include "../../libslic3r/libslic3r.h"
+#include "../../libslic3r/PrintConfig.hpp"
+#include "slic3r/Utils/Semver.hpp"
+
+class wxBitmap;
+class wxChoice;
+class wxBitmapComboBox;
+class wxItemContainer;
+
+namespace Slic3r {
+
+class AppConfig;
+class PresetBundle;
+
+namespace GUI {
+	class BitmapCache;
+}
+
+enum ConfigFileType
+{
+    CONFIG_FILE_TYPE_UNKNOWN,
+    CONFIG_FILE_TYPE_APP_CONFIG,
+    CONFIG_FILE_TYPE_CONFIG,
+    CONFIG_FILE_TYPE_CONFIG_BUNDLE,
+};
+
+extern ConfigFileType guess_config_file_type(const boost::property_tree::ptree &tree);
+
+class VendorProfile
+{
+public:
+    std::string                     name;
+    std::string                     id;
+    Semver                          config_version;
+    std::string                     config_update_url;
+
+    struct PrinterVariant {
+        PrinterVariant() {}
+        PrinterVariant(const std::string &name) : name(name) {}
+        std::string                 name;
+    };
+
+    struct PrinterModel {
+        PrinterModel() {}
+        std::string                 id;
+        std::string                 name;
+        PrinterTechnology           technology;
+        std::vector<PrinterVariant> variants;
+        PrinterVariant*       variant(const std::string &name) {
+            for (auto &v : this->variants)
+                if (v.name == name)
+                    return &v;
+            return nullptr;
+        }
+        const PrinterVariant* variant(const std::string &name) const { return const_cast<PrinterModel*>(this)->variant(name); }
+    };
+    std::vector<PrinterModel>          models;
+
+    VendorProfile() {}
+    VendorProfile(std::string id) : id(std::move(id)) {}
+
+    static VendorProfile from_ini(const boost::filesystem::path &path, bool load_all=true);
+    static VendorProfile from_ini(const boost::property_tree::ptree &tree, const boost::filesystem::path &path, bool load_all=true);
+
+    size_t      num_variants() const { size_t n = 0; for (auto &model : models) n += model.variants.size(); return n; }
+
+    bool        operator< (const VendorProfile &rhs) const { return this->id <  rhs.id; }
+    bool        operator==(const VendorProfile &rhs) const { return this->id == rhs.id; }
+};
+
+class Preset
+{
+public:
+    enum Type
+    {
+        TYPE_INVALID,
+        TYPE_PRINT,
+        TYPE_FILAMENT,
+        TYPE_SLA_MATERIAL,
+        TYPE_PRINTER,
+    };
+
+    Preset(Type type, const std::string &name, bool is_default = false) : type(type), is_default(is_default), name(name) {}
+
+    Type                type        = TYPE_INVALID;
+
+    // The preset represents a "default" set of properties,
+    // pulled from the default values of the PrintConfig (see PrintConfigDef for their definitions).
+    bool                is_default;
+    // External preset points to a configuration, which has been loaded but not imported
+    // into the Slic3r default configuration location.
+    bool                is_external = false;
+    // System preset is read-only.
+    bool                is_system   = false;
+    // Preset is visible, if it is associated with a printer model / variant that is enabled in the AppConfig
+    // or if it has no printer model / variant association.
+    // Also the "default" preset is only visible, if it is the only preset in the list.
+    bool                is_visible  = true;
+    // Has this preset been modified?
+    bool                is_dirty    = false;
+    // Is this preset compatible with the currently active printer?
+    bool                is_compatible = true;
+
+    // Name of the preset, usually derived form the file name.
+    std::string         name;
+    // File name of the preset. This could be a Print / Filament / Printer preset, 
+    // or a Configuration file bundling the Print + Filament + Printer presets (in that case is_external and possibly is_system will be true),
+    // or it could be a G-code (again, is_external will be true).
+    std::string         file;
+    // If this is a system profile, then there should be a vendor data available to display at the UI.
+    const VendorProfile *vendor      = nullptr;
+
+    // Has this profile been loaded?
+    bool                loaded      = false;
+
+    // Configuration data, loaded from a file, or set from the defaults.
+    DynamicPrintConfig  config;
+
+    // Load this profile for the following keys only.
+    DynamicPrintConfig& load(const std::vector<std::string> &keys, const StaticPrintConfig &defaults);
+
+    void                save();
+
+    // Return a label of this preset, consisting of a name and a "(modified)" suffix, if this preset is dirty.
+    std::string         label() const;
+
+    // Set the is_dirty flag if the provided config is different from the active one.
+    void                set_dirty(const DynamicPrintConfig &config) { this->is_dirty = ! this->config.diff(config).empty(); }
+    void                set_dirty(bool dirty = true) { this->is_dirty = dirty; }
+    void                reset_dirty() { this->is_dirty = false; }
+
+    bool                is_compatible_with_printer(const Preset &active_printer, const DynamicPrintConfig *extra_config) const;
+    bool                is_compatible_with_printer(const Preset &active_printer) const;
+
+    // Returns the name of the preset, from which this preset inherits.
+    static std::string& inherits(DynamicPrintConfig &cfg) { return cfg.option<ConfigOptionString>("inherits", true)->value; }
+    std::string&        inherits() { return Preset::inherits(this->config); }
+    const std::string&  inherits() const { return Preset::inherits(const_cast<Preset*>(this)->config); }
+
+    // Returns the "compatible_printers_condition".
+    static std::string& compatible_printers_condition(DynamicPrintConfig &cfg) { return cfg.option<ConfigOptionString>("compatible_printers_condition", true)->value; }
+    std::string&        compatible_printers_condition() { return Preset::compatible_printers_condition(this->config); }
+    const std::string&  compatible_printers_condition() const { return Preset::compatible_printers_condition(const_cast<Preset*>(this)->config); }
+
+    static PrinterTechnology& printer_technology(DynamicPrintConfig &cfg) { return cfg.option<ConfigOptionEnum<PrinterTechnology>>("printer_technology", true)->value; }
+    PrinterTechnology&        printer_technology() { return Preset::printer_technology(this->config); }
+    const PrinterTechnology&  printer_technology() const { return Preset::printer_technology(const_cast<Preset*>(this)->config); }
+
+    // Mark this preset as compatible if it is compatible with active_printer.
+    bool                update_compatible_with_printer(const Preset &active_printer, const DynamicPrintConfig *extra_config);
+
+    // Set is_visible according to application config
+    void                set_visible_from_appconfig(const AppConfig &app_config);
+
+    // Resize the extruder specific fields, initialize them with the content of the 1st extruder.
+    void                set_num_extruders(unsigned int n) { set_num_extruders(this->config, n); }
+
+    // Sort lexicographically by a preset name. The preset name shall be unique across a single PresetCollection.
+    bool                operator<(const Preset &other) const { return this->name < other.name; }
+
+    static const std::vector<std::string>&  print_options();
+    static const std::vector<std::string>&  filament_options();
+    // Printer options contain the nozzle options.
+    static const std::vector<std::string>&  printer_options();
+    // Nozzle options of the printer options.
+    static const std::vector<std::string>&  nozzle_options();
+
+    static const std::vector<std::string>&  sla_printer_options();
+    static const std::vector<std::string>&  sla_material_options();
+
+	static void update_suffix_modified();
+
+protected:
+    friend class        PresetCollection;
+    friend class        PresetBundle;
+    static void         normalize(DynamicPrintConfig &config);
+    // Resize the extruder specific vectors ()
+    static void         set_num_extruders(DynamicPrintConfig &config, unsigned int n);
+    static const std::string& suffix_modified();
+    static std::string  remove_suffix_modified(const std::string &name);
+};
+
+// Collections of presets of the same type (one of the Print, Filament or Printer type).
+class PresetCollection
+{
+public:
+    // Initialize the PresetCollection with the "- default -" preset.
+    PresetCollection(Preset::Type type, const std::vector<std::string> &keys, const Slic3r::StaticPrintConfig &defaults, const std::string &default_name = "- default -");
+    ~PresetCollection();
+
+    typedef std::deque<Preset>::iterator Iterator;
+    typedef std::deque<Preset>::const_iterator ConstIterator;
+    Iterator        begin() { return m_presets.begin() + m_num_default_presets; }
+    ConstIterator   begin() const { return m_presets.begin() + m_num_default_presets; }
+    Iterator        end() { return m_presets.end(); }
+    ConstIterator   end() const { return m_presets.end(); }
+
+    void            reset(bool delete_files);
+
+    Preset::Type    type() const { return m_type; }
+    std::string     name() const;
+    const std::deque<Preset>& operator()() const { return m_presets; }
+
+    // Add default preset at the start of the collection, increment the m_default_preset counter.
+    void            add_default_preset(const std::vector<std::string> &keys, const Slic3r::StaticPrintConfig &defaults, const std::string &preset_name);
+
+    // Load ini files of the particular type from the provided directory path.
+    void            load_presets(const std::string &dir_path, const std::string &subdir);
+
+    // Load a preset from an already parsed config file, insert it into the sorted sequence of presets
+    // and select it, losing previous modifications.
+    Preset&         load_preset(const std::string &path, const std::string &name, const DynamicPrintConfig &config, bool select = true);
+    Preset&         load_preset(const std::string &path, const std::string &name, DynamicPrintConfig &&config, bool select = true);
+
+    Preset&         load_external_preset(
+        // Path to the profile source file (a G-code, an AMF or 3MF file, a config file)
+        const std::string           &path,
+        // Name of the profile, derived from the source file name.
+        const std::string           &name,
+        // Original name of the profile, extracted from the loaded config. Empty, if the name has not been stored.
+        const std::string           &original_name,
+        // Config to initialize the preset from.
+        const DynamicPrintConfig    &config,
+        // Select the preset after loading?
+        bool                         select = true);
+
+    // Save the preset under a new name. If the name is different from the old one,
+    // a new preset is stored into the list of presets.
+    // All presets are marked as not modified and the new preset is activated.
+    void            save_current_preset(const std::string &new_name);
+
+    // Delete the current preset, activate the first visible preset.
+    void            delete_current_preset();
+
+    // Load default bitmap to be placed at the wxBitmapComboBox of a MainFrame.
+    bool            load_bitmap_default(const std::string &file_name);
+
+    // Compatible & incompatible marks, to be placed at the wxBitmapComboBox items.
+    void            set_bitmap_compatible  (const wxBitmap *bmp) { m_bitmap_compatible   = bmp; }
+    void            set_bitmap_incompatible(const wxBitmap *bmp) { m_bitmap_incompatible = bmp; }
+    void            set_bitmap_lock        (const wxBitmap *bmp) { m_bitmap_lock         = bmp; }
+    void            set_bitmap_lock_open   (const wxBitmap *bmp) { m_bitmap_lock_open    = bmp; }
+
+    // Enable / disable the "- default -" preset.
+    void            set_default_suppressed(bool default_suppressed);
+    bool            is_default_suppressed() const { return m_default_suppressed; }
+
+    // Select a preset. If an invalid index is provided, the first visible preset is selected.
+    Preset&         select_preset(size_t idx);
+    // Return the selected preset, without the user modifications applied.
+    Preset&         get_selected_preset()       { return m_presets[m_idx_selected]; }
+    const Preset&   get_selected_preset() const { return m_presets[m_idx_selected]; }
+    int             get_selected_idx()    const { return m_idx_selected; }
+    // Returns the name of the selected preset, or an empty string if no preset is selected.
+    std::string     get_selected_preset_name() const { return (m_idx_selected == -1) ? std::string() : this->get_selected_preset().name; }
+    // For the current edited preset, return the parent preset if there is one.
+    // If there is no parent preset, nullptr is returned.
+    // The parent preset may be a system preset or a user preset, which will be
+    // reflected by the UI.
+    const Preset*   get_selected_preset_parent() const;
+	// get parent preset for some child preset
+	const Preset*	get_preset_parent(const Preset& child) const;
+	// Return the selected preset including the user modifications.
+    Preset&         get_edited_preset()         { return m_edited_preset; }
+    const Preset&   get_edited_preset() const   { return m_edited_preset; }
+
+	// used to update preset_choice from Tab
+	const std::deque<Preset>&	get_presets()	{ return m_presets; }
+	int						get_idx_selected()	{ return m_idx_selected; }
+	static const std::string&	get_suffix_modified();
+
+    // Return a preset possibly with modifications.
+	Preset&			default_preset()			{ return m_presets.front(); }
+    const Preset&   default_preset() const      { return m_presets.front(); }
+    // Return a preset by an index. If the preset is active, a temporary copy is returned.
+    Preset&         preset(size_t idx)          { return (int(idx) == m_idx_selected) ? m_edited_preset : m_presets[idx]; }
+    const Preset&   preset(size_t idx) const    { return const_cast<PresetCollection*>(this)->preset(idx); }
+    void            discard_current_changes()   { m_presets[m_idx_selected].reset_dirty(); m_edited_preset = m_presets[m_idx_selected]; }
+    
+    // Return a preset by its name. If the preset is active, a temporary copy is returned.
+    // If a preset is not found by its name, null is returned.
+    Preset*         find_preset(const std::string &name, bool first_visible_if_not_found = false);
+    const Preset*   find_preset(const std::string &name, bool first_visible_if_not_found = false) const 
+        { return const_cast<PresetCollection*>(this)->find_preset(name, first_visible_if_not_found); }
+
+    size_t          first_visible_idx() const;
+    // Return index of the first compatible preset. Certainly at least the '- default -' preset shall be compatible.
+    // If one of the prefered_alternates is compatible, select it.
+    template<typename PreferedCondition>
+    size_t          first_compatible_idx(PreferedCondition prefered_condition) const
+    {
+        size_t i = m_default_suppressed ? m_num_default_presets : 0;
+        size_t n = this->m_presets.size();
+        size_t i_compatible = n;
+        for (; i < n; ++ i)
+            if (m_presets[i].is_compatible) {
+                if (prefered_condition(m_presets[i].name))
+                    return i;
+                if (i_compatible == n)
+                    // Store the first compatible profile into i_compatible.
+                    i_compatible = i;
+            }
+        return (i_compatible == n) ? 0 : i_compatible;
+    }
+    // Return index of the first compatible preset. Certainly at least the '- default -' preset shall be compatible.
+    size_t          first_compatible_idx() const { return this->first_compatible_idx([](const std::string&){return true;}); }
+
+    // Return index of the first visible preset. Certainly at least the '- default -' preset shall be visible.
+    // Return the first visible preset. Certainly at least the '- default -' preset shall be visible.
+    Preset&         first_visible()             { return this->preset(this->first_visible_idx()); }
+    const Preset&   first_visible() const       { return this->preset(this->first_visible_idx()); }
+    Preset&         first_compatible()          { return this->preset(this->first_compatible_idx()); }
+    template<typename PreferedCondition>
+    Preset&         first_compatible(PreferedCondition prefered_condition) { return this->preset(this->first_compatible_idx(prefered_condition)); }
+    const Preset&   first_compatible() const    { return this->preset(this->first_compatible_idx()); }
+
+    // Return number of presets including the "- default -" preset.
+    size_t          size() const                { return m_presets.size(); }
+    bool            has_defaults_only() const   { return m_presets.size() <= m_num_default_presets; }
+
+    // For Print / Filament presets, disable those, which are not compatible with the printer.
+    template<typename PreferedCondition>
+    void            update_compatible_with_printer(const Preset &active_printer, bool select_other_if_incompatible, PreferedCondition prefered_condition)
+    {
+        if (this->update_compatible_with_printer_internal(active_printer, select_other_if_incompatible) == (size_t)-1)
+            // Find some other compatible preset, or the "-- default --" preset.
+            this->select_preset(this->first_compatible_idx(prefered_condition));        
+    }
+    void            update_compatible_with_printer(const Preset &active_printer, bool select_other_if_incompatible)
+        { this->update_compatible_with_printer(active_printer, select_other_if_incompatible, [](const std::string&){return true;}); }
+
+    size_t          num_visible() const { return std::count_if(m_presets.begin(), m_presets.end(), [](const Preset &preset){return preset.is_visible;}); }
+
+    // Compare the content of get_selected_preset() with get_edited_preset() configs, return true if they differ.
+    bool                        current_is_dirty() const { return ! this->current_dirty_options().empty(); }
+    // Compare the content of get_selected_preset() with get_edited_preset() configs, return the list of keys where they differ.
+    std::vector<std::string>    current_dirty_options(const bool deep_compare = false) const
+        { return dirty_options(&this->get_edited_preset(), &this->get_selected_preset(), deep_compare); }
+    // Compare the content of get_selected_preset() with get_edited_preset() configs, return the list of keys where they differ.
+    std::vector<std::string>    current_different_from_parent_options(const bool deep_compare = false) const
+        { return dirty_options(&this->get_edited_preset(), this->get_selected_preset_parent(), deep_compare); }
+
+    // Update the choice UI from the list of presets.
+    // If show_incompatible, all presets are shown, otherwise only the compatible presets are shown.
+    // If an incompatible preset is selected, it is shown as well.
+    size_t          update_tab_ui(wxBitmapComboBox *ui, bool show_incompatible);
+    // Update the choice UI from the list of presets.
+    // Only the compatible presets are shown.
+    // If an incompatible preset is selected, it is shown as well.
+    void            update_platter_ui(wxBitmapComboBox *ui);
+
+    // Update a dirty floag of the current preset, update the labels of the UI component accordingly.
+    // Return true if the dirty flag changed.
+    bool            update_dirty_ui(wxBitmapComboBox *ui);
+    
+    // Select a profile by its name. Return true if the selection changed.
+    // Without force, the selection is only updated if the index changes.
+    // With force, the changes are reverted if the new index is the same as the old index.
+    bool            select_preset_by_name(const std::string &name, bool force);
+
+    // Generate a file path from a profile name. Add the ".ini" suffix if it is missing.
+    std::string     path_from_name(const std::string &new_name) const;
+
+protected:
+    // Select a preset, if it exists. If it does not exist, select an invalid (-1) index.
+    // This is a temporary state, which shall be fixed immediately by the following step.
+    bool            select_preset_by_name_strict(const std::string &name);
+
+    // Merge one vendor's presets with the other vendor's presets, report duplicates.
+    std::vector<std::string> merge_presets(PresetCollection &&other, const std::set<VendorProfile> &new_vendors);
+
+private:
+    PresetCollection();
+    PresetCollection(const PresetCollection &other);
+    PresetCollection& operator=(const PresetCollection &other);
+
+    // Find a preset position in the sorted list of presets.
+    // The "-- default -- " preset is always the first, so it needs
+    // to be handled differently.
+    // If a preset does not exist, an iterator is returned indicating where to insert a preset with the same name.
+    std::deque<Preset>::iterator find_preset_internal(const std::string &name)
+    {
+        Preset key(m_type, name);
+        auto it = std::lower_bound(m_presets.begin() + m_num_default_presets, m_presets.end(), key);
+        if (it == m_presets.end() || it->name != name) {
+            // Preset has not been not found in the sorted list of non-default presets. Try the defaults.
+            for (size_t i = 0; i < m_num_default_presets; ++ i)
+                if (m_presets[i].name == name) {
+                    it = m_presets.begin() + i;
+                    break;
+                }
+        }
+        return it;
+    }
+    std::deque<Preset>::const_iterator find_preset_internal(const std::string &name) const
+        { return const_cast<PresetCollection*>(this)->find_preset_internal(name); }
+
+    size_t update_compatible_with_printer_internal(const Preset &active_printer, bool unselect_if_incompatible);
+
+    static std::vector<std::string> dirty_options(const Preset *edited, const Preset *reference, const bool is_printer_type = false);
+
+    // Type of this PresetCollection: TYPE_PRINT, TYPE_FILAMENT or TYPE_PRINTER.
+    Preset::Type            m_type;
+    // List of presets, starting with the "- default -" preset.
+    // Use deque to force the container to allocate an object per each entry, 
+    // so that the addresses of the presets don't change during resizing of the container.
+    std::deque<Preset>      m_presets;
+    // Initially this preset contains a copy of the selected preset. Later on, this copy may be modified by the user.
+    Preset                  m_edited_preset;
+    // Selected preset.
+    int                     m_idx_selected;
+    // Is the "- default -" preset suppressed?
+    bool                    m_default_suppressed  = true;
+    size_t                  m_num_default_presets = 0;
+    // Compatible & incompatible marks, to be placed at the wxBitmapComboBox items of a Platter.
+    // These bitmaps are not owned by PresetCollection, but by a PresetBundle.
+    const wxBitmap         *m_bitmap_compatible   = nullptr;
+    const wxBitmap         *m_bitmap_incompatible = nullptr;
+    const wxBitmap         *m_bitmap_lock         = nullptr;
+    const wxBitmap         *m_bitmap_lock_open    = nullptr;
+    // Marks placed at the wxBitmapComboBox of a MainFrame.
+    // These bitmaps are owned by PresetCollection.
+    wxBitmap               *m_bitmap_main_frame;
+    // Path to the directory to store the config files into.
+    std::string             m_dir_path;
+
+	// Caching color bitmaps for the filament combo box.
+	GUI::BitmapCache       *m_bitmap_cache = nullptr;
+
+    // to access select_preset_by_name_strict()
+    friend class PresetBundle;
+};
+
+} // namespace Slic3r
+
+#endif /* slic3r_Preset_hpp_ */

src/slic3r/GUI/PresetBundle.hpp

@@ -0,0 +1,168 @@
+#ifndef slic3r_PresetBundle_hpp_
+#define slic3r_PresetBundle_hpp_
+
+#include "AppConfig.hpp"
+#include "Preset.hpp"
+
+#include <set>
+#include <boost/filesystem/path.hpp>
+
+namespace Slic3r {
+
+namespace GUI {
+    class BitmapCache;
+};
+
+class PlaceholderParser;
+
+// Bundle of Print + Filament + Printer presets.
+class PresetBundle
+{
+public:
+    PresetBundle();
+    ~PresetBundle();
+
+    // Remove all the presets but the "-- default --".
+    // Optionally remove all the files referenced by the presets from the user profile directory.
+    void            reset(bool delete_files);
+
+    void            setup_directories();
+
+    // Load ini files of all types (print, filament, printer) from Slic3r::data_dir() / presets.
+    // Load selections (current print, current filaments, current printer) from config.ini
+    // This is done just once on application start up.
+    void            load_presets(const AppConfig &config);
+
+    // Export selections (current print, current filaments, current printer) into config.ini
+    void            export_selections(AppConfig &config);
+    // Export selections (current print, current filaments, current printer) into a placeholder parser.
+    void            export_selections(PlaceholderParser &pp);
+
+    PresetCollection            prints;
+    PresetCollection            filaments;
+    PresetCollection            sla_materials;
+    PresetCollection            printers;
+    // Filament preset names for a multi-extruder or multi-material print.
+    // extruders.size() should be the same as printers.get_edited_preset().config.nozzle_diameter.size()
+    std::vector<std::string>    filament_presets;
+
+    // The project configuration values are kept separated from the print/filament/printer preset,
+    // they are being serialized / deserialized from / to the .amf, .3mf, .config, .gcode, 
+    // and they are being used by slicing core.
+    DynamicPrintConfig          project_config;
+
+    // There will be an entry for each system profile loaded, 
+    // and the system profiles will point to the VendorProfile instances owned by PresetBundle::vendors.
+    std::set<VendorProfile>     vendors;
+
+    struct ObsoletePresets {
+        std::vector<std::string> prints;
+        std::vector<std::string> filaments;
+        std::vector<std::string> sla_materials;
+        std::vector<std::string> printers;
+    };
+    ObsoletePresets             obsolete_presets;
+
+    bool                        has_defauls_only() const 
+        { return prints.has_defaults_only() && filaments.has_defaults_only() && printers.has_defaults_only(); }
+
+    DynamicPrintConfig          full_config() const;
+
+    // Load user configuration and store it into the user profiles.
+    // This method is called by the configuration wizard.
+    void                        load_config(const std::string &name, DynamicPrintConfig config)
+        { this->load_config_file_config(name, false, std::move(config)); }
+
+    // Load an external config file containing the print, filament and printer presets.
+    // Instead of a config file, a G-code may be loaded containing the full set of parameters.
+    // In the future the configuration will likely be read from an AMF file as well.
+    // If the file is loaded successfully, its print / filament / printer profiles will be activated.
+    void                        load_config_file(const std::string &path);
+
+    // Load an external config source containing the print, filament and printer presets.
+    // The given string must contain the full set of parameters (same as those exported to gcode).
+    // If the string is parsed successfully, its print / filament / printer profiles will be activated.
+    void                        load_config_string(const char* str, const char* source_filename = nullptr);
+
+    // Load a config bundle file, into presets and store the loaded presets into separate files
+    // of the local configuration directory.
+    // Load settings into the provided settings instance.
+    // Activate the presets stored in the config bundle.
+    // Returns the number of presets loaded successfully.
+    enum { 
+        // Save the profiles, which have been loaded.
+        LOAD_CFGBNDLE_SAVE = 1, 
+        // Delete all old config profiles before loading.
+        LOAD_CFGBNDLE_RESET_USER_PROFILE = 2,
+        // Load a system config bundle.
+        LOAD_CFGBNDLE_SYSTEM = 4,
+        LOAD_CFGBUNDLE_VENDOR_ONLY = 8,
+    };
+    // Load the config bundle, store it to the user profile directory by default.
+    size_t                      load_configbundle(const std::string &path, unsigned int flags = LOAD_CFGBNDLE_SAVE);
+
+    // Export a config bundle file containing all the presets and the names of the active presets.
+    void                        export_configbundle(const std::string &path); // , const DynamicPrintConfig &settings);
+
+    // Update a filament selection combo box on the platter for an idx_extruder.
+    void                        update_platter_filament_ui(unsigned int idx_extruder, wxBitmapComboBox *ui);
+
+    // Enable / disable the "- default -" preset.
+    void                        set_default_suppressed(bool default_suppressed);
+
+    // Set the filament preset name. As the name could come from the UI selection box, 
+    // an optional "(modified)" suffix will be removed from the filament name.
+    void                        set_filament_preset(size_t idx, const std::string &name);
+
+    // Read out the number of extruders from an active printer preset,
+    // update size and content of filament_presets.
+    void                        update_multi_material_filament_presets();
+
+    // Update the is_compatible flag of all print and filament presets depending on whether they are marked
+    // as compatible with the currently selected printer.
+    // Also updates the is_visible flag of each preset.
+    // If select_other_if_incompatible is true, then the print or filament preset is switched to some compatible
+    // preset if the current print or filament preset is not compatible.
+    void                        update_compatible_with_printer(bool select_other_if_incompatible);
+
+    static bool                 parse_color(const std::string &scolor, unsigned char *rgb_out);
+
+private:
+    std::string                 load_system_presets();
+    // Merge one vendor's presets with the other vendor's presets, report duplicates.
+    std::vector<std::string>    merge_presets(PresetBundle &&other);
+
+    // Set the "enabled" flag for printer vendors, printer models and printer variants
+    // based on the user configuration.
+    // If the "vendor" section is missing, enable all models and variants of the particular vendor.
+    void                        load_installed_printers(const AppConfig &config);
+
+    // Load selections (current print, current filaments, current printer) from config.ini
+    // This is done just once on application start up.
+    void                        load_selections(const AppConfig &config);
+
+    // Load print, filament & printer presets from a config. If it is an external config, then the name is extracted from the external path.
+    // and the external config is just referenced, not stored into user profile directory.
+    // If it is not an external config, then the config will be stored into the user profile directory.
+    void                        load_config_file_config(const std::string &name_or_path, bool is_external, DynamicPrintConfig &&config);
+    void                        load_config_file_config_bundle(const std::string &path, const boost::property_tree::ptree &tree);
+    bool                        load_compatible_bitmaps();
+
+    DynamicPrintConfig          full_fff_config() const;
+    DynamicPrintConfig          full_sla_config() const;
+
+    // Indicator, that the preset is compatible with the selected printer.
+    wxBitmap                            *m_bitmapCompatible;
+    // Indicator, that the preset is NOT compatible with the selected printer.
+    wxBitmap                            *m_bitmapIncompatible;
+    // Indicator, that the preset is system and not modified.
+    wxBitmap                            *m_bitmapLock;
+    // Indicator, that the preset is system and user modified.
+    wxBitmap                            *m_bitmapLockOpen;
+    // Caching color bitmaps for the filament combo box.
+    GUI::BitmapCache                    *m_bitmapCache;
+};
+
+} // namespace Slic3r
+
+#endif /* slic3r_PresetBundle_hpp_ */

src/slic3r/GUI/PresetHints.cpp

@@ -0,0 +1,278 @@
+//#undef NDEBUG
+#include <cassert>
+
+#include "PresetBundle.hpp"
+#include "PresetHints.hpp"
+#include "Flow.hpp"
+
+#include <boost/algorithm/string/predicate.hpp>
+#include <wx/intl.h> 
+
+#include "../../libslic3r/libslic3r.h"
+#include "GUI.hpp"
+
+namespace Slic3r {
+
+#define MIN_BUF_LENGTH	4096
+std::string PresetHints::cooling_description(const Preset &preset)
+{
+	std::string out;
+	char buf[MIN_BUF_LENGTH/*4096*/];
+	if (preset.config.opt_bool("cooling", 0)) {
+		int 	slowdown_below_layer_time 	= preset.config.opt_int("slowdown_below_layer_time", 0);
+		int 	min_fan_speed 				= preset.config.opt_int("min_fan_speed", 0);
+		int 	max_fan_speed 				= preset.config.opt_int("max_fan_speed", 0);
+		int 	min_print_speed				= int(preset.config.opt_float("min_print_speed", 0) + 0.5);
+		int 	fan_below_layer_time		= preset.config.opt_int("fan_below_layer_time", 0);
+		sprintf(buf, _CHB(L("If estimated layer time is below ~%ds, fan will run at %d%% and print speed will be reduced so that no less than %ds are spent on that layer (however, speed will never be reduced below %dmm/s).")),
+            slowdown_below_layer_time, max_fan_speed, slowdown_below_layer_time, min_print_speed);
+		out += buf;
+        if (fan_below_layer_time > slowdown_below_layer_time) {
+			sprintf(buf, _CHB(L("\nIf estimated layer time is greater, but still below ~%ds, fan will run at a proportionally decreasing speed between %d%% and %d%%.")),
+                fan_below_layer_time, max_fan_speed, min_fan_speed);
+            out += buf;
+        }
+		out += _CHB(L("\nDuring the other layers, fan "));
+    } else {
+        out = _CHB(L("Fan "));
+    }
+	if (preset.config.opt_bool("fan_always_on", 0)) {
+		int 	disable_fan_first_layers 	= preset.config.opt_int("disable_fan_first_layers", 0);
+		int 	min_fan_speed 				= preset.config.opt_int("min_fan_speed", 0);
+        sprintf(buf, _CHB(L("will always run at %d%% ")), min_fan_speed);
+        out += buf;
+        if (disable_fan_first_layers > 1) {
+        	sprintf(buf, _CHB(L("except for the first %d layers")), disable_fan_first_layers);
+	        out += buf;
+        }
+        else if (disable_fan_first_layers == 1)
+        	out += _CHB(L("except for the first layer"));
+    } else
+    	out += _CHB(L("will be turned off."));
+
+    return out;
+}
+
+static const ConfigOptionFloatOrPercent& first_positive(const ConfigOptionFloatOrPercent *v1, const ConfigOptionFloatOrPercent &v2, const ConfigOptionFloatOrPercent &v3)
+{
+    return (v1 != nullptr && v1->value > 0) ? *v1 : ((v2.value > 0) ? v2 : v3);
+}
+
+std::string PresetHints::maximum_volumetric_flow_description(const PresetBundle &preset_bundle)
+{
+    // Find out, to which nozzle index is the current filament profile assigned.
+    int idx_extruder  = 0;
+	int num_extruders = (int)preset_bundle.filament_presets.size();
+    for (; idx_extruder < num_extruders; ++ idx_extruder)
+        if (preset_bundle.filament_presets[idx_extruder] == preset_bundle.filaments.get_selected_preset().name)
+            break;
+    if (idx_extruder == num_extruders)
+        // The current filament preset is not active for any extruder.
+        idx_extruder = -1;
+
+    const DynamicPrintConfig &print_config    = preset_bundle.prints   .get_edited_preset().config;
+    const DynamicPrintConfig &filament_config = preset_bundle.filaments.get_edited_preset().config;
+    const DynamicPrintConfig &printer_config  = preset_bundle.printers .get_edited_preset().config;
+
+    // Current printer values.
+    float  nozzle_diameter                  = (float)printer_config.opt_float("nozzle_diameter", idx_extruder);
+
+    // Print config values
+    double layer_height                     = print_config.opt_float("layer_height");
+    double first_layer_height               = print_config.get_abs_value("first_layer_height", layer_height);
+    double support_material_speed           = print_config.opt_float("support_material_speed");
+    double support_material_interface_speed = print_config.get_abs_value("support_material_interface_speed", support_material_speed);
+    double bridge_speed                     = print_config.opt_float("bridge_speed");
+    double bridge_flow_ratio                = print_config.opt_float("bridge_flow_ratio");
+    double perimeter_speed                  = print_config.opt_float("perimeter_speed");
+    double external_perimeter_speed         = print_config.get_abs_value("external_perimeter_speed", perimeter_speed);
+    double gap_fill_speed                   = print_config.opt_float("gap_fill_speed");
+    double infill_speed                     = print_config.opt_float("infill_speed");
+    double small_perimeter_speed            = print_config.get_abs_value("small_perimeter_speed", perimeter_speed);
+    double solid_infill_speed               = print_config.get_abs_value("solid_infill_speed", infill_speed);
+    double top_solid_infill_speed           = print_config.get_abs_value("top_solid_infill_speed", solid_infill_speed);
+    // Maximum print speed when auto-speed is enabled by setting any of the above speed values to zero.
+    double max_print_speed                  = print_config.opt_float("max_print_speed");
+    // Maximum volumetric speed allowed for the print profile.
+    double max_volumetric_speed             = print_config.opt_float("max_volumetric_speed");
+
+    const auto &extrusion_width                     = *print_config.option<ConfigOptionFloatOrPercent>("extrusion_width");
+    const auto &external_perimeter_extrusion_width  = *print_config.option<ConfigOptionFloatOrPercent>("external_perimeter_extrusion_width");
+    const auto &first_layer_extrusion_width         = *print_config.option<ConfigOptionFloatOrPercent>("first_layer_extrusion_width");
+    const auto &infill_extrusion_width              = *print_config.option<ConfigOptionFloatOrPercent>("infill_extrusion_width");
+    const auto &perimeter_extrusion_width           = *print_config.option<ConfigOptionFloatOrPercent>("perimeter_extrusion_width");
+    const auto &solid_infill_extrusion_width        = *print_config.option<ConfigOptionFloatOrPercent>("solid_infill_extrusion_width");
+    const auto &support_material_extrusion_width    = *print_config.option<ConfigOptionFloatOrPercent>("support_material_extrusion_width");
+    const auto &top_infill_extrusion_width          = *print_config.option<ConfigOptionFloatOrPercent>("top_infill_extrusion_width");
+    const auto &first_layer_speed                   = *print_config.option<ConfigOptionFloatOrPercent>("first_layer_speed");
+
+    // Index of an extruder assigned to a feature. If set to 0, an active extruder will be used for a multi-material print.
+    // If different from idx_extruder, it will not be taken into account for this hint.
+    auto feature_extruder_active = [idx_extruder, num_extruders](int i) {
+        return i <= 0 || i > num_extruders || idx_extruder == -1 || idx_extruder == i - 1;
+    };
+    bool perimeter_extruder_active                  = feature_extruder_active(print_config.opt_int("perimeter_extruder"));
+    bool infill_extruder_active                     = feature_extruder_active(print_config.opt_int("infill_extruder"));
+    bool solid_infill_extruder_active               = feature_extruder_active(print_config.opt_int("solid_infill_extruder"));
+    bool support_material_extruder_active           = feature_extruder_active(print_config.opt_int("support_material_extruder"));
+    bool support_material_interface_extruder_active = feature_extruder_active(print_config.opt_int("support_material_interface_extruder"));
+
+    // Current filament values
+    double filament_diameter                = filament_config.opt_float("filament_diameter", 0);
+    double filament_crossection             = M_PI * 0.25 * filament_diameter * filament_diameter;
+    double extrusion_multiplier             = filament_config.opt_float("extrusion_multiplier", 0);
+    // The following value will be annotated by this hint, so it does not take part in the calculation.
+//    double filament_max_volumetric_speed    = filament_config.opt_float("filament_max_volumetric_speed", 0);
+
+    std::string out;
+    for (size_t idx_type = (first_layer_extrusion_width.value == 0) ? 1 : 0; idx_type < 3; ++ idx_type) {
+        // First test the maximum volumetric extrusion speed for non-bridging extrusions.
+        bool first_layer = idx_type == 0;
+        bool bridging    = idx_type == 2;
+		const ConfigOptionFloatOrPercent *first_layer_extrusion_width_ptr = (first_layer && first_layer_extrusion_width.value > 0) ?
+			&first_layer_extrusion_width : nullptr;
+        const float                       lh  = float(first_layer ? first_layer_height : layer_height);
+        const float                       bfr = bridging ? bridge_flow_ratio : 0.f;
+        double                            max_flow = 0.;
+        std::string                       max_flow_extrusion_type;
+        auto                              limit_by_first_layer_speed = [&first_layer_speed, first_layer](double speed_normal, double speed_max) {
+            if (first_layer && first_layer_speed.value > 0)
+                // Apply the first layer limit.
+                speed_normal = first_layer_speed.get_abs_value(speed_normal);
+            return (speed_normal > 0.) ? speed_normal : speed_max;
+        };
+        if (perimeter_extruder_active) {
+            double external_perimeter_rate = Flow::new_from_config_width(frExternalPerimeter, 
+                first_positive(first_layer_extrusion_width_ptr, external_perimeter_extrusion_width, extrusion_width), 
+                nozzle_diameter, lh, bfr).mm3_per_mm() *
+                (bridging ? bridge_speed : 
+                    limit_by_first_layer_speed(std::max(external_perimeter_speed, small_perimeter_speed), max_print_speed));
+            if (max_flow < external_perimeter_rate) {
+                max_flow = external_perimeter_rate;
+                max_flow_extrusion_type = _CHB(L("external perimeters"));
+            }
+            double perimeter_rate = Flow::new_from_config_width(frPerimeter, 
+                first_positive(first_layer_extrusion_width_ptr, perimeter_extrusion_width, extrusion_width), 
+                nozzle_diameter, lh, bfr).mm3_per_mm() *
+                (bridging ? bridge_speed :
+                    limit_by_first_layer_speed(std::max(perimeter_speed, small_perimeter_speed), max_print_speed));
+            if (max_flow < perimeter_rate) {
+                max_flow = perimeter_rate;
+                max_flow_extrusion_type = _CHB(L("perimeters"));
+            }
+        }
+        if (! bridging && infill_extruder_active) {
+            double infill_rate = Flow::new_from_config_width(frInfill, 
+                first_positive(first_layer_extrusion_width_ptr, infill_extrusion_width, extrusion_width), 
+                nozzle_diameter, lh, bfr).mm3_per_mm() * limit_by_first_layer_speed(infill_speed, max_print_speed);
+            if (max_flow < infill_rate) {
+                max_flow = infill_rate;
+                max_flow_extrusion_type = _CHB(L("infill"));
+            }
+        }
+        if (solid_infill_extruder_active) {
+            double solid_infill_rate = Flow::new_from_config_width(frInfill, 
+                first_positive(first_layer_extrusion_width_ptr, solid_infill_extrusion_width, extrusion_width), 
+                nozzle_diameter, lh, 0).mm3_per_mm() *
+                (bridging ? bridge_speed : limit_by_first_layer_speed(solid_infill_speed, max_print_speed));
+            if (max_flow < solid_infill_rate) {
+                max_flow = solid_infill_rate;
+                max_flow_extrusion_type = _CHB(L("solid infill"));
+            }
+            if (! bridging) {
+                double top_solid_infill_rate = Flow::new_from_config_width(frInfill, 
+                    first_positive(first_layer_extrusion_width_ptr, top_infill_extrusion_width, extrusion_width), 
+                    nozzle_diameter, lh, bfr).mm3_per_mm() * limit_by_first_layer_speed(top_solid_infill_speed, max_print_speed);
+                if (max_flow < top_solid_infill_rate) {
+                    max_flow = top_solid_infill_rate;
+                    max_flow_extrusion_type = _CHB(L("top solid infill"));
+                }
+            }
+        }
+        if (support_material_extruder_active) {
+            double support_material_rate = Flow::new_from_config_width(frSupportMaterial,
+                first_positive(first_layer_extrusion_width_ptr, support_material_extrusion_width, extrusion_width), 
+                nozzle_diameter, lh, bfr).mm3_per_mm() *
+                (bridging ? bridge_speed : limit_by_first_layer_speed(support_material_speed, max_print_speed));
+            if (max_flow < support_material_rate) {
+                max_flow = support_material_rate;
+                max_flow_extrusion_type = _CHB(L("support"));
+            }
+        }
+        if (support_material_interface_extruder_active) {
+            double support_material_interface_rate = Flow::new_from_config_width(frSupportMaterialInterface,
+                first_positive(first_layer_extrusion_width_ptr, support_material_extrusion_width, extrusion_width),
+                nozzle_diameter, lh, bfr).mm3_per_mm() *
+                (bridging ? bridge_speed : limit_by_first_layer_speed(support_material_interface_speed, max_print_speed));
+            if (max_flow < support_material_interface_rate) {
+                max_flow = support_material_interface_rate;
+                max_flow_extrusion_type = _CHB(L("support interface"));
+            }
+        }
+        //FIXME handle gap_fill_speed
+        if (! out.empty())
+            out += "\n";
+        out += (first_layer ? _CHB(L("First layer volumetric")) : (bridging ? _CHB(L("Bridging volumetric")) : _CHB(L("Volumetric"))));
+        out += _CHB(L(" flow rate is maximized "));
+        bool limited_by_max_volumetric_speed = max_volumetric_speed > 0 && max_volumetric_speed < max_flow;
+        out += (limited_by_max_volumetric_speed ? 
+            _CHB(L("by the print profile maximum")) : 
+            (_CHB(L("when printing ")) + max_flow_extrusion_type))
+            + _CHB(L(" with a volumetric rate "));
+        if (limited_by_max_volumetric_speed)
+            max_flow = max_volumetric_speed;
+		char buf[MIN_BUF_LENGTH/*2048*/];
+        sprintf(buf, _CHB(L("%3.2f mm³/s")), max_flow);
+        out += buf;
+        sprintf(buf, _CHB(L(" at filament speed %3.2f mm/s.")), max_flow / filament_crossection);
+        out += buf;
+    }
+
+ 	return out;
+}
+
+std::string PresetHints::recommended_thin_wall_thickness(const PresetBundle &preset_bundle)
+{
+    const DynamicPrintConfig &print_config    = preset_bundle.prints   .get_edited_preset().config;
+    const DynamicPrintConfig &printer_config  = preset_bundle.printers .get_edited_preset().config;
+
+    float   layer_height                        = float(print_config.opt_float("layer_height"));
+    int     num_perimeters                      = print_config.opt_int("perimeters");
+    bool    thin_walls                          = print_config.opt_bool("thin_walls");
+    float   nozzle_diameter                     = float(printer_config.opt_float("nozzle_diameter", 0));
+    
+    std::string out;
+	if (layer_height <= 0.f){
+		out += _CHB(L("Recommended object thin wall thickness: Not available due to invalid layer height."));
+		return out;
+	}
+
+    Flow    external_perimeter_flow             = Flow::new_from_config_width(
+        frExternalPerimeter, 
+        *print_config.opt<ConfigOptionFloatOrPercent>("external_perimeter_extrusion_width"), 
+        nozzle_diameter, layer_height, false);
+    Flow    perimeter_flow                      = Flow::new_from_config_width(
+        frPerimeter, 
+        *print_config.opt<ConfigOptionFloatOrPercent>("perimeter_extrusion_width"), 
+        nozzle_diameter, layer_height, false);
+
+    
+    if (num_perimeters > 0) {
+        int num_lines = std::min(num_perimeters * 2, 10);
+		char buf[MIN_BUF_LENGTH/*256*/];
+        sprintf(buf, _CHB(L("Recommended object thin wall thickness for layer height %.2f and ")), layer_height);
+        out += buf;
+        // Start with the width of two closely spaced 
+        double width = external_perimeter_flow.width + external_perimeter_flow.spacing();
+        for (int i = 2; i <= num_lines; thin_walls ? ++ i : i += 2) {
+            if (i > 2)
+                out += ", ";
+            sprintf(buf, _CHB(L("%d lines: %.2lf mm")), i, width);
+            out += buf;
+            width += perimeter_flow.spacing() * (thin_walls ? 1.f : 2.f);
+        }
+    }
+    return out;
+}
+
+}; // namespace Slic3r

src/slic3r/GUI/PresetHints.hpp

@@ -0,0 +1,30 @@
+#ifndef slic3r_PresetHints_hpp_
+#define slic3r_PresetHints_hpp_
+
+#include <string>
+
+#include "PresetBundle.hpp"
+
+namespace Slic3r {
+
+// GUI utility functions to produce hint messages from the current profile.
+class PresetHints
+{
+public:
+    // Produce a textual description of the cooling logic of a currently active filament.
+    static std::string cooling_description(const Preset &preset);
+    
+    // Produce a textual description of the maximum flow achived for the current configuration
+    // (the current printer, filament and print settigns).
+    // This description will be useful for getting a gut feeling for the maximum volumetric
+    // print speed achievable with the extruder.
+    static std::string maximum_volumetric_flow_description(const PresetBundle &preset_bundle);
+
+    // Produce a textual description of a recommended thin wall thickness
+    // from the provided number of perimeters and the external / internal perimeter width.
+    static std::string recommended_thin_wall_thickness(const PresetBundle &preset_bundle);
+};
+
+} // namespace Slic3r
+
+#endif /* slic3r_PresetHints_hpp_ */

src/slic3r/GUI/ProgressIndicator.hpp

@@ -0,0 +1,70 @@
+#ifndef IPROGRESSINDICATOR_HPP
+#define IPROGRESSINDICATOR_HPP
+
+#include <string>
+#include <functional>
+
+namespace Slic3r {
+
+/**
+ * @brief Generic progress indication interface.
+ */
+class ProgressIndicator {
+public:
+    using CancelFn = std::function<void(void)>; // Cancel function signature.
+
+private:
+    float state_ = .0f, max_ = 1.f, step_;
+    CancelFn cancelfunc_ = [](){};
+
+public:
+
+    inline virtual ~ProgressIndicator() {}
+
+    /// Get the maximum of the progress range.
+    float max() const { return max_; }
+
+    /// Get the current progress state
+    float state() const { return state_; }
+
+    /// Set the maximum of the progress range
+    virtual void max(float maxval) { max_ = maxval; }
+
+    /// Set the current state of the progress.
+    virtual void state(float val)  { state_ = val; }
+
+    /**
+     * @brief Number of states int the progress. Can be used instead of giving a
+     * maximum value.
+     */
+    virtual void states(unsigned statenum) {
+        step_ = max_ / statenum;
+    }
+
+    /// Message shown on the next status update.
+    virtual void message(const std::string&) = 0;
+
+    /// Title of the operation.
+    virtual void title(const std::string&) = 0;
+
+    /// Formatted message for the next status update. Works just like sprintf.
+    virtual void message_fmt(const std::string& fmt, ...);
+
+    /// Set up a cancel callback for the operation if feasible.
+    virtual void on_cancel(CancelFn func = CancelFn()) { cancelfunc_ = func; }
+
+    /**
+     * Explicitly shut down the progress indicator and call the associated
+     * callback.
+     */
+    virtual void cancel() { cancelfunc_(); }
+
+    /// Convenience function to call message and status update in one function.
+    void update(float st, const std::string& msg) {
+        message(msg); state(st);
+    }
+};
+
+}
+
+#endif // IPROGRESSINDICATOR_HPP

src/slic3r/GUI/ProgressStatusBar.cpp

@@ -0,0 +1,152 @@
+#include "ProgressStatusBar.hpp"
+
+#include <wx/timer.h>
+#include <wx/gauge.h>
+#include <wx/button.h>
+#include <wx/statusbr.h>
+#include <wx/frame.h>
+#include "GUI.hpp"
+
+#include <iostream>
+
+namespace Slic3r {
+
+ProgressStatusBar::ProgressStatusBar(wxWindow *parent, int id):
+    self(new wxStatusBar(parent ? parent : GUI::get_main_frame(),
+                         id == -1? wxID_ANY : id)),
+    timer_(new wxTimer(self)),
+    prog_ (new wxGauge(self,
+                       wxGA_HORIZONTAL,
+                       100,
+                       wxDefaultPosition,
+                       wxDefaultSize)),
+    cancelbutton_(new wxButton(self,
+                               -1,
+                               "Cancel",
+                               wxDefaultPosition,
+                               wxDefaultSize))
+{
+    prog_->Hide();
+    cancelbutton_->Hide();
+
+    self->SetFieldsCount(3);
+    int w[] = {-1, 150, 155};
+    self->SetStatusWidths(3, w);
+
+    self->Bind(wxEVT_TIMER, [this](const wxTimerEvent&) {
+        if (prog_->IsShown()) timer_->Stop();
+        if(is_busy()) prog_->Pulse();
+    });
+
+    self->Bind(wxEVT_SIZE, [this](wxSizeEvent& event){
+        wxRect rect;
+        self->GetFieldRect(1, rect);
+        auto offset = 0;
+        cancelbutton_->Move(rect.GetX() + offset, rect.GetY() + offset);
+        cancelbutton_->SetSize(rect.GetWidth() - offset, rect.GetHeight());
+
+        self->GetFieldRect(2, rect);
+        prog_->Move(rect.GetX() + offset, rect.GetY() + offset);
+        prog_->SetSize(rect.GetWidth() - offset, rect.GetHeight());
+
+        event.Skip();
+    });
+
+    cancelbutton_->Bind(wxEVT_BUTTON, [this](const wxCommandEvent&) {
+        if(cancel_cb_) cancel_cb_();
+        m_perl_cancel_callback.call();
+        cancelbutton_->Hide();
+    });
+}
+
+ProgressStatusBar::~ProgressStatusBar() {
+    if(timer_->IsRunning()) timer_->Stop();
+}
+
+int ProgressStatusBar::get_progress() const
+{
+    return prog_->GetValue();
+}
+
+void ProgressStatusBar::set_progress(int val)
+{
+    if(!prog_->IsShown()) show_progress(true);
+
+    if(val == prog_->GetRange()) {
+        prog_->SetValue(0);
+        show_progress(false);
+    } else {
+        prog_->SetValue(val);
+    }
+}
+
+int ProgressStatusBar::get_range() const
+{
+    return prog_->GetRange();
+}
+
+void ProgressStatusBar::set_range(int val)
+{
+    if(val != prog_->GetRange()) {
+        prog_->SetRange(val);
+    }
+}
+
+void ProgressStatusBar::show_progress(bool show)
+{
+    prog_->Show(show);
+    prog_->Pulse();
+}
+
+void ProgressStatusBar::start_busy(int rate)
+{
+    busy_ = true;
+    show_progress(true);
+    if (!timer_->IsRunning()) {
+        timer_->Start(rate);
+    }
+}
+
+void ProgressStatusBar::stop_busy()
+{
+    timer_->Stop();
+    show_progress(false);
+    prog_->SetValue(0);
+    busy_ = false;
+}
+
+void ProgressStatusBar::set_cancel_callback(ProgressStatusBar::CancelFn ccb) {
+    cancel_cb_ = ccb;
+    if(ccb) cancelbutton_->Show();
+    else cancelbutton_->Hide();
+}
+
+void ProgressStatusBar::run(int rate)
+{
+    if(!timer_->IsRunning()) {
+        timer_->Start(rate);
+    }
+}
+
+void ProgressStatusBar::embed(wxFrame *frame)
+{
+    wxFrame* mf = frame? frame : GUI::get_main_frame();
+    mf->SetStatusBar(self);
+}
+
+void ProgressStatusBar::set_status_text(const wxString& txt)
+{
+    self->SetStatusText(wxString::FromUTF8(txt.c_str()));
+}
+
+void ProgressStatusBar::show_cancel_button()
+{
+    cancelbutton_->Show();
+}
+
+void ProgressStatusBar::hide_cancel_button()
+{
+    cancelbutton_->Hide();
+}
+
+}

src/slic3r/GUI/ProgressStatusBar.hpp

@@ -0,0 +1,68 @@
+#ifndef PROGRESSSTATUSBAR_HPP
+#define PROGRESSSTATUSBAR_HPP
+
+#include <memory>
+#include <functional>
+
+#include "callback.hpp"
+
+class wxTimer;
+class wxGauge;
+class wxButton;
+class wxTimerEvent;
+class wxStatusBar;
+class wxWindow;
+class wxFrame;
+class wxString;
+
+namespace Slic3r {
+
+/**
+ * @brief The ProgressStatusBar class is the widgets occupying the lower area
+ * of the Slicer main window. It consists of a message area to the left and a
+ * progress indication area to the right with an optional cancel button.
+ */
+class ProgressStatusBar {
+    wxStatusBar *self;      // we cheat! It should be the base class but: perl!
+    wxTimer *timer_;
+    wxGauge *prog_;
+    wxButton *cancelbutton_;
+public:
+
+    /// Cancel callback function type
+    using CancelFn = std::function<void()>;
+
+    ProgressStatusBar(wxWindow *parent = nullptr, int id = -1);
+    ~ProgressStatusBar();
+
+    int  get_progress() const;
+    void set_progress(int);
+    int  get_range() const;
+    void set_range(int = 100);
+    void show_progress(bool);
+    void start_busy(int = 100);
+    void stop_busy();
+    inline bool is_busy() const { return busy_; }
+    void set_cancel_callback(CancelFn = CancelFn());
+    inline void remove_cancel_callback() { set_cancel_callback(); }
+    void run(int rate);
+    void embed(wxFrame *frame = nullptr);
+    void set_status_text(const wxString& txt);
+
+    // Temporary methods to satisfy Perl side
+    void show_cancel_button();
+    void hide_cancel_button();
+
+    PerlCallback m_perl_cancel_callback;
+private:
+    bool busy_ = false;
+    CancelFn cancel_cb_;
+};
+
+namespace GUI {
+    using Slic3r::ProgressStatusBar;
+}
+
+}
+
+#endif // PROGRESSSTATUSBAR_HPP

src/slic3r/GUI/RammingChart.cpp

@@ -0,0 +1,279 @@
+#include <algorithm>
+#include <wx/dcbuffer.h>
+
+#include "RammingChart.hpp"
+#include "GUI.hpp"
+
+
+wxDEFINE_EVENT(EVT_WIPE_TOWER_CHART_CHANGED, wxCommandEvent);
+
+
+void Chart::draw() {
+    wxAutoBufferedPaintDC dc(this); // unbuffered DC caused flickering on win
+
+    dc.SetBrush(GetBackgroundColour());
+    dc.SetPen(GetBackgroundColour());
+    dc.DrawRectangle(GetClientRect());  // otherwise the background would end up black on windows
+
+    dc.SetPen(*wxBLACK_PEN);
+    dc.SetBrush(*wxWHITE_BRUSH);
+    dc.DrawRectangle(m_rect);
+    
+    if (visible_area.m_width < 0.499) {
+        dc.DrawText(_(L("NO RAMMING AT ALL")),wxPoint(m_rect.GetLeft()+m_rect.GetWidth()/2-50,m_rect.GetBottom()-m_rect.GetHeight()/2));
+        return;
+    }
+    
+    
+    if (!m_line_to_draw.empty()) {
+        for (unsigned int i=0;i<m_line_to_draw.size()-2;++i) {
+            int color = 510*((m_rect.GetBottom()-(m_line_to_draw)[i])/double(m_rect.GetHeight()));
+            dc.SetPen( wxPen( wxColor(std::min(255,color),255-std::max(color-255,0),0), 1 ) );
+            dc.DrawLine(m_rect.GetLeft()+1+i,(m_line_to_draw)[i],m_rect.GetLeft()+1+i,m_rect.GetBottom());        
+        }
+        dc.SetPen( wxPen( wxColor(0,0,0), 1 ) );
+        for (unsigned int i=0;i<m_line_to_draw.size()-2;++i) {
+            if (splines)
+                dc.DrawLine(m_rect.GetLeft()+i,(m_line_to_draw)[i],m_rect.GetLeft()+i+1,(m_line_to_draw)[i+1]);
+            else {
+                dc.DrawLine(m_rect.GetLeft()+i,(m_line_to_draw)[i],m_rect.GetLeft()+i+1,(m_line_to_draw)[i]);
+                dc.DrawLine(m_rect.GetLeft()+i+1,(m_line_to_draw)[i],m_rect.GetLeft()+i+1,(m_line_to_draw)[i+1]);
+            }
+        }
+    }
+    
+    // draw draggable buttons
+    dc.SetBrush(*wxBLUE_BRUSH);
+    dc.SetPen( wxPen( wxColor(0,0,0), 1 ) );
+    for (auto& button : m_buttons)
+        //dc.DrawRectangle(math_to_screen(button.get_pos())-wxPoint(side/2.,side/2.), wxSize(side,side));
+        dc.DrawCircle(math_to_screen(button.get_pos()),side/2.);
+        //dc.DrawRectangle(math_to_screen(button.get_pos()-wxPoint2DDouble(0.125,0))-wxPoint(0,5),wxSize(50,10));
+
+    // draw x-axis:
+    float last_mark = -10000;
+    for (float math_x=int(visible_area.m_x*10)/10 ; math_x < (visible_area.m_x+visible_area.m_width) ; math_x+=0.1) {
+        int x = math_to_screen(wxPoint2DDouble(math_x,visible_area.m_y)).x;
+        int y = m_rect.GetBottom();
+        if (x-last_mark < 50) continue;
+        dc.DrawLine(x,y+3,x,y-3);
+        dc.DrawText(wxString().Format(wxT("%.1f"), math_x),wxPoint(x-10,y+7));
+        last_mark = x;
+    }
+    
+    // draw y-axis:
+    last_mark=10000;
+    for (int math_y=visible_area.m_y ; math_y < (visible_area.m_y+visible_area.m_height) ; math_y+=1) {
+        int y = math_to_screen(wxPoint2DDouble(visible_area.m_x,math_y)).y;
+        int x = m_rect.GetLeft();
+        if (last_mark-y < 50) continue;    
+        dc.DrawLine(x-3,y,x+3,y);
+        dc.DrawText(wxString()<<math_y,wxPoint(x-25,y-2/*7*/));
+        last_mark = y;
+    }
+    
+    // axis labels:
+    wxString label = _(L("Time")) + " ("+_(L("s"))+")";
+    int text_width = 0;
+    int text_height = 0;
+    dc.GetTextExtent(label,&text_width,&text_height);
+    dc.DrawText(label,wxPoint(0.5*(m_rect.GetRight()+m_rect.GetLeft())-text_width/2.f, m_rect.GetBottom()+25));
+    label = _(L("Volumetric speed")) + " (" + _(L("mm")) + wxString("³/", wxConvUTF8) + _(L("s")) + ")";
+    dc.GetTextExtent(label,&text_width,&text_height);
+    dc.DrawRotatedText(label,wxPoint(0,0.5*(m_rect.GetBottom()+m_rect.GetTop())+text_width/2.f),90);
+}
+
+void Chart::mouse_right_button_clicked(wxMouseEvent& event) {
+    if (!manual_points_manipulation)
+        return;
+    wxPoint point = event.GetPosition();
+    int button_index = which_button_is_clicked(point);
+    if (button_index != -1 && m_buttons.size()>2) {
+        m_buttons.erase(m_buttons.begin()+button_index);
+        recalculate_line();
+    }
+}
+    
+
+
+void Chart::mouse_clicked(wxMouseEvent& event) {
+    wxPoint point = event.GetPosition();
+    int button_index = which_button_is_clicked(point);
+    if ( button_index != -1) {
+        m_dragged = &m_buttons[button_index];
+        m_previous_mouse = point;            
+    }
+}
+    
+    
+    
+void Chart::mouse_moved(wxMouseEvent& event) {
+    if (!event.Dragging() || !m_dragged) return;
+    wxPoint pos = event.GetPosition();    
+    wxRect rect = m_rect;
+    rect.Deflate(side/2.);
+    if (!(rect.Contains(pos))) {  // the mouse left chart area
+        mouse_left_window(event);
+        return;
+    }    
+    int delta_x = pos.x - m_previous_mouse.x;
+    int delta_y = pos.y - m_previous_mouse.y;
+    m_dragged->move(fixed_x?0:double(delta_x)/m_rect.GetWidth() * visible_area.m_width,-double(delta_y)/m_rect.GetHeight() * visible_area.m_height); 
+    m_previous_mouse = pos;
+    recalculate_line();
+}
+
+
+
+void Chart::mouse_double_clicked(wxMouseEvent& event) {
+    if (!manual_points_manipulation)
+        return;
+    wxPoint point = event.GetPosition();
+    if (!m_rect.Contains(point))     // the click is outside the chart
+        return;
+    m_buttons.push_back(screen_to_math(point));
+    std::sort(m_buttons.begin(),m_buttons.end());
+    recalculate_line();
+    return;
+}
+
+
+
+
+void Chart::recalculate_line() {
+    std::vector<wxPoint> points;
+    for (auto& but : m_buttons) {
+        points.push_back(wxPoint(math_to_screen(but.get_pos())));
+        if (points.size()>1 && points.back().x==points[points.size()-2].x) points.pop_back();
+        if (points.size()>1 && points.back().x > m_rect.GetRight()) {
+            points.pop_back();
+            break;
+        }
+    }
+    std::sort(points.begin(),points.end(),[](wxPoint& a,wxPoint& b) { return a.x < b.x; });
+    
+    m_line_to_draw.clear();
+    m_total_volume = 0.f;
+   
+   
+    // Cubic spline interpolation: see https://en.wikiversity.org/wiki/Cubic_Spline_Interpolation#Methods
+    const bool boundary_first_derivative = true; // true - first derivative is 0 at the leftmost and rightmost point
+                                                 // false - second ---- || -------
+    const int N = points.size()-1; // last point can be accessed as N, we have N+1 total points
+    std::vector<float> diag(N+1);
+    std::vector<float> mu(N+1);
+    std::vector<float> lambda(N+1);
+    std::vector<float> h(N+1);
+    std::vector<float> rhs(N+1);
+    
+    // let's fill in inner equations
+    for (int i=1;i<=N;++i) h[i] = points[i].x-points[i-1].x;
+    std::fill(diag.begin(),diag.end(),2.f);
+    for (int i=1;i<=N-1;++i) {
+        mu[i] = h[i]/(h[i]+h[i+1]);
+        lambda[i] = 1.f - mu[i];
+        rhs[i] = 6 * ( float(points[i+1].y-points[i].y  )/(h[i+1]*(points[i+1].x-points[i-1].x)) -  
+                       float(points[i].y  -points[i-1].y)/(h[i]  *(points[i+1].x-points[i-1].x))   );                       
+    }
+    
+    // now fill in the first and last equations, according to boundary conditions:
+    if (boundary_first_derivative) {
+        const float endpoints_derivative = 0;
+        lambda[0] = 1;
+        mu[N]     = 1;
+        rhs[0] = (6.f/h[1]) * (float(points[0].y-points[1].y)/(points[0].x-points[1].x) - endpoints_derivative);
+        rhs[N] = (6.f/h[N]) * (endpoints_derivative - float(points[N-1].y-points[N].y)/(points[N-1].x-points[N].x));        
+    }
+    else {
+        lambda[0] = 0;
+        mu[N]     = 0;
+        rhs[0]    = 0;
+        rhs[N]    = 0;
+    }
+        
+    // the trilinear system is ready to be solved:
+    for (int i=1;i<=N;++i) {
+        float multiple = mu[i]/diag[i-1];    // let's subtract proper multiple of above equation
+        diag[i]-= multiple * lambda[i-1];
+        rhs[i] -= multiple * rhs[i-1];        
+    }
+    // now the back substitution (vector mu contains invalid values from now on):
+    rhs[N] = rhs[N]/diag[N];
+    for (int i=N-1;i>=0;--i)
+        rhs[i] = (rhs[i]-lambda[i]*rhs[i+1])/diag[i];
+    
+    
+    
+    
+    unsigned int i=1;
+    float y=0.f;
+    for (int x=m_rect.GetLeft(); x<=m_rect.GetRight() ; ++x) {        
+        if (splines) {
+            if (i<points.size()-1 && points[i].x < x ) {
+                ++i; 
+            }
+            if (points[0].x > x)
+                y = points[0].y;
+            else
+                if (points[N].x < x)
+                    y = points[N].y;
+                else 
+                    y = (rhs[i-1]*pow(points[i].x-x,3)+rhs[i]*pow(x-points[i-1].x,3)) / (6*h[i]) +
+                        (points[i-1].y-rhs[i-1]*h[i]*h[i]/6.f) * (points[i].x-x)/h[i] +
+                        (points[i].y  -rhs[i]  *h[i]*h[i]/6.f) * (x-points[i-1].x)/h[i];
+            m_line_to_draw.push_back(y);
+        }
+        else {            
+            float x_math = screen_to_math(wxPoint(x,0)).m_x;
+            if (i+2<=points.size() && m_buttons[i+1].get_pos().m_x-0.125 < x_math)
+                ++i;
+            m_line_to_draw.push_back(math_to_screen(wxPoint2DDouble(x_math,m_buttons[i].get_pos().m_y)).y);
+        }
+            
+                    
+        m_line_to_draw.back() = std::max(m_line_to_draw.back(), m_rect.GetTop()-1);
+        m_line_to_draw.back() = std::min(m_line_to_draw.back(), m_rect.GetBottom()-1);
+        m_total_volume += (m_rect.GetBottom() - m_line_to_draw.back()) * (visible_area.m_width / m_rect.GetWidth()) * (visible_area.m_height / m_rect.GetHeight());
+    }
+    
+    wxPostEvent(this->GetParent(), wxCommandEvent(EVT_WIPE_TOWER_CHART_CHANGED));
+    Refresh();
+}
+
+
+
+std::vector<float> Chart::get_ramming_speed(float sampling) const {
+    std::vector<float> speeds_out;
+    
+    const int number_of_samples = std::round( visible_area.m_width / sampling);
+    if (number_of_samples>0) {
+        const int dx = (m_line_to_draw.size()-1) / number_of_samples;
+        for (int j=0;j<number_of_samples;++j) {
+            float left =  screen_to_math(wxPoint(0,m_line_to_draw[j*dx])).m_y;
+            float right = screen_to_math(wxPoint(0,m_line_to_draw[(j+1)*dx])).m_y;
+            speeds_out.push_back((left+right)/2.f);            
+        }
+    }
+    return speeds_out;
+}
+
+
+std::vector<std::pair<float,float>> Chart::get_buttons() const {
+    std::vector<std::pair<float, float>> buttons_out;
+    for (const auto& button : m_buttons)
+        buttons_out.push_back(std::make_pair(float(button.get_pos().m_x),float(button.get_pos().m_y)));
+    return buttons_out;
+}
+    
+    
+    
+
+BEGIN_EVENT_TABLE(Chart, wxWindow)
+EVT_MOTION(Chart::mouse_moved)
+EVT_LEFT_DOWN(Chart::mouse_clicked)
+EVT_LEFT_UP(Chart::mouse_released)
+EVT_LEFT_DCLICK(Chart::mouse_double_clicked)
+EVT_RIGHT_DOWN(Chart::mouse_right_button_clicked)
+EVT_LEAVE_WINDOW(Chart::mouse_left_window)
+EVT_PAINT(Chart::paint_event)
+END_EVENT_TABLE()

src/slic3r/GUI/RammingChart.hpp

@@ -0,0 +1,115 @@
+#ifndef RAMMING_CHART_H_
+#define RAMMING_CHART_H_
+
+#include <vector>
+#include <wx/wxprec.h>
+#ifndef WX_PRECOMP
+    #include <wx/wx.h>
+#endif
+
+wxDECLARE_EVENT(EVT_WIPE_TOWER_CHART_CHANGED, wxCommandEvent);
+
+
+class Chart : public wxWindow {
+        
+public:
+    Chart(wxWindow* parent, wxRect rect,const std::vector<std::pair<float,float>>& initial_buttons,int ramming_speed_size, float sampling) :
+        wxWindow(parent,wxID_ANY,rect.GetTopLeft(),rect.GetSize())
+    {
+        SetBackgroundStyle(wxBG_STYLE_PAINT);
+        m_rect = wxRect(wxPoint(50,0),rect.GetSize()-wxSize(50,50));
+        visible_area = wxRect2DDouble(0.0, 0.0, sampling*ramming_speed_size, 20.);
+        m_buttons.clear();
+        if (initial_buttons.size()>0)
+            for (const auto& pair : initial_buttons)
+                m_buttons.push_back(wxPoint2DDouble(pair.first,pair.second));
+        recalculate_line();
+    }
+    void set_xy_range(float x,float y) {
+        x = int(x/0.5) * 0.5;
+        if (x>=0) visible_area.SetRight(x);
+        if (y>=0) visible_area.SetBottom(y);
+        recalculate_line();
+    }
+    float get_volume() const { return m_total_volume; }
+    float get_time()   const { return visible_area.m_width; }
+    
+    std::vector<float> get_ramming_speed(float sampling) const; //returns sampled ramming speed
+    std::vector<std::pair<float,float>> get_buttons() const; // returns buttons position   
+    
+    void draw();
+    
+    void mouse_clicked(wxMouseEvent& event);
+    void mouse_right_button_clicked(wxMouseEvent& event);
+    void mouse_moved(wxMouseEvent& event);
+    void mouse_double_clicked(wxMouseEvent& event);
+    void mouse_left_window(wxMouseEvent&) { m_dragged = nullptr; }        
+    void mouse_released(wxMouseEvent&)    { m_dragged = nullptr; }
+    void paint_event(wxPaintEvent&) { draw(); }
+    DECLARE_EVENT_TABLE()
+    
+
+        
+private:
+    static const bool fixed_x = true;
+    static const bool splines = true;
+    static const bool manual_points_manipulation = false;
+    static const int side = 10; // side of draggable button
+
+    class ButtonToDrag {
+    public:
+        bool operator<(const ButtonToDrag& a) const { return m_pos.m_x < a.m_pos.m_x; }
+        ButtonToDrag(wxPoint2DDouble pos) : m_pos{pos} {};
+        wxPoint2DDouble get_pos() const { return m_pos; }            
+        void move(double x,double y) { m_pos.m_x+=x; m_pos.m_y+=y; }
+    private:
+        wxPoint2DDouble m_pos;              // position in math coordinates                       
+    };
+    
+    
+    
+    wxPoint math_to_screen(const wxPoint2DDouble& math) const {
+        wxPoint screen;
+        screen.x = (math.m_x-visible_area.m_x) * (m_rect.GetWidth()  / visible_area.m_width  );
+        screen.y = (math.m_y-visible_area.m_y) * (m_rect.GetHeight() / visible_area.m_height );
+        screen.y *= -1;
+        screen += m_rect.GetLeftBottom();            
+        return screen;
+    }
+    wxPoint2DDouble screen_to_math(const wxPoint& screen) const {
+        wxPoint2DDouble math = screen;
+        math -= m_rect.GetLeftBottom();
+        math.m_y *= -1;
+        math.m_x *= visible_area.m_width   / m_rect.GetWidth();    // scales to [0;1]x[0,1]
+        math.m_y *= visible_area.m_height / m_rect.GetHeight();
+        return (math+visible_area.GetLeftTop());
+    }
+        
+    int which_button_is_clicked(const wxPoint& point) const {
+        if (!m_rect.Contains(point))
+            return -1;
+        for (unsigned int i=0;i<m_buttons.size();++i) {
+            wxRect rect(math_to_screen(m_buttons[i].get_pos())-wxPoint(side/2.,side/2.),wxSize(side,side)); // bounding rectangle of this button
+            if ( rect.Contains(point) )
+                return i;
+        }
+        return (-1);
+    }
+        
+        
+    void recalculate_line();
+    void recalculate_volume();
+     
+    
+    wxRect m_rect;                  // rectangle on screen the chart is mapped into (screen coordinates)
+    wxPoint m_previous_mouse;        
+    std::vector<ButtonToDrag> m_buttons;
+    std::vector<int> m_line_to_draw;
+    wxRect2DDouble visible_area;
+    ButtonToDrag* m_dragged = nullptr;
+    float m_total_volume = 0.f;  
+    
+};
+
+
+#endif // RAMMING_CHART_H_

src/slic3r/GUI/Tab.hpp

@@ -0,0 +1,385 @@
+#ifndef slic3r_Tab_hpp_
+#define slic3r_Tab_hpp_
+
+//	 The "Expert" tab at the right of the main tabbed window.
+//	
+//	 This file implements following packages:
+//	   Slic3r::GUI::Tab;
+//	       Slic3r::GUI::Tab::Print;
+//	       Slic3r::GUI::Tab::Filament;
+//	       Slic3r::GUI::Tab::Printer;
+//	   Slic3r::GUI::Tab::Page
+//	       - Option page: For example, the Slic3r::GUI::Tab::Print has option pages "Layers and perimeters", "Infill", "Skirt and brim" ...
+//	   Slic3r::GUI::SavePresetWindow
+//	       - Dialog to select a new preset name to store the configuration.
+//	   Slic3r::GUI::Tab::Preset;
+//	       - Single preset item: name, file is default or external.
+
+#include <wx/panel.h>
+#include <wx/notebook.h>
+#include <wx/scrolwin.h>
+#include <wx/sizer.h>
+#include <wx/bmpcbox.h>
+#include <wx/bmpbuttn.h>
+#include <wx/treectrl.h>
+#include <wx/imaglist.h>
+#include <wx/statbox.h>
+#include <wx/dataview.h>
+
+#include <map>
+#include <vector>
+#include <memory>
+
+#include "BedShapeDialog.hpp"
+
+//!enum { ID_TAB_TREE = wxID_HIGHEST + 1 };
+
+namespace Slic3r {
+namespace GUI {
+
+typedef std::pair<wxBitmap*, std::string>				t_icon_description;
+typedef std::vector<std::pair<wxBitmap*, std::string>>	t_icon_descriptions;
+
+// Single Tab page containing a{ vsizer } of{ optgroups }
+// package Slic3r::GUI::Tab::Page;
+using ConfigOptionsGroupShp = std::shared_ptr<ConfigOptionsGroup>;
+class Page : public wxScrolledWindow
+{
+	wxWindow*		m_parent;
+	wxString		m_title;
+	size_t			m_iconID;
+	wxBoxSizer*		m_vsizer;
+public:
+	Page(wxWindow* parent, const wxString title, const int iconID) :
+			m_parent(parent),
+			m_title(title),
+			m_iconID(iconID)
+	{
+		Create(m_parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL);
+		m_vsizer = new wxBoxSizer(wxVERTICAL);
+		m_item_color = &get_label_clr_default();
+		SetSizer(m_vsizer);
+	}
+	~Page(){}
+
+	bool				m_is_modified_values{ false };
+	bool				m_is_nonsys_values{ true };
+
+public:
+	std::vector <ConfigOptionsGroupShp> m_optgroups;
+	DynamicPrintConfig* m_config;
+
+	wxBoxSizer*	vsizer() const { return m_vsizer; }
+	wxWindow*	parent() const { return m_parent; }
+	wxString	title()	 const { return m_title; }
+	size_t		iconID() const { return m_iconID; }
+	void		set_config(DynamicPrintConfig* config_in) { m_config = config_in; }
+	void		reload_config();
+	Field*		get_field(const t_config_option_key& opt_key, int opt_index = -1) const;
+	bool		set_value(const t_config_option_key& opt_key, const boost::any& value);
+	ConfigOptionsGroupShp	new_optgroup(const wxString& title, int noncommon_label_width = -1);
+
+	bool		set_item_colour(const wxColour *clr) {
+		if (m_item_color != clr) {
+			m_item_color = clr;
+			return true;
+		}
+		return false;
+	}
+
+	const wxColour	get_item_colour() {
+			return *m_item_color;
+	}
+
+protected:
+	// Color of TreeCtrlItem. The wxColour will be updated only if the new wxColour pointer differs from the currently rendered one.
+	const wxColour*		m_item_color;
+};
+
+// Slic3r::GUI::Tab;
+
+using PageShp = std::shared_ptr<Page>;
+class Tab: public wxPanel
+{
+	wxNotebook*			m_parent;
+#ifdef __WXOSX__
+	wxPanel*			m_tmp_panel;
+	int					m_size_move = -1;
+#endif // __WXOSX__
+protected:
+	std::string			m_name;
+	const wxString		m_title;
+	wxBitmapComboBox*	m_presets_choice;
+	wxBitmapButton*		m_btn_save_preset;
+	wxBitmapButton*		m_btn_delete_preset;
+	wxBitmapButton*		m_btn_hide_incompatible_presets;
+	wxBoxSizer*			m_hsizer;
+	wxBoxSizer*			m_left_sizer;
+	wxTreeCtrl*			m_treectrl;
+	wxImageList*		m_icons;
+	wxCheckBox*			m_compatible_printers_checkbox;
+	wxButton*			m_compatible_printers_btn;
+	wxButton*			m_undo_btn;
+	wxButton*			m_undo_to_sys_btn;
+	wxButton*			m_question_btn;
+	wxComboCtrl*		m_cc_presets_choice;
+	wxDataViewTreeCtrl*	m_presetctrl;
+	wxImageList*		m_preset_icons;
+
+	// Cached bitmaps.
+	// A "flag" icon to be displayned next to the preset name in the Tab's combo box.
+	wxBitmap			m_bmp_show_incompatible_presets;
+	wxBitmap			m_bmp_hide_incompatible_presets;
+	// Bitmaps to be shown on the "Revert to system" aka "Lock to system" button next to each input field.
+	wxBitmap 			m_bmp_value_lock;
+	wxBitmap 			m_bmp_value_unlock;
+	wxBitmap 			m_bmp_white_bullet;
+	// The following bitmap points to either m_bmp_value_unlock or m_bmp_white_bullet, depending on whether the current preset has a parent preset.
+	wxBitmap 		   *m_bmp_non_system;
+	// Bitmaps to be shown on the "Undo user changes" button next to each input field.
+	wxBitmap 			m_bmp_value_revert;
+// 	wxBitmap 			m_bmp_value_unmodified;
+	wxBitmap			m_bmp_question;
+
+	// Colors for ui "decoration"
+	wxColour			m_sys_label_clr;
+	wxColour			m_modified_label_clr;
+	wxColour			m_default_text_clr;
+
+	// Tooltip text for reset buttons (for whole options group)
+	wxString			m_ttg_value_lock;
+	wxString			m_ttg_value_unlock;
+	wxString			m_ttg_white_bullet_ns;
+	// The following text points to either m_ttg_value_unlock or m_ttg_white_bullet_ns, depending on whether the current preset has a parent preset.
+	wxString			*m_ttg_non_system;
+	// Tooltip text to be shown on the "Undo user changes" button next to each input field.
+	wxString			m_ttg_white_bullet;
+	wxString			m_ttg_value_revert;
+
+	// Tooltip text for reset buttons (for each option in group)
+	wxString			m_tt_value_lock;
+	wxString			m_tt_value_unlock;
+	// The following text points to either m_tt_value_unlock or m_ttg_white_bullet_ns, depending on whether the current preset has a parent preset.
+	wxString			*m_tt_non_system;
+	// Tooltip text to be shown on the "Undo user changes" button next to each input field.
+	wxString			m_tt_white_bullet;
+	wxString			m_tt_value_revert;
+
+	int					m_icon_count;
+	std::map<std::string, size_t>	m_icon_index;		// Map from an icon file name to its index
+	std::vector<PageShp>			m_pages;
+	bool				m_disable_tree_sel_changed_event;
+	bool				m_show_incompatible_presets;
+
+	std::vector<std::string>	m_reload_dependent_tabs = {};
+	enum OptStatus { osSystemValue = 1, osInitValue = 2 };
+	std::map<std::string, int>	m_options_list;
+	int							m_opt_status_value = 0;
+
+	t_icon_descriptions	m_icon_descriptions = {};
+
+	// The two following two event IDs are generated at Plater.pm by calling Wx::NewEventType.
+	wxEventType			m_event_value_change = 0;
+	wxEventType 		m_event_presets_changed = 0;
+
+	bool				m_is_modified_values{ false };
+	bool				m_is_nonsys_values{ true };
+	bool				m_postpone_update_ui {false};
+
+	size_t				m_selected_preset_item{ 0 };
+
+public:
+	PresetBundle*		m_preset_bundle;
+	bool				m_show_btn_incompatible_presets = false;
+	PresetCollection*	m_presets;
+	DynamicPrintConfig*	m_config;
+	ogStaticText*		m_parent_preset_description_line;
+	wxStaticText*		m_colored_Label = nullptr;
+
+public:
+	Tab() {}
+	Tab(wxNotebook* parent, const wxString& title, const char* name) : 
+		m_parent(parent), m_title(title), m_name(name) {
+		Create(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxBK_LEFT | wxTAB_TRAVERSAL, name);
+		get_tabs_list().push_back(this);
+	}
+	~Tab(){
+		delete_tab_from_list(this);
+	}
+
+	wxWindow*	parent() const { return m_parent; }
+	wxString	title()	 const { return m_title; }
+	std::string	name()	 const { return m_name; }
+
+	// Set the events to the callbacks posted to the main frame window (currently implemented in Perl).
+	void 		set_event_value_change(wxEventType evt) { m_event_value_change = evt; }
+	void 		set_event_presets_changed(wxEventType evt) { m_event_presets_changed = evt; }
+	
+	void		create_preset_tab(PresetBundle *preset_bundle);
+	void		load_current_preset();
+	void        rebuild_page_tree(bool tree_sel_change_event = false);
+	void		select_preset(std::string preset_name = "");
+	bool		may_discard_current_dirty_preset(PresetCollection* presets = nullptr, const std::string& new_printer_name = "");
+	wxSizer*	compatible_printers_widget(wxWindow* parent, wxCheckBox** checkbox, wxButton** btn);
+
+	void		update_presetsctrl(wxDataViewTreeCtrl* ui, bool show_incompatible);
+	void		load_key_value(const std::string& opt_key, const boost::any& value, bool saved_value = false);
+	void		reload_compatible_printers_widget();
+
+	void		OnTreeSelChange(wxTreeEvent& event);
+	void		OnKeyDown(wxKeyEvent& event);
+
+	void		save_preset(std::string name = "");
+	void		delete_preset();
+	void		toggle_show_hide_incompatible();
+	void		update_show_hide_incompatible_button();
+	void		update_ui_from_settings();
+	void		update_labels_colour();
+	void		update_changed_ui();
+	void		get_sys_and_mod_flags(const std::string& opt_key, bool& sys_page, bool& modified_page);
+	void		update_changed_tree_ui();
+	void		update_undo_buttons();
+
+	void		on_roll_back_value(const bool to_sys = false);
+
+	PageShp		add_options_page(const wxString& title, const std::string& icon, bool is_extruder_pages = false);
+
+	virtual void	OnActivate();
+	virtual void	on_preset_loaded(){}
+	virtual void	build() = 0;
+	virtual void	update() = 0;
+	virtual void	init_options_list();
+	void			load_initial_data();
+	void			update_dirty();
+	void			update_tab_ui();
+	void			load_config(const DynamicPrintConfig& config);
+	virtual void	reload_config();
+	Field*			get_field(const t_config_option_key& opt_key, int opt_index = -1) const;
+	bool			set_value(const t_config_option_key& opt_key, const boost::any& value);
+	wxSizer*		description_line_widget(wxWindow* parent, ogStaticText** StaticText);
+	bool			current_preset_is_dirty();
+
+	DynamicPrintConfig*	get_config() { return m_config; }
+	PresetCollection*	get_presets() { return m_presets; }
+	std::vector<std::string>	get_dependent_tabs() { return m_reload_dependent_tabs; }
+	size_t				get_selected_preset_item() { return m_selected_preset_item; }
+
+	void			on_value_change(const std::string& opt_key, const boost::any& value);
+
+    void            update_wiping_button_visibility();
+protected:
+	void			on_presets_changed();
+	void			update_preset_description_line();
+	void			update_frequently_changed_parameters();
+	void			update_tab_presets(wxComboCtrl* ui, bool show_incompatible);
+	void			fill_icon_descriptions();
+	void			set_tooltips_text();
+};
+
+//Slic3r::GUI::Tab::Print;
+class TabPrint : public Tab
+{
+public:
+	TabPrint() {}
+	TabPrint(wxNotebook* parent) : 
+		Tab(parent, _(L("Print Settings")), "print") {}
+	~TabPrint(){}
+
+	ogStaticText*	m_recommended_thin_wall_thickness_description_line;
+	bool		m_support_material_overhangs_queried = false;
+
+	void		build() override;
+	void		reload_config() override;
+	void		update() override;
+	void		OnActivate() override;
+};
+
+//Slic3r::GUI::Tab::Filament;
+class TabFilament : public Tab
+{
+	ogStaticText*	m_volumetric_speed_description_line;
+	ogStaticText*	m_cooling_description_line;
+public:
+	TabFilament() {}
+	TabFilament(wxNotebook* parent) : 
+		Tab(parent, _(L("Filament Settings")), "filament") {}
+	~TabFilament(){}
+
+	void		build() override;
+	void		reload_config() override;
+	void		update() override;
+	void		OnActivate() override;
+};
+
+//Slic3r::GUI::Tab::Printer;
+class TabPrinter : public Tab
+{
+	bool		m_has_single_extruder_MM_page = false;
+	bool		m_use_silent_mode = false;
+	void		append_option_line(ConfigOptionsGroupShp optgroup, const std::string opt_key);
+	bool		m_rebuild_kinematics_page = false;
+
+    std::vector<PageShp>			m_pages_fff;
+    std::vector<PageShp>			m_pages_sla;
+public:
+	wxButton*	m_serial_test_btn;
+	wxButton*	m_print_host_test_btn;
+	wxButton*	m_printhost_browse_btn;
+
+	size_t		m_extruders_count;
+	size_t		m_extruders_count_old = 0;
+	size_t		m_initial_extruders_count;
+	size_t		m_sys_extruders_count;
+
+    PrinterTechnology               m_printer_technology = ptFFF;
+
+	TabPrinter() {}
+	TabPrinter(wxNotebook* parent) : Tab(parent, _(L("Printer Settings")), "printer") {}
+	~TabPrinter(){}
+
+	void		build() override;
+    void		build_fff();
+    void		build_sla();
+    void		update() override;
+    void		update_fff();
+    void		update_sla();
+    void        update_pages(); // update m_pages according to printer technology
+	void		update_serial_ports();
+	void		extruders_count_changed(size_t extruders_count);
+	PageShp		build_kinematics_page();
+	void		build_extruder_pages();
+	void		on_preset_loaded() override;
+	void		init_options_list() override;
+};
+
+class TabSLAMaterial : public Tab
+{
+public:
+    TabSLAMaterial() {}
+    TabSLAMaterial(wxNotebook* parent) :
+		Tab(parent, _(L("SLA Material Settings")), "sla_material") {}
+    ~TabSLAMaterial(){}
+
+	void		build() override;
+	void		update() override;
+    void		init_options_list() override;
+};
+
+class SavePresetWindow :public wxDialog
+{
+public:
+	SavePresetWindow(wxWindow* parent) :wxDialog(parent, wxID_ANY, _(L("Save preset"))){}
+	~SavePresetWindow(){}
+
+	std::string		m_chosen_name;
+	wxComboBox*		m_combo;
+
+	void			build(const wxString& title, const std::string& default_name, std::vector<std::string> &values);
+	void			accept();
+	std::string		get_name() { return m_chosen_name; }
+};
+
+} // GUI
+} // Slic3r
+
+#endif /* slic3r_Tab_hpp_ */

src/slic3r/GUI/TabIface.cpp

@@ -0,0 +1,20 @@
+#include "TabIface.hpp"
+#include "Tab.hpp"
+
+namespace Slic3r {
+
+void	TabIface::load_current_preset()		{ m_tab->load_current_preset(); }
+void	TabIface::update_tab_ui()			{ m_tab->update_tab_ui(); }
+void	TabIface::update_ui_from_settings()	{ m_tab->update_ui_from_settings();}
+void	TabIface::select_preset(char* name)	{ m_tab->select_preset(name);}
+void	TabIface::load_config(DynamicPrintConfig* config)	{ m_tab->load_config(*config);}
+void	TabIface::load_key_value(char* opt_key, char* value){ m_tab->load_key_value(opt_key, static_cast<std::string>(value)); }
+bool	TabIface::current_preset_is_dirty()					{ return m_tab->current_preset_is_dirty();}
+void	TabIface::OnActivate()								{ return m_tab->OnActivate();}
+size_t	TabIface::get_selected_preset_item()				{ return m_tab->get_selected_preset_item(); }
+std::string					TabIface::title()				{ return m_tab->title().ToUTF8().data(); }
+DynamicPrintConfig*			TabIface::get_config()			{ return m_tab->get_config(); }
+PresetCollection*			TabIface::get_presets()			{ return m_tab!=nullptr ? m_tab->get_presets() : nullptr; }
+std::vector<std::string>	TabIface::get_dependent_tabs()	{ return m_tab->get_dependent_tabs(); }
+
+}; // namespace Slic3r

src/slic3r/GUI/TabIface.hpp

@@ -0,0 +1,41 @@
+#ifndef slic3r_TabIface_hpp_
+#define slic3r_TabIface_hpp_
+
+#include <vector>
+#include <string>
+
+namespace Slic3r {
+	class DynamicPrintConfig;
+	class PresetCollection;
+
+namespace GUI {
+	class Tab;
+}
+
+class TabIface {
+public:
+	TabIface() : m_tab(nullptr) {}
+	TabIface(GUI::Tab *tab) : m_tab(tab) {}
+//	TabIface(const TabIface &rhs) : m_tab(rhs.m_tab) {}
+
+	void		load_current_preset();
+	void		update_tab_ui();
+	void		update_ui_from_settings();
+	void		select_preset(char* name);
+	std::string title();
+	void		load_config(DynamicPrintConfig* config);
+	void		load_key_value(char* opt_key, char* value);
+	bool		current_preset_is_dirty();
+	void		OnActivate();
+	DynamicPrintConfig*			get_config();
+	PresetCollection*			get_presets();
+	std::vector<std::string>	get_dependent_tabs();
+	size_t						get_selected_preset_item();
+
+protected:
+	GUI::Tab   *m_tab;
+}; // namespace GUI
+
+}; // namespace Slic3r
+
+#endif /* slic3r_TabIface_hpp_ */

src/slic3r/GUI/UpdateDialogs.cpp

@@ -0,0 +1,196 @@
+#include "UpdateDialogs.hpp"
+
+#include <wx/settings.h>
+#include <wx/sizer.h>
+#include <wx/event.h>
+#include <wx/stattext.h>
+#include <wx/button.h>
+#include <wx/hyperlink.h>
+#include <wx/statbmp.h>
+#include <wx/checkbox.h>
+
+#include "libslic3r/libslic3r.h"
+#include "libslic3r/Utils.hpp"
+#include "GUI.hpp"
+#include "ConfigWizard.hpp"
+
+namespace Slic3r {
+namespace GUI {
+
+
+static const std::string CONFIG_UPDATE_WIKI_URL("https://github.com/prusa3d/Slic3r/wiki/Slic3r-PE-1.40-configuration-update");
+
+
+// MsgUpdateSlic3r
+
+MsgUpdateSlic3r::MsgUpdateSlic3r(const Semver &ver_current, const Semver &ver_online) :
+	MsgDialog(nullptr, _(L("Update available")), _(L("New version of Slic3r PE is available"))),
+	ver_current(ver_current),
+	ver_online(ver_online)
+{
+	const auto url = wxString::Format("https://github.com/prusa3d/Slic3r/releases/tag/version_%s", ver_online.to_string());
+	auto *link = new wxHyperlinkCtrl(this, wxID_ANY, url, url);
+
+	auto *text = new wxStaticText(this, wxID_ANY, _(L("To download, follow the link below.")));
+	const auto link_width = link->GetSize().GetWidth();
+	text->Wrap(CONTENT_WIDTH > link_width ? CONTENT_WIDTH : link_width);
+	content_sizer->Add(text);
+	content_sizer->AddSpacer(VERT_SPACING);
+
+	auto *versions = new wxFlexGridSizer(2, 0, VERT_SPACING);
+	versions->Add(new wxStaticText(this, wxID_ANY, _(L("Current version:"))));
+	versions->Add(new wxStaticText(this, wxID_ANY, ver_current.to_string()));
+	versions->Add(new wxStaticText(this, wxID_ANY, _(L("New version:"))));
+	versions->Add(new wxStaticText(this, wxID_ANY, ver_online.to_string()));
+	content_sizer->Add(versions);
+	content_sizer->AddSpacer(VERT_SPACING);
+
+	content_sizer->Add(link);
+	content_sizer->AddSpacer(2*VERT_SPACING);
+
+	cbox = new wxCheckBox(this, wxID_ANY, _(L("Don't notify about new releases any more")));
+	content_sizer->Add(cbox);
+	content_sizer->AddSpacer(VERT_SPACING);
+
+	Fit();
+}
+
+MsgUpdateSlic3r::~MsgUpdateSlic3r() {}
+
+bool MsgUpdateSlic3r::disable_version_check() const
+{
+	return cbox->GetValue();
+}
+
+
+// MsgUpdateConfig
+
+MsgUpdateConfig::MsgUpdateConfig(const std::unordered_map<std::string, std::string> &updates) :
+	MsgDialog(nullptr, _(L("Configuration update")), _(L("Configuration update is available")), wxID_NONE)
+{
+	auto *text = new wxStaticText(this, wxID_ANY, _(L(
+		"Would you like to install it?\n\n"
+		"Note that a full configuration snapshot will be created first. It can then be restored at any time "
+		"should there be a problem with the new version.\n\n"
+		"Updated configuration bundles:"
+	)));
+	text->Wrap(CONTENT_WIDTH);
+	content_sizer->Add(text);
+	content_sizer->AddSpacer(VERT_SPACING);
+
+	auto *versions = new wxFlexGridSizer(2, 0, VERT_SPACING);
+	for (const auto &update : updates) {
+		auto *text_vendor = new wxStaticText(this, wxID_ANY, update.first);
+		text_vendor->SetFont(boldfont);
+		versions->Add(text_vendor);
+		versions->Add(new wxStaticText(this, wxID_ANY, update.second));
+	}
+
+	content_sizer->Add(versions);
+	content_sizer->AddSpacer(2*VERT_SPACING);
+
+	auto *btn_cancel = new wxButton(this, wxID_CANCEL);
+	btn_sizer->Add(btn_cancel);
+	btn_sizer->AddSpacer(HORIZ_SPACING);
+	auto *btn_ok = new wxButton(this, wxID_OK);
+	btn_sizer->Add(btn_ok);
+	btn_ok->SetFocus();
+
+	Fit();
+}
+
+MsgUpdateConfig::~MsgUpdateConfig() {}
+
+
+// MsgDataIncompatible
+
+MsgDataIncompatible::MsgDataIncompatible(const std::unordered_map<std::string, wxString> &incompats) :
+	MsgDialog(nullptr, _(L("Slic3r incompatibility")), _(L("Slic3r configuration is incompatible")), wxBitmap(from_u8(Slic3r::var("Slic3r_192px_grayscale.png")), wxBITMAP_TYPE_PNG), wxID_NONE)
+{
+	auto *text = new wxStaticText(this, wxID_ANY, _(L(
+		"This version of Slic3r PE is not compatible with currently installed configuration bundles.\n"
+		"This probably happened as a result of running an older Slic3r PE after using a newer one.\n\n"
+
+		"You may either exit Slic3r and try again with a newer version, or you may re-run the initial configuration. "
+		"Doing so will create a backup snapshot of the existing configuration before installing files compatible with this Slic3r.\n"
+	)));
+	text->Wrap(CONTENT_WIDTH);
+	content_sizer->Add(text);
+
+	auto *text2 = new wxStaticText(this, wxID_ANY, wxString::Format(_(L("This Slic3r PE version: %s")), SLIC3R_VERSION));
+	text2->Wrap(CONTENT_WIDTH);
+	content_sizer->Add(text2);
+	content_sizer->AddSpacer(VERT_SPACING);
+
+	auto *text3 = new wxStaticText(this, wxID_ANY, _(L("Incompatible bundles:")));
+	text3->Wrap(CONTENT_WIDTH);
+	content_sizer->Add(text3);
+	content_sizer->AddSpacer(VERT_SPACING);
+
+	auto *versions = new wxFlexGridSizer(2, 0, VERT_SPACING);
+	for (const auto &incompat : incompats) {
+		auto *text_vendor = new wxStaticText(this, wxID_ANY, incompat.first);
+		text_vendor->SetFont(boldfont);
+		versions->Add(text_vendor);
+		versions->Add(new wxStaticText(this, wxID_ANY, incompat.second));
+	}
+
+	content_sizer->Add(versions);
+	content_sizer->AddSpacer(2*VERT_SPACING);
+
+	auto *btn_exit = new wxButton(this, wxID_EXIT, _(L("Exit Slic3r")));
+	btn_sizer->Add(btn_exit);
+	btn_sizer->AddSpacer(HORIZ_SPACING);
+	auto *btn_reconf = new wxButton(this, wxID_REPLACE, _(L("Re-configure")));
+	btn_sizer->Add(btn_reconf);
+	btn_exit->SetFocus();
+
+	auto exiter = [this](const wxCommandEvent& evt) { this->EndModal(evt.GetId()); };
+	btn_exit->Bind(wxEVT_BUTTON, exiter);
+	btn_reconf->Bind(wxEVT_BUTTON, exiter);
+
+	Fit();
+}
+
+MsgDataIncompatible::~MsgDataIncompatible() {}
+
+
+// MsgDataLegacy
+
+MsgDataLegacy::MsgDataLegacy() :
+	MsgDialog(nullptr, _(L("Configuration update")), _(L("Configuration update")))
+{
+	auto *text = new wxStaticText(this, wxID_ANY, wxString::Format(
+		_(L(
+			"Slic3r PE now uses an updated configuration structure.\n\n"
+
+			"So called 'System presets' have been introduced, which hold the built-in default settings for various "
+			"printers. These System presets cannot be modified, instead, users now may create their "
+			"own presets inheriting settings from one of the System presets.\n"
+			"An inheriting preset may either inherit a particular value from its parent or override it with a customized value.\n\n"
+
+			"Please proceed with the %s that follows to set up the new presets "
+			"and to choose whether to enable automatic preset updates."
+		)),
+		ConfigWizard::name()
+	));
+	text->Wrap(CONTENT_WIDTH);
+	content_sizer->Add(text);
+	content_sizer->AddSpacer(VERT_SPACING);
+
+	auto *text2 = new wxStaticText(this, wxID_ANY, _(L("For more information please visit our wiki page:")));
+	static const wxString url("https://github.com/prusa3d/Slic3r/wiki/Slic3r-PE-1.40-configuration-update");
+	// The wiki page name is intentionally not localized:
+	auto *link = new wxHyperlinkCtrl(this, wxID_ANY, "Slic3r PE 1.40 configuration update", CONFIG_UPDATE_WIKI_URL);
+	content_sizer->Add(text2);
+	content_sizer->Add(link);
+	content_sizer->AddSpacer(VERT_SPACING);
+
+	Fit();
+}
+
+MsgDataLegacy::~MsgDataLegacy() {}
+
+
+}
+}

src/slic3r/GUI/UpdateDialogs.hpp

@@ -0,0 +1,81 @@
+#ifndef slic3r_UpdateDialogs_hpp_
+#define slic3r_UpdateDialogs_hpp_
+
+#include <string>
+#include <unordered_map>
+
+#include "slic3r/Utils/Semver.hpp"
+#include "MsgDialog.hpp"
+
+class wxBoxSizer;
+class wxCheckBox;
+
+namespace Slic3r {
+
+namespace GUI {
+
+
+// A confirmation dialog listing configuration updates
+class MsgUpdateSlic3r : public MsgDialog
+{
+public:
+	MsgUpdateSlic3r(const Semver &ver_current, const Semver &ver_online);
+	MsgUpdateSlic3r(MsgUpdateSlic3r &&) = delete;
+	MsgUpdateSlic3r(const MsgUpdateSlic3r &) = delete;
+	MsgUpdateSlic3r &operator=(MsgUpdateSlic3r &&) = delete;
+	MsgUpdateSlic3r &operator=(const MsgUpdateSlic3r &) = delete;
+	virtual ~MsgUpdateSlic3r();
+
+	// Tells whether the user checked the "don't bother me again" checkbox
+	bool disable_version_check() const;
+
+private:
+	const Semver &ver_current;
+	const Semver &ver_online;
+	wxCheckBox *cbox;
+};
+
+
+// Confirmation dialog informing about configuration update. Lists updated bundles & their versions.
+class MsgUpdateConfig : public MsgDialog
+{
+public:
+	// updates is a map of "vendor name" -> "version (comment)"
+	MsgUpdateConfig(const std::unordered_map<std::string, std::string> &updates);
+	MsgUpdateConfig(MsgUpdateConfig &&) = delete;
+	MsgUpdateConfig(const MsgUpdateConfig &) = delete;
+	MsgUpdateConfig &operator=(MsgUpdateConfig &&) = delete;
+	MsgUpdateConfig &operator=(const MsgUpdateConfig &) = delete;
+	~MsgUpdateConfig();
+};
+
+// Informs about currently installed bundles not being compatible with the running Slic3r. Asks about action.
+class MsgDataIncompatible : public MsgDialog
+{
+public:
+	// incompats is a map of "vendor name" -> "version restrictions"
+	MsgDataIncompatible(const std::unordered_map<std::string, wxString> &incompats);
+	MsgDataIncompatible(MsgDataIncompatible &&) = delete;
+	MsgDataIncompatible(const MsgDataIncompatible &) = delete;
+	MsgDataIncompatible &operator=(MsgDataIncompatible &&) = delete;
+	MsgDataIncompatible &operator=(const MsgDataIncompatible &) = delete;
+	~MsgDataIncompatible();
+};
+
+// Informs about a legacy data directory - an update from Slic3r PE < 1.40
+class MsgDataLegacy : public MsgDialog
+{
+public:
+	MsgDataLegacy();
+	MsgDataLegacy(MsgDataLegacy &&) = delete;
+	MsgDataLegacy(const MsgDataLegacy &) = delete;
+	MsgDataLegacy &operator=(MsgDataLegacy &&) = delete;
+	MsgDataLegacy &operator=(const MsgDataLegacy &) = delete;
+	~MsgDataLegacy();
+};
+
+
+}
+}
+
+#endif

src/slic3r/GUI/Widget.hpp

@@ -0,0 +1,16 @@
+#ifndef WIDGET_HPP
+#define WIDGET_HPP
+#include <wx/wxprec.h>
+#ifndef WX_PRECOM
+#include <wx/wx.h>
+#endif
+
+class Widget {
+protected:
+    wxSizer* _sizer;
+public:
+    Widget(): _sizer(nullptr) { }
+    bool valid() const { return _sizer != nullptr; } 
+    wxSizer* sizer() const { return _sizer; } 
+};
+#endif

src/slic3r/GUI/WipeTowerDialog.cpp

@@ -0,0 +1,338 @@
+#include <algorithm>
+#include <sstream>
+#include "WipeTowerDialog.hpp"
+#include "GUI.hpp"
+
+#include <wx/sizer.h>
+
+RammingDialog::RammingDialog(wxWindow* parent,const std::string& parameters)
+: wxDialog(parent, wxID_ANY, _(L("Ramming customization")), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE/* | wxRESIZE_BORDER*/)
+{
+    m_panel_ramming  = new RammingPanel(this,parameters);
+
+    // Not found another way of getting the background colours of RammingDialog, RammingPanel and Chart correct than setting
+    // them all explicitely. Reading the parent colour yielded colour that didn't really match it, no wxSYS_COLOUR_... matched
+    // colour used for the dialog. Same issue (and "solution") here : https://forums.wxwidgets.org/viewtopic.php?f=1&t=39608
+    // Whoever can fix this, feel free to do so.
+    this->           SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_FRAMEBK));
+    m_panel_ramming->SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_FRAMEBK));
+    m_panel_ramming->Show(true);
+    this->Show();
+
+    auto main_sizer = new wxBoxSizer(wxVERTICAL);
+    main_sizer->Add(m_panel_ramming, 1, wxEXPAND | wxTOP | wxLEFT | wxRIGHT, 5);
+    main_sizer->Add(CreateButtonSizer(wxOK | wxCANCEL), 0, wxALIGN_CENTER_HORIZONTAL | wxTOP | wxBOTTOM, 10);
+    SetSizer(main_sizer);
+    main_sizer->SetSizeHints(this);
+
+    this->Bind(wxEVT_CLOSE_WINDOW, [this](wxCloseEvent& e) { EndModal(wxCANCEL); });
+
+    this->Bind(wxEVT_BUTTON,[this](wxCommandEvent&) {
+        m_output_data = m_panel_ramming->get_parameters();
+        EndModal(wxID_OK);
+        },wxID_OK);
+    this->Show();
+    wxMessageDialog(this,_(L("Ramming denotes the rapid extrusion just before a tool change in a single-extruder MM printer. Its purpose is to "
+                   "properly shape the end of the unloaded filament so it does not prevent insertion of the new filament and can itself "
+                   "be reinserted later. This phase is important and different materials can require different extrusion speeds to get "
+                   "the good shape. For this reason, the extrusion rates during ramming are adjustable.\n\nThis is an expert-level "
+                   "setting, incorrect adjustment will likely lead to jams, extruder wheel grinding into filament etc.")),_(L("Warning")),wxOK|wxICON_EXCLAMATION).ShowModal();
+}
+
+
+
+
+
+RammingPanel::RammingPanel(wxWindow* parent, const std::string& parameters)
+: wxPanel(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize/*,wxPoint(50,50), wxSize(800,350),wxBORDER_RAISED*/)
+{
+	auto sizer_chart = new wxBoxSizer(wxVERTICAL);
+	auto sizer_param = new wxBoxSizer(wxVERTICAL);
+
+	std::stringstream stream{ parameters };
+	stream >> m_ramming_line_width_multiplicator >> m_ramming_step_multiplicator;
+	int ramming_speed_size = 0;
+	float dummy = 0.f;
+	while (stream >> dummy)
+		++ramming_speed_size;
+	stream.clear();
+	stream.get();
+
+	std::vector<std::pair<float, float>> buttons;
+	float x = 0.f;
+	float y = 0.f;
+	while (stream >> x >> y)
+		buttons.push_back(std::make_pair(x, y));
+
+	m_chart = new Chart(this, wxRect(10, 10, 480, 360), buttons, ramming_speed_size, 0.25f);
+    m_chart->SetBackgroundColour(parent->GetBackgroundColour()); // see comment in RammingDialog constructor
+ 	sizer_chart->Add(m_chart, 0, wxALL, 5);
+
+    m_widget_time						= new wxSpinCtrlDouble(this,wxID_ANY,wxEmptyString,wxDefaultPosition,wxSize(75, -1),wxSP_ARROW_KEYS,0.,5.0,3.,0.5);        
+    m_widget_volume							  = new wxSpinCtrl(this,wxID_ANY,wxEmptyString,wxDefaultPosition,wxSize(75, -1),wxSP_ARROW_KEYS,0,10000,0);        
+    m_widget_ramming_line_width_multiplicator = new wxSpinCtrl(this,wxID_ANY,wxEmptyString,wxDefaultPosition,wxSize(75, -1),wxSP_ARROW_KEYS,10,200,100);        
+    m_widget_ramming_step_multiplicator		  = new wxSpinCtrl(this,wxID_ANY,wxEmptyString,wxDefaultPosition,wxSize(75, -1),wxSP_ARROW_KEYS,10,200,100);        
+
+	auto gsizer_param = new wxFlexGridSizer(2, 5, 15);
+	gsizer_param->Add(new wxStaticText(this, wxID_ANY, wxString(_(L("Total ramming time")) + " (" + _(L("s")) + "):")), 0, wxALIGN_CENTER_VERTICAL);
+	gsizer_param->Add(m_widget_time);
+	gsizer_param->Add(new wxStaticText(this, wxID_ANY, wxString(_(L("Total rammed volume")) + " (" + _(L("mm")) + wxString("³):", wxConvUTF8))), 0, wxALIGN_CENTER_VERTICAL);
+	gsizer_param->Add(m_widget_volume);
+	gsizer_param->AddSpacer(20);
+	gsizer_param->AddSpacer(20);
+	gsizer_param->Add(new wxStaticText(this, wxID_ANY, wxString(_(L("Ramming line width")) + " (%):")), 0, wxALIGN_CENTER_VERTICAL);
+	gsizer_param->Add(m_widget_ramming_line_width_multiplicator);
+	gsizer_param->Add(new wxStaticText(this, wxID_ANY, wxString(_(L("Ramming line spacing")) + " (%):")), 0, wxALIGN_CENTER_VERTICAL);
+	gsizer_param->Add(m_widget_ramming_step_multiplicator);
+
+	sizer_param->Add(gsizer_param, 0, wxTOP, 100);
+
+    m_widget_time->SetValue(m_chart->get_time());
+    m_widget_time->SetDigits(2);
+    m_widget_volume->SetValue(m_chart->get_volume());
+    m_widget_volume->Disable();
+    m_widget_ramming_line_width_multiplicator->SetValue(m_ramming_line_width_multiplicator);
+    m_widget_ramming_step_multiplicator->SetValue(m_ramming_step_multiplicator);        
+    
+    m_widget_ramming_step_multiplicator->Bind(wxEVT_TEXT,[this](wxCommandEvent&) { line_parameters_changed(); });
+    m_widget_ramming_line_width_multiplicator->Bind(wxEVT_TEXT,[this](wxCommandEvent&) { line_parameters_changed(); });
+
+	auto sizer = new wxBoxSizer(wxHORIZONTAL);
+	sizer->Add(sizer_chart, 0, wxALL, 5);
+	sizer->Add(sizer_param, 0, wxALL, 10);
+
+	sizer->SetSizeHints(this);
+	SetSizer(sizer);
+
+    m_widget_time->Bind(wxEVT_TEXT,[this](wxCommandEvent&) {m_chart->set_xy_range(m_widget_time->GetValue(),-1);});
+    m_widget_time->Bind(wxEVT_CHAR,[](wxKeyEvent&){});      // do nothing - prevents the user to change the value
+    m_widget_volume->Bind(wxEVT_CHAR,[](wxKeyEvent&){});    // do nothing - prevents the user to change the value   
+    Bind(EVT_WIPE_TOWER_CHART_CHANGED,[this](wxCommandEvent&) {m_widget_volume->SetValue(m_chart->get_volume()); m_widget_time->SetValue(m_chart->get_time());} );
+    Refresh(this);
+}
+
+void RammingPanel::line_parameters_changed() {
+    m_ramming_line_width_multiplicator = m_widget_ramming_line_width_multiplicator->GetValue();
+    m_ramming_step_multiplicator = m_widget_ramming_step_multiplicator->GetValue();
+}
+
+std::string RammingPanel::get_parameters()
+{
+    std::vector<float> speeds = m_chart->get_ramming_speed(0.25f);
+    std::vector<std::pair<float,float>> buttons = m_chart->get_buttons();
+    std::stringstream stream;
+    stream << m_ramming_line_width_multiplicator << " " << m_ramming_step_multiplicator;
+    for (const float& speed_value : speeds)
+        stream << " " << speed_value;
+    stream << "|";    
+    for (const auto& button : buttons)
+        stream << " " << button.first << " " << button.second;
+    return stream.str();
+}
+
+
+#define	ITEM_WIDTH	60
+// Parent dialog for purging volume adjustments - it fathers WipingPanel widget (that contains all controls) and a button to toggle simple/advanced mode:
+WipingDialog::WipingDialog(wxWindow* parent,const std::vector<float>& matrix, const std::vector<float>& extruders)
+: wxDialog(parent, wxID_ANY, _(L("Wipe tower - Purging volume adjustment")), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE/* | wxRESIZE_BORDER*/)
+{
+    auto widget_button = new wxButton(this,wxID_ANY,"-",wxPoint(0,0),wxDefaultSize);
+    m_panel_wiping  = new WipingPanel(this,matrix,extruders, widget_button);
+
+    auto main_sizer = new wxBoxSizer(wxVERTICAL);
+
+	// set min sizer width according to extruders count
+	const auto sizer_width = (int)((sqrt(matrix.size()) + 2.8)*ITEM_WIDTH);
+	main_sizer->SetMinSize(wxSize(sizer_width, -1));
+
+    main_sizer->Add(m_panel_wiping, 0, wxEXPAND | wxALL, 5);
+	main_sizer->Add(widget_button, 0, wxALIGN_CENTER_HORIZONTAL | wxCENTER | wxBOTTOM, 5);
+    main_sizer->Add(CreateButtonSizer(wxOK | wxCANCEL), 0, wxALIGN_CENTER_HORIZONTAL | wxBOTTOM, 10);
+    SetSizer(main_sizer);
+    main_sizer->SetSizeHints(this);
+
+    this->Bind(wxEVT_CLOSE_WINDOW, [this](wxCloseEvent& e) { EndModal(wxCANCEL); });
+    
+    this->Bind(wxEVT_BUTTON,[this](wxCommandEvent&) {                 // if OK button is clicked..
+        m_output_matrix    = m_panel_wiping->read_matrix_values();    // ..query wiping panel and save returned values
+        m_output_extruders = m_panel_wiping->read_extruders_values(); // so they can be recovered later by calling get_...()
+        EndModal(wxID_OK);
+        },wxID_OK);
+
+    this->Show();
+}
+
+// This function allows to "play" with sizers parameters (like align or border)
+void WipingPanel::format_sizer(wxSizer* sizer, wxPanel* page, wxGridSizer* grid_sizer, const wxString& info, const wxString& table_title, int table_lshift/*=0*/)
+{
+	sizer->Add(new wxStaticText(page, wxID_ANY, info,wxDefaultPosition,wxSize(0,50)), 0, wxEXPAND | wxLEFT, 15);
+	auto table_sizer = new wxBoxSizer(wxVERTICAL);
+	sizer->Add(table_sizer, 0, wxALIGN_CENTER | wxCENTER, table_lshift);
+	table_sizer->Add(new wxStaticText(page, wxID_ANY, table_title), 0, wxALIGN_CENTER | wxTOP, 50);
+	table_sizer->Add(grid_sizer, 0, wxALIGN_CENTER | wxTOP, 10);
+}
+
+// This panel contains all control widgets for both simple and advanced mode (these reside in separate sizers)
+WipingPanel::WipingPanel(wxWindow* parent, const std::vector<float>& matrix, const std::vector<float>& extruders, wxButton* widget_button)
+: wxPanel(parent,wxID_ANY, wxDefaultPosition, wxDefaultSize/*,wxBORDER_RAISED*/)
+{
+    m_widget_button = widget_button;    // pointer to the button in parent dialog
+    m_widget_button->Bind(wxEVT_BUTTON,[this](wxCommandEvent&){ toggle_advanced(true); });
+
+    m_number_of_extruders = (int)(sqrt(matrix.size())+0.001);
+
+	// Create two switched panels with their own sizers
+    m_sizer_simple          = new wxBoxSizer(wxVERTICAL);
+    m_sizer_advanced        = new wxBoxSizer(wxVERTICAL);
+	m_page_simple			= new wxPanel(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL);
+	m_page_advanced			= new wxPanel(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL);
+	m_page_simple->SetSizer(m_sizer_simple);
+	m_page_advanced->SetSizer(m_sizer_advanced);
+
+    auto gridsizer_simple   = new wxGridSizer(3, 5, 10);
+    m_gridsizer_advanced = new wxGridSizer(m_number_of_extruders+1, 5, 1);
+
+	// First create controls for advanced mode and assign them to m_page_advanced:
+	for (unsigned int i = 0; i < m_number_of_extruders; ++i) {
+		edit_boxes.push_back(std::vector<wxTextCtrl*>(0));
+
+		for (unsigned int j = 0; j < m_number_of_extruders; ++j) {
+			edit_boxes.back().push_back(new wxTextCtrl(m_page_advanced, wxID_ANY, wxEmptyString, wxDefaultPosition, wxSize(ITEM_WIDTH, -1)));
+			if (i == j)
+				edit_boxes[i][j]->Disable();
+			else
+				edit_boxes[i][j]->SetValue(wxString("") << int(matrix[m_number_of_extruders*j + i]));
+		}
+	}
+	m_gridsizer_advanced->Add(new wxStaticText(m_page_advanced, wxID_ANY, wxString("")));
+	for (unsigned int i = 0; i < m_number_of_extruders; ++i)
+		m_gridsizer_advanced->Add(new wxStaticText(m_page_advanced, wxID_ANY, wxString("") << i + 1), 0, wxALIGN_CENTER | wxALIGN_CENTER_VERTICAL);
+	for (unsigned int i = 0; i < m_number_of_extruders; ++i) {
+		m_gridsizer_advanced->Add(new wxStaticText(m_page_advanced, wxID_ANY, wxString("") << i + 1), 0, wxALIGN_CENTER | wxALIGN_CENTER_VERTICAL);
+		for (unsigned int j = 0; j < m_number_of_extruders; ++j)
+			m_gridsizer_advanced->Add(edit_boxes[j][i], 0);
+	}
+
+	// collect and format sizer
+	format_sizer(m_sizer_advanced, m_page_advanced, m_gridsizer_advanced,
+		_(L("Here you can adjust required purging volume (mm³) for any given pair of tools.")),
+		_(L("Extruder changed to")));
+
+	// Hide preview page before new page creating 
+	// It allows to do that from a beginning of the main panel
+	m_page_advanced->Hide(); 
+
+	// Now the same for simple mode:
+	gridsizer_simple->Add(new wxStaticText(m_page_simple, wxID_ANY, wxString("")), 0, wxALIGN_CENTER | wxALIGN_CENTER_VERTICAL);
+	gridsizer_simple->Add(new wxStaticText(m_page_simple, wxID_ANY, wxString(_(L("unloaded")))), 0, wxALIGN_CENTER | wxALIGN_CENTER_VERTICAL);
+    gridsizer_simple->Add(new wxStaticText(m_page_simple,wxID_ANY,wxString(_(L("loaded")))), 0, wxALIGN_CENTER | wxALIGN_CENTER_VERTICAL);
+
+	for (unsigned int i=0;i<m_number_of_extruders;++i) {
+        m_old.push_back(new wxSpinCtrl(m_page_simple,wxID_ANY,wxEmptyString,wxDefaultPosition, wxSize(80, -1),wxSP_ARROW_KEYS|wxALIGN_RIGHT,0,300,extruders[2*i]));
+        m_new.push_back(new wxSpinCtrl(m_page_simple,wxID_ANY,wxEmptyString,wxDefaultPosition, wxSize(80, -1),wxSP_ARROW_KEYS|wxALIGN_RIGHT,0,300,extruders[2*i+1]));
+		gridsizer_simple->Add(new wxStaticText(m_page_simple, wxID_ANY, wxString(_(L("Tool #"))) << i + 1 << ": "), 0, wxALIGN_LEFT | wxALIGN_CENTER_VERTICAL);
+        gridsizer_simple->Add(m_old.back(),0);
+        gridsizer_simple->Add(m_new.back(),0);
+	}
+
+	// collect and format sizer
+	format_sizer(m_sizer_simple, m_page_simple, gridsizer_simple,
+		_(L("Total purging volume is calculated by summing two values below, depending on which tools are loaded/unloaded.")),
+		_(L("Volume to purge (mm³) when the filament is being")), 50);
+
+	m_sizer = new wxBoxSizer(wxVERTICAL);
+	m_sizer->Add(m_page_simple, 0, wxEXPAND | wxALL, 25);
+	m_sizer->Add(m_page_advanced, 0, wxEXPAND | wxALL, 25);
+
+	m_sizer->SetSizeHints(this);
+	SetSizer(m_sizer);
+
+    toggle_advanced(); // to show/hide what is appropriate
+    
+    m_page_advanced->Bind(wxEVT_PAINT,[this](wxPaintEvent&) {
+                                              wxPaintDC dc(m_page_advanced);
+                                              int y_pos = 0.5 * (edit_boxes[0][0]->GetPosition().y + edit_boxes[0][edit_boxes.size()-1]->GetPosition().y + edit_boxes[0][edit_boxes.size()-1]->GetSize().y);
+                                              wxString label = _(L("From"));
+                                              int text_width = 0;
+                                              int text_height = 0;
+                                              dc.GetTextExtent(label,&text_width,&text_height);
+                                              int xpos = m_gridsizer_advanced->GetPosition().x;
+                                              dc.DrawRotatedText(label,xpos-text_height,y_pos + text_width/2.f,90);
+    });
+}
+
+
+
+
+// Reads values from the (advanced) wiping matrix:
+std::vector<float> WipingPanel::read_matrix_values() {
+    if (!m_advanced)
+        fill_in_matrix();
+    std::vector<float> output;
+    for (unsigned int i=0;i<m_number_of_extruders;++i) {
+        for (unsigned int j=0;j<m_number_of_extruders;++j) {
+            double val = 0.;
+            edit_boxes[j][i]->GetValue().ToDouble(&val);
+            output.push_back((float)val);
+        }
+    }
+    return output;
+}
+
+// Reads values from simple mode to save them for next time:
+std::vector<float> WipingPanel::read_extruders_values() {
+    std::vector<float> output;
+    for (unsigned int i=0;i<m_number_of_extruders;++i) {
+        output.push_back(m_old[i]->GetValue());
+        output.push_back(m_new[i]->GetValue());
+    }
+    return output;
+}
+
+// This updates the "advanced" matrix based on values from "simple" mode
+void WipingPanel::fill_in_matrix() {
+    for (unsigned i=0;i<m_number_of_extruders;++i) {
+        for (unsigned j=0;j<m_number_of_extruders;++j) {
+            if (i==j) continue;
+                edit_boxes[j][i]->SetValue(wxString("")<< (m_old[i]->GetValue() + m_new[j]->GetValue()));
+        }
+    }
+}
+
+
+
+// Function to check if simple and advanced settings are matching
+bool WipingPanel::advanced_matches_simple() {
+    for (unsigned i=0;i<m_number_of_extruders;++i) {
+        for (unsigned j=0;j<m_number_of_extruders;++j) {
+            if (i==j) continue;
+            if (edit_boxes[j][i]->GetValue() != (wxString("")<< (m_old[i]->GetValue() + m_new[j]->GetValue())))
+                return false;
+        }
+    }
+    return true;
+}
+
+
+// Switches the dialog from simple to advanced mode and vice versa
+void WipingPanel::toggle_advanced(bool user_action) {
+    if (m_advanced && !advanced_matches_simple() && user_action) {
+        if (wxMessageDialog(this,wxString(_(L("Switching to simple settings will discard changes done in the advanced mode!\n\nDo you want to proceed?"))),
+                            wxString(_(L("Warning"))),wxYES_NO|wxICON_EXCLAMATION).ShowModal() != wxID_YES)
+            return;
+    }
+    if (user_action)
+        m_advanced = !m_advanced;                // user demands a change -> toggle
+    else
+        m_advanced = !advanced_matches_simple(); // if called from constructor, show what is appropriate
+
+	(m_advanced ? m_page_advanced : m_page_simple)->Show();
+	(!m_advanced ? m_page_advanced : m_page_simple)->Hide();
+
+    m_widget_button->SetLabel(m_advanced ? _(L("Show simplified settings")) : _(L("Show advanced settings")));
+    if (m_advanced)
+        if (user_action) fill_in_matrix();  // otherwise keep values loaded from config
+
+   m_sizer->Layout();
+   Refresh();
+}

src/slic3r/GUI/WipeTowerDialog.hpp

@@ -0,0 +1,90 @@
+#ifndef _WIPE_TOWER_DIALOG_H_
+#define _WIPE_TOWER_DIALOG_H_
+
+#include <wx/spinctrl.h>
+#include <wx/stattext.h>
+#include <wx/textctrl.h>
+#include <wx/checkbox.h>
+#include <wx/msgdlg.h>
+
+#include "RammingChart.hpp"
+
+
+class RammingPanel : public wxPanel {
+public:
+    RammingPanel(wxWindow* parent);
+    RammingPanel(wxWindow* parent,const std::string& data);
+    std::string get_parameters();
+
+private:
+    Chart* m_chart = nullptr;
+    wxSpinCtrl* m_widget_volume = nullptr;
+    wxSpinCtrl* m_widget_ramming_line_width_multiplicator = nullptr;
+    wxSpinCtrl* m_widget_ramming_step_multiplicator = nullptr;
+    wxSpinCtrlDouble* m_widget_time = nullptr;
+    int m_ramming_step_multiplicator;
+    int m_ramming_line_width_multiplicator;
+      
+    void line_parameters_changed();
+};
+
+
+class RammingDialog : public wxDialog {
+public:
+    RammingDialog(wxWindow* parent,const std::string& parameters);    
+    std::string get_parameters() { return m_output_data; }
+private:
+    RammingPanel* m_panel_ramming = nullptr;
+    std::string m_output_data;
+};
+
+
+
+
+
+
+
+class WipingPanel : public wxPanel {
+public:
+    WipingPanel(wxWindow* parent, const std::vector<float>& matrix, const std::vector<float>& extruders, wxButton* widget_button);
+    std::vector<float> read_matrix_values();
+    std::vector<float> read_extruders_values();
+    void toggle_advanced(bool user_action = false);
+	void format_sizer(wxSizer* sizer, wxPanel* page, wxGridSizer* grid_sizer, const wxString& info, const wxString& table_title, int table_lshift=0);
+        
+private:
+    void fill_in_matrix();
+    bool advanced_matches_simple();
+        
+    std::vector<wxSpinCtrl*> m_old;
+    std::vector<wxSpinCtrl*> m_new;
+    std::vector<std::vector<wxTextCtrl*>> edit_boxes;
+    unsigned int m_number_of_extruders  = 0;
+    bool m_advanced                     = false;
+	wxPanel*	m_page_simple = nullptr;
+	wxPanel*	m_page_advanced = nullptr;
+    wxBoxSizer*	m_sizer = nullptr;
+    wxBoxSizer* m_sizer_simple = nullptr;
+    wxBoxSizer* m_sizer_advanced = nullptr;
+    wxGridSizer* m_gridsizer_advanced = nullptr;
+    wxButton* m_widget_button     = nullptr;
+};
+
+
+
+
+
+class WipingDialog : public wxDialog {
+public:
+    WipingDialog(wxWindow* parent,const std::vector<float>& matrix, const std::vector<float>& extruders);
+    std::vector<float> get_matrix() const    { return m_output_matrix; }
+    std::vector<float> get_extruders() const { return m_output_extruders; }
+
+
+private:
+    WipingPanel*  m_panel_wiping  = nullptr;
+    std::vector<float> m_output_matrix;
+    std::vector<float> m_output_extruders;
+};
+
+#endif  // _WIPE_TOWER_DIALOG_H_

src/slic3r/GUI/callback.hpp

@@ -0,0 +1,30 @@
+// I AM A PHONY PLACEHOLDER FOR THE PERL CALLBACK.
+// GET RID OF ME!
+
+#ifndef slic3r_GUI_PerlCallback_phony_hpp_
+#define slic3r_GUI_PerlCallback_phony_hpp_
+
+#include <vector>
+
+namespace Slic3r {
+
+class PerlCallback {
+public:
+    PerlCallback(void *) {}
+    PerlCallback() {}
+    void register_callback(void *) {}
+    void deregister_callback() {}
+    void call() const {}
+    void call(int) const {}
+    void call(int, int) const {}
+    void call(const std::vector<int>&) const {}
+    void call(double) const {}
+    void call(double, double) const {}
+    void call(double, double, double) const {}
+    void call(double, double, double, double) const {}
+    void call(bool b) const {}
+};
+
+} // namespace Slic3r
+
+#endif /* slic3r_GUI_PerlCallback_phony_hpp_ */

src/slic3r/GUI/wxExtensions.hpp

@@ -0,0 +1,773 @@
+#ifndef slic3r_GUI_wxExtensions_hpp_
+#define slic3r_GUI_wxExtensions_hpp_
+
+#include <wx/checklst.h>
+#include <wx/combo.h>
+#include <wx/dataview.h>
+#include <wx/dc.h>
+#include <wx/collpane.h>
+#include <wx/wupdlock.h>
+#include <wx/button.h>
+#include <wx/slider.h>
+
+#include <vector>
+#include <set>
+
+class wxCheckListBoxComboPopup : public wxCheckListBox, public wxComboPopup
+{
+    static const unsigned int DefaultWidth;
+    static const unsigned int DefaultHeight;
+    static const unsigned int DefaultItemHeight;
+
+    wxString m_text;
+
+    // Events sent on mouseclick are quite complex. Function OnListBoxSelection is supposed to pass the event to the checkbox, which works fine on
+    // Win. On OSX and Linux the events are generated differently - clicking on the checkbox square generates the event twice (and the square
+    // therefore seems not to respond).
+    // This enum is meant to save current state of affairs, i.e., if the event forwarding is ok to do or not. It is only used on Linux
+    // and OSX by some #ifdefs. It also stores information whether OnListBoxSelection is supposed to change the checkbox status,
+    // or if it changed status on its own already (which happens when the square is clicked). More comments in OnCheckListBox(...)
+    // There indeed is a better solution, maybe making a custom event used for the event passing to distinguish the original and passed message
+    // and blocking one of them on OSX and Linux. Feel free to refactor, but carefully test on all platforms.
+    enum class OnCheckListBoxFunction{
+        FreeToProceed,
+        RefuseToProceed,
+        WasRefusedLastTime
+    } m_check_box_events_status = OnCheckListBoxFunction::FreeToProceed;
+
+
+public:
+    virtual bool Create(wxWindow* parent);
+    virtual wxWindow* GetControl();
+    virtual void SetStringValue(const wxString& value);
+    virtual wxString GetStringValue() const;
+    virtual wxSize GetAdjustedSize(int minWidth, int prefHeight, int maxHeight);
+
+    virtual void OnKeyEvent(wxKeyEvent& evt);
+
+    void OnCheckListBox(wxCommandEvent& evt);
+    void OnListBoxSelection(wxCommandEvent& evt);
+};
+
+
+// ***  wxDataViewTreeCtrlComboBox  ***
+
+class wxDataViewTreeCtrlComboPopup: public wxDataViewTreeCtrl, public wxComboPopup
+{
+	static const unsigned int DefaultWidth;
+	static const unsigned int DefaultHeight;
+	static const unsigned int DefaultItemHeight;
+
+	wxString	m_text;
+	int			m_cnt_open_items{0};
+
+public:
+	virtual bool		Create(wxWindow* parent);
+	virtual wxWindow*	GetControl() { return this; }
+	virtual void		SetStringValue(const wxString& value) { m_text = value; }
+	virtual wxString	GetStringValue() const { return m_text; }
+//	virtual wxSize		GetAdjustedSize(int minWidth, int prefHeight, int maxHeight);
+
+	virtual void		OnKeyEvent(wxKeyEvent& evt);
+	void				OnDataViewTreeCtrlSelection(wxCommandEvent& evt);
+	void				SetItemsCnt(int cnt) { m_cnt_open_items = cnt; }
+};
+
+
+
+// ***  PrusaCollapsiblePane  *** 
+// ----------------------------------------------------------------------------
+class PrusaCollapsiblePane : public wxCollapsiblePane
+{
+public:
+	PrusaCollapsiblePane() {}
+	PrusaCollapsiblePane(wxWindow *parent,
+		wxWindowID winid,
+		const wxString& label,
+		const wxPoint& pos = wxDefaultPosition,
+		const wxSize& size = wxDefaultSize,
+		long style = wxCP_DEFAULT_STYLE,
+		const wxValidator& val = wxDefaultValidator,
+		const wxString& name = wxCollapsiblePaneNameStr)
+	{
+		Create(parent, winid, label, pos, size, style, val, name);
+	}
+	~PrusaCollapsiblePane() {}
+
+	void OnStateChange(const wxSize& sz); //override/hide of OnStateChange from wxCollapsiblePane
+	virtual bool Show(bool show = true) override {
+		wxCollapsiblePane::Show(show);
+		OnStateChange(GetBestSize());
+		return true;
+	}
+};
+
+
+// ***  PrusaCollapsiblePaneMSW  ***  used only #ifdef __WXMSW__
+// ----------------------------------------------------------------------------
+#ifdef __WXMSW__
+class PrusaCollapsiblePaneMSW : public PrusaCollapsiblePane//wxCollapsiblePane
+{
+	wxButton*	m_pDisclosureTriangleButton = nullptr;
+	wxBitmap	m_bmp_close;
+	wxBitmap	m_bmp_open;
+public:
+	PrusaCollapsiblePaneMSW() {}
+	PrusaCollapsiblePaneMSW(	wxWindow *parent,
+							wxWindowID winid,
+							const wxString& label,
+							const wxPoint& pos = wxDefaultPosition,
+							const wxSize& size = wxDefaultSize,
+							long style = wxCP_DEFAULT_STYLE,
+							const wxValidator& val = wxDefaultValidator,
+							const wxString& name = wxCollapsiblePaneNameStr)
+	{
+		Create(parent, winid, label, pos, size, style, val, name);
+	}
+
+	~PrusaCollapsiblePaneMSW() {}
+
+	bool Create(wxWindow *parent,
+				wxWindowID id,
+				const wxString& label,
+				const wxPoint& pos,
+				const wxSize& size,
+				long style,
+				const wxValidator& val,
+				const wxString& name);
+
+	void UpdateBtnBmp();
+	void SetLabel(const wxString &label) override;
+	bool Layout() override;
+	void Collapse(bool collapse) override;
+};
+#endif //__WXMSW__
+
+// *****************************************************************************
+
+// ----------------------------------------------------------------------------
+// PrusaDataViewBitmapText: helper class used by PrusaBitmapTextRenderer
+// ----------------------------------------------------------------------------
+
+class PrusaDataViewBitmapText : public wxObject
+{
+public:
+    PrusaDataViewBitmapText(const wxString &text = wxEmptyString,
+        const wxBitmap& bmp = wxNullBitmap) :
+        m_text(text), m_bmp(bmp)
+    { }
+
+    PrusaDataViewBitmapText(const PrusaDataViewBitmapText &other)
+        : wxObject(),
+        m_text(other.m_text),
+        m_bmp(other.m_bmp)
+    { }
+
+    void SetText(const wxString &text)      { m_text = text; }
+    wxString GetText() const                { return m_text; }
+    void SetBitmap(const wxIcon &icon)      { m_bmp = icon; }
+    const wxBitmap &GetBitmap() const       { return m_bmp; }
+
+    bool IsSameAs(const PrusaDataViewBitmapText& other) const {
+        return m_text == other.m_text && m_bmp.IsSameAs(other.m_bmp);
+    }
+
+    bool operator==(const PrusaDataViewBitmapText& other) const {
+        return IsSameAs(other);
+    }
+
+    bool operator!=(const PrusaDataViewBitmapText& other) const {
+        return !IsSameAs(other);
+    }
+
+private:
+    wxString    m_text;
+    wxBitmap    m_bmp;
+};
+DECLARE_VARIANT_OBJECT(PrusaDataViewBitmapText)
+
+
+// ----------------------------------------------------------------------------
+// PrusaObjectDataViewModelNode: a node inside PrusaObjectDataViewModel
+// ----------------------------------------------------------------------------
+
+class PrusaObjectDataViewModelNode;
+WX_DEFINE_ARRAY_PTR(PrusaObjectDataViewModelNode*, MyObjectTreeModelNodePtrArray);
+
+class PrusaObjectDataViewModelNode
+{
+	PrusaObjectDataViewModelNode*	m_parent;
+	MyObjectTreeModelNodePtrArray   m_children;
+    wxIcon                          m_empty_icon;
+    wxBitmap                        m_empty_bmp;
+    std::vector< std::string >      m_opt_categories;
+public:
+	PrusaObjectDataViewModelNode(const wxString &name, const int instances_count=1) {
+		m_parent	= NULL;
+		m_name		= name;
+		m_copy		= wxString::Format("%d", instances_count);
+		m_type		= "object";
+		m_volume_id	= -1;
+#ifdef __WXGTK__
+        // it's necessary on GTK because of control have to know if this item will be container
+        // in another case you couldn't to add subitem for this item
+        // it will be produce "segmentation fault"
+        m_container = true;
+#endif  //__WXGTK__
+		set_object_action_icon();
+	}
+
+	PrusaObjectDataViewModelNode(	PrusaObjectDataViewModelNode* parent,
+									const wxString& sub_obj_name, 
+									const wxBitmap& bmp, 
+                                    const wxString& extruder, 
+									const int volume_id=-1) {
+		m_parent	= parent;
+		m_name		= sub_obj_name;
+		m_copy		= wxEmptyString;
+		m_bmp		= bmp;
+		m_type		= "volume";
+		m_volume_id = volume_id;
+        m_extruder = extruder;
+#ifdef __WXGTK__
+        // it's necessary on GTK because of control have to know if this item will be container
+        // in another case you couldn't to add subitem for this item
+        // it will be produce "segmentation fault"
+        m_container = true;
+#endif  //__WXGTK__
+		set_part_action_icon();
+    }
+
+    PrusaObjectDataViewModelNode(   PrusaObjectDataViewModelNode* parent) :
+                                    m_parent(parent),
+                                    m_name("Settings to modified"),
+                                    m_copy(wxEmptyString),
+                                    m_type("settings"),
+                                    m_extruder(wxEmptyString) {}
+
+	~PrusaObjectDataViewModelNode()
+	{
+		// free all our children nodes
+		size_t count = m_children.GetCount();
+		for (size_t i = 0; i < count; i++)
+		{
+			PrusaObjectDataViewModelNode *child = m_children[i];
+			delete child;
+		}
+	}
+	
+	wxString				m_name;
+	wxIcon&					m_icon = m_empty_icon;
+    wxBitmap&               m_bmp = m_empty_bmp;
+	wxString				m_copy;
+	std::string				m_type;
+	int						m_volume_id = -2;
+	bool					m_container = false;
+	wxString				m_extruder = "default";
+	wxBitmap				m_action_icon;
+
+	bool IsContainer() const
+	{
+		return m_container;
+	}
+
+	PrusaObjectDataViewModelNode* GetParent()
+	{
+		return m_parent;
+	}
+	MyObjectTreeModelNodePtrArray& GetChildren()
+	{
+		return m_children;
+	}
+	PrusaObjectDataViewModelNode* GetNthChild(unsigned int n)
+	{
+		return m_children.Item(n);
+	}
+	void Insert(PrusaObjectDataViewModelNode* child, unsigned int n)
+	{
+		if (!m_container)
+			m_container = true;
+		m_children.Insert(child, n);
+	}
+	void Append(PrusaObjectDataViewModelNode* child)
+	{
+		if (!m_container)
+			m_container = true;
+		m_children.Add(child);
+	}
+	void RemoveAllChildren()
+	{
+		if (GetChildCount() == 0)
+			return;
+		for (size_t id = GetChildCount() - 1; id >= 0; --id)
+		{
+			if (m_children.Item(id)->GetChildCount() > 0)
+				m_children[id]->RemoveAllChildren();
+			auto node = m_children[id];
+			m_children.RemoveAt(id);
+			delete node;
+		}
+	}
+
+	size_t GetChildCount() const
+	{
+		return m_children.GetCount();
+	}
+
+	bool SetValue(const wxVariant &variant, unsigned int col)
+	{
+		switch (col)
+		{
+		case 0:{
+            PrusaDataViewBitmapText data;
+			data << variant;
+            m_bmp = data.GetBitmap();
+			m_name = data.GetText();
+			return true;}
+		case 1:
+			m_copy = variant.GetString();
+			return true;
+		case 2:
+			m_extruder = variant.GetString();
+			return true;
+		case 3:
+			m_action_icon << variant;
+			return true;
+		default:
+			printf("MyObjectTreeModel::SetValue: wrong column");
+		}
+		return false;
+	}
+	void SetIcon(const wxIcon &icon)
+	{
+		m_icon = icon;
+	}
+
+	void SetBitmap(const wxBitmap &icon)
+	{
+		m_bmp = icon;
+	}
+	
+	void SetType(const std::string& type){
+		m_type = type;
+	}	
+	const std::string& GetType(){
+		return m_type;
+	}
+
+	void SetVolumeId(const int& volume_id){
+		m_volume_id = volume_id;
+	}
+	const int& GetVolumeId(){
+		return m_volume_id;
+	}
+
+	// use this function only for childrens
+	void AssignAllVal(PrusaObjectDataViewModelNode& from_node)
+	{
+		// ! Don't overwrite other values because of equality of this values for all children --
+		m_name = from_node.m_name;
+		m_icon = from_node.m_icon;
+		m_volume_id = from_node.m_volume_id;
+		m_extruder = from_node.m_extruder;
+	}
+
+	bool SwapChildrens(int frst_id, int scnd_id) {
+		if (GetChildCount() < 2 || 
+			frst_id < 0 || frst_id >= GetChildCount() || 
+			scnd_id < 0 || scnd_id >= GetChildCount())
+			return false;
+
+		PrusaObjectDataViewModelNode new_scnd = *GetNthChild(frst_id);
+		PrusaObjectDataViewModelNode new_frst = *GetNthChild(scnd_id);
+
+		new_scnd.m_volume_id = m_children.Item(scnd_id)->m_volume_id;
+		new_frst.m_volume_id = m_children.Item(frst_id)->m_volume_id;
+
+		m_children.Item(frst_id)->AssignAllVal(new_frst);
+		m_children.Item(scnd_id)->AssignAllVal(new_scnd);
+		return true;
+	}
+
+	// Set action icons for node
+	void set_object_action_icon();
+	void set_part_action_icon();
+    bool update_settings_digest(const std::vector<std::string>& categories);
+};
+
+// ----------------------------------------------------------------------------
+// PrusaObjectDataViewModel
+// ----------------------------------------------------------------------------
+
+class PrusaObjectDataViewModel :public wxDataViewModel
+{
+	std::vector<PrusaObjectDataViewModelNode*> m_objects;
+public:
+    PrusaObjectDataViewModel();
+    ~PrusaObjectDataViewModel();
+
+	wxDataViewItem Add(const wxString &name);
+	wxDataViewItem Add(const wxString &name, const int instances_count);
+	wxDataViewItem AddChild(const wxDataViewItem &parent_item, 
+							const wxString &name, 
+                            const wxBitmap& icon,
+                            const int extruder = 0,
+                            const bool create_frst_child = true);
+	wxDataViewItem AddSettingsChild(const wxDataViewItem &parent_item);
+	wxDataViewItem Delete(const wxDataViewItem &item);
+	void DeleteAll();
+    void DeleteChildren(wxDataViewItem& parent);
+	wxDataViewItem GetItemById(int obj_idx);
+	wxDataViewItem GetItemByVolumeId(int obj_idx, int volume_idx);
+	int GetIdByItem(wxDataViewItem& item);
+	int GetVolumeIdByItem(const wxDataViewItem& item);
+	bool IsEmpty() { return m_objects.empty(); }
+
+	// helper method for wxLog
+
+	wxString GetName(const wxDataViewItem &item) const;
+	wxString GetCopy(const wxDataViewItem &item) const;
+	wxIcon&  GetIcon(const wxDataViewItem &item) const;
+    wxBitmap& GetBitmap(const wxDataViewItem &item) const;
+
+	// helper methods to change the model
+
+	virtual unsigned int GetColumnCount() const override { return 3;}
+	virtual wxString GetColumnType(unsigned int col) const override{ return wxT("string"); }
+
+	virtual void GetValue(wxVariant &variant,
+		const wxDataViewItem &item, unsigned int col) const override;
+	virtual bool SetValue(const wxVariant &variant,
+		const wxDataViewItem &item, unsigned int col) override;
+	bool SetValue(const wxVariant &variant, const int item_idx, unsigned int col);
+
+	wxDataViewItem MoveChildUp(const wxDataViewItem &item);
+	wxDataViewItem MoveChildDown(const wxDataViewItem &item);
+    // For parent move child from cur_volume_id place to new_volume_id 
+    // Remaining items will moved up/down accordingly
+    wxDataViewItem ReorganizeChildren(int cur_volume_id, 
+                                      int new_volume_id,
+                                      const wxDataViewItem &parent);
+
+	virtual bool IsEnabled(const wxDataViewItem &item, unsigned int col) const override;
+
+	virtual wxDataViewItem GetParent(const wxDataViewItem &item) const override;
+	virtual bool IsContainer(const wxDataViewItem &item) const override;
+	virtual unsigned int GetChildren(const wxDataViewItem &parent,
+		wxDataViewItemArray &array) const override;
+
+	// Is the container just a header or an item with all columns
+	// In our case it is an item with all columns 
+	virtual bool HasContainerColumns(const wxDataViewItem& WXUNUSED(item)) const override {	return true; }
+
+    wxDataViewItem    HasSettings(const wxDataViewItem &item) const;
+    bool    IsSettingsItem(const wxDataViewItem &item) const;
+    void    UpdateSettingsDigest(const wxDataViewItem &item, const std::vector<std::string>& categories);
+};
+
+// ----------------------------------------------------------------------------
+// PrusaBitmapTextRenderer
+// ----------------------------------------------------------------------------
+
+class PrusaBitmapTextRenderer : public wxDataViewCustomRenderer
+{
+public:
+    PrusaBitmapTextRenderer(  wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
+                            int align = wxDVR_DEFAULT_ALIGNMENT): 
+                            wxDataViewCustomRenderer(wxT("wxObject"), mode, align) {}
+
+    bool SetValue(const wxVariant &value);
+    bool GetValue(wxVariant &value) const;
+
+    virtual bool Render(wxRect cell, wxDC *dc, int state);
+    virtual wxSize GetSize() const;
+
+    virtual bool HasEditorCtrl() const { return false; }
+
+private:
+//      wxDataViewIconText   m_value;
+    PrusaDataViewBitmapText m_value;
+};
+
+
+// ----------------------------------------------------------------------------
+// MyCustomRenderer
+// ----------------------------------------------------------------------------
+
+class MyCustomRenderer : public wxDataViewCustomRenderer
+{
+public:
+	// This renderer can be either activatable or editable, for demonstration
+	// purposes. In real programs, you should select whether the user should be
+	// able to activate or edit the cell and it doesn't make sense to switch
+	// between the two -- but this is just an example, so it doesn't stop us.
+	explicit MyCustomRenderer(wxDataViewCellMode mode)
+		: wxDataViewCustomRenderer("string", mode, wxALIGN_CENTER)
+	{ }
+
+	virtual bool Render(wxRect rect, wxDC *dc, int state) override/*wxOVERRIDE*/
+	{
+		dc->SetBrush(*wxLIGHT_GREY_BRUSH);
+		dc->SetPen(*wxTRANSPARENT_PEN);
+
+		rect.Deflate(2);
+		dc->DrawRoundedRectangle(rect, 5);
+
+		RenderText(m_value,
+			0, // no offset
+			wxRect(dc->GetTextExtent(m_value)).CentreIn(rect),
+			dc,
+			state);
+		return true;
+	}
+
+		virtual bool ActivateCell(const wxRect& WXUNUSED(cell),
+		wxDataViewModel *WXUNUSED(model),
+		const wxDataViewItem &WXUNUSED(item),
+		unsigned int WXUNUSED(col),
+		const wxMouseEvent *mouseEvent) override/*wxOVERRIDE*/
+	{
+		wxString position;
+		if (mouseEvent)
+			position = wxString::Format("via mouse at %d, %d", mouseEvent->m_x, mouseEvent->m_y);
+		else
+			position = "from keyboard";
+//		wxLogMessage("MyCustomRenderer ActivateCell() %s", position);
+		return false;
+	}
+
+		virtual wxSize GetSize() const override/*wxOVERRIDE*/
+	{
+		return wxSize(60, 20);
+	}
+
+		virtual bool SetValue(const wxVariant &value) override/*wxOVERRIDE*/
+	{
+		m_value = value.GetString();
+		return true;
+	}
+
+		virtual bool GetValue(wxVariant &WXUNUSED(value)) const override/*wxOVERRIDE*/{ return true; }
+
+		virtual bool HasEditorCtrl() const override/*wxOVERRIDE*/{ return true; }
+
+		virtual wxWindow*
+		CreateEditorCtrl(wxWindow* parent,
+		wxRect labelRect,
+		const wxVariant& value) override/*wxOVERRIDE*/
+	{
+		wxTextCtrl* text = new wxTextCtrl(parent, wxID_ANY, value,
+		labelRect.GetPosition(),
+		labelRect.GetSize(),
+		wxTE_PROCESS_ENTER);
+		text->SetInsertionPointEnd();
+
+		return text;
+	}
+
+		virtual bool
+			GetValueFromEditorCtrl(wxWindow* ctrl, wxVariant& value) override/*wxOVERRIDE*/
+	{
+		wxTextCtrl* text = wxDynamicCast(ctrl, wxTextCtrl);
+		if (!text)
+			return false;
+
+		value = text->GetValue();
+
+		return true;
+	}
+
+private:
+	wxString m_value;
+};
+
+
+// ----------------------------------------------------------------------------
+// PrusaDoubleSlider
+// ----------------------------------------------------------------------------
+
+enum SelectedSlider {
+    ssUndef,
+    ssLower,
+    ssHigher
+};
+enum TicksAction{
+    taOnIcon,
+    taAdd,
+    taDel
+};
+class PrusaDoubleSlider : public wxControl
+{
+public:
+    PrusaDoubleSlider(
+        wxWindow *parent,
+        wxWindowID id,
+        int lowerValue, 
+        int higherValue, 
+        int minValue, 
+        int maxValue,
+        const wxPoint& pos = wxDefaultPosition,
+        const wxSize& size = wxDefaultSize,
+        long style = wxSL_VERTICAL,
+        const wxValidator& val = wxDefaultValidator,
+        const wxString& name = wxEmptyString);
+    ~PrusaDoubleSlider(){}
+
+    int GetLowerValue() const {
+        return m_lower_value;
+    }
+    int GetHigherValue() const {
+        return m_higher_value;
+    }
+    int GetActiveValue() const;
+    double GetLowerValueD()  const { return get_double_value(ssLower); }
+    double GetHigherValueD() const { return get_double_value(ssHigher); }
+    wxSize DoGetBestSize() const override;
+    void SetLowerValue(const int lower_val);
+    void SetHigherValue(const int higher_val);
+    void SetMaxValue(const int max_value);
+    void SetKoefForLabels(const double koef) {
+        m_label_koef = koef;
+    }
+    void SetSliderValues(const std::vector<std::pair<int, double>>& values) {
+        m_values = values;
+    }
+    void ChangeOneLayerLock();
+
+    void OnPaint(wxPaintEvent& ){ render();}
+    void OnLeftDown(wxMouseEvent& event);
+    void OnMotion(wxMouseEvent& event);
+    void OnLeftUp(wxMouseEvent& event);
+    void OnEnterWin(wxMouseEvent& event){ enter_window(event, true); }
+    void OnLeaveWin(wxMouseEvent& event){ enter_window(event, false); }
+    void OnWheel(wxMouseEvent& event);
+    void OnKeyDown(wxKeyEvent &event);
+    void OnKeyUp(wxKeyEvent &event);
+    void OnRightDown(wxMouseEvent& event);
+    void OnRightUp(wxMouseEvent& event);
+
+protected:
+ 
+    void    render();
+    void    draw_focus_rect();
+    void    draw_action_icon(wxDC& dc, const wxPoint pt_beg, const wxPoint pt_end);
+    void    draw_scroll_line(wxDC& dc, const int lower_pos, const int higher_pos);
+    void    draw_thumb(wxDC& dc, const wxCoord& pos_coord, const SelectedSlider& selection);
+    void    draw_thumbs(wxDC& dc, const wxCoord& lower_pos, const wxCoord& higher_pos);
+    void    draw_ticks(wxDC& dc);
+    void    draw_one_layer_icon(wxDC& dc);
+    void    draw_thumb_item(wxDC& dc, const wxPoint& pos, const SelectedSlider& selection);
+    void    draw_info_line_with_icon(wxDC& dc, const wxPoint& pos, SelectedSlider selection);
+    void    draw_thumb_text(wxDC& dc, const wxPoint& pos, const SelectedSlider& selection) const;
+
+    void    update_thumb_rect(const wxCoord& begin_x, const wxCoord& begin_y, const SelectedSlider& selection);
+    void    detect_selected_slider(const wxPoint& pt, const bool is_mouse_wheel = false);
+    void    correct_lower_value();
+    void    correct_higher_value();
+    void    move_current_thumb(const bool condition);
+    void    action_tick(const TicksAction action);
+    void    enter_window(wxMouseEvent& event, const bool enter);
+
+    bool    is_point_in_rect(const wxPoint& pt, const wxRect& rect);
+    bool    is_horizontal() const { return m_style == wxSL_HORIZONTAL; }
+
+    double      get_scroll_step();
+    wxString    get_label(const SelectedSlider& selection) const;
+    void        get_lower_and_higher_position(int& lower_pos, int& higher_pos);
+    int         get_value_from_position(const wxCoord x, const wxCoord y);
+    wxCoord     get_position_from_value(const int value);
+    wxSize      get_size();
+    void        get_size(int *w, int *h);
+    double      get_double_value(const SelectedSlider& selection) const;
+
+private:
+    int         m_min_value;
+    int         m_max_value;
+    int         m_lower_value;
+    int         m_higher_value;
+    wxBitmap    m_bmp_thumb_higher;
+    wxBitmap    m_bmp_thumb_lower;
+    wxBitmap    m_bmp_add_tick_on;
+    wxBitmap    m_bmp_add_tick_off;
+    wxBitmap    m_bmp_del_tick_on;
+    wxBitmap    m_bmp_del_tick_off;
+    wxBitmap    m_bmp_one_layer_lock_on;
+    wxBitmap    m_bmp_one_layer_lock_off;
+    wxBitmap    m_bmp_one_layer_unlock_on;
+    wxBitmap    m_bmp_one_layer_unlock_off;
+    SelectedSlider  m_selection;
+    bool        m_is_left_down = false;
+    bool        m_is_right_down = false;
+    bool        m_is_one_layer = false;
+    bool        m_is_focused = false;
+    bool        m_is_action_icon_focesed = false;
+    bool        m_is_one_layer_icon_focesed = false;
+
+    wxRect      m_rect_lower_thumb;
+    wxRect      m_rect_higher_thumb;
+    wxRect      m_rect_tick_action;
+    wxRect      m_rect_one_layer_icon;
+    wxSize      m_thumb_size;
+    int         m_tick_icon_dim;
+    int         m_lock_icon_dim;
+    long        m_style;
+    float       m_label_koef = 1.0;
+
+// control's view variables
+    wxCoord SLIDER_MARGIN; // margin around slider
+
+    wxPen   DARK_ORANGE_PEN;
+    wxPen   ORANGE_PEN;
+    wxPen   LIGHT_ORANGE_PEN;
+
+    wxPen   DARK_GREY_PEN;
+    wxPen   GREY_PEN;
+    wxPen   LIGHT_GREY_PEN;
+
+    std::vector<wxPen*> line_pens;
+    std::vector<wxPen*> segm_pens;
+    std::set<int>       m_ticks;
+    std::vector<std::pair<int,double>> m_values;
+};
+
+
+// ----------------------------------------------------------------------------
+// PrusaLockButton
+// ----------------------------------------------------------------------------
+
+class PrusaLockButton : public wxButton
+{
+public:
+    PrusaLockButton(
+        wxWindow *parent,
+        wxWindowID id,
+        const wxPoint& pos = wxDefaultPosition,
+        const wxSize& size = wxDefaultSize);
+    ~PrusaLockButton(){}
+
+    void    OnButton(wxCommandEvent& event);
+    void    OnEnterBtn(wxMouseEvent& event){ enter_button(true); event.Skip(); }
+    void    OnLeaveBtn(wxMouseEvent& event){ enter_button(false); event.Skip(); }
+
+    bool    IsLocked() const { return m_is_pushed; }
+
+protected:
+    void    enter_button(const bool enter);
+
+private:
+    bool        m_is_pushed = false;
+
+    wxBitmap    m_bmp_lock_on;
+    wxBitmap    m_bmp_lock_off;
+    wxBitmap    m_bmp_unlock_on;
+    wxBitmap    m_bmp_unlock_off;
+
+    int         m_lock_icon_dim;
+};
+
+
+// ******************************* EXPERIMENTS **********************************************
+// ******************************************************************************************
+
+
+#endif // slic3r_GUI_wxExtensions_hpp_

src/slic3r/GUI/wxinit.h

@@ -0,0 +1,25 @@
+#ifndef slic3r_wxinit_hpp_
+#define slic3r_wxinit_hpp_
+
+#include <wx/wx.h>
+#include <wx/intl.h>
+#include <wx/html/htmlwin.h>
+
+// Perl redefines a _ macro, so we undef this one
+#undef _
+
+// We do want to use translation however, so define it as __ so we can do a find/replace
+// later when we no longer need to undef _
+#define __(s)                     wxGetTranslation((s))
+
+// legacy macros
+// https://wiki.wxwidgets.org/EventTypes_and_Event-Table_Macros
+#ifndef wxEVT_BUTTON
+#define wxEVT_BUTTON wxEVT_COMMAND_BUTTON_CLICKED
+#endif
+
+#ifndef wxEVT_HTML_LINK_CLICKED
+#define wxEVT_HTML_LINK_CLICKED wxEVT_COMMAND_HTML_LINK_CLICKED
+#endif
+
+#endif

src/slic3r/Utils/ASCIIFolding.hpp

@@ -0,0 +1,15 @@
+#ifndef slic3r_ASCIIFolding_hpp_
+#define slic3r_ASCIIFolding_hpp_
+
+#include <string>
+
+namespace Slic3r {
+
+// If possible, remove accents from accented latin characters.
+// This function is useful for generating file names to be processed by legacy firmwares.
+extern std::string fold_utf8_to_ascii(const char *src);
+extern std::string fold_utf8_to_ascii(const std::string &src);
+
+}; // namespace Slic3r
+
+#endif /* slic3r_ASCIIFolding_hpp_ */

src/slic3r/Utils/Bonjour.cpp

@@ -0,0 +1,781 @@
+#include "Bonjour.hpp"
+
+#include <cstdint>
+#include <algorithm>
+#include <array>
+#include <vector>
+#include <string>
+#include <random>
+#include <thread>
+#include <boost/optional.hpp>
+#include <boost/system/error_code.hpp>
+#include <boost/endian/conversion.hpp>
+#include <boost/asio.hpp>
+#include <boost/date_time/posix_time/posix_time_duration.hpp>
+#include <boost/format.hpp>
+
+using boost::optional;
+using boost::system::error_code;
+namespace endian = boost::endian;
+namespace asio = boost::asio;
+using boost::asio::ip::udp;
+
+
+namespace Slic3r {
+
+
+// Minimal implementation of a MDNS/DNS-SD client
+// This implementation is extremely simple, only the bits that are useful
+// for basic MDNS discovery of OctoPi devices are present.
+// However, the bits that are present are implemented with security in mind.
+// Only fully correct DNS replies are allowed through.
+// While decoding the decoder will bail the moment it encounters anything fishy.
+// At least that's the idea. To help prove this is actually the case,
+// the implementations has been tested with AFL.
+
+
+struct DnsName: public std::string
+{
+	enum
+	{
+		MAX_RECURSION = 10,     // Keep this low
+	};
+
+	static optional<DnsName> decode(const std::vector<char> &buffer, size_t &offset, unsigned depth = 0)
+	{
+		// Check offset sanity:
+		if (offset + 1 >= buffer.size()) {
+			return boost::none;
+		}
+
+		// Check for recursion depth to prevent parsing names that are nested too deeply or end up cyclic:
+		if (depth >= MAX_RECURSION) {
+			return boost::none;
+		}
+
+		DnsName res;
+		const size_t bsize = buffer.size();
+
+		while (true) {
+			const char* ptr = buffer.data() + offset;
+			unsigned len = static_cast<unsigned char>(*ptr);
+			if (len & 0xc0) {
+				// This is a recursive label
+				unsigned len_2 = static_cast<unsigned char>(ptr[1]);
+				size_t pointer = (len & 0x3f) << 8 | len_2;
+				const auto nested = decode(buffer, pointer, depth + 1);
+				if (!nested) {
+					return boost::none;
+				} else {
+					if (res.size() > 0) {
+						res.push_back('.');
+					}
+					res.append(*nested);
+					offset += 2;
+					return std::move(res);
+				}
+			} else if (len == 0) {
+				// This is a name terminator
+				offset++;
+				break;
+			} else {
+				// This is a regular label
+				len &= 0x3f;
+				if (len + offset + 1 >= bsize) {
+					return boost::none;
+				}
+
+				res.reserve(len);
+				if (res.size() > 0) {
+					res.push_back('.');
+				}
+
+				ptr++;
+				for (const auto end = ptr + len; ptr < end; ptr++) {
+					char c = *ptr;
+					if (c >= 0x20 && c <= 0x7f) {
+						res.push_back(c);
+					} else {
+						return boost::none;
+					}
+				}
+
+				offset += len + 1;
+			}
+		}
+
+		if (res.size() > 0) {
+			return std::move(res);
+		} else {
+			return boost::none;
+		}
+	}
+};
+
+struct DnsHeader
+{
+	uint16_t id;
+	uint16_t flags;
+	uint16_t qdcount;
+	uint16_t ancount;
+	uint16_t nscount;
+	uint16_t arcount;
+
+	enum
+	{
+		SIZE = 12,
+	};
+
+	static DnsHeader decode(const std::vector<char> &buffer) {
+		DnsHeader res;
+		const uint16_t *data_16 = reinterpret_cast<const uint16_t*>(buffer.data());
+		res.id = endian::big_to_native(data_16[0]);
+		res.flags = endian::big_to_native(data_16[1]);
+		res.qdcount = endian::big_to_native(data_16[2]);
+		res.ancount = endian::big_to_native(data_16[3]);
+		res.nscount = endian::big_to_native(data_16[4]);
+		res.arcount = endian::big_to_native(data_16[5]);
+		return res;
+	}
+
+	uint32_t rrcount() const {
+		return ancount + nscount + arcount;
+	}
+};
+
+struct DnsQuestion
+{
+	enum
+	{
+		MIN_SIZE = 5,
+	};
+
+	DnsName name;
+	uint16_t type;
+	uint16_t qclass;
+
+	DnsQuestion() :
+		type(0),
+		qclass(0)
+	{}
+
+	static optional<DnsQuestion> decode(const std::vector<char> &buffer, size_t &offset)
+	{
+		auto qname = DnsName::decode(buffer, offset);
+		if (!qname) {
+			return boost::none;
+		}
+
+		DnsQuestion res;
+		res.name = std::move(*qname);
+		const uint16_t *data_16 = reinterpret_cast<const uint16_t*>(buffer.data() + offset);
+		res.type = endian::big_to_native(data_16[0]);
+		res.qclass = endian::big_to_native(data_16[1]);
+
+		offset += 4;
+		return std::move(res);
+	}
+};
+
+struct DnsResource
+{
+	DnsName name;
+	uint16_t type;
+	uint16_t rclass;
+	uint32_t ttl;
+	std::vector<char> data;
+
+	DnsResource() :
+		type(0),
+		rclass(0),
+		ttl(0)
+	{}
+
+	static optional<DnsResource> decode(const std::vector<char> &buffer, size_t &offset, size_t &dataoffset)
+	{
+		const size_t bsize = buffer.size();
+		if (offset + 1 >= bsize) {
+			return boost::none;
+		}
+
+		auto rname = DnsName::decode(buffer, offset);
+		if (!rname) {
+			return boost::none;
+		}
+
+		if (offset + 10 >= bsize) {
+			return boost::none;
+		}
+
+		DnsResource res;
+		res.name = std::move(*rname);
+		const uint16_t *data_16 = reinterpret_cast<const uint16_t*>(buffer.data() + offset);
+		res.type = endian::big_to_native(data_16[0]);
+		res.rclass = endian::big_to_native(data_16[1]);
+		res.ttl = endian::big_to_native(*reinterpret_cast<const uint32_t*>(data_16 + 2));
+		uint16_t rdlength = endian::big_to_native(data_16[4]);
+
+		offset += 10;
+		if (offset + rdlength > bsize) {
+			return boost::none;
+		}
+
+		dataoffset = offset;
+		res.data = std::move(std::vector<char>(buffer.begin() + offset, buffer.begin() + offset + rdlength));
+		offset += rdlength;
+
+		return std::move(res);
+	}
+};
+
+struct DnsRR_A
+{
+	enum { TAG = 0x1 };
+
+	asio::ip::address_v4 ip;
+
+	static void decode(optional<DnsRR_A> &result, const DnsResource &rr)
+	{
+		if (rr.data.size() == 4) {
+			DnsRR_A res;
+			const uint32_t ip = endian::big_to_native(*reinterpret_cast<const uint32_t*>(rr.data.data()));
+			res.ip = asio::ip::address_v4(ip);
+			result = std::move(res);
+		}
+	}
+};
+
+struct DnsRR_AAAA
+{
+	enum { TAG = 0x1c };
+
+	asio::ip::address_v6 ip;
+
+	static void decode(optional<DnsRR_AAAA> &result, const DnsResource &rr)
+	{
+		if (rr.data.size() == 16) {
+			DnsRR_AAAA res;
+			std::array<unsigned char, 16> ip;
+			std::copy_n(rr.data.begin(), 16, ip.begin());
+			res.ip = asio::ip::address_v6(ip);
+			result = std::move(res);
+		}
+	}
+};
+
+struct DnsRR_SRV
+{
+	enum
+	{
+		TAG = 0x21,
+		MIN_SIZE = 8,
+	};
+
+	uint16_t priority;
+	uint16_t weight;
+	uint16_t port;
+	DnsName hostname;
+
+	static optional<DnsRR_SRV> decode(const std::vector<char> &buffer, const DnsResource &rr, size_t dataoffset)
+	{
+		if (rr.data.size() < MIN_SIZE) {
+			return boost::none;
+		}
+
+		DnsRR_SRV res;
+
+		const uint16_t *data_16 = reinterpret_cast<const uint16_t*>(rr.data.data());
+		res.priority = endian::big_to_native(data_16[0]);
+		res.weight = endian::big_to_native(data_16[1]);
+		res.port = endian::big_to_native(data_16[2]);
+
+		size_t offset = dataoffset + 6;
+		auto hostname = DnsName::decode(buffer, offset);
+
+		if (hostname) {
+			res.hostname = std::move(*hostname);
+			return std::move(res);
+		} else {
+			return boost::none;
+		}
+	}
+};
+
+struct DnsRR_TXT
+{
+	enum
+	{
+		TAG = 0x10,
+	};
+
+	std::vector<std::string> values;
+
+	static optional<DnsRR_TXT> decode(const DnsResource &rr)
+	{
+		const size_t size = rr.data.size();
+		if (size < 2) {
+			return boost::none;
+		}
+
+		DnsRR_TXT res;
+
+		for (auto it = rr.data.begin(); it != rr.data.end(); ) {
+			unsigned val_size = static_cast<unsigned char>(*it);
+			if (val_size == 0 || it + val_size >= rr.data.end()) {
+				return boost::none;
+			}
+			++it;
+
+			std::string value(val_size, ' ');
+			std::copy(it, it + val_size, value.begin());
+			res.values.push_back(std::move(value));
+
+			it += val_size;
+		}
+
+		return std::move(res);
+	}
+};
+
+struct DnsSDPair
+{
+	optional<DnsRR_SRV> srv;
+	optional<DnsRR_TXT> txt;
+};
+
+struct DnsSDMap : public std::map<std::string, DnsSDPair>
+{
+	void insert_srv(std::string &&name, DnsRR_SRV &&srv)
+	{
+		auto hit = this->find(name);
+		if (hit != this->end()) {
+			hit->second.srv = std::move(srv);
+		} else {
+			DnsSDPair pair;
+			pair.srv = std::move(srv);
+			this->insert(std::make_pair(std::move(name), std::move(pair)));
+		}
+	}
+
+	void insert_txt(std::string &&name, DnsRR_TXT &&txt)
+	{
+		auto hit = this->find(name);
+		if (hit != this->end()) {
+			hit->second.txt = std::move(txt);
+		} else {
+			DnsSDPair pair;
+			pair.txt = std::move(txt);
+			this->insert(std::make_pair(std::move(name), std::move(pair)));
+		}
+	}
+};
+
+struct DnsMessage
+{
+	enum
+	{
+		MAX_SIZE = 4096,
+		MAX_ANS = 30,
+	};
+
+	DnsHeader header;
+	optional<DnsQuestion> question;
+
+	optional<DnsRR_A> rr_a;
+	optional<DnsRR_AAAA> rr_aaaa;
+	std::vector<DnsRR_SRV> rr_srv;
+
+	DnsSDMap sdmap;
+
+	static optional<DnsMessage> decode(const std::vector<char> &buffer, optional<uint16_t> id_wanted = boost::none)
+	{
+		const auto size = buffer.size();
+		if (size < DnsHeader::SIZE + DnsQuestion::MIN_SIZE || size > MAX_SIZE) {
+			return boost::none;
+		}
+
+		DnsMessage res;
+		res.header = DnsHeader::decode(buffer);
+
+		if (id_wanted && *id_wanted != res.header.id) {
+			return boost::none;
+		}
+
+		if (res.header.qdcount > 1 || res.header.ancount > MAX_ANS) {
+			return boost::none;
+		}
+
+		size_t offset = DnsHeader::SIZE;
+		if (res.header.qdcount == 1) {
+			res.question = DnsQuestion::decode(buffer, offset);
+		}
+
+		for (unsigned i = 0; i < res.header.rrcount(); i++) {
+			size_t dataoffset = 0;
+			auto rr = DnsResource::decode(buffer, offset, dataoffset);
+			if (!rr) {
+				return boost::none;
+			} else {
+				res.parse_rr(buffer, std::move(*rr), dataoffset);
+			}
+		}
+
+		return std::move(res);
+	}
+private:
+	void parse_rr(const std::vector<char> &buffer, DnsResource &&rr, size_t dataoffset)
+	{
+		switch (rr.type) {
+			case DnsRR_A::TAG: DnsRR_A::decode(this->rr_a, rr); break;
+			case DnsRR_AAAA::TAG: DnsRR_AAAA::decode(this->rr_aaaa, rr); break;
+			case DnsRR_SRV::TAG: {
+				auto srv = DnsRR_SRV::decode(buffer, rr, dataoffset);
+				if (srv) { this->sdmap.insert_srv(std::move(rr.name), std::move(*srv)); }
+				break;
+			}
+			case DnsRR_TXT::TAG: {
+				auto txt = DnsRR_TXT::decode(rr);
+				if (txt) { this->sdmap.insert_txt(std::move(rr.name), std::move(*txt)); }
+				break;
+			}
+		}
+	}
+};
+
+std::ostream& operator<<(std::ostream &os, const DnsMessage &msg)
+{
+	os << "DnsMessage(ID: " << msg.header.id << ", "
+		<< "Q: " << (msg.question ? msg.question->name.c_str() : "none") << ", "
+		<< "A: " << (msg.rr_a ? msg.rr_a->ip.to_string() : "none") << ", "
+		<< "AAAA: " << (msg.rr_aaaa ? msg.rr_aaaa->ip.to_string() : "none") << ", "
+		<< "services: [";
+
+		enum { SRV_PRINT_MAX = 3 };
+		unsigned i = 0;
+		for (const auto &sdpair : msg.sdmap) {
+			os << sdpair.first << ", ";
+
+			if (++i >= SRV_PRINT_MAX) {
+				os << "...";
+				break;
+			}
+		}
+
+		os << "])";
+
+	return os;
+}
+
+
+struct BonjourRequest
+{
+	static const asio::ip::address_v4 MCAST_IP4;
+	static const uint16_t MCAST_PORT;
+
+	uint16_t id;
+	std::vector<char> data;
+
+	static optional<BonjourRequest> make(const std::string &service, const std::string &protocol);
+
+private:
+	BonjourRequest(uint16_t id, std::vector<char> &&data) :
+		id(id),
+		data(std::move(data))
+	{}
+};
+
+const asio::ip::address_v4 BonjourRequest::MCAST_IP4{0xe00000fb};
+const uint16_t BonjourRequest::MCAST_PORT = 5353;
+
+optional<BonjourRequest> BonjourRequest::make(const std::string &service, const std::string &protocol)
+{
+	if (service.size() > 15 || protocol.size() > 15) {
+		return boost::none;
+	}
+
+	std::random_device dev;
+	std::uniform_int_distribution<uint16_t> dist;
+	uint16_t id = dist(dev);
+	uint16_t id_big = endian::native_to_big(id);
+	const char *id_char = reinterpret_cast<char*>(&id_big);
+
+	std::vector<char> data;
+	data.reserve(service.size() + 18);
+
+	// Add the transaction ID
+	data.push_back(id_char[0]);
+	data.push_back(id_char[1]);
+
+	// Add metadata
+	static const unsigned char rq_meta[] = {
+		0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+	};
+	std::copy(rq_meta, rq_meta + sizeof(rq_meta), std::back_inserter(data));
+
+	// Add PTR query name
+	data.push_back(service.size() + 1);
+	data.push_back('_');
+	data.insert(data.end(), service.begin(), service.end());
+	data.push_back(protocol.size() + 1);
+	data.push_back('_');
+	data.insert(data.end(), protocol.begin(), protocol.end());
+
+	// Add the rest of PTR record
+	static const unsigned char ptr_tail[] = {
+		0x05, 0x6c, 0x6f, 0x63, 0x61, 0x6c, 0x00, 0x00, 0x0c, 0x00, 0xff,
+	};
+	std::copy(ptr_tail, ptr_tail + sizeof(ptr_tail), std::back_inserter(data));
+
+	return BonjourRequest(id, std::move(data));
+}
+
+
+// API - private part
+
+struct Bonjour::priv
+{
+	const std::string service;
+	const std::string protocol;
+	const std::string service_dn;
+	unsigned timeout;
+	unsigned retries;
+	uint16_t rq_id;
+
+	std::vector<char> buffer;
+	std::thread io_thread;
+	Bonjour::ReplyFn replyfn;
+	Bonjour::CompleteFn completefn;
+
+	priv(std::string service, std::string protocol);
+
+	std::string strip_service_dn(const std::string &service_name) const;
+	void udp_receive(udp::endpoint from, size_t bytes);
+	void lookup_perform();
+};
+
+Bonjour::priv::priv(std::string service, std::string protocol) :
+	service(std::move(service)),
+	protocol(std::move(protocol)),
+	service_dn((boost::format("_%1%._%2%.local") % this->service % this->protocol).str()),
+	timeout(10),
+	retries(1),
+	rq_id(0)
+{
+	buffer.resize(DnsMessage::MAX_SIZE);
+}
+
+std::string Bonjour::priv::strip_service_dn(const std::string &service_name) const
+{
+	if (service_name.size() <= service_dn.size()) {
+		return service_name;
+	}
+
+	auto needle = service_name.rfind(service_dn);
+	if (needle == service_name.size() - service_dn.size()) {
+		return service_name.substr(0, needle - 1);
+	} else {
+		return service_name;
+	}
+}
+
+void Bonjour::priv::udp_receive(udp::endpoint from, size_t bytes)
+{
+	if (bytes == 0 || !replyfn) {
+		return;
+	}
+
+	buffer.resize(bytes);
+	const auto dns_msg = DnsMessage::decode(buffer, rq_id);
+	if (dns_msg) {
+		asio::ip::address ip = from.address();
+		if (dns_msg->rr_a) { ip = dns_msg->rr_a->ip; }
+		else if (dns_msg->rr_aaaa) { ip = dns_msg->rr_aaaa->ip; }
+
+		for (const auto &sdpair : dns_msg->sdmap) {
+			if (! sdpair.second.srv) {
+				continue;
+			}
+
+			const auto &srv = *sdpair.second.srv;
+			auto service_name = strip_service_dn(sdpair.first);
+
+			std::string path;
+			std::string version;
+
+			if (sdpair.second.txt) {
+				static const std::string tag_path = "path=";
+				static const std::string tag_version = "version=";
+
+				for (const auto &value : sdpair.second.txt->values) {
+					if (value.size() > tag_path.size() && value.compare(0, tag_path.size(), tag_path) == 0) {
+						path = std::move(value.substr(tag_path.size()));
+					} else if (value.size() > tag_version.size() && value.compare(0, tag_version.size(), tag_version) == 0) {
+						version = std::move(value.substr(tag_version.size()));
+					}
+				}
+			}
+
+			BonjourReply reply(ip, srv.port, std::move(service_name), srv.hostname, std::move(path), std::move(version));
+			replyfn(std::move(reply));
+		}
+	}
+}
+
+void Bonjour::priv::lookup_perform()
+{
+	const auto brq = BonjourRequest::make(service, protocol);
+	if (!brq) {
+		return;
+	}
+
+	auto self = this;
+	rq_id = brq->id;
+
+	try {
+		boost::asio::io_service io_service;
+		udp::socket socket(io_service);
+		socket.open(udp::v4());
+		socket.set_option(udp::socket::reuse_address(true));
+		udp::endpoint mcast(BonjourRequest::MCAST_IP4, BonjourRequest::MCAST_PORT);
+		socket.send_to(asio::buffer(brq->data), mcast);
+
+		bool expired = false;
+		bool retry = false;
+		asio::deadline_timer timer(io_service);
+		retries--;
+		std::function<void(const error_code &)> timer_handler = [&](const error_code &error) {
+			if (retries == 0 || error) {
+				expired = true;
+				if (self->completefn) {
+					self->completefn();
+				}
+			} else {
+				retry = true;
+				retries--;
+				timer.expires_from_now(boost::posix_time::seconds(timeout));
+				timer.async_wait(timer_handler);
+			}
+		};
+
+		timer.expires_from_now(boost::posix_time::seconds(timeout));
+		timer.async_wait(timer_handler);
+
+		udp::endpoint recv_from;
+		const auto recv_handler = [&](const error_code &error, size_t bytes) {
+			if (!error) { self->udp_receive(recv_from, bytes); }
+		};
+		socket.async_receive_from(asio::buffer(buffer, buffer.size()), recv_from, recv_handler);
+
+		while (io_service.run_one()) {
+			if (expired) {
+				socket.cancel();
+			} else if (retry) {
+				retry = false;
+				socket.send_to(asio::buffer(brq->data), mcast);
+			} else {
+				buffer.resize(DnsMessage::MAX_SIZE);
+				socket.async_receive_from(asio::buffer(buffer, buffer.size()), recv_from, recv_handler);
+			}
+		}
+	} catch (std::exception& e) {
+	}
+}
+
+
+// API - public part
+
+BonjourReply::BonjourReply(boost::asio::ip::address ip, uint16_t port, std::string service_name, std::string hostname, std::string path, std::string version) :
+	ip(std::move(ip)),
+	port(port),
+	service_name(std::move(service_name)),
+	hostname(std::move(hostname)),
+	path(path.empty() ? std::move(std::string("/")) : std::move(path)),
+	version(version.empty() ? std::move(std::string("Unknown")) : std::move(version))
+{
+	std::string proto;
+	std::string port_suffix;
+	if (port == 443) { proto = "https://"; }
+	if (port != 443 && port != 80) { port_suffix = std::to_string(port).insert(0, 1, ':'); }
+	if (this->path[0] != '/') { this->path.insert(0, 1, '/'); }
+	full_address = proto + ip.to_string() + port_suffix;
+	if (this->path != "/") { full_address += path; }
+}
+
+bool BonjourReply::operator==(const BonjourReply &other) const
+{
+	return this->full_address == other.full_address
+		&& this->service_name == other.service_name;
+}
+
+bool BonjourReply::operator<(const BonjourReply &other) const
+{
+	if (this->ip != other.ip) {
+		// So that the common case doesn't involve string comparison
+		return this->ip < other.ip;
+	} else {
+		auto cmp = this->full_address.compare(other.full_address);
+		return cmp != 0 ? cmp < 0 : this->service_name < other.service_name;
+	}
+}
+
+std::ostream& operator<<(std::ostream &os, const BonjourReply &reply)
+{
+	os << "BonjourReply(" << reply.ip.to_string() << ", " << reply.service_name << ", "
+		<< reply.hostname << ", " << reply.path << ", " << reply.version << ")";
+	return os;
+}
+
+
+Bonjour::Bonjour(std::string service, std::string protocol) :
+	p(new priv(std::move(service), std::move(protocol)))
+{}
+
+Bonjour::Bonjour(Bonjour &&other) : p(std::move(other.p)) {}
+
+Bonjour::~Bonjour()
+{
+	if (p && p->io_thread.joinable()) {
+		p->io_thread.detach();
+	}
+}
+
+Bonjour& Bonjour::set_timeout(unsigned timeout)
+{
+	if (p) { p->timeout = timeout; }
+	return *this;
+}
+
+Bonjour& Bonjour::set_retries(unsigned retries)
+{
+	if (p && retries > 0) { p->retries = retries; }
+	return *this;
+}
+
+Bonjour& Bonjour::on_reply(ReplyFn fn)
+{
+	if (p) { p->replyfn = std::move(fn); }
+	return *this;
+}
+
+Bonjour& Bonjour::on_complete(CompleteFn fn)
+{
+	if (p) { p->completefn = std::move(fn); }
+	return *this;
+}
+
+Bonjour::Ptr Bonjour::lookup()
+{
+	auto self = std::make_shared<Bonjour>(std::move(*this));
+
+	if (self->p) {
+		auto io_thread = std::thread([self]() {
+				self->p->lookup_perform();
+			});
+		self->p->io_thread = std::move(io_thread);
+	}
+
+	return self;
+}
+
+
+}

src/slic3r/Utils/Bonjour.hpp

@@ -0,0 +1,64 @@
+#ifndef slic3r_Bonjour_hpp_
+#define slic3r_Bonjour_hpp_
+
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <functional>
+#include <boost/asio/ip/address.hpp>
+
+
+namespace Slic3r {
+
+
+struct BonjourReply
+{
+	boost::asio::ip::address ip;
+	uint16_t port;
+	std::string service_name;
+	std::string hostname;
+	std::string full_address;
+	std::string path;
+	std::string version;
+
+	BonjourReply() = delete;
+	BonjourReply(boost::asio::ip::address ip, uint16_t port, std::string service_name, std::string hostname, std::string path, std::string version);
+
+	bool operator==(const BonjourReply &other) const;
+	bool operator<(const BonjourReply &other) const;
+};
+
+std::ostream& operator<<(std::ostream &, const BonjourReply &);
+
+
+/// Bonjour lookup performer
+class Bonjour : public std::enable_shared_from_this<Bonjour> {
+private:
+	struct priv;
+public:
+	typedef std::shared_ptr<Bonjour> Ptr;
+	typedef std::function<void(BonjourReply &&)> ReplyFn;
+	typedef std::function<void()> CompleteFn;
+
+	Bonjour(std::string service, std::string protocol = "tcp");
+	Bonjour(Bonjour &&other);
+	~Bonjour();
+
+	Bonjour& set_timeout(unsigned timeout);
+	Bonjour& set_retries(unsigned retries);
+	// ^ Note: By default there is 1 retry (meaning 1 broadcast is sent).
+	// Timeout is per one retry, ie. total time spent listening = retries * timeout.
+	// If retries > 1, then care needs to be taken as more than one reply from the same service may be received.
+
+	Bonjour& on_reply(ReplyFn fn);
+	Bonjour& on_complete(CompleteFn fn);
+
+	Ptr lookup();
+private:
+	std::unique_ptr<priv> p;
+};
+
+
+}
+
+#endif

src/slic3r/Utils/Duet.cpp

@@ -0,0 +1,279 @@
+#include "Duet.hpp"
+#include "PrintHostSendDialog.hpp"
+
+#include <algorithm>
+#include <ctime>
+#include <boost/filesystem/path.hpp>
+#include <boost/format.hpp>
+#include <boost/log/trivial.hpp>
+#include <boost/property_tree/ptree.hpp>
+#include <boost/property_tree/json_parser.hpp>
+
+#include <wx/frame.h>
+#include <wx/event.h>
+#include <wx/progdlg.h>
+#include <wx/sizer.h>
+#include <wx/stattext.h>
+#include <wx/textctrl.h>
+#include <wx/checkbox.h>
+
+#include "libslic3r/PrintConfig.hpp"
+#include "slic3r/GUI/GUI.hpp"
+#include "slic3r/GUI/MsgDialog.hpp"
+#include "Http.hpp"
+
+namespace fs = boost::filesystem;
+namespace pt = boost::property_tree;
+
+namespace Slic3r {
+
+Duet::Duet(DynamicPrintConfig *config) :
+	host(config->opt_string("print_host")),
+	password(config->opt_string("printhost_apikey"))
+{}
+
+Duet::~Duet() {}
+
+bool Duet::test(wxString &msg) const
+{
+	bool connected = connect(msg);
+	if (connected) {
+		disconnect();
+	}
+
+	return connected;
+}
+
+wxString Duet::get_test_ok_msg () const
+{
+	return wxString::Format("%s", _(L("Connection to Duet works correctly.")));
+}
+
+wxString Duet::get_test_failed_msg (wxString &msg) const
+{
+	return wxString::Format("%s: %s", _(L("Could not connect to Duet")), msg);
+}
+
+bool Duet::send_gcode(const std::string &filename) const
+{
+	enum { PROGRESS_RANGE = 1000 };
+
+	const auto errortitle = _(L("Error while uploading to the Duet"));
+	fs::path filepath(filename);
+
+	PrintHostSendDialog send_dialog(filepath.filename(), true);
+	if (send_dialog.ShowModal() != wxID_OK) { return false; }
+
+	const bool print = send_dialog.print(); 
+	const auto upload_filepath = send_dialog.filename();
+	const auto upload_filename = upload_filepath.filename();
+	const auto upload_parent_path = upload_filepath.parent_path();
+
+	wxProgressDialog progress_dialog(
+	 	_(L("Duet upload")),
+	 	_(L("Sending G-code file to Duet...")),
+		PROGRESS_RANGE, nullptr, wxPD_AUTO_HIDE | wxPD_APP_MODAL | wxPD_CAN_ABORT);
+	progress_dialog.Pulse();
+
+	wxString connect_msg;
+	if (!connect(connect_msg)) {
+		auto errormsg = wxString::Format("%s: %s", errortitle, connect_msg);
+		GUI::show_error(&progress_dialog, std::move(errormsg));
+		return false;
+	}
+
+	bool res = true;
+
+	auto upload_cmd = get_upload_url(upload_filepath.string());
+	BOOST_LOG_TRIVIAL(info) << boost::format("Duet: Uploading file %1%, filename: %2%, path: %3%, print: %4%, command: %5%")
+		% filepath.string()
+		% upload_filename.string()
+		% upload_parent_path.string()
+		% print
+		% upload_cmd;
+
+	auto http = Http::post(std::move(upload_cmd));
+	http.set_post_body(filename)
+		.on_complete([&](std::string body, unsigned status) {
+			BOOST_LOG_TRIVIAL(debug) << boost::format("Duet: File uploaded: HTTP %1%: %2%") % status % body;
+			progress_dialog.Update(PROGRESS_RANGE);
+
+			int err_code = get_err_code_from_body(body);
+			if (err_code != 0) {
+				auto msg = format_error(body, L("Unknown error occured"), 0);
+				GUI::show_error(&progress_dialog, std::move(msg));
+				res = false;
+			} else if (print) {
+				wxString errormsg;
+				res = start_print(errormsg, upload_filepath.string());
+				if (!res) {
+					GUI::show_error(&progress_dialog, std::move(errormsg));
+				}
+			}
+		})
+		.on_error([&](std::string body, std::string error, unsigned status) {
+			BOOST_LOG_TRIVIAL(error) << boost::format("Duet: Error uploading file: %1%, HTTP %2%, body: `%3%`") % error % status % body;
+			auto errormsg = wxString::Format("%s: %s", errortitle, format_error(body, error, status));
+			GUI::show_error(&progress_dialog, std::move(errormsg));
+			res = false;
+		})
+		.on_progress([&](Http::Progress progress, bool &cancel) {
+			if (cancel) {
+				// Upload was canceled
+				res = false;
+			} else if (progress.ultotal > 0) {
+				int value = PROGRESS_RANGE * progress.ulnow / progress.ultotal;
+				cancel = !progress_dialog.Update(std::min(value, PROGRESS_RANGE - 1));    // Cap the value to prevent premature dialog closing
+			} else {
+				cancel = !progress_dialog.Pulse();
+			}
+		})
+		.perform_sync();
+
+	disconnect();
+
+	return res;
+}
+
+bool Duet::has_auto_discovery() const
+{
+	return false;
+}
+
+bool Duet::can_test() const
+{
+	return true;
+}
+
+bool Duet::connect(wxString &msg) const
+{
+	bool res = false;
+	auto url = get_connect_url();
+
+	auto http = Http::get(std::move(url));
+	http.on_error([&](std::string body, std::string error, unsigned status) {
+			BOOST_LOG_TRIVIAL(error) << boost::format("Duet: Error connecting: %1%, HTTP %2%, body: `%3%`") % error % status % body;
+			msg = format_error(body, error, status);
+		})
+		.on_complete([&](std::string body, unsigned) {
+			BOOST_LOG_TRIVIAL(debug) << boost::format("Duet: Got: %1%") % body;
+
+			int err_code = get_err_code_from_body(body);
+			switch (err_code) {
+				case 0:
+					res = true;
+					break;
+				case 1:
+					msg = format_error(body, L("Wrong password"), 0);
+					break;
+				case 2:
+					msg = format_error(body, L("Could not get resources to create a new connection"), 0);
+					break;
+				default:
+					msg = format_error(body, L("Unknown error occured"), 0);
+					break;
+			}
+
+		})
+		.perform_sync();
+
+	return res;
+}
+
+void Duet::disconnect() const
+{
+	auto url =  (boost::format("%1%rr_disconnect")
+			% get_base_url()).str();
+
+	auto http = Http::get(std::move(url));
+	http.on_error([&](std::string body, std::string error, unsigned status) {
+		// we don't care about it, if disconnect is not working Duet will disconnect automatically after some time
+		BOOST_LOG_TRIVIAL(error) << boost::format("Duet: Error disconnecting: %1%, HTTP %2%, body: `%3%`") % error % status % body;
+	})
+	.perform_sync();
+}
+
+std::string Duet::get_upload_url(const std::string &filename) const
+{
+	return (boost::format("%1%rr_upload?name=0:/gcodes/%2%&%3%")
+			% get_base_url()
+			% Http::url_encode(filename) 
+			% timestamp_str()).str();
+}
+
+std::string Duet::get_connect_url() const
+{
+	return (boost::format("%1%rr_connect?password=%2%&%3%")
+			% get_base_url()
+			% (password.empty() ? "reprap" : password)
+			% timestamp_str()).str();
+}
+
+std::string Duet::get_base_url() const
+{
+	if (host.find("http://") == 0 || host.find("https://") == 0) {
+		if (host.back() == '/') {
+			return host;
+		} else {
+			return (boost::format("%1%/") % host).str();
+		}
+	} else {
+		return (boost::format("http://%1%/") % host).str();
+	}
+}
+
+std::string Duet::timestamp_str() const
+{
+	enum { BUFFER_SIZE = 32 };
+
+	auto t = std::time(nullptr);
+	auto tm = *std::localtime(&t);
+
+	char buffer[BUFFER_SIZE];
+	std::strftime(buffer, BUFFER_SIZE, "time=%Y-%m-%dT%H:%M:%S", &tm);
+
+	return std::string(buffer);
+}
+
+wxString Duet::format_error(const std::string &body, const std::string &error, unsigned status)
+{
+	if (status != 0) {
+		auto wxbody = wxString::FromUTF8(body.data());
+		return wxString::Format("HTTP %u: %s", status, wxbody);
+	} else {
+		return wxString::FromUTF8(error.data());
+	}
+}
+
+bool Duet::start_print(wxString &msg, const std::string &filename) const 
+{
+	bool res = false;
+	
+	auto url = (boost::format("%1%rr_gcode?gcode=M32%%20\"%2%\"")
+			% get_base_url()
+			% Http::url_encode(filename)).str();
+
+	auto http = Http::get(std::move(url));
+	http.on_error([&](std::string body, std::string error, unsigned status) {
+			BOOST_LOG_TRIVIAL(error) << boost::format("Duet: Error starting print: %1%, HTTP %2%, body: `%3%`") % error % status % body;
+			msg = format_error(body, error, status);
+		})
+		.on_complete([&](std::string body, unsigned) {
+			BOOST_LOG_TRIVIAL(debug) << boost::format("Duet: Got: %1%") % body;
+			res = true;
+		})
+		.perform_sync();
+
+	return res;
+}
+
+int Duet::get_err_code_from_body(const std::string &body) const
+{
+	pt::ptree root;
+	std::istringstream iss (body); // wrap returned json to istringstream
+	pt::read_json(iss, root);
+
+	return root.get<int>("err", 0);
+}
+
+}

src/slic3r/Utils/Duet.hpp

@@ -0,0 +1,47 @@
+#ifndef slic3r_Duet_hpp_
+#define slic3r_Duet_hpp_
+
+#include <string>
+#include <wx/string.h>
+
+#include "PrintHost.hpp"
+
+
+namespace Slic3r {
+
+
+class DynamicPrintConfig;
+class Http;
+
+class Duet : public PrintHost
+{
+public:
+	Duet(DynamicPrintConfig *config);
+	virtual ~Duet();
+
+	bool test(wxString &curl_msg) const;
+	wxString get_test_ok_msg () const;
+	wxString get_test_failed_msg (wxString &msg) const;
+	// Send gcode file to duet, filename is expected to be in UTF-8
+	bool send_gcode(const std::string &filename) const;
+	bool has_auto_discovery() const;
+	bool can_test() const;
+private:
+	std::string host;
+	std::string password;
+
+	std::string get_upload_url(const std::string &filename) const;
+	std::string get_connect_url() const;
+	std::string get_base_url() const;
+	std::string timestamp_str() const;
+	bool connect(wxString &msg) const;
+	void disconnect() const;
+	bool start_print(wxString &msg, const std::string &filename) const;
+	int get_err_code_from_body(const std::string &body) const;
+	static wxString format_error(const std::string &body, const std::string &error, unsigned status);
+};
+
+
+}
+
+#endif

src/slic3r/Utils/FixModelByWin10.cpp

@@ -0,0 +1,402 @@
+#ifdef HAS_WIN10SDK
+
+#ifndef NOMINMAX
+# define NOMINMAX
+#endif
+
+#include "FixModelByWin10.hpp"
+
+#include <atomic>
+#include <chrono>
+#include <cstdint>
+#include <condition_variable>
+#include <exception>
+#include <string>
+#include <thread>
+
+#include <boost/filesystem.hpp>
+#include <boost/nowide/convert.hpp>
+#include <boost/nowide/cstdio.hpp>
+
+#include <roapi.h>
+// for ComPtr
+#include <wrl/client.h>
+// from C:/Program Files (x86)/Windows Kits/10/Include/10.0.17134.0/
+#include <winrt/robuffer.h>
+#include <winrt/windows.storage.provider.h>
+#include <winrt/windows.graphics.printing3d.h>
+
+#include "libslic3r/Model.hpp"
+#include "libslic3r/Print.hpp"
+#include "libslic3r/Format/3mf.hpp"
+#include "../GUI/GUI.hpp"
+#include "../GUI/PresetBundle.hpp"
+
+#include <wx/msgdlg.h>
+#include <wx/progdlg.h>
+
+extern "C"{
+	// from rapi.h
+	typedef HRESULT (__stdcall* FunctionRoInitialize)(int);
+	typedef HRESULT (__stdcall* FunctionRoUninitialize)();
+	typedef HRESULT	(__stdcall* FunctionRoActivateInstance)(HSTRING activatableClassId, IInspectable **instance);
+	typedef HRESULT (__stdcall* FunctionRoGetActivationFactory)(HSTRING activatableClassId, REFIID iid, void **factory);
+	// from winstring.h
+	typedef HRESULT	(__stdcall* FunctionWindowsCreateString)(LPCWSTR sourceString, UINT32  length, HSTRING *string);
+	typedef HRESULT	(__stdcall* FunctionWindowsDelteString)(HSTRING string);
+}
+
+namespace Slic3r {
+
+HMODULE							s_hRuntimeObjectLibrary  = nullptr;
+FunctionRoInitialize			s_RoInitialize			 = nullptr;
+FunctionRoUninitialize			s_RoUninitialize		 = nullptr;
+FunctionRoActivateInstance		s_RoActivateInstance     = nullptr;
+FunctionRoGetActivationFactory	s_RoGetActivationFactory = nullptr;
+FunctionWindowsCreateString		s_WindowsCreateString    = nullptr;
+FunctionWindowsDelteString		s_WindowsDeleteString    = nullptr;
+
+bool winrt_load_runtime_object_library()
+{
+	if (s_hRuntimeObjectLibrary == nullptr)
+		s_hRuntimeObjectLibrary = LoadLibrary(L"ComBase.dll");
+	if (s_hRuntimeObjectLibrary != nullptr) {
+		s_RoInitialize			 = (FunctionRoInitialize)			GetProcAddress(s_hRuntimeObjectLibrary, "RoInitialize");
+		s_RoUninitialize		 = (FunctionRoUninitialize)			GetProcAddress(s_hRuntimeObjectLibrary, "RoUninitialize");
+		s_RoActivateInstance	 = (FunctionRoActivateInstance)		GetProcAddress(s_hRuntimeObjectLibrary, "RoActivateInstance");
+		s_RoGetActivationFactory = (FunctionRoGetActivationFactory)	GetProcAddress(s_hRuntimeObjectLibrary, "RoGetActivationFactory");
+		s_WindowsCreateString	 = (FunctionWindowsCreateString)	GetProcAddress(s_hRuntimeObjectLibrary, "WindowsCreateString");
+		s_WindowsDeleteString	 = (FunctionWindowsDelteString)		GetProcAddress(s_hRuntimeObjectLibrary, "WindowsDeleteString");
+	}
+	return s_RoInitialize && s_RoUninitialize && s_RoActivateInstance && s_WindowsCreateString && s_WindowsDeleteString;
+}
+
+static HRESULT winrt_activate_instance(const std::wstring &class_name, IInspectable **pinst)
+{
+	HSTRING hClassName;
+	HRESULT hr = (*s_WindowsCreateString)(class_name.c_str(), class_name.size(), &hClassName);
+	if (S_OK != hr) 
+		return hr;
+	hr = (*s_RoActivateInstance)(hClassName, pinst);
+	(*s_WindowsDeleteString)(hClassName);
+	return hr;
+}
+
+template<typename TYPE>
+static HRESULT winrt_activate_instance(const std::wstring &class_name, TYPE **pinst)
+{
+	IInspectable *pinspectable = nullptr;
+	HRESULT hr = winrt_activate_instance(class_name, &pinspectable);
+	if (S_OK != hr)
+		return hr;
+	hr = pinspectable->QueryInterface(__uuidof(TYPE), (void**)pinst);
+	pinspectable->Release();
+	return hr;
+}
+
+static HRESULT winrt_get_activation_factory(const std::wstring &class_name, REFIID iid, void **pinst)
+{
+	HSTRING hClassName;
+	HRESULT hr = (*s_WindowsCreateString)(class_name.c_str(), class_name.size(), &hClassName);
+	if (S_OK != hr)
+		return hr;
+	hr = (*s_RoGetActivationFactory)(hClassName, iid, pinst);
+	(*s_WindowsDeleteString)(hClassName);
+	return hr;
+}
+
+template<typename TYPE>
+static HRESULT winrt_get_activation_factory(const std::wstring &class_name, TYPE **pinst)
+{
+	return winrt_get_activation_factory(class_name, __uuidof(TYPE), reinterpret_cast<void**>(pinst));
+}
+
+// To be called often to test whether to cancel the operation.
+typedef std::function<void ()> ThrowOnCancelFn;
+
+template<typename T>
+static AsyncStatus winrt_async_await(const Microsoft::WRL::ComPtr<T> &asyncAction, ThrowOnCancelFn throw_on_cancel, int blocking_tick_ms = 100)
+{
+	Microsoft::WRL::ComPtr<ABI::Windows::Foundation::IAsyncInfo> asyncInfo;
+	asyncAction.As(&asyncInfo);
+	AsyncStatus status;
+	// Ugly blocking loop until the RepairAsync call finishes.
+//FIXME replace with a callback.
+// https://social.msdn.microsoft.com/Forums/en-US/a5038fb4-b7b7-4504-969d-c102faa389fb/trying-to-block-an-async-operation-and-wait-for-a-particular-time?forum=vclanguage
+	for (;;) {
+		asyncInfo->get_Status(&status);
+		if (status != AsyncStatus::Started)
+			return status;
+		throw_on_cancel();
+		::Sleep(blocking_tick_ms);
+	}
+}
+
+static HRESULT winrt_open_file_stream(
+	const std::wstring									 &path,
+	ABI::Windows::Storage::FileAccessMode				  mode,
+	ABI::Windows::Storage::Streams::IRandomAccessStream **fileStream,
+	ThrowOnCancelFn										  throw_on_cancel)
+{
+	// Get the file factory.
+	Microsoft::WRL::ComPtr<ABI::Windows::Storage::IStorageFileStatics> fileFactory;
+	HRESULT hr = winrt_get_activation_factory(L"Windows.Storage.StorageFile", fileFactory.GetAddressOf());
+	if (FAILED(hr)) return hr;
+
+	// Open the file asynchronously.
+	HSTRING hstr_path;
+	hr = (*s_WindowsCreateString)(path.c_str(), path.size(), &hstr_path);
+	if (FAILED(hr)) return hr;
+	Microsoft::WRL::ComPtr<ABI::Windows::Foundation::IAsyncOperation<ABI::Windows::Storage::StorageFile*>> fileOpenAsync;
+	hr = fileFactory->GetFileFromPathAsync(hstr_path, fileOpenAsync.GetAddressOf());
+	if (FAILED(hr)) return hr;
+	(*s_WindowsDeleteString)(hstr_path);
+
+	// Wait until the file gets open, get the actual file.
+	AsyncStatus status = winrt_async_await(fileOpenAsync, throw_on_cancel);
+	Microsoft::WRL::ComPtr<ABI::Windows::Storage::IStorageFile> storageFile;
+	if (status == AsyncStatus::Completed) {
+		hr = fileOpenAsync->GetResults(storageFile.GetAddressOf());
+	} else {
+		Microsoft::WRL::ComPtr<ABI::Windows::Foundation::IAsyncInfo> asyncInfo;
+		hr = fileOpenAsync.As(&asyncInfo);
+		if (FAILED(hr)) return hr;
+		HRESULT err;
+		hr = asyncInfo->get_ErrorCode(&err);
+		return FAILED(hr) ? hr : err;
+	}
+
+	Microsoft::WRL::ComPtr<ABI::Windows::Foundation::IAsyncOperation<ABI::Windows::Storage::Streams::IRandomAccessStream*>> fileStreamAsync;
+	hr = storageFile->OpenAsync(mode, fileStreamAsync.GetAddressOf());
+	if (FAILED(hr)) return hr;
+
+	status = winrt_async_await(fileStreamAsync, throw_on_cancel);
+	if (status == AsyncStatus::Completed) {
+		hr = fileStreamAsync->GetResults(fileStream);
+	} else {
+		Microsoft::WRL::ComPtr<ABI::Windows::Foundation::IAsyncInfo> asyncInfo;
+		hr = fileStreamAsync.As(&asyncInfo);
+		if (FAILED(hr)) return hr;
+		HRESULT err;
+		hr = asyncInfo->get_ErrorCode(&err);
+		if (!FAILED(hr))
+			hr = err;
+	}
+	return hr;
+}
+
+bool is_windows10()
+{
+	HKEY hKey;
+	LONG lRes = RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion", 0, KEY_READ, &hKey);
+	if (lRes == ERROR_SUCCESS) {
+		WCHAR szBuffer[512];
+		DWORD dwBufferSize = sizeof(szBuffer);
+		lRes = RegQueryValueExW(hKey, L"ProductName", 0, nullptr, (LPBYTE)szBuffer, &dwBufferSize);
+		if (lRes == ERROR_SUCCESS)
+			return wcsncmp(szBuffer, L"Windows 10", 10) == 0;
+		RegCloseKey(hKey);
+	}
+	return false;
+}
+
+// Progress function, to be called regularly to update the progress.
+typedef std::function<void (const char * /* message */, unsigned /* progress */)> ProgressFn;
+
+void fix_model_by_win10_sdk(const std::string &path_src, const std::string &path_dst, ProgressFn on_progress, ThrowOnCancelFn throw_on_cancel)
+{
+	if (! is_windows10())
+		throw std::runtime_error("fix_model_by_win10_sdk called on non Windows 10 system");
+
+	if (! winrt_load_runtime_object_library())
+		throw std::runtime_error("Failed to initialize the WinRT library.");
+
+	HRESULT hr = (*s_RoInitialize)(RO_INIT_MULTITHREADED);
+	{
+		on_progress(L("Exporting the source model"), 20);
+
+		Microsoft::WRL::ComPtr<ABI::Windows::Storage::Streams::IRandomAccessStream>       fileStream;
+		hr = winrt_open_file_stream(boost::nowide::widen(path_src), ABI::Windows::Storage::FileAccessMode::FileAccessMode_Read, fileStream.GetAddressOf(), throw_on_cancel);
+
+		Microsoft::WRL::ComPtr<ABI::Windows::Graphics::Printing3D::IPrinting3D3MFPackage> printing3d3mfpackage;
+		hr = winrt_activate_instance(L"Windows.Graphics.Printing3D.Printing3D3MFPackage", printing3d3mfpackage.GetAddressOf());
+
+		Microsoft::WRL::ComPtr<ABI::Windows::Foundation::IAsyncOperation<ABI::Windows::Graphics::Printing3D::Printing3DModel*>> modelAsync;
+		hr = printing3d3mfpackage->LoadModelFromPackageAsync(fileStream.Get(), modelAsync.GetAddressOf());
+
+		AsyncStatus status = winrt_async_await(modelAsync, throw_on_cancel);
+		Microsoft::WRL::ComPtr<ABI::Windows::Graphics::Printing3D::IPrinting3DModel>	  model;
+		if (status == AsyncStatus::Completed)
+			hr = modelAsync->GetResults(model.GetAddressOf());
+		else
+			throw std::runtime_error(L("Failed loading the input model."));
+
+		Microsoft::WRL::ComPtr<ABI::Windows::Foundation::Collections::IVector<ABI::Windows::Graphics::Printing3D::Printing3DMesh*>> meshes;
+		hr = model->get_Meshes(meshes.GetAddressOf());
+		unsigned num_meshes = 0;
+		hr = meshes->get_Size(&num_meshes);
+		
+		on_progress(L("Repairing the model by the Netfabb service"), 40);
+		
+		Microsoft::WRL::ComPtr<ABI::Windows::Foundation::IAsyncAction>					  repairAsync;
+		hr = model->RepairAsync(repairAsync.GetAddressOf());
+		status = winrt_async_await(repairAsync, throw_on_cancel);
+		if (status != AsyncStatus::Completed)
+			throw std::runtime_error(L("Mesh repair failed."));
+		repairAsync->GetResults();
+
+		on_progress(L("Loading the repaired model"), 60);
+
+		// Verify the number of meshes returned after the repair action.
+		meshes.Reset();
+		hr = model->get_Meshes(meshes.GetAddressOf());
+		hr = meshes->get_Size(&num_meshes);
+
+		// Save model to this class' Printing3D3MFPackage.
+		Microsoft::WRL::ComPtr<ABI::Windows::Foundation::IAsyncAction>					  saveToPackageAsync;
+		hr = printing3d3mfpackage->SaveModelToPackageAsync(model.Get(), saveToPackageAsync.GetAddressOf());
+		status = winrt_async_await(saveToPackageAsync, throw_on_cancel);
+		if (status != AsyncStatus::Completed)
+			throw std::runtime_error(L("Saving mesh into the 3MF container failed."));
+		hr = saveToPackageAsync->GetResults();
+
+		Microsoft::WRL::ComPtr<ABI::Windows::Foundation::IAsyncOperation<ABI::Windows::Storage::Streams::IRandomAccessStream*>> generatorStreamAsync;
+		hr = printing3d3mfpackage->SaveAsync(generatorStreamAsync.GetAddressOf());
+		status = winrt_async_await(generatorStreamAsync, throw_on_cancel);
+		if (status != AsyncStatus::Completed)
+			throw std::runtime_error(L("Saving mesh into the 3MF container failed."));
+		Microsoft::WRL::ComPtr<ABI::Windows::Storage::Streams::IRandomAccessStream> generatorStream;
+		hr = generatorStreamAsync->GetResults(generatorStream.GetAddressOf());
+
+		// Go to the beginning of the stream.
+		generatorStream->Seek(0);
+		Microsoft::WRL::ComPtr<ABI::Windows::Storage::Streams::IInputStream> inputStream;
+		hr = generatorStream.As(&inputStream);
+
+		// Get the buffer factory.
+		Microsoft::WRL::ComPtr<ABI::Windows::Storage::Streams::IBufferFactory> bufferFactory;
+		hr = winrt_get_activation_factory(L"Windows.Storage.Streams.Buffer", bufferFactory.GetAddressOf());
+
+		// Open the destination file.
+		FILE *fout = boost::nowide::fopen(path_dst.c_str(), "wb");
+
+		Microsoft::WRL::ComPtr<ABI::Windows::Storage::Streams::IBuffer> buffer;
+		byte														   *buffer_ptr;
+		bufferFactory->Create(65536 * 2048, buffer.GetAddressOf());
+		{
+			Microsoft::WRL::ComPtr<Windows::Storage::Streams::IBufferByteAccess> bufferByteAccess;
+			buffer.As(&bufferByteAccess);
+			hr = bufferByteAccess->Buffer(&buffer_ptr);
+		}
+		uint32_t length;
+		hr = buffer->get_Length(&length);
+
+		Microsoft::WRL::ComPtr<ABI::Windows::Foundation::IAsyncOperationWithProgress<ABI::Windows::Storage::Streams::IBuffer*, UINT32>> asyncRead;
+		for (;;) {
+			hr = inputStream->ReadAsync(buffer.Get(), 65536 * 2048, ABI::Windows::Storage::Streams::InputStreamOptions_ReadAhead, asyncRead.GetAddressOf());
+			status = winrt_async_await(asyncRead, throw_on_cancel);
+			if (status != AsyncStatus::Completed)
+				throw std::runtime_error(L("Saving mesh into the 3MF container failed."));
+			hr = buffer->get_Length(&length);
+			if (length == 0)
+				break;
+			fwrite(buffer_ptr, length, 1, fout);
+		}
+		fclose(fout);
+		// Here all the COM objects will be released through the ComPtr destructors.
+	}
+	(*s_RoUninitialize)();
+}
+
+class RepairCanceledException : public std::exception {
+public:
+   const char* what() const throw() { return "Model repair has been canceled"; }
+};
+
+void fix_model_by_win10_sdk_gui(const ModelObject &model_object, const Print &print, Model &result)
+{
+	std::mutex 						mutex;
+	std::condition_variable			condition;
+	std::unique_lock<std::mutex>	lock(mutex);
+	struct Progress {
+		std::string 				message;
+		int 						percent  = 0;
+		bool						updated = false;
+	} progress;
+	std::atomic<bool>				canceled = false;
+	std::atomic<bool>				finished = false;
+
+	// Open a progress dialog.
+	wxProgressDialog progress_dialog(
+		_(L("Model fixing")),
+		_(L("Exporting model...")),
+		100, nullptr, wxPD_AUTO_HIDE | wxPD_APP_MODAL | wxPD_CAN_ABORT);
+	// Executing the calculation in a background thread, so that the COM context could be created with its own threading model.
+	// (It seems like wxWidgets initialize the COM contex as single threaded and we need a multi-threaded context).
+	bool success  = false;
+	auto on_progress = [&mutex, &condition, &progress](const char *msg, unsigned prcnt) {
+        std::lock_guard<std::mutex> lk(mutex);
+		progress.message = msg;
+		progress.percent = prcnt;
+		progress.updated = true;
+	    condition.notify_all();
+	};
+	auto worker_thread = boost::thread([&model_object, &print, &result, on_progress, &success, &canceled, &finished]() {
+		try {
+			on_progress(L("Exporting the source model"), 0);
+			boost::filesystem::path path_src = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path();
+			path_src += ".3mf";
+			Model model;
+			model.add_object(model_object);
+			if (! Slic3r::store_3mf(path_src.string().c_str(), &model, const_cast<Print*>(&print), false)) {
+				boost::filesystem::remove(path_src);
+				throw std::runtime_error(L("Export of a temporary 3mf file failed"));
+			}
+			model.clear_objects(); 
+			model.clear_materials();
+			boost::filesystem::path path_dst = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path();
+			path_dst += ".3mf";
+			fix_model_by_win10_sdk(path_src.string().c_str(), path_dst.string(), on_progress, 
+				[&canceled]() { if (canceled) throw RepairCanceledException(); });
+			boost::filesystem::remove(path_src);
+			PresetBundle bundle;
+			on_progress(L("Loading the repaired model"), 80);
+		    bool loaded = Slic3r::load_3mf(path_dst.string().c_str(), &bundle, &result);
+			boost::filesystem::remove(path_dst);
+			if (! loaded)
+ 				throw std::runtime_error(L("Import of the repaired 3mf file failed"));
+			success  = true;
+			finished = true;
+			on_progress(L("Model repair finished"), 100);
+		} catch (RepairCanceledException &ex) {
+			canceled = true;
+			finished = true;
+			on_progress(L("Model repair canceled"), 100);
+		} catch (std::exception &ex) {
+			success = false;
+			finished = true;
+			on_progress(ex.what(), 100);
+		}
+	});
+    while (! finished) {
+		condition.wait_for(lock, std::chrono::milliseconds(500), [&progress]{ return progress.updated; });
+		if (! progress_dialog.Update(progress.percent, _(progress.message)))
+			canceled = true;
+		progress.updated = false;
+    }
+
+	if (canceled) {
+		// Nothing to show.
+	} else if (success) {
+		wxMessageDialog dlg(nullptr, _(L("Model repaired successfully")), _(L("Model Repair by the Netfabb service")), wxICON_INFORMATION | wxOK_DEFAULT);
+		dlg.ShowModal();
+	} else {
+		wxMessageDialog dlg(nullptr, _(L("Model repair failed: \n")) + _(progress.message), _(L("Model Repair by the Netfabb service")), wxICON_ERROR | wxOK_DEFAULT);
+		dlg.ShowModal();
+	}
+	worker_thread.join();
+}
+
+} // namespace Slic3r
+
+#endif /* HAS_WIN10SDK */

src/slic3r/Utils/FixModelByWin10.hpp

@@ -0,0 +1,26 @@
+#ifndef slic3r_GUI_Utils_FixModelByWin10_hpp_
+#define slic3r_GUI_Utils_FixModelByWin10_hpp_
+
+#include <string>
+
+namespace Slic3r {
+
+class Model;
+class ModelObject;
+class Print;
+
+#ifdef HAS_WIN10SDK
+
+extern bool is_windows10();
+extern void fix_model_by_win10_sdk_gui(const ModelObject &model_object, const Print &print, Model &result);
+
+#else /* HAS_WIN10SDK */
+
+inline bool is_windows10() { return false; }
+inline void fix_model_by_win10_sdk_gui(const ModelObject &, const Print &, Model &) {}
+
+#endif /* HAS_WIN10SDK */
+
+} // namespace Slic3r
+
+#endif /* slic3r_GUI_Utils_FixModelByWin10_hpp_ */

src/slic3r/Utils/HexFile.cpp

@@ -0,0 +1,106 @@
+#include "HexFile.hpp"
+
+#include <sstream>
+#include <boost/filesystem/fstream.hpp>
+#include <boost/property_tree/ptree.hpp>
+#include <boost/property_tree/ini_parser.hpp>
+
+namespace fs = boost::filesystem;
+namespace pt = boost::property_tree;
+
+
+namespace Slic3r {
+namespace Utils {
+
+
+static HexFile::DeviceKind parse_device_kind(const std::string &str)
+{
+	     if (str == "mk2") { return HexFile::DEV_MK2; }
+	else if (str == "mk3") { return HexFile::DEV_MK3; }
+	else if (str == "mm-control") { return HexFile::DEV_MM_CONTROL; }
+	else { return HexFile::DEV_GENERIC; }
+}
+
+static size_t hex_num_sections(fs::ifstream &file)
+{
+	file.seekg(0);
+	if (! file.good()) {
+		return 0;
+	}
+
+	static const char *hex_terminator = ":00000001FF\r";
+	size_t res = 0;
+	std::string line;
+	while (getline(file, line, '\n').good()) {
+		// Account for LF vs CRLF
+		if (!line.empty() && line.back() != '\r') {
+			line.push_back('\r');
+		}
+
+		if (line == hex_terminator) {
+			res++;
+		}
+	}
+
+	return res;
+}
+
+HexFile::HexFile(fs::path path) :
+	path(std::move(path))
+{
+	fs::ifstream file(this->path);
+	if (! file.good()) {
+		return;
+	}
+
+	std::string line;
+	std::stringstream header_ini;
+	while (std::getline(file, line, '\n').good()) {
+		if (line.empty()) {
+			continue;
+		}
+
+		// Account for LF vs CRLF
+		if (!line.empty() && line.back() == '\r') {
+			line.pop_back();
+		}
+
+		if (line.front() == ';') {
+			line.front() = ' ';
+			header_ini << line << std::endl;
+		} else if (line.front() == ':') {
+			break;
+		}
+	}
+
+	pt::ptree ptree;
+	try {
+		pt::read_ini(header_ini, ptree);
+	} catch (std::exception &e) {
+		return;
+	}
+
+	bool has_device_meta = false;
+	const auto device = ptree.find("device");
+	if (device != ptree.not_found()) {
+		this->device = parse_device_kind(device->second.data());
+		has_device_meta = true;
+	}
+
+	const auto model_id = ptree.find("model_id");
+	if (model_id != ptree.not_found()) {
+		this->model_id = model_id->second.data();
+	}
+
+	if (! has_device_meta) {
+		// No device metadata, look at the number of 'sections'
+		if (hex_num_sections(file) == 2) {
+			// Looks like a pre-metadata l10n firmware for the MK3, assume that's the case
+			this->device = DEV_MK3;
+		}
+	}
+}
+
+
+}
+}

src/slic3r/Utils/HexFile.hpp

@@ -0,0 +1,33 @@
+#ifndef slic3r_Hex_hpp_
+#define slic3r_Hex_hpp_
+
+#include <string>
+#include <boost/filesystem/path.hpp>
+
+
+namespace Slic3r {
+namespace Utils {
+
+
+struct HexFile
+{
+	enum DeviceKind {
+		DEV_GENERIC,
+		DEV_MK2,
+		DEV_MK3,
+		DEV_MM_CONTROL,
+	};
+
+	boost::filesystem::path path;
+	DeviceKind device = DEV_GENERIC;
+	std::string model_id;
+
+	HexFile() {}
+	HexFile(boost::filesystem::path path);
+};
+
+
+}
+}
+
+#endif

src/slic3r/Utils/Http.cpp

@@ -0,0 +1,451 @@
+#include "Http.hpp"
+
+#include <cstdlib>
+#include <functional>
+#include <thread>
+#include <deque>
+#include <sstream>
+#include <boost/filesystem/fstream.hpp>
+#include <boost/format.hpp>
+
+#include <curl/curl.h>
+
+#include "../../libslic3r/libslic3r.h"
+
+namespace fs = boost::filesystem;
+
+
+namespace Slic3r {
+
+
+// Private
+
+class CurlGlobalInit
+{
+	static const CurlGlobalInit instance;
+
+	CurlGlobalInit()  { ::curl_global_init(CURL_GLOBAL_DEFAULT); }
+	~CurlGlobalInit() { ::curl_global_cleanup(); }
+};
+
+struct Http::priv
+{
+	enum {
+		DEFAULT_SIZE_LIMIT = 5 * 1024 * 1024,
+	};
+
+	::CURL *curl;
+	::curl_httppost *form;
+	::curl_httppost *form_end;
+	::curl_slist *headerlist;
+	// Used for reading the body
+	std::string buffer;
+	// Used for storing file streams added as multipart form parts
+	// Using a deque here because unlike vector it doesn't ivalidate pointers on insertion
+	std::deque<fs::ifstream> form_files;
+	std::string postfields;
+	size_t limit;
+	bool cancel;
+
+	std::thread io_thread;
+	Http::CompleteFn completefn;
+	Http::ErrorFn errorfn;
+	Http::ProgressFn progressfn;
+
+	priv(const std::string &url);
+	~priv();
+
+	static bool ca_file_supported(::CURL *curl);
+	static size_t writecb(void *data, size_t size, size_t nmemb, void *userp);
+	static int xfercb(void *userp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow);
+	static int xfercb_legacy(void *userp, double dltotal, double dlnow, double ultotal, double ulnow);
+	static size_t form_file_read_cb(char *buffer, size_t size, size_t nitems, void *userp);
+
+	void form_add_file(const char *name, const fs::path &path, const char* filename);
+	void set_post_body(const fs::path &path);
+
+	std::string curl_error(CURLcode curlcode);
+	std::string body_size_error();
+	void http_perform();
+};
+
+Http::priv::priv(const std::string &url) :
+	curl(::curl_easy_init()),
+	form(nullptr),
+	form_end(nullptr),
+	headerlist(nullptr),
+	limit(0),
+	cancel(false)
+{
+	if (curl == nullptr) {
+		throw std::runtime_error(std::string("Could not construct Curl object"));
+	}
+
+	::curl_easy_setopt(curl, CURLOPT_URL, url.c_str());   // curl makes a copy internally
+	::curl_easy_setopt(curl, CURLOPT_USERAGENT, SLIC3R_FORK_NAME "/" SLIC3R_VERSION);
+}
+
+Http::priv::~priv()
+{
+	::curl_easy_cleanup(curl);
+	::curl_formfree(form);
+	::curl_slist_free_all(headerlist);
+}
+
+bool Http::priv::ca_file_supported(::CURL *curl)
+{
+#ifdef _WIN32
+	bool res = false;
+#else
+	bool res = true;
+#endif
+
+	if (curl == nullptr) { return res; }
+
+#if LIBCURL_VERSION_MAJOR >= 7 && LIBCURL_VERSION_MINOR >= 48
+	::curl_tlssessioninfo *tls;
+	if (::curl_easy_getinfo(curl, CURLINFO_TLS_SSL_PTR, &tls) == CURLE_OK) {
+		if (tls->backend == CURLSSLBACKEND_SCHANNEL || tls->backend == CURLSSLBACKEND_DARWINSSL) {
+			// With Windows and OS X native SSL support, cert files cannot be set
+			res = false;
+		}
+	}
+#endif
+
+	return res;
+}
+
+size_t Http::priv::writecb(void *data, size_t size, size_t nmemb, void *userp)
+{
+	auto self = static_cast<priv*>(userp);
+	const char *cdata = static_cast<char*>(data);
+	const size_t realsize = size * nmemb;
+
+	const size_t limit = self->limit > 0 ? self->limit : DEFAULT_SIZE_LIMIT;
+	if (self->buffer.size() + realsize > limit) {
+		// This makes curl_easy_perform return CURLE_WRITE_ERROR
+		return 0;
+	}
+
+	self->buffer.append(cdata, realsize);
+
+	return realsize;
+}
+
+int Http::priv::xfercb(void *userp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow)
+{
+	auto self = static_cast<priv*>(userp);
+	bool cb_cancel = false;
+
+	if (self->progressfn) {
+		Progress progress(dltotal, dlnow, ultotal, ulnow);
+		self->progressfn(progress, cb_cancel);
+	}
+
+	return self->cancel || cb_cancel;
+}
+
+int Http::priv::xfercb_legacy(void *userp, double dltotal, double dlnow, double ultotal, double ulnow)
+{
+	return xfercb(userp, dltotal, dlnow, ultotal, ulnow);
+}
+
+size_t Http::priv::form_file_read_cb(char *buffer, size_t size, size_t nitems, void *userp)
+{
+	auto stream = reinterpret_cast<fs::ifstream*>(userp);
+
+	try {
+		stream->read(buffer, size * nitems);
+	} catch (...) {
+		return CURL_READFUNC_ABORT;
+	}
+
+	return stream->gcount();
+}
+
+void Http::priv::form_add_file(const char *name, const fs::path &path, const char* filename)
+{
+	// We can't use CURLFORM_FILECONTENT, because curl doesn't support Unicode filenames on Windows
+	// and so we use CURLFORM_STREAM with boost ifstream to read the file.
+
+	if (filename == nullptr) {
+		filename = path.string().c_str();
+	}
+
+	form_files.emplace_back(path, std::ios::in | std::ios::binary);
+	auto &stream = form_files.back();
+	stream.seekg(0, std::ios::end);
+	size_t size = stream.tellg();
+	stream.seekg(0);
+
+	if (filename != nullptr) {
+		::curl_formadd(&form, &form_end,
+			CURLFORM_COPYNAME, name,
+			CURLFORM_FILENAME, filename,
+			CURLFORM_CONTENTTYPE, "application/octet-stream",
+			CURLFORM_STREAM, static_cast<void*>(&stream),
+			CURLFORM_CONTENTSLENGTH, static_cast<long>(size),
+			CURLFORM_END
+		);
+	}
+}
+
+void Http::priv::set_post_body(const fs::path &path)
+{
+	std::ifstream file(path.string());
+	std::string file_content { std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>() };
+	postfields = file_content;
+}
+
+std::string Http::priv::curl_error(CURLcode curlcode)
+{
+	return (boost::format("%1% (%2%)")
+		% ::curl_easy_strerror(curlcode)
+		% curlcode
+	).str();
+}
+
+std::string Http::priv::body_size_error()
+{
+	return (boost::format("HTTP body data size exceeded limit (%1% bytes)") % limit).str();
+}
+
+void Http::priv::http_perform()
+{
+	::curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
+	::curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writecb);
+	::curl_easy_setopt(curl, CURLOPT_WRITEDATA, static_cast<void*>(this));
+	::curl_easy_setopt(curl, CURLOPT_READFUNCTION, form_file_read_cb);
+
+	::curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
+#if LIBCURL_VERSION_MAJOR >= 7 && LIBCURL_VERSION_MINOR >= 32
+	::curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION, xfercb);
+	::curl_easy_setopt(curl, CURLOPT_XFERINFODATA, static_cast<void*>(this));
+	(void)xfercb_legacy;   // prevent unused function warning
+#else
+	::curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, xfercb);
+	::curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, static_cast<void*>(this));
+#endif
+
+#ifndef NDEBUG
+	::curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
+#endif
+
+	if (headerlist != nullptr) {
+		::curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
+	}
+
+	if (form != nullptr) {
+		::curl_easy_setopt(curl, CURLOPT_HTTPPOST, form);
+	}
+
+	if (!postfields.empty()) {
+		::curl_easy_setopt(curl, CURLOPT_POSTFIELDS, postfields.c_str());
+		::curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE_LARGE, postfields.size());
+	}
+
+	CURLcode res = ::curl_easy_perform(curl);
+
+	if (res != CURLE_OK) {
+		if (res == CURLE_ABORTED_BY_CALLBACK) {
+			if (cancel) {
+				// The abort comes from the request being cancelled programatically
+				Progress dummyprogress(0, 0, 0, 0);
+				bool cancel = true;
+				if (progressfn) { progressfn(dummyprogress, cancel); }
+			} else {
+				// The abort comes from the CURLOPT_READFUNCTION callback, which means reading file failed
+				if (errorfn) { errorfn(std::move(buffer), "Error reading file for file upload", 0); }
+			}
+		}
+		else if (res == CURLE_WRITE_ERROR) {
+			if (errorfn) { errorfn(std::move(buffer), body_size_error(), 0); }
+		} else {
+			if (errorfn) { errorfn(std::move(buffer), curl_error(res), 0); }
+		};
+	} else {
+		long http_status = 0;
+		::curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_status);
+		
+		if (http_status >= 400) {
+			if (errorfn) { errorfn(std::move(buffer), std::string(), http_status); }
+		} else {
+			if (completefn) { completefn(std::move(buffer), http_status); }
+		}
+	}
+}
+
+Http::Http(const std::string &url) : p(new priv(url)) {}
+
+
+// Public
+
+Http::Http(Http &&other) : p(std::move(other.p)) {}
+
+Http::~Http()
+{
+	if (p && p->io_thread.joinable()) {
+		p->io_thread.detach();
+	}
+}
+
+
+Http& Http::size_limit(size_t sizeLimit)
+{
+	if (p) { p->limit = sizeLimit; }
+	return *this;
+}
+
+Http& Http::header(std::string name, const std::string &value)
+{
+	if (!p) { return * this; }
+
+	if (name.size() > 0) {
+		name.append(": ").append(value);
+	} else {
+		name.push_back(':');
+	}
+	p->headerlist = curl_slist_append(p->headerlist, name.c_str());
+	return *this;
+}
+
+Http& Http::remove_header(std::string name)
+{
+	if (p) {
+		name.push_back(':');
+		p->headerlist = curl_slist_append(p->headerlist, name.c_str());
+	}
+
+	return *this;
+}
+
+Http& Http::ca_file(const std::string &name)
+{
+	if (p && priv::ca_file_supported(p->curl)) {
+		::curl_easy_setopt(p->curl, CURLOPT_CAINFO, name.c_str());
+	}
+
+	return *this;
+}
+
+Http& Http::form_add(const std::string &name, const std::string &contents)
+{
+	if (p) {
+		::curl_formadd(&p->form, &p->form_end,
+			CURLFORM_COPYNAME, name.c_str(),
+			CURLFORM_COPYCONTENTS, contents.c_str(),
+			CURLFORM_END
+		);
+	}
+
+	return *this;
+}
+
+Http& Http::form_add_file(const std::string &name, const fs::path &path)
+{
+	if (p) { p->form_add_file(name.c_str(), path.c_str(), nullptr); }
+	return *this;
+}
+
+Http& Http::form_add_file(const std::string &name, const fs::path &path, const std::string &filename)
+{
+	if (p) { p->form_add_file(name.c_str(), path.c_str(), filename.c_str()); }
+	return *this;
+}
+
+Http& Http::set_post_body(const fs::path &path)
+{
+	if (p) { p->set_post_body(path);}
+	return *this;
+}
+
+Http& Http::on_complete(CompleteFn fn)
+{
+	if (p) { p->completefn = std::move(fn); }
+	return *this;
+}
+
+Http& Http::on_error(ErrorFn fn)
+{
+	if (p) { p->errorfn = std::move(fn); }
+	return *this;
+}
+
+Http& Http::on_progress(ProgressFn fn)
+{
+	if (p) { p->progressfn = std::move(fn); }
+	return *this;
+}
+
+Http::Ptr Http::perform()
+{
+	auto self = std::make_shared<Http>(std::move(*this));
+
+	if (self->p) {
+		auto io_thread = std::thread([self](){
+				self->p->http_perform();
+			});
+		self->p->io_thread = std::move(io_thread);
+	}
+
+	return self;
+}
+
+void Http::perform_sync()
+{
+	if (p) { p->http_perform(); }
+}
+
+void Http::cancel()
+{
+	if (p) { p->cancel = true; }
+}
+
+Http Http::get(std::string url)
+{
+	return std::move(Http{std::move(url)});
+}
+
+Http Http::post(std::string url)
+{
+	Http http{std::move(url)};
+	curl_easy_setopt(http.p->curl, CURLOPT_POST, 1L);
+	return http;
+}
+
+bool Http::ca_file_supported()
+{
+	::CURL *curl = ::curl_easy_init();
+	bool res = priv::ca_file_supported(curl);
+	if (curl != nullptr) { ::curl_easy_cleanup(curl); }
+	return res;
+}
+
+std::string Http::url_encode(const std::string &str)
+{
+	::CURL *curl = ::curl_easy_init();
+	if (curl == nullptr) {
+		return str;
+	}
+	char *ce = ::curl_easy_escape(curl, str.c_str(), str.length());
+	std::string encoded = std::string(ce);
+
+	::curl_free(ce);
+	::curl_easy_cleanup(curl);
+
+	return encoded;
+}
+
+std::ostream& operator<<(std::ostream &os, const Http::Progress &progress)
+{
+	os << "Http::Progress("
+		<< "dltotal = " << progress.dltotal
+		<< ", dlnow = " << progress.dlnow
+		<< ", ultotal = " << progress.ultotal
+		<< ", ulnow = " << progress.ulnow
+		<< ")";
+	return os;
+}
+
+
+}

src/slic3r/Utils/Http.hpp

@@ -0,0 +1,115 @@
+#ifndef slic3r_Http_hpp_
+#define slic3r_Http_hpp_
+
+#include <memory>
+#include <string>
+#include <functional>
+#include <boost/filesystem/path.hpp>
+
+
+namespace Slic3r {
+
+
+/// Represetns a Http request
+class Http : public std::enable_shared_from_this<Http> {
+private:
+	struct priv;
+public:
+	struct Progress
+	{
+		size_t dltotal;   // Total bytes to download
+		size_t dlnow;     // Bytes downloaded so far
+		size_t ultotal;   // Total bytes to upload
+		size_t ulnow;     // Bytes uploaded so far
+
+		Progress(size_t dltotal, size_t dlnow, size_t ultotal, size_t ulnow) :
+			dltotal(dltotal), dlnow(dlnow), ultotal(ultotal), ulnow(ulnow)
+		{}
+	};
+
+	typedef std::shared_ptr<Http> Ptr;
+	typedef std::function<void(std::string /* body */, unsigned /* http_status */)> CompleteFn;
+	
+	// A HTTP request may fail at various stages of completeness (URL parsing, DNS lookup, TCP connection, ...).
+	// If the HTTP request could not be made or failed before completion, the `error` arg contains a description
+	// of the error and `http_status` is zero.
+	// If the HTTP request was completed but the response HTTP code is >= 400, `error` is empty and `http_status` contains the response code.
+	// In either case there may or may not be a body.
+	typedef std::function<void(std::string /* body */, std::string /* error */, unsigned /* http_status */)> ErrorFn;
+
+	// See the Progress struct above.
+	// Writing true to the `cancel` reference cancels the request in progress.
+	typedef std::function<void(Progress, bool& /* cancel */)> ProgressFn;
+
+	Http(Http &&other);
+
+	// Note: strings are expected to be UTF-8-encoded
+
+	// These are the primary constructors that create a HTTP object
+	// for a GET and a POST request respectively.
+	static Http get(std::string url);
+	static Http post(std::string url);
+	~Http();
+
+	Http(const Http &) = delete;
+	Http& operator=(const Http &) = delete;
+	Http& operator=(Http &&) = delete;
+
+	// Sets a maximum size of the data that can be received.
+	// A value of zero sets the default limit, which is is 5MB.
+	Http& size_limit(size_t sizeLimit);
+	// Sets a HTTP header field.
+	Http& header(std::string name, const std::string &value);
+	// Removes a header field.
+	Http& remove_header(std::string name);
+	// Sets a CA certificate file for usage with HTTPS. This is only supported on some backends,
+	// specifically, this is supported with OpenSSL and NOT supported with Windows and OS X native certificate store.
+	// See also ca_file_supported().
+	Http& ca_file(const std::string &filename);
+	// Add a HTTP multipart form field
+	Http& form_add(const std::string &name, const std::string &contents);
+	// Add a HTTP multipart form file data contents, `name` is the name of the part
+	Http& form_add_file(const std::string &name, const boost::filesystem::path &path);
+	// Same as above except also override the file's filename with a custom one
+	Http& form_add_file(const std::string &name, const boost::filesystem::path &path, const std::string &filename);
+
+	// Set the file contents as a POST request body.
+	// The data is used verbatim, it is not additionally encoded in any way.
+	// This can be used for hosts which do not support multipart requests.
+	Http& set_post_body(const boost::filesystem::path &path);
+
+	// Callback called on HTTP request complete
+	Http& on_complete(CompleteFn fn);
+	// Callback called on an error occuring at any stage of the requests: Url parsing, DNS lookup,
+	// TCP connection, HTTP transfer, and finally also when the response indicates an error (status >= 400).
+	// Therefore, a response body may or may not be present.
+	Http& on_error(ErrorFn fn);
+	// Callback called on data download/upload prorgess (called fairly frequently).
+	// See the `Progress` structure for description of the data passed.
+	// Writing a true-ish value into the cancel reference parameter cancels the request.
+	Http& on_progress(ProgressFn fn);
+
+	// Starts performing the request in a background thread
+	Ptr perform();
+	// Starts performing the request on the current thread
+	void perform_sync();
+	// Cancels a request in progress
+	void cancel();
+
+	// Tells whether current backend supports seting up a CA file using ca_file()
+	static bool ca_file_supported();
+
+	// converts the given string to an url_encoded_string
+	static std::string url_encode(const std::string &str);
+private:
+	Http(const std::string &url);
+
+	std::unique_ptr<priv> p;
+};
+
+std::ostream& operator<<(std::ostream &, const Http::Progress &);
+
+
+}
+
+#endif

src/slic3r/Utils/OctoPrint.cpp

@@ -0,0 +1,173 @@
+#include "OctoPrint.hpp"
+#include "PrintHostSendDialog.hpp"
+
+#include <algorithm>
+#include <boost/format.hpp>
+#include <boost/log/trivial.hpp>
+
+#include "libslic3r/PrintConfig.hpp"
+#include "Http.hpp"
+
+namespace fs = boost::filesystem;
+
+
+namespace Slic3r {
+
+OctoPrint::OctoPrint(DynamicPrintConfig *config) :
+	host(config->opt_string("print_host")),
+	apikey(config->opt_string("printhost_apikey")),
+	cafile(config->opt_string("printhost_cafile"))
+{}
+
+OctoPrint::~OctoPrint() {}
+
+bool OctoPrint::test(wxString &msg) const
+{
+	// Since the request is performed synchronously here,
+	// it is ok to refer to `msg` from within the closure
+
+	bool res = true;
+	auto url = make_url("api/version");
+
+	BOOST_LOG_TRIVIAL(info) << boost::format("Octoprint: Get version at: %1%") % url;
+
+	auto http = Http::get(std::move(url));
+	set_auth(http);
+	http.on_error([&](std::string body, std::string error, unsigned status) {
+			BOOST_LOG_TRIVIAL(error) << boost::format("Octoprint: Error getting version: %1%, HTTP %2%, body: `%3%`") % error % status % body;
+			res = false;
+			msg = format_error(body, error, status);
+		})
+		.on_complete([&](std::string body, unsigned) {
+			BOOST_LOG_TRIVIAL(debug) << boost::format("Octoprint: Got version: %1%") % body;
+		})
+		.perform_sync();
+
+	return res;
+}
+
+wxString OctoPrint::get_test_ok_msg () const
+{
+	return wxString::Format("%s", _(L("Connection to OctoPrint works correctly.")));
+}
+
+wxString OctoPrint::get_test_failed_msg (wxString &msg) const
+{
+	return wxString::Format("%s: %s\n\n%s",
+						_(L("Could not connect to OctoPrint")), msg, _(L("Note: OctoPrint version at least 1.1.0 is required.")));
+}
+
+bool OctoPrint::send_gcode(const std::string &filename) const
+{
+	enum { PROGRESS_RANGE = 1000 };
+
+	const auto errortitle = _(L("Error while uploading to the OctoPrint server"));
+	fs::path filepath(filename);
+
+	PrintHostSendDialog send_dialog(filepath.filename(), true);
+	if (send_dialog.ShowModal() != wxID_OK) { return false; }
+
+	const bool print = send_dialog.print();
+	const auto upload_filepath = send_dialog.filename();
+	const auto upload_filename = upload_filepath.filename();
+	const auto upload_parent_path = upload_filepath.parent_path();
+
+	wxProgressDialog progress_dialog(
+		_(L("OctoPrint upload")),
+		_(L("Sending G-code file to the OctoPrint server...")),
+		PROGRESS_RANGE, nullptr, wxPD_AUTO_HIDE | wxPD_APP_MODAL | wxPD_CAN_ABORT);
+	progress_dialog.Pulse();
+
+	wxString test_msg;
+	if (!test(test_msg)) {
+		auto errormsg = wxString::Format("%s: %s", errortitle, test_msg);
+		GUI::show_error(&progress_dialog, std::move(errormsg));
+		return false;
+	}
+
+	bool res = true;
+
+	auto url = make_url("api/files/local");
+
+	BOOST_LOG_TRIVIAL(info) << boost::format("Octoprint: Uploading file %1% at %2%, filename: %3%, path: %4%, print: %5%")
+		% filepath.string()
+		% url
+		% upload_filename.string()
+		% upload_parent_path.string()
+		% print;
+
+	auto http = Http::post(std::move(url));
+	set_auth(http);
+	http.form_add("print", print ? "true" : "false")
+		.form_add("path", upload_parent_path.string())
+		.form_add_file("file", filename, upload_filename.string())
+		.on_complete([&](std::string body, unsigned status) {
+			BOOST_LOG_TRIVIAL(debug) << boost::format("Octoprint: File uploaded: HTTP %1%: %2%") % status % body;
+			progress_dialog.Update(PROGRESS_RANGE);
+		})
+		.on_error([&](std::string body, std::string error, unsigned status) {
+			BOOST_LOG_TRIVIAL(error) << boost::format("Octoprint: Error uploading file: %1%, HTTP %2%, body: `%3%`") % error % status % body;
+			auto errormsg = wxString::Format("%s: %s", errortitle, format_error(body, error, status));
+			GUI::show_error(&progress_dialog, std::move(errormsg));
+			res = false;
+		})
+		.on_progress([&](Http::Progress progress, bool &cancel) {
+			if (cancel) {
+				// Upload was canceled
+				res = false;
+			} else if (progress.ultotal > 0) {
+				int value = PROGRESS_RANGE * progress.ulnow / progress.ultotal;
+				cancel = !progress_dialog.Update(std::min(value, PROGRESS_RANGE - 1));    // Cap the value to prevent premature dialog closing
+			} else {
+				cancel = !progress_dialog.Pulse();
+			}
+		})
+		.perform_sync();
+
+	return res;
+}
+
+bool OctoPrint::has_auto_discovery() const
+{
+	return true;
+}
+
+bool OctoPrint::can_test() const
+{
+	return true;
+}
+
+void OctoPrint::set_auth(Http &http) const
+{
+	http.header("X-Api-Key", apikey);
+
+	if (! cafile.empty()) {
+		http.ca_file(cafile);
+	}
+}
+
+std::string OctoPrint::make_url(const std::string &path) const
+{
+	if (host.find("http://") == 0 || host.find("https://") == 0) {
+		if (host.back() == '/') {
+			return (boost::format("%1%%2%") % host % path).str();
+		} else {
+			return (boost::format("%1%/%2%") % host % path).str();
+		}
+	} else {
+		return (boost::format("http://%1%/%2%") % host % path).str();
+	}
+}
+
+wxString OctoPrint::format_error(const std::string &body, const std::string &error, unsigned status)
+{
+	if (status != 0) {
+		auto wxbody = wxString::FromUTF8(body.data());
+		return wxString::Format("HTTP %u: %s", status, wxbody);
+	} else {
+		return wxString::FromUTF8(error.data());
+	}
+}
+
+
+}

src/slic3r/Utils/OctoPrint.hpp

@@ -0,0 +1,42 @@
+#ifndef slic3r_OctoPrint_hpp_
+#define slic3r_OctoPrint_hpp_
+
+#include <string>
+#include <wx/string.h>
+
+#include "PrintHost.hpp"
+
+
+namespace Slic3r {
+
+
+class DynamicPrintConfig;
+class Http;
+
+class OctoPrint : public PrintHost
+{
+public:
+	OctoPrint(DynamicPrintConfig *config);
+	virtual ~OctoPrint();
+
+	bool test(wxString &curl_msg) const;
+	wxString get_test_ok_msg () const;
+	wxString get_test_failed_msg (wxString &msg) const;
+	// Send gcode file to octoprint, filename is expected to be in UTF-8
+	bool send_gcode(const std::string &filename) const;
+	bool has_auto_discovery() const;
+	bool can_test() const;
+private:
+	std::string host;
+	std::string apikey;
+	std::string cafile;
+
+	void set_auth(Http &http) const;
+	std::string make_url(const std::string &path) const;
+	static wxString format_error(const std::string &body, const std::string &error, unsigned status);
+};
+
+
+}
+
+#endif

src/slic3r/Utils/PresetUpdater.cpp

@@ -0,0 +1,633 @@
+#include "PresetUpdater.hpp"
+
+#include <algorithm>
+#include <thread>
+#include <unordered_map>
+#include <ostream>
+#include <stdexcept>
+#include <boost/format.hpp>
+#include <boost/algorithm/string.hpp>
+#include <boost/filesystem.hpp>
+#include <boost/filesystem/fstream.hpp>
+#include <boost/log/trivial.hpp>
+
+#include <wx/app.h>
+#include <wx/event.h>
+#include <wx/msgdlg.h>
+
+#include "libslic3r/libslic3r.h"
+#include "libslic3r/Utils.hpp"
+#include "slic3r/GUI/GUI.hpp"
+#include "slic3r/GUI/PresetBundle.hpp"
+#include "slic3r/GUI/UpdateDialogs.hpp"
+#include "slic3r/GUI/ConfigWizard.hpp"
+#include "slic3r/Utils/Http.hpp"
+#include "slic3r/Config/Version.hpp"
+#include "slic3r/Config/Snapshot.hpp"
+
+namespace fs = boost::filesystem;
+using Slic3r::GUI::Config::Index;
+using Slic3r::GUI::Config::Version;
+using Slic3r::GUI::Config::Snapshot;
+using Slic3r::GUI::Config::SnapshotDB;
+
+
+namespace Slic3r {
+
+
+enum {
+	SLIC3R_VERSION_BODY_MAX = 256,
+};
+
+static const char *INDEX_FILENAME = "index.idx";
+static const char *TMP_EXTENSION = ".download";
+
+
+struct Update
+{
+	fs::path source;
+	fs::path target;
+	Version version;
+
+	Update(fs::path &&source, fs::path &&target, const Version &version) :
+		source(std::move(source)),
+		target(std::move(target)),
+		version(version)
+	{}
+
+	std::string name() const { return source.stem().string(); }
+
+	friend std::ostream& operator<<(std::ostream& os , const Update &self) {
+		os << "Update(" << self.source.string() << " -> " << self.target.string() << ')';
+		return os;
+	}
+};
+
+struct Incompat
+{
+	fs::path bundle;
+	Version version;
+
+	Incompat(fs::path &&bundle, const Version &version) :
+		bundle(std::move(bundle)),
+		version(version)
+	{}
+
+	std::string name() const { return bundle.stem().string(); }
+
+	friend std::ostream& operator<<(std::ostream& os , const Incompat &self) {
+		os << "Incompat(" << self.bundle.string() << ')';
+		return os;
+	}
+};
+
+struct Updates
+{
+	std::vector<Incompat> incompats;
+	std::vector<Update> updates;
+};
+
+
+struct PresetUpdater::priv
+{
+	int version_online_event;
+	std::vector<Index> index_db;
+
+	bool enabled_version_check;
+	bool enabled_config_update;
+	std::string version_check_url;
+	bool had_config_update;
+
+	fs::path cache_path;
+	fs::path rsrc_path;
+	fs::path vendor_path;
+
+	bool cancel;
+	std::thread thread;
+
+	priv(int version_online_event);
+
+	void set_download_prefs(AppConfig *app_config);
+	bool get_file(const std::string &url, const fs::path &target_path) const;
+	void prune_tmps() const;
+	void sync_version() const;
+	void sync_config(const std::set<VendorProfile> vendors) const;
+
+	void check_install_indices() const;
+	Updates get_config_updates() const;
+	void perform_updates(Updates &&updates, bool snapshot = true) const;
+
+	static void copy_file(const fs::path &from, const fs::path &to);
+};
+
+PresetUpdater::priv::priv(int version_online_event) :
+	version_online_event(version_online_event),
+	had_config_update(false),
+	cache_path(fs::path(Slic3r::data_dir()) / "cache"),
+	rsrc_path(fs::path(resources_dir()) / "profiles"),
+	vendor_path(fs::path(Slic3r::data_dir()) / "vendor"),
+	cancel(false)
+{
+	set_download_prefs(GUI::get_app_config());
+	check_install_indices();
+	index_db = std::move(Index::load_db());
+}
+
+// Pull relevant preferences from AppConfig
+void PresetUpdater::priv::set_download_prefs(AppConfig *app_config)
+{
+	enabled_version_check = app_config->get("version_check") == "1";
+	version_check_url = app_config->version_check_url();
+	enabled_config_update = app_config->get("preset_update") == "1" && !app_config->legacy_datadir();
+}
+
+// Downloads a file (http get operation). Cancels if the Updater is being destroyed.
+bool PresetUpdater::priv::get_file(const std::string &url, const fs::path &target_path) const
+{
+	bool res = false;
+	fs::path tmp_path = target_path;
+	tmp_path += (boost::format(".%1%%2%") % get_current_pid() % TMP_EXTENSION).str();
+
+	BOOST_LOG_TRIVIAL(info) << boost::format("Get: `%1%`\n\t-> `%2%`\n\tvia tmp path `%3%`")
+		% url
+		% target_path.string()
+		% tmp_path.string();
+
+	Http::get(url)
+		.on_progress([this](Http::Progress, bool &cancel) {
+			if (cancel) { cancel = true; }
+		})
+		.on_error([&](std::string body, std::string error, unsigned http_status) {
+			(void)body;
+			BOOST_LOG_TRIVIAL(error) << boost::format("Error getting: `%1%`: HTTP %2%, %3%")
+				% url
+				% http_status
+				% error;
+		})
+		.on_complete([&](std::string body, unsigned /* http_status */) {
+			fs::fstream file(tmp_path, std::ios::out | std::ios::binary | std::ios::trunc);
+			file.write(body.c_str(), body.size());
+			file.close();
+			fs::rename(tmp_path, target_path);
+			res = true;
+		})
+		.perform_sync();
+
+	return res;
+}
+
+// Remove leftover paritally downloaded files, if any.
+void PresetUpdater::priv::prune_tmps() const
+{
+	for (fs::directory_iterator it(cache_path); it != fs::directory_iterator(); ++it) {
+		if (it->path().extension() == TMP_EXTENSION) {
+			BOOST_LOG_TRIVIAL(debug) << "Cache prune: " << it->path().string();
+			fs::remove(it->path());
+		}
+	}
+}
+
+// Get Slic3rPE version available online, save in AppConfig.
+void PresetUpdater::priv::sync_version() const
+{
+	if (! enabled_version_check) { return; }
+
+	BOOST_LOG_TRIVIAL(info) << boost::format("Downloading Slic3rPE online version from: `%1%`") % version_check_url;
+
+	Http::get(version_check_url)
+		.size_limit(SLIC3R_VERSION_BODY_MAX)
+		.on_progress([this](Http::Progress, bool &cancel) {
+			cancel = this->cancel;
+		})
+		.on_error([&](std::string body, std::string error, unsigned http_status) {
+			(void)body;
+			BOOST_LOG_TRIVIAL(error) << boost::format("Error getting: `%1%`: HTTP %2%, %3%")
+				% version_check_url
+				% http_status
+				% error;
+		})
+		.on_complete([&](std::string body, unsigned /* http_status */) {
+			boost::trim(body);
+			BOOST_LOG_TRIVIAL(info) << boost::format("Got Slic3rPE online version: `%1%`. Sending to GUI thread...") % body;
+			wxCommandEvent* evt = new wxCommandEvent(version_online_event);
+			evt->SetString(body);
+			GUI::get_app()->QueueEvent(evt);
+		})
+		.perform_sync();
+}
+
+// Download vendor indices. Also download new bundles if an index indicates there's a new one available.
+// Both are saved in cache.
+void PresetUpdater::priv::sync_config(const std::set<VendorProfile> vendors) const
+{
+	BOOST_LOG_TRIVIAL(info) << "Syncing configuration cache";
+
+	if (!enabled_config_update) { return; }
+
+	// Donwload vendor preset bundles
+	for (const auto &index : index_db) {
+		if (cancel) { return; }
+
+		const auto vendor_it = vendors.find(VendorProfile(index.vendor()));
+		if (vendor_it == vendors.end()) {
+			BOOST_LOG_TRIVIAL(warning) << "No such vendor: " << index.vendor();
+			continue;
+		}
+
+		const VendorProfile &vendor = *vendor_it;
+		if (vendor.config_update_url.empty()) {
+			BOOST_LOG_TRIVIAL(info) << "Vendor has no config_update_url: " << vendor.name;
+			continue;
+		}
+
+		// Download a fresh index
+		BOOST_LOG_TRIVIAL(info) << "Downloading index for vendor: " << vendor.name;
+		const auto idx_url = vendor.config_update_url + "/" + INDEX_FILENAME;
+		const auto idx_path = cache_path / (vendor.id + ".idx");
+		if (! get_file(idx_url, idx_path)) { continue; }
+		if (cancel) { return; }
+
+		// Load the fresh index up
+		Index new_index;
+		new_index.load(idx_path);
+
+		// See if a there's a new version to download
+		const auto recommended_it = new_index.recommended();
+		if (recommended_it == new_index.end()) {
+			BOOST_LOG_TRIVIAL(error) << boost::format("No recommended version for vendor: %1%, invalid index?") % vendor.name;
+			continue;
+		}
+		const auto recommended = recommended_it->config_version;
+
+		BOOST_LOG_TRIVIAL(debug) << boost::format("Got index for vendor: %1%: current version: %2%, recommended version: %3%")
+			% vendor.name
+			% vendor.config_version.to_string()
+			% recommended.to_string();
+
+		if (vendor.config_version >= recommended) { continue; }
+
+		// Download a fresh bundle
+		BOOST_LOG_TRIVIAL(info) << "Downloading new bundle for vendor: " << vendor.name;
+		const auto bundle_url = (boost::format("%1%/%2%.ini") % vendor.config_update_url % recommended.to_string()).str();
+		const auto bundle_path = cache_path / (vendor.id + ".ini");
+		if (! get_file(bundle_url, bundle_path)) { continue; }
+		if (cancel) { return; }
+	}
+}
+
+// Install indicies from resources. Only installs those that are either missing or older than in resources.
+void PresetUpdater::priv::check_install_indices() const
+{
+	BOOST_LOG_TRIVIAL(info) << "Checking if indices need to be installed from resources...";
+
+	for (fs::directory_iterator it(rsrc_path); it != fs::directory_iterator(); ++it) {
+		const auto &path = it->path();
+		if (path.extension() == ".idx") {
+			const auto path_in_cache = cache_path / path.filename();
+
+			if (! fs::exists(path_in_cache)) {
+				BOOST_LOG_TRIVIAL(info) << "Install index from resources: " << path.filename();
+				copy_file(path, path_in_cache);
+			} else {
+				Index idx_rsrc, idx_cache;
+				idx_rsrc.load(path);
+				idx_cache.load(path_in_cache);
+
+				if (idx_cache.version() < idx_rsrc.version()) {
+					BOOST_LOG_TRIVIAL(info) << "Update index from resources: " << path.filename();
+					copy_file(path, path_in_cache);
+				}
+			}
+		}
+	}
+}
+
+// Generates a list of bundle updates that are to be performed
+Updates PresetUpdater::priv::get_config_updates() const
+{
+	Updates updates;
+
+	BOOST_LOG_TRIVIAL(info) << "Checking for cached configuration updates...";
+
+	for (const auto idx : index_db) {
+		auto bundle_path = vendor_path / (idx.vendor() + ".ini");
+
+		if (! fs::exists(bundle_path)) {
+			BOOST_LOG_TRIVIAL(info) << "Bundle not present for index, skipping: " << idx.vendor();
+			continue;
+		}
+
+		// Perform a basic load and check the version
+		const auto vp = VendorProfile::from_ini(bundle_path, false);
+
+		const auto ver_current = idx.find(vp.config_version);
+		if (ver_current == idx.end()) {
+			auto message = (boost::format("Preset bundle `%1%` version not found in index: %2%") % idx.vendor() % vp.config_version.to_string()).str();
+			BOOST_LOG_TRIVIAL(error) << message;
+			throw std::runtime_error(message);
+		}
+
+		// Getting a recommended version from the latest index, wich may have been downloaded
+		// from the internet, or installed / updated from the installation resources.
+		const auto recommended = idx.recommended();
+		if (recommended == idx.end()) {
+			BOOST_LOG_TRIVIAL(error) << boost::format("No recommended version for vendor: %1%, invalid index?") % idx.vendor();
+		}
+
+		BOOST_LOG_TRIVIAL(debug) << boost::format("Vendor: %1%, version installed: %2%, version cached: %3%")
+			% vp.name
+			% ver_current->config_version.to_string()
+			% recommended->config_version.to_string();
+
+		if (! ver_current->is_current_slic3r_supported()) {
+			BOOST_LOG_TRIVIAL(warning) << "Current Slic3r incompatible with installed bundle: " << bundle_path.string();
+			updates.incompats.emplace_back(std::move(bundle_path), *ver_current);
+		} else if (recommended->config_version > ver_current->config_version) {
+			// Config bundle update situation
+
+			// Check if the update is already present in a snapshot
+			const auto recommended_snap = SnapshotDB::singleton().snapshot_with_vendor_preset(vp.name, recommended->config_version);
+			if (recommended_snap != SnapshotDB::singleton().end()) {
+				BOOST_LOG_TRIVIAL(info) << boost::format("Bundle update %1% %2% already found in snapshot %3%, skipping...")
+					% vp.name
+					% recommended->config_version.to_string()
+					% recommended_snap->id;
+				continue;
+			}
+
+			auto path_src = cache_path / (idx.vendor() + ".ini");
+			auto path_in_rsrc = rsrc_path / (idx.vendor() + ".ini");
+			if (! fs::exists(path_src)) {
+				if (! fs::exists(path_in_rsrc)) {
+					BOOST_LOG_TRIVIAL(warning) << boost::format("Index for vendor %1% indicates update, but bundle found in neither cache nor resources")
+						% idx.vendor();
+					continue;
+				} else {
+					path_src = std::move(path_in_rsrc);
+					path_in_rsrc.clear();
+				}
+			}
+
+			auto new_vp = VendorProfile::from_ini(path_src, false);
+			bool found = false;
+			if (new_vp.config_version == recommended->config_version) {
+				updates.updates.emplace_back(std::move(path_src), std::move(bundle_path), *recommended);
+				found = true;
+			} else if (! path_in_rsrc.empty() && fs::exists(path_in_rsrc)) {
+				new_vp = VendorProfile::from_ini(path_in_rsrc, false);
+				if (new_vp.config_version == recommended->config_version) {
+					updates.updates.emplace_back(std::move(path_in_rsrc), std::move(bundle_path), *recommended);
+					found = true;
+				}
+			}
+			if (! found)
+				BOOST_LOG_TRIVIAL(warning) << boost::format("Index for vendor %1% indicates update (%2%) but the new bundle was found neither in cache nor resources")
+					% idx.vendor()
+					% recommended->config_version.to_string();
+		}
+	}
+
+	return updates;
+}
+
+void PresetUpdater::priv::perform_updates(Updates &&updates, bool snapshot) const
+{
+	if (updates.incompats.size() > 0) {
+		if (snapshot) {
+			BOOST_LOG_TRIVIAL(info) << "Taking a snapshot...";
+			SnapshotDB::singleton().take_snapshot(*GUI::get_app_config(), Snapshot::SNAPSHOT_DOWNGRADE);
+		}
+
+		BOOST_LOG_TRIVIAL(info) << boost::format("Deleting %1% incompatible bundles") % updates.incompats.size();
+
+		for (const auto &incompat : updates.incompats) {
+			BOOST_LOG_TRIVIAL(info) << '\t' << incompat;
+			fs::remove(incompat.bundle);
+		}
+	}
+	else if (updates.updates.size() > 0) {
+		if (snapshot) {
+			BOOST_LOG_TRIVIAL(info) << "Taking a snapshot...";
+			SnapshotDB::singleton().take_snapshot(*GUI::get_app_config(), Snapshot::SNAPSHOT_UPGRADE);
+		}
+
+		BOOST_LOG_TRIVIAL(info) << boost::format("Performing %1% updates") % updates.updates.size();
+
+		for (const auto &update : updates.updates) {
+			BOOST_LOG_TRIVIAL(info) << '\t' << update;
+
+			copy_file(update.source, update.target);
+
+			PresetBundle bundle;
+			bundle.load_configbundle(update.target.string(), PresetBundle::LOAD_CFGBNDLE_SYSTEM);
+
+			BOOST_LOG_TRIVIAL(info) << boost::format("Deleting %1% conflicting presets")
+				% (bundle.prints.size() + bundle.filaments.size() + bundle.printers.size());
+
+			auto preset_remover = [](const Preset &preset) {
+				BOOST_LOG_TRIVIAL(info) << '\t' << preset.file;
+				fs::remove(preset.file);
+			};
+
+			for (const auto &preset : bundle.prints)    { preset_remover(preset); }
+			for (const auto &preset : bundle.filaments) { preset_remover(preset); }
+			for (const auto &preset : bundle.printers)  { preset_remover(preset); }
+
+			// Also apply the `obsolete_presets` property, removing obsolete ini files
+
+			BOOST_LOG_TRIVIAL(info) << boost::format("Deleting %1% obsolete presets")
+				% (bundle.obsolete_presets.prints.size() + bundle.obsolete_presets.filaments.size() + bundle.obsolete_presets.printers.size());
+
+			auto obsolete_remover = [](const char *subdir, const std::string &preset) {
+				auto path = fs::path(Slic3r::data_dir()) / subdir / preset;
+				path += ".ini";
+				BOOST_LOG_TRIVIAL(info) << '\t' << path.string();
+				fs::remove(path);
+			};
+
+			for (const auto &name : bundle.obsolete_presets.prints)    { obsolete_remover("print", name); }
+			for (const auto &name : bundle.obsolete_presets.filaments) { obsolete_remover("filament", name); }
+			for (const auto &name : bundle.obsolete_presets.filaments) { obsolete_remover("sla_material", name); }
+			for (const auto &name : bundle.obsolete_presets.printers)  { obsolete_remover("printer", name); }
+		}
+	}
+}
+
+void PresetUpdater::priv::copy_file(const fs::path &source, const fs::path &target)
+{
+	static const auto perms = fs::owner_read | fs::owner_write | fs::group_read | fs::others_read;   // aka 644
+
+	// Make sure the file has correct permission both before and after we copy over it
+	if (fs::exists(target)) {
+		fs::permissions(target, perms);
+	}
+	fs::copy_file(source, target, fs::copy_option::overwrite_if_exists);
+	fs::permissions(target, perms);
+}
+
+
+PresetUpdater::PresetUpdater(int version_online_event) :
+	p(new priv(version_online_event))
+{}
+
+
+// Public
+
+PresetUpdater::~PresetUpdater()
+{
+	if (p && p->thread.joinable()) {
+		// This will stop transfers being done by the thread, if any.
+		// Cancelling takes some time, but should complete soon enough.
+		p->cancel = true;
+		p->thread.join();
+	}
+}
+
+void PresetUpdater::sync(PresetBundle *preset_bundle)
+{
+	p->set_download_prefs(GUI::get_app_config());
+	if (!p->enabled_version_check && !p->enabled_config_update) { return; }
+
+	// Copy the whole vendors data for use in the background thread
+	// Unfortunatelly as of C++11, it needs to be copied again
+	// into the closure (but perhaps the compiler can elide this).
+	std::set<VendorProfile> vendors = preset_bundle->vendors;
+
+	p->thread = std::move(std::thread([this, vendors]() {
+		this->p->prune_tmps();
+		this->p->sync_version();
+		this->p->sync_config(std::move(vendors));
+	}));
+}
+
+void PresetUpdater::slic3r_update_notify()
+{
+	if (! p->enabled_version_check) { return; }
+
+	if (p->had_config_update) {
+		BOOST_LOG_TRIVIAL(info) << "New Slic3r version available, but there was a configuration update, notification won't be displayed";
+		return;
+	}
+
+	auto* app_config = GUI::get_app_config();
+	const auto ver_slic3r = Semver::parse(SLIC3R_VERSION);
+	const auto ver_online_str = app_config->get("version_online");
+	const auto ver_online = Semver::parse(ver_online_str);
+	const auto ver_online_seen = Semver::parse(app_config->get("version_online_seen"));
+	if (! ver_slic3r) {
+		throw std::runtime_error("Could not parse Slic3r version string: " SLIC3R_VERSION);
+	}
+
+	if (ver_online) {
+		// Only display the notification if the version available online is newer AND if we haven't seen it before
+		if (*ver_online > *ver_slic3r && (! ver_online_seen || *ver_online_seen < *ver_online)) {
+			GUI::MsgUpdateSlic3r notification(*ver_slic3r, *ver_online);
+			notification.ShowModal();
+			if (notification.disable_version_check()) {
+				app_config->set("version_check", "0");
+				p->enabled_version_check = false;
+			}
+		}
+		app_config->set("version_online_seen", ver_online_str);
+	}
+}
+
+bool PresetUpdater::config_update() const
+{
+	if (! p->enabled_config_update) { return true; }
+
+	auto updates = p->get_config_updates();
+	if (updates.incompats.size() > 0) {
+		BOOST_LOG_TRIVIAL(info) << boost::format("%1% bundles incompatible. Asking for action...") % updates.incompats.size();
+
+		std::unordered_map<std::string, wxString> incompats_map;
+		for (const auto &incompat : updates.incompats) {
+			auto vendor = incompat.name();
+
+			const auto min_slic3r = incompat.version.min_slic3r_version;
+			const auto max_slic3r = incompat.version.max_slic3r_version;
+			wxString restrictions;
+			if (min_slic3r != Semver::zero() && max_slic3r != Semver::inf()) {
+				restrictions = wxString::Format(_(L("requires min. %s and max. %s")),
+					min_slic3r.to_string(),
+					max_slic3r.to_string()
+				);
+			} else if (min_slic3r != Semver::zero()) {
+				restrictions = wxString::Format(_(L("requires min. %s")), min_slic3r.to_string());
+			} else {
+				restrictions = wxString::Format(_(L("requires max. %s")), max_slic3r.to_string());
+			}
+
+			incompats_map.emplace(std::make_pair(std::move(vendor), std::move(restrictions)));
+		}
+
+		p->had_config_update = true;   // This needs to be done before a dialog is shown because of OnIdle() + CallAfter() in Perl
+
+		GUI::MsgDataIncompatible dlg(std::move(incompats_map));
+		const auto res = dlg.ShowModal();
+		if (res == wxID_REPLACE) {
+			BOOST_LOG_TRIVIAL(info) << "User wants to re-configure...";
+			p->perform_updates(std::move(updates));
+			GUI::ConfigWizard wizard(nullptr, GUI::ConfigWizard::RR_DATA_INCOMPAT);
+			if (! wizard.run(GUI::get_preset_bundle(), this)) {
+				return false;
+			}
+			GUI::load_current_presets();
+		} else {
+			BOOST_LOG_TRIVIAL(info) << "User wants to exit Slic3r, bye...";
+			return false;
+		}
+	}
+	else if (updates.updates.size() > 0) {
+		BOOST_LOG_TRIVIAL(info) << boost::format("Update of %1% bundles available. Asking for confirmation ...") % updates.updates.size();
+
+		std::unordered_map<std::string, std::string> updates_map;
+		for (const auto &update : updates.updates) {
+			auto vendor = update.name();
+			auto ver_str = update.version.config_version.to_string();
+			if (! update.version.comment.empty()) {
+				ver_str += std::string(" (") + update.version.comment + ")";
+			}
+			updates_map.emplace(std::make_pair(std::move(vendor), std::move(ver_str)));
+		}
+
+		p->had_config_update = true;   // Ditto, see above
+
+		GUI::MsgUpdateConfig dlg(std::move(updates_map));
+
+		const auto res = dlg.ShowModal();
+		if (res == wxID_OK) {
+			BOOST_LOG_TRIVIAL(debug) << "User agreed to perform the update";
+			p->perform_updates(std::move(updates));
+
+			// Reload global configuration
+			auto *app_config = GUI::get_app_config();
+			GUI::get_preset_bundle()->load_presets(*app_config);
+			GUI::load_current_presets();
+		} else {
+			BOOST_LOG_TRIVIAL(info) << "User refused the update";
+		}
+	} else {
+		BOOST_LOG_TRIVIAL(info) << "No configuration updates available.";
+	}
+
+	return true;
+}
+
+void PresetUpdater::install_bundles_rsrc(std::vector<std::string> bundles, bool snapshot) const
+{
+	Updates updates;
+
+	BOOST_LOG_TRIVIAL(info) << boost::format("Installing %1% bundles from resources ...") % bundles.size();
+
+	for (const auto &bundle : bundles) {
+		auto path_in_rsrc = p->rsrc_path / bundle;
+		auto path_in_vendors = p->vendor_path / bundle;
+		updates.updates.emplace_back(std::move(path_in_rsrc), std::move(path_in_vendors), Version());
+	}
+
+	p->perform_updates(std::move(updates), snapshot);
+}
+
+
+}

src/slic3r/Utils/PresetUpdater.hpp

@@ -0,0 +1,42 @@
+#ifndef slic3r_PresetUpdate_hpp_
+#define slic3r_PresetUpdate_hpp_
+
+#include <memory>
+#include <vector>
+
+namespace Slic3r {
+
+
+class AppConfig;
+class PresetBundle;
+
+class PresetUpdater
+{
+public:
+	PresetUpdater(int version_online_event);
+	PresetUpdater(PresetUpdater &&) = delete;
+	PresetUpdater(const PresetUpdater &) = delete;
+	PresetUpdater &operator=(PresetUpdater &&) = delete;
+	PresetUpdater &operator=(const PresetUpdater &) = delete;
+	~PresetUpdater();
+
+	// If either version check or config updating is enabled, get the appropriate data in the background and cache it.
+	void sync(PresetBundle *preset_bundle);
+
+	// If version check is enabled, check if chaced online slic3r version is newer, notify if so.
+	void slic3r_update_notify();
+
+	// If updating is enabled, check if updates are available in cache, if so, ask about installation.
+	// A false return value implies Slic3r should exit due to incompatibility of configuration.
+	bool config_update() const;
+
+	// "Update" a list of bundles from resources (behaves like an online update).
+	void install_bundles_rsrc(std::vector<std::string> bundles, bool snapshot = true) const;
+private:
+	struct priv;
+	std::unique_ptr<priv> p;
+};
+
+
+}
+#endif