Merge branch 'master' into lm_sla_supports_auto

src/libslic3r/Config.cpp

@@ -483,8 +483,9 @@ bool DynamicConfig::operator==(const DynamicConfig &rhs) const
     t_options_map::const_iterator it2     = rhs.options.begin();
     t_options_map::const_iterator it2_end = rhs.options.end();
     for (; it1 != it1_end && it2 != it2_end; ++ it1, ++ it2)
-        if (*it1->second != *it2->second)
-            return false;
+		if (it1->first != it2->first || *it1->second != *it2->second)
+			// key or value differ
+			return false;
     return it1 == it1_end && it2 == it2_end;
 }
 

src/libslic3r/GCode/Analyzer.cpp

@@ -668,6 +668,7 @@ void GCodeAnalyzer::_calc_gcode_preview_extrusion_layers(GCodePreviewData& previ
     {
         static GCodePreviewData::Extrusion::Layer& get_layer_at_z(GCodePreviewData::Extrusion::LayersList& layers, float z)
         {
+            //FIXME this has a terrible time complexity
             for (GCodePreviewData::Extrusion::Layer& layer : layers)
             {
                 // if layer found, return it
@@ -863,20 +864,4 @@ size_t GCodeAnalyzer::memory_used() const
     return out;
 }
 
-GCodePreviewData::Color operator + (const GCodePreviewData::Color& c1, const GCodePreviewData::Color& c2)
-{
-    return GCodePreviewData::Color(clamp(0.0f, 1.0f, c1.rgba[0] + c2.rgba[0]),
-        clamp(0.0f, 1.0f, c1.rgba[1] + c2.rgba[1]),
-        clamp(0.0f, 1.0f, c1.rgba[2] + c2.rgba[2]),
-        clamp(0.0f, 1.0f, c1.rgba[3] + c2.rgba[3]));
-}
-
-GCodePreviewData::Color operator * (float f, const GCodePreviewData::Color& color)
-{
-    return GCodePreviewData::Color(clamp(0.0f, 1.0f, f * color.rgba[0]),
-        clamp(0.0f, 1.0f, f * color.rgba[1]),
-        clamp(0.0f, 1.0f, f * color.rgba[2]),
-        clamp(0.0f, 1.0f, f * color.rgba[3]));
-}
-
 } // namespace Slic3r

src/libslic3r/GCode/PreviewData.cpp

@@ -521,4 +521,20 @@ size_t GCodePreviewData::memory_used() const
         sizeof(shell) + sizeof(ranges);
 }
 
+GCodePreviewData::Color operator + (const GCodePreviewData::Color& c1, const GCodePreviewData::Color& c2)
+{
+    return GCodePreviewData::Color(clamp(0.0f, 1.0f, c1.rgba[0] + c2.rgba[0]),
+        clamp(0.0f, 1.0f, c1.rgba[1] + c2.rgba[1]),
+        clamp(0.0f, 1.0f, c1.rgba[2] + c2.rgba[2]),
+        clamp(0.0f, 1.0f, c1.rgba[3] + c2.rgba[3]));
+}
+
+GCodePreviewData::Color operator * (float f, const GCodePreviewData::Color& color)
+{
+    return GCodePreviewData::Color(clamp(0.0f, 1.0f, f * color.rgba[0]),
+        clamp(0.0f, 1.0f, f * color.rgba[1]),
+        clamp(0.0f, 1.0f, f * color.rgba[2]),
+        clamp(0.0f, 1.0f, f * color.rgba[3]));
+}
+
 } // namespace Slic3r

src/libslic3r/GCode/PreviewData.hpp

@@ -22,6 +22,7 @@ public:
         static const Color Dummy;
     };
 
+    // Color mapping from a <min, max> range into a smooth rainbow of 10 colors.
     struct Range
     {
         static const unsigned int Colors_Count = 10;
@@ -45,9 +46,13 @@ public:
 
     struct Ranges
     {
+        // Color mapping by layer height.
         Range height;
+        // Color mapping by extrusion width.
         Range width;
+        // Color mapping by feedrate.
         Range feedrate;
+        // Color mapping by volumetric extrusion rate.
         Range volumetric_rate;
     };
 

src/libslic3r/Technologies.hpp

@@ -42,6 +42,8 @@
 #define ENABLE_TOOLBAR_BACKGROUND_TEXTURE (1 && ENABLE_1_42_0)
 // Renders a small sphere in the center of the bounding box of the current selection when no gizmo is active
 #define ENABLE_RENDER_SELECTION_CENTER (0 && ENABLE_1_42_0)
+// Show visual hints in the 3D scene when sidebar matrix fields have focus
+#define ENABLE_SIDEBAR_VISUAL_HINTS (0 && ENABLE_1_42_0)
 
 #endif // _technologies_h_
 

src/slic3r/CMakeLists.txt

@@ -10,6 +10,8 @@ add_library(libslic3r_gui STATIC
     GUI/AboutDialog.hpp
     GUI/SysInfoDialog.cpp
     GUI/SysInfoDialog.hpp
+    GUI/KBShortcutsDialog.cpp
+    GUI/KBShortcutsDialog.hpp
     GUI/AppConfig.cpp
     GUI/AppConfig.hpp
     GUI/BackgroundSlicingProcess.cpp

src/slic3r/GUI/3DScene.cpp

@@ -1868,6 +1868,130 @@ void _3DScene::point3_to_verts(const Vec3crd& point, double width, double height
 
 GUI::GLCanvas3DManager _3DScene::s_canvas_mgr;
 
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+GLModel::GLModel()
+    : m_useVBOs(false)
+{
+}
+
+GLModel::~GLModel()
+{
+    m_volume.release_geometry();
+}
+
+void GLModel::set_color(float* color, unsigned int size)
+{
+    m_volume.set_render_color(color, size);
+}
+
+void GLModel::set_scale(const Vec3d& scale)
+{
+    m_volume.set_volume_scaling_factor(scale);
+}
+
+void GLModel::render() const
+{
+    if (m_useVBOs)
+        render_VBOs();
+    else
+    {
+    }
+}
+
+void GLModel::render_VBOs() const
+{
+    ::glEnable(GL_BLEND);
+    ::glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+    ::glCullFace(GL_BACK);
+    ::glEnableClientState(GL_VERTEX_ARRAY);
+    ::glEnableClientState(GL_NORMAL_ARRAY);
+
+    GLint current_program_id;
+    ::glGetIntegerv(GL_CURRENT_PROGRAM, &current_program_id);
+    GLint color_id = (current_program_id > 0) ? glGetUniformLocation(current_program_id, "uniform_color") : -1;
+
+    m_volume.render_VBOs(color_id, -1, -1);
+
+    ::glBindBuffer(GL_ARRAY_BUFFER, 0);
+    ::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+
+    ::glDisableClientState(GL_VERTEX_ARRAY);
+    ::glDisableClientState(GL_NORMAL_ARRAY);
+
+    ::glDisable(GL_BLEND);
+}
+
+GLArrow::GLArrow()
+    : GLModel()
+{
+}
+
+bool GLArrow::on_init(bool useVBOs)
+{
+    Pointf3s vertices;
+    std::vector<Vec3crd> triangles;
+
+    // top face
+    vertices.emplace_back(0.5, 0.0, -0.1);
+    vertices.emplace_back(0.5, 2.0, -0.1);
+    vertices.emplace_back(1.0, 2.0, -0.1);
+    vertices.emplace_back(0.0, 3.0, -0.1);
+    vertices.emplace_back(-1.0, 2.0, -0.1);
+    vertices.emplace_back(-0.5, 2.0, -0.1);
+    vertices.emplace_back(-0.5, 0.0, -0.1);
+
+    // bottom face
+    vertices.emplace_back(0.5, 0.0, 0.1);
+    vertices.emplace_back(0.5, 2.0, 0.1);
+    vertices.emplace_back(1.0, 2.0, 0.1);
+    vertices.emplace_back(0.0, 3.0, 0.1);
+    vertices.emplace_back(-1.0, 2.0, 0.1);
+    vertices.emplace_back(-0.5, 2.0, 0.1);
+    vertices.emplace_back(-0.5, 0.0, 0.1);
+
+    // bottom face
+    triangles.emplace_back(0, 6, 1);
+    triangles.emplace_back(6, 5, 1);
+    triangles.emplace_back(5, 4, 3);
+    triangles.emplace_back(5, 3, 1);
+    triangles.emplace_back(1, 3, 2);
+
+    // top face
+    triangles.emplace_back(7, 8, 13);
+    triangles.emplace_back(13, 8, 12);
+    triangles.emplace_back(12, 10, 11);
+    triangles.emplace_back(8, 10, 12);
+    triangles.emplace_back(8, 9, 10);
+
+    // side face
+    triangles.emplace_back(0, 1, 8);
+    triangles.emplace_back(8, 7, 0);
+    triangles.emplace_back(1, 2, 9);
+    triangles.emplace_back(9, 8, 1);
+    triangles.emplace_back(2, 3, 10);
+    triangles.emplace_back(10, 9, 2);
+    triangles.emplace_back(3, 4, 11);
+    triangles.emplace_back(11, 10, 3);
+    triangles.emplace_back(4, 5, 12);
+    triangles.emplace_back(12, 11, 4);
+    triangles.emplace_back(5, 6, 13);
+    triangles.emplace_back(13, 12, 5);
+    triangles.emplace_back(6, 0, 7);
+    triangles.emplace_back(7, 13, 6);
+
+    m_useVBOs = useVBOs;
+
+    if (m_useVBOs)
+        m_volume.indexed_vertex_array.load_mesh_full_shading(TriangleMesh(vertices, triangles));
+    else
+        m_volume.indexed_vertex_array.load_mesh_flat_shading(TriangleMesh(vertices, triangles));
+
+    m_volume.finalize_geometry(m_useVBOs);
+    return true;
+}
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
+
 std::string _3DScene::get_gl_info(bool format_as_html, bool extensions)
 {
     return s_canvas_mgr.get_gl_info(format_as_html, extensions);

src/slic3r/GUI/3DScene.hpp

@@ -18,7 +18,6 @@ class SLAPrintObject;
 enum  SLAPrintObjectStep : unsigned int;
 class Model;
 class ModelObject;
-class GCodePreviewData;
 class DynamicPrintConfig;
 class ExtrusionPath;
 class ExtrusionMultiPath;
@@ -583,6 +582,41 @@ private:
     GLVolumeCollection& operator=(const GLVolumeCollection &);
 };
 
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+class GLModel
+{
+protected:
+    GLVolume m_volume;
+    bool m_useVBOs;
+
+public:
+    GLModel();
+    virtual ~GLModel();
+
+    bool init(bool useVBOs) { return on_init(useVBOs); }
+
+    void set_color(float* color, unsigned int size);
+    void set_scale(const Vec3d& scale);
+
+    void render() const; 
+
+protected:
+    virtual bool on_init(bool useVBOs) = 0;
+
+private:
+    void render_VBOs() const;
+};
+
+class GLArrow : public GLModel
+{
+public:
+    GLArrow();
+
+protected:
+    virtual bool on_init(bool useVBOs);
+};
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
+
 class _3DScene
 {
     static GUI::GLCanvas3DManager s_canvas_mgr;

src/slic3r/GUI/BackgroundSlicingProcess.cpp

@@ -15,8 +15,8 @@
 #include "libslic3r/SLAPrint.hpp"
 #include "libslic3r/Utils.hpp"
 #include "libslic3r/GCode/PostProcessor.hpp"
+#include "libslic3r/GCode/PreviewData.hpp"
 
-//#undef NDEBUG
 #include <cassert>
 #include <stdexcept>
 #include <cctype>
@@ -367,6 +367,13 @@ Print::ApplyStatus BackgroundSlicingProcess::apply(const Model &model, const Dyn
 	assert(m_print != nullptr);
 	assert(config.opt_enum<PrinterTechnology>("printer_technology") == m_print->technology());
 	Print::ApplyStatus invalidated = m_print->apply(model, config);
+	if ((invalidated & PrintBase::APPLY_STATUS_INVALIDATED) != 0 && m_print->technology() == ptFFF &&
+		m_gcode_preview_data != nullptr && ! this->m_fff_print->is_step_done(psGCodeExport)) {
+		// Some FFF status was invalidated, and the G-code was not exported yet.
+		// Let the G-code preview UI know that the final G-code preview is not valid.
+		// In addition, this early memory deallocation reduces memory footprint.
+		m_gcode_preview_data->reset();
+	}
 	return invalidated;
 }
 
@@ -392,7 +399,7 @@ void BackgroundSlicingProcess::schedule_upload(Slic3r::PrintHostJob upload_job)
 	// Guard against entering the export step before changing the export path.
 	tbb::mutex::scoped_lock lock(m_print->state_mutex());
 	this->invalidate_step(bspsGCodeFinalize);
-	m_export_path = std::string();
+	m_export_path.clear();
 	m_upload_job = std::move(upload_job);
 }
 

src/slic3r/GUI/GLCanvas3D.cpp

@@ -1154,6 +1154,12 @@ GLCanvas3D::Selection::VolumeCache::VolumeCache(const Vec3d& position, const Vec
 }
 #endif // ENABLE_MODELVOLUME_TRANSFORM
 
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+const float GLCanvas3D::Selection::RED[3] = { 1.0f, 0.0f, 0.0f };
+const float GLCanvas3D::Selection::GREEN[3] = { 0.0f, 1.0f, 0.0f };
+const float GLCanvas3D::Selection::BLUE[3] = { 0.0f, 0.0f, 1.0f };
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
+
 GLCanvas3D::Selection::Selection()
     : m_volumes(nullptr)
     , m_model(nullptr)
@@ -1183,6 +1189,19 @@ void GLCanvas3D::Selection::set_volumes(GLVolumePtrs* volumes)
     _update_valid();
 }
 
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+bool GLCanvas3D::Selection::init(bool useVBOs)
+{
+    if (m_arrow.init(useVBOs))
+    {
+        m_arrow.set_scale(5.0 * Vec3d::Ones());
+        return true;
+    }
+
+    return false;
+}
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
+
 void GLCanvas3D::Selection::set_model(Model* model)
 {
     m_model = model;
@@ -1530,7 +1549,7 @@ void GLCanvas3D::Selection::start_dragging()
     _set_caches();
 }
 
-void GLCanvas3D::Selection::translate(const Vec3d& displacement)
+void GLCanvas3D::Selection::translate(const Vec3d& displacement, bool local)
 {
     if (!m_valid)
         return;
@@ -1540,7 +1559,7 @@ void GLCanvas3D::Selection::translate(const Vec3d& displacement)
 #if ENABLE_MODELVOLUME_TRANSFORM
     if ((m_mode == Volume) || (*m_volumes)[i]->is_wipe_tower)
     {
-        if (_requires_local_axes())
+        if (local)
             (*m_volumes)[i]->set_volume_offset(m_cache.volumes_data[i].get_volume_position() + displacement);
         else
         {
@@ -1595,7 +1614,7 @@ void GLCanvas3D::Selection::rotate(const Vec3d& rotation, bool local)
         else if (is_single_volume() || is_single_modifier())
 #if ENABLE_WORLD_ROTATIONS
         {
-            if (_requires_local_axes())
+            if (requires_local_axes())
                 (*m_volumes)[i]->set_volume_rotation(rotation);
             else
             {
@@ -2055,6 +2074,55 @@ void GLCanvas3D::Selection::render_center() const
 }
 #endif // ENABLE_RENDER_SELECTION_CENTER
 
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+void GLCanvas3D::Selection::render_sidebar_hints(const std::string& sidebar_field) const
+{
+    if (sidebar_field.empty())
+        return;
+
+    ::glClear(GL_DEPTH_BUFFER_BIT);
+    ::glEnable(GL_DEPTH_TEST);
+
+    ::glEnable(GL_LIGHTING);
+
+    ::glPushMatrix();
+
+    const Vec3d& center = get_bounding_box().center();
+
+    if (is_single_full_instance())
+        ::glTranslated(center(0), center(1), center(2));
+    else if (is_single_volume() || is_single_modifier())
+    {
+        const GLVolume* volume = (*m_volumes)[*m_list.begin()];
+        Transform3d orient_matrix = volume->get_instance_transformation().get_matrix(true, false, true, true) * volume->get_volume_transformation().get_matrix(true, false, true, true);
+        const Vec3d& offset = get_bounding_box().center();
+
+        ::glTranslated(offset(0), offset(1), offset(2));
+        ::glMultMatrixd(orient_matrix.data());
+    }
+    else
+        ::glTranslated(center(0), center(1), center(2));
+
+    if (boost::starts_with(sidebar_field, "position"))
+        _render_sidebar_position_hints(sidebar_field);
+    else if (boost::starts_with(sidebar_field, "rotation"))
+        _render_sidebar_rotation_hints(sidebar_field);
+    else if (boost::starts_with(sidebar_field, "scale"))
+        _render_sidebar_scale_hints(sidebar_field);
+    else if (boost::starts_with(sidebar_field, "size"))
+        _render_sidebar_size_hints(sidebar_field);
+
+    ::glPopMatrix();
+
+    ::glDisable(GL_LIGHTING);
+}
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
+
+bool GLCanvas3D::Selection::requires_local_axes() const
+{
+    return (m_mode == Volume) && is_from_single_instance();
+}
+
 void GLCanvas3D::Selection::_update_valid()
 {
     m_valid = (m_volumes != nullptr) && (m_model != nullptr);
@@ -2457,6 +2525,101 @@ void GLCanvas3D::Selection::_render_bounding_box(const BoundingBoxf3& box, float
     ::glEnd();
 }
 
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+void GLCanvas3D::Selection::_render_sidebar_position_hints(const std::string& sidebar_field) const
+{
+    if (boost::ends_with(sidebar_field, "x"))
+    {
+        ::glRotated(-90.0, 0.0, 0.0, 1.0);
+        _render_sidebar_position_hint(X);
+    }
+    else if (boost::ends_with(sidebar_field, "y"))
+        _render_sidebar_position_hint(Y);
+    else if (boost::ends_with(sidebar_field, "z"))
+    {
+        ::glRotated(90.0, 1.0, 0.0, 0.0);
+        _render_sidebar_position_hint(Z);
+    }
+}
+
+void GLCanvas3D::Selection::_render_sidebar_rotation_hints(const std::string& sidebar_field) const
+{
+}
+
+void GLCanvas3D::Selection::_render_sidebar_scale_hints(const std::string& sidebar_field) const
+{
+    if (boost::ends_with(sidebar_field, "x") || requires_uniform_scale())
+    {
+        ::glPushMatrix();
+        ::glRotated(-90.0, 0.0, 0.0, 1.0);
+        _render_sidebar_scale_hint(X);
+        ::glPopMatrix();
+    }
+
+    if (boost::ends_with(sidebar_field, "y") || requires_uniform_scale())
+    {
+        ::glPushMatrix();
+        _render_sidebar_scale_hint(Y);
+        ::glPopMatrix();
+    }
+
+    if (boost::ends_with(sidebar_field, "z") || requires_uniform_scale())
+    {
+        ::glPushMatrix();
+        ::glRotated(90.0, 1.0, 0.0, 0.0);
+        _render_sidebar_scale_hint(Z);
+        ::glPopMatrix();
+    }
+}
+
+void GLCanvas3D::Selection::_render_sidebar_size_hints(const std::string& sidebar_field) const
+{
+    _render_sidebar_scale_hints(sidebar_field);
+}
+
+void GLCanvas3D::Selection::_render_sidebar_position_hint(Axis axis) const
+{
+    float color[3];
+    switch (axis)
+    {
+    case X: { ::memcpy((void*)color, (const void*)RED, 3 * sizeof(float)); break; }
+    case Y: { ::memcpy((void*)color, (const void*)GREEN, 3 * sizeof(float)); break; }
+    case Z: { ::memcpy((void*)color, (const void*)BLUE, 3 * sizeof(float)); break; }
+    }
+
+    m_arrow.set_color(color, 3);
+    m_arrow.render();
+}
+
+void GLCanvas3D::Selection::_render_sidebar_rotation_hint(Axis axis, double length) const
+{
+}
+
+void GLCanvas3D::Selection::_render_sidebar_scale_hint(Axis axis) const
+{
+    float color[3];
+    switch (axis)
+    {
+    case X: { ::memcpy((void*)color, (const void*)RED, 3 * sizeof(float)); break; }
+    case Y: { ::memcpy((void*)color, (const void*)GREEN, 3 * sizeof(float)); break; }
+    case Z: { ::memcpy((void*)color, (const void*)BLUE, 3 * sizeof(float)); break; }
+    }
+
+    m_arrow.set_color(color, 3);
+
+    ::glTranslated(0.0, 5.0, 0.0);
+    m_arrow.render();
+
+    ::glTranslated(0.0, -10.0, 0.0);
+    ::glRotated(180.0, 0.0, 0.0, 1.0);
+    m_arrow.render();
+}
+
+void GLCanvas3D::Selection::_render_sidebar_size_hint(Axis axis, double length) const
+{
+}
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
+
 void GLCanvas3D::Selection::_synchronize_unselected_instances()
 {
     std::set<unsigned int> done;  // prevent processing volumes twice
@@ -2588,11 +2751,6 @@ void GLCanvas3D::Selection::_ensure_on_bed()
 }
 #endif // ENABLE_ENSURE_ON_BED_WHILE_SCALING
 
-bool GLCanvas3D::Selection::_requires_local_axes() const
-{
-    return (m_mode == Volume) && is_from_single_instance();
-}
-
 const float GLCanvas3D::Gizmos::OverlayIconsScale = 1.0f;
 const float GLCanvas3D::Gizmos::OverlayBorder = 5.0f;
 const float GLCanvas3D::Gizmos::OverlayGapY = 5.0f * OverlayIconsScale;
@@ -3624,6 +3782,7 @@ wxDEFINE_EVENT(EVT_GLCANVAS_RIGHT_CLICK, Vec2dEvent);
 wxDEFINE_EVENT(EVT_GLCANVAS_MODEL_UPDATE, SimpleEvent);
 wxDEFINE_EVENT(EVT_GLCANVAS_REMOVE_OBJECT, SimpleEvent);
 wxDEFINE_EVENT(EVT_GLCANVAS_ARRANGE, SimpleEvent);
+wxDEFINE_EVENT(EVT_GLCANVAS_QUESTION_MARK, SimpleEvent);
 wxDEFINE_EVENT(EVT_GLCANVAS_INCREASE_INSTANCES, Event<int>);
 wxDEFINE_EVENT(EVT_GLCANVAS_INSTANCE_MOVED, SimpleEvent);
 wxDEFINE_EVENT(EVT_GLCANVAS_WIPETOWER_MOVED, Vec3dEvent);
@@ -3787,6 +3946,11 @@ bool GLCanvas3D::init(bool useVBOs, bool use_legacy_opengl)
     if (!_init_toolbar())
         return false;
 
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+    if (!m_selection.init(m_use_VBOs))
+        return false;
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
+
 #if ENABLE_REMOVE_TABS_FROM_PLATER
     post_event(SimpleEvent(EVT_GLCANVAS_INIT));
 #endif // ENABLE_REMOVE_TABS_FROM_PLATER
@@ -4164,6 +4328,10 @@ void GLCanvas3D::render()
     // this position is used later into on_mouse() to drag the objects
     m_mouse.scene_position = _mouse_to_3d(m_mouse.position.cast<int>());
 
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+    _render_selection_sidebar_hints();
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
+
     _render_current_gizmo();
 #if ENABLE_SHOW_CAMERA_TARGET
     _render_camera_target();
@@ -4777,6 +4945,8 @@ void GLCanvas3D::on_char(wxKeyEvent& evt)
                 case 43: { post_event(Event<int>(EVT_GLCANVAS_INCREASE_INSTANCES, +1)); break; }
                 // key -
                 case 45: { post_event(Event<int>(EVT_GLCANVAS_INCREASE_INSTANCES, -1)); break; }
+                // key ?
+                case 63: { post_event(SimpleEvent(EVT_GLCANVAS_QUESTION_MARK)); break; }
                 // key A/a
                 case 65:
                 case 97: { post_event(SimpleEvent(EVT_GLCANVAS_ARRANGE)); break; }
@@ -5668,6 +5838,11 @@ bool GLCanvas3D::_init_toolbar()
     icons_data.icon_border_size = 1;
     icons_data.icon_gap_size = 1;
 
+//    icons_data.filename = "toolbar141.png";
+//    icons_data.icon_size = 52;
+//    icons_data.icon_border_size = 0;
+//    icons_data.icon_gap_size = 0;
+
     BackgroundTexture::Metadata background_data;
     background_data.filename = "toolbar_background.png";
     background_data.left = 16;
@@ -6574,6 +6749,19 @@ void GLCanvas3D::_render_sla_slices() const
     }
 }
 
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+void GLCanvas3D::_render_selection_sidebar_hints() const
+{
+    if (m_use_VBOs)
+        m_shader.start_using();
+
+    m_selection.render_sidebar_hints(m_sidebar_field);
+
+    if (m_use_VBOs)
+        m_shader.stop_using();
+}
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
+
 void GLCanvas3D::_update_volumes_hover_state() const
 {
     for (GLVolume* v : m_volumes.volumes)

src/slic3r/GUI/GLCanvas3D.hpp

@@ -28,6 +28,7 @@ namespace Slic3r {
 class GLShader;
 class ExPolygon;
 class BackgroundSlicingProcess;
+class GCodePreviewData;
 
 namespace GUI {
 
@@ -105,6 +106,7 @@ wxDECLARE_EVENT(EVT_GLCANVAS_RIGHT_CLICK, Vec2dEvent);
 wxDECLARE_EVENT(EVT_GLCANVAS_MODEL_UPDATE, SimpleEvent);
 wxDECLARE_EVENT(EVT_GLCANVAS_REMOVE_OBJECT, SimpleEvent);
 wxDECLARE_EVENT(EVT_GLCANVAS_ARRANGE, SimpleEvent);
+wxDECLARE_EVENT(EVT_GLCANVAS_QUESTION_MARK, SimpleEvent);
 wxDECLARE_EVENT(EVT_GLCANVAS_INCREASE_INSTANCES, Event<int>); // data: +1 => increase, -1 => decrease
 wxDECLARE_EVENT(EVT_GLCANVAS_INSTANCE_MOVED, SimpleEvent);
 wxDECLARE_EVENT(EVT_GLCANVAS_WIPETOWER_MOVED, Vec3dEvent);
@@ -367,6 +369,12 @@ class GLCanvas3D
 public:
     class Selection
     {
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+        static const float RED[3];
+        static const float GREEN[3];
+        static const float BLUE[3];
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
+
     public:
         typedef std::set<unsigned int> IndicesList;
 
@@ -494,6 +502,9 @@ public:
 #if ENABLE_RENDER_SELECTION_CENTER
         GLUquadricObj* m_quadric;
 #endif // ENABLE_RENDER_SELECTION_CENTER
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+        mutable GLArrow m_arrow;
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
 
     public:
         Selection();
@@ -502,6 +513,9 @@ public:
 #endif // ENABLE_RENDER_SELECTION_CENTER
 
         void set_volumes(GLVolumePtrs* volumes);
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+        bool init(bool useVBOs);
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
 
         Model* get_model() const { return m_model; }
         void set_model(Model* model);
@@ -564,7 +578,7 @@ public:
 
         void start_dragging();
 
-        void translate(const Vec3d& displacement);
+        void translate(const Vec3d& displacement, bool local = false);
         void rotate(const Vec3d& rotation, bool local);
         void flattening_rotate(const Vec3d& normal);
         void scale(const Vec3d& scale, bool local);
@@ -579,6 +593,11 @@ public:
 #if ENABLE_RENDER_SELECTION_CENTER
         void render_center() const;
 #endif // ENABLE_RENDER_SELECTION_CENTER
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+        void render_sidebar_hints(const std::string& sidebar_field) const;
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
+
+        bool requires_local_axes() const;
 
     private:
         void _update_valid();
@@ -594,12 +613,21 @@ public:
         void _render_selected_volumes() const;
         void _render_synchronized_volumes() const;
         void _render_bounding_box(const BoundingBoxf3& box, float* color) const;
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+        void _render_sidebar_position_hints(const std::string& sidebar_field) const;
+        void _render_sidebar_rotation_hints(const std::string& sidebar_field) const;
+        void _render_sidebar_scale_hints(const std::string& sidebar_field) const;
+        void _render_sidebar_size_hints(const std::string& sidebar_field) const;
+        void _render_sidebar_position_hint(Axis axis) const;
+        void _render_sidebar_rotation_hint(Axis axis, double length) const;
+        void _render_sidebar_scale_hint(Axis axis) const;
+        void _render_sidebar_size_hint(Axis axis, double length) const;
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
         void _synchronize_unselected_instances();
         void _synchronize_unselected_volumes();
 #if ENABLE_ENSURE_ON_BED_WHILE_SCALING
         void _ensure_on_bed();
 #endif // ENABLE_ENSURE_ON_BED_WHILE_SCALING
-        bool _requires_local_axes() const;
     };
 
     class ClippingPlane
@@ -1054,6 +1082,9 @@ private:
     void _render_camera_target() const;
 #endif // ENABLE_SHOW_CAMERA_TARGET
     void _render_sla_slices() const;
+#if ENABLE_SIDEBAR_VISUAL_HINTS
+    void _render_selection_sidebar_hints() const;
+#endif // ENABLE_SIDEBAR_VISUAL_HINTS
 
     void _update_volumes_hover_state() const;
     void _update_gizmos_data();

src/slic3r/GUI/GLCanvas3DManager.hpp

@@ -19,7 +19,6 @@ class ExPolygon;
 typedef std::vector<ExPolygon> ExPolygons;
 class ModelObject;
 class PrintObject;
-class GCodePreviewData;
 
 namespace GUI {
 

src/slic3r/GUI/GUI.hpp

@@ -16,7 +16,6 @@ namespace Slic3r {
 class AppConfig;
 class DynamicPrintConfig;
 class Print;
-class GCodePreviewData;
 
 namespace GUI {
 

src/slic3r/GUI/GUI_App.cpp

@@ -35,6 +35,7 @@
 #include "Preferences.hpp"
 #include "Tab.hpp"
 #include "SysInfoDialog.hpp"
+#include "KBShortcutsDialog.hpp"
 
 namespace Slic3r {
 namespace GUI {
@@ -301,6 +302,13 @@ void GUI_App::system_info()
     dlg.Destroy();
 }
 
+void GUI_App::keyboard_shortcuts()
+{
+    KBShortcutsDialog dlg;
+    dlg.ShowModal();
+    dlg.Destroy();
+}
+
 // static method accepting a wxWindow object as first parameter
 bool GUI_App::catch_error(std::function<void()> cb,
     //                       wxMessageDialog* message_dialog,
@@ -426,7 +434,7 @@ bool GUI_App::select_language(  wxArrayString & names,
         m_wxLocale = new wxLocale;
         m_wxLocale->Init(identifiers[index]);
         m_wxLocale->AddCatalogLookupPathPrefix(localization_dir());
-        m_wxLocale->AddCatalog(GetAppName());
+        m_wxLocale->AddCatalog(/*GetAppName()*/"Slic3rPE");
         wxSetlocale(LC_NUMERIC, "C");
         Preset::update_suffix_modified();
         return true;
@@ -453,7 +461,7 @@ bool GUI_App::load_language()
             m_wxLocale = new wxLocale;
             m_wxLocale->Init(identifiers[i]);
             m_wxLocale->AddCatalogLookupPathPrefix(localization_dir());
-            m_wxLocale->AddCatalog(GetAppName());
+            m_wxLocale->AddCatalog(/*GetAppName()*/"Slic3rPE");
             wxSetlocale(LC_NUMERIC, "C");
             Preset::update_suffix_modified();
             return true;
@@ -496,7 +504,8 @@ void GUI_App::get_installed_languages(wxArrayString & names, wxArrayLong & ident
         {
             auto full_file_name = dir.GetName() + wxFileName::GetPathSeparator() +
                 filename + wxFileName::GetPathSeparator() +
-                GetAppName() + wxT(".mo");
+                /*GetAppName()*/"Slic3rPE" + 
+                wxT(".mo");
             if (wxFileExists(full_file_name))
             {
                 names.Add(langinfo->Description);

src/slic3r/GUI/GUI_App.hpp

@@ -115,6 +115,7 @@ public:
 
     void            recreate_GUI();
     void            system_info();
+    void            keyboard_shortcuts();
     void            load_project(wxWindow *parent, wxString& input_file);
     void            import_model(wxWindow *parent, wxArrayString& input_files);
     static bool     catch_error(std::function<void()> cb,

src/slic3r/GUI/GUI_ObjectManipulation.cpp

@@ -361,8 +361,9 @@ void ObjectManipulation::update_rotation_value(const Vec3d& rotation)
 void ObjectManipulation::change_position_value(const Vec3d& position)
 {
     auto canvas = wxGetApp().plater()->canvas3D();
-    canvas->get_selection().start_dragging();
-    canvas->get_selection().translate(position - cache_position);
+    GLCanvas3D::Selection& selection = canvas->get_selection();
+    selection.start_dragging();
+    selection.translate(position - cache_position, selection.requires_local_axes());
     canvas->do_move();
 
     cache_position = position;

src/slic3r/GUI/GUI_Preview.cpp

@@ -395,12 +395,6 @@ void Preview::set_number_extruders(unsigned int number_extruders)
     }
 }
 
-void Preview::reset_gcode_preview_data()
-{
-    m_gcode_preview_data->reset();
-    m_canvas->reset_legend_texture();
-}
-
 void Preview::set_canvas_as_dirty()
 {
     m_canvas->set_as_dirty();
@@ -451,6 +445,7 @@ void Preview::load_print()
 void Preview::reload_print(bool force)
 {
     m_canvas->reset_volumes();
+    m_canvas->reset_legend_texture();
     m_loaded = false;
 
     if (!IsShown() && !force)
@@ -759,7 +754,8 @@ void Preview::load_print_as_fff()
 
     // Collect colors per extruder.
     std::vector<std::string> colors;
-    if (!m_gcode_preview_data->empty() || (m_gcode_preview_data->extrusion.view_type == GCodePreviewData::Extrusion::Tool))
+    bool gcode_preview_data_valid = print->is_step_done(psGCodeExport) && ! m_gcode_preview_data->empty();
+    if (gcode_preview_data_valid || (m_gcode_preview_data->extrusion.view_type == GCodePreviewData::Extrusion::Tool))
     {
         const ConfigOptionStrings* extruders_opt = dynamic_cast<const ConfigOptionStrings*>(m_config->option("extruder_colour"));
         const ConfigOptionStrings* filamemts_opt = dynamic_cast<const ConfigOptionStrings*>(m_config->option("filament_colour"));
@@ -785,13 +781,7 @@ void Preview::load_print_as_fff()
         // used to set the sliders to the extremes of the current zs range
         m_force_sliders_full_range = false;
 
-        if (m_gcode_preview_data->empty())
-        {
-            // load skirt and brim
-            m_canvas->load_preview(colors);
-            show_hide_ui_elements("simple");
-        }
-        else
+        if (gcode_preview_data_valid)
         {
             m_force_sliders_full_range = (m_canvas->get_volumes_count() == 0);
             m_canvas->load_gcode_preview(*m_gcode_preview_data, colors);
@@ -805,8 +795,15 @@ void Preview::load_print_as_fff()
                 reset_sliders();
                 m_canvas_widget->Refresh();
             }
+        } 
+        else
+        {
+            // load skirt and brim
+            m_canvas->load_preview(colors);
+            show_hide_ui_elements("simple");
         }
 
+
         if (n_layers > 0)
             update_sliders(m_canvas->get_current_print_zs(true));
 

src/slic3r/GUI/GUI_Preview.hpp

@@ -140,7 +140,6 @@ public:
 #endif // ENABLE_REMOVE_TABS_FROM_PLATER
 
     void set_number_extruders(unsigned int number_extruders);
-    void reset_gcode_preview_data();
     void set_canvas_as_dirty();
     void set_enabled(bool enabled);
     void set_bed_shape(const Pointfs& shape);

src/slic3r/GUI/KBShortcutsDialog.cpp

@@ -0,0 +1,153 @@
+#include "KBShortcutsDialog.hpp"
+#include "I18N.hpp"
+#include "libslic3r/Utils.hpp"
+#include "GUI.hpp"
+#include <wx/scrolwin.h>
+
+namespace Slic3r { 
+namespace GUI {
+
+KBShortcutsDialog::KBShortcutsDialog()
+    : wxDialog(NULL, wxID_ANY, _(L("Slic3r Prusa Edition - Keyboard Shortcuts")), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE|wxRESIZE_BORDER)
+{
+	SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));    
+
+	auto main_sizer = new wxBoxSizer(wxVERTICAL);
+
+    // logo
+	wxBitmap logo_bmp = wxBitmap(from_u8(Slic3r::var("Slic3r_32px.png")), wxBITMAP_TYPE_PNG);
+
+    // fonts
+    wxFont head_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT).Bold();
+    head_font.SetPointSize(19);
+
+    wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+    font.SetPointSize(10);
+    wxFont bold_font = font.Bold();
+#ifdef __WXOSX__
+    font.SetPointSize(12);
+    bold_font.SetPointSize(14);
+#endif /*__WXOSX__*/
+
+    fill_shortcuts();
+
+    auto panel = new wxScrolledWindow(this, wxID_ANY, wxDefaultPosition, wxSize(500, 600));
+    panel->SetScrollbars(0, 20, 1, 2);
+    auto  sizer = new wxBoxSizer(wxVERTICAL);
+    panel->SetSizer(sizer);
+    main_sizer->Add(panel, 1, wxEXPAND | wxALL, 0);
+
+    for (auto& sc : m_full_shortcuts)
+    {
+        wxBoxSizer* hsizer = new wxBoxSizer(wxHORIZONTAL);
+        sizer->Add(hsizer, 0, wxEXPAND | wxTOP, 25);
+
+        // logo
+        auto *logo = new wxStaticBitmap(panel, wxID_ANY, logo_bmp);
+        hsizer->Add(logo, 0, wxEXPAND | wxLEFT | wxRIGHT, 15);
+
+        // head
+        wxStaticText* head = new wxStaticText(panel, wxID_ANY, sc.first, wxDefaultPosition, wxSize(400,-1));
+        head->SetFont(head_font);
+        hsizer->Add(head, 0, wxALIGN_CENTER_VERTICAL);
+
+        // Shortcuts list
+        auto grid_sizer = new wxFlexGridSizer(2, 10, 25);
+        sizer->Add(grid_sizer, 0, wxEXPAND | wxLEFT | wxTOP, 10);
+
+        for (auto pair : sc.second)
+        {
+            auto shortcut = new wxStaticText(panel, wxID_ANY, _(pair.first));
+            shortcut->SetFont(bold_font);
+            grid_sizer->Add(shortcut, -1, wxALIGN_CENTRE_VERTICAL);
+
+            auto description = new wxStaticText(panel, wxID_ANY, _(pair.second));
+            description->SetFont(font);
+            grid_sizer->Add(description, -1, wxALIGN_CENTRE_VERTICAL);
+        }
+    }
+  
+    wxStdDialogButtonSizer* buttons = this->CreateStdDialogButtonSizer(wxOK);
+
+    this->SetEscapeId(wxID_CLOSE);
+    this->Bind(wxEVT_BUTTON, &KBShortcutsDialog::onCloseDialog, this, wxID_OK);
+    main_sizer->Add(buttons, 0, wxEXPAND | wxALL, 15);
+    
+    this->Bind(wxEVT_LEFT_DOWN, &KBShortcutsDialog::onCloseDialog, this);
+
+	SetSizer(main_sizer);
+	main_sizer->SetSizeHints(this);
+}
+
+void KBShortcutsDialog::fill_shortcuts()
+{
+    Shortcuts main_shortcuts;
+    main_shortcuts.reserve(25);
+
+    main_shortcuts.push_back(Shortcut("Ctrl+O",         L("Open project STL/OBJ/AMF/3MF with config, delete bed")));
+    main_shortcuts.push_back(Shortcut("Ctrl+I",         L("Import STL//OBJ/AMF/3MF without config, keep bed")));
+    main_shortcuts.push_back(Shortcut("Ctrl+L",         L("Load Config from .ini/amf/3mf/gcode")));
+    main_shortcuts.push_back(Shortcut("Ctrl+Alt+L",     L("Load Config from .ini/amf/3mf/gcode and merge")));
+    main_shortcuts.push_back(Shortcut("Ctrl+G",         L("Export Gcode")));
+    main_shortcuts.push_back(Shortcut("Ctrl+S",         L("Save project (3MF)")));
+    main_shortcuts.push_back(Shortcut("Ctrl+R",         L("(Re)slice")));
+    main_shortcuts.push_back(Shortcut("Ctrl+U",         L("Quick slice")));
+    main_shortcuts.push_back(Shortcut("Ctrl+Alt+U",     L("Quick slice and Save as")));
+    main_shortcuts.push_back(Shortcut("Ctrl+Shift+U",   L("Repeat last quick slice")));
+    main_shortcuts.push_back(Shortcut("Ctrl+1",         L("Select Plater Tab")));
+    main_shortcuts.push_back(Shortcut("Ctrl+2",         L("Select Print Settings Tab")));
+    main_shortcuts.push_back(Shortcut("Ctrl+3",         L("Select Filament Setting Tab")));
+    main_shortcuts.push_back(Shortcut("Ctrl+4",         L("Select Printer Setting Tab")));
+    main_shortcuts.push_back(Shortcut("Ctrl+5",         L("Switch to 3D")));
+    main_shortcuts.push_back(Shortcut("Ctrl+6",         L("Switch to Preview")));
+    main_shortcuts.push_back(Shortcut("Ctrl+P",         L("Preferences")));
+    main_shortcuts.push_back(Shortcut("0-6",            L("Camera view ")));
+    main_shortcuts.push_back(Shortcut("+",              L("Add Instance to selected object ")));
+    main_shortcuts.push_back(Shortcut("-",              L("Remove Instance from selected object")));
+    main_shortcuts.push_back(Shortcut("?",              L("Show keyboard shortcuts list")));
+    main_shortcuts.push_back(Shortcut("PgUp/PgDn",      L("Switch between 3D and Preview")));
+    main_shortcuts.push_back(Shortcut("Shift+LeftMouse",L("Select multiple object/Move multiple object")));
+
+    m_full_shortcuts.emplace(_(L("Main Shortcuts")),    main_shortcuts);
+
+
+    Shortcuts plater_shortcuts;
+    plater_shortcuts.reserve(20);
+
+    plater_shortcuts.push_back(Shortcut("A",        L("Arrange")));
+    plater_shortcuts.push_back(Shortcut("Ctrl+A",   L("Select All objects")));
+    plater_shortcuts.push_back(Shortcut("Del",      L("Delete selected")));
+    plater_shortcuts.push_back(Shortcut("Ctrl+Del", L("Delete all")));
+    plater_shortcuts.push_back(Shortcut("M",        L("Gizmo move")));
+    plater_shortcuts.push_back(Shortcut("S",        L("Gizmo scale")));
+    plater_shortcuts.push_back(Shortcut("R",        L("Gizmo rotate")));
+    plater_shortcuts.push_back(Shortcut("C",        L("Gizmo cut")));
+    plater_shortcuts.push_back(Shortcut("F",        L("Gizmo Place face on bed")));
+    plater_shortcuts.push_back(Shortcut("L",        L("Gizmo SLA support points")));
+    plater_shortcuts.push_back(Shortcut("B",        L("Zoom to Bed")));
+    plater_shortcuts.push_back(Shortcut("Z",        L("Zoom to all objects in scene, if none selected")));
+    plater_shortcuts.push_back(Shortcut("Z",        L("Zoom to selected object")));
+    plater_shortcuts.push_back(Shortcut("I",        L("Zoom in")));
+    plater_shortcuts.push_back(Shortcut("O",        L("Zoom out")));
+    plater_shortcuts.push_back(Shortcut("ESC",      L("Unselect gizmo, keep object selection")));
+
+    m_full_shortcuts.emplace(_(L("Plater Shortcuts")),  plater_shortcuts);
+
+
+    Shortcuts preview_shortcuts;
+    preview_shortcuts.reserve(2);
+
+    preview_shortcuts.push_back(Shortcut(L("Arrow Up"),     L("Upper Layer")));
+    preview_shortcuts.push_back(Shortcut(L("Arrow Down"),   L("Lower Layer")));
+
+    m_full_shortcuts.emplace(_(L("Preview Shortcuts")), preview_shortcuts);
+}
+
+void KBShortcutsDialog::onCloseDialog(wxEvent &)
+{
+    this->EndModal(wxID_CLOSE);
+    this->Close();
+}
+
+} // namespace GUI
+} // namespace Slic3r

src/slic3r/GUI/KBShortcutsDialog.hpp

@@ -0,0 +1,32 @@
+#ifndef slic3r_GUI_KBShortcutsDialog_hpp_
+#define slic3r_GUI_KBShortcutsDialog_hpp_
+
+#include <wx/wx.h>
+#include <map>
+
+namespace Slic3r { 
+namespace GUI {
+
+class KBShortcutsDialog : public wxDialog
+{
+    typedef std::pair<std::string, std::string> Shortcut;
+    typedef std::vector< Shortcut >             Shortcuts;
+    typedef std::map<wxString, Shortcuts>       ShortcutsMap;
+
+    wxString text_info {wxEmptyString};
+
+    ShortcutsMap m_full_shortcuts;
+
+public:
+    KBShortcutsDialog();
+    
+    void fill_shortcuts();
+
+private:
+    void onCloseDialog(wxEvent &);
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif

src/slic3r/GUI/MainFrame.cpp

@@ -432,6 +432,9 @@ void MainFrame::init_menubar()
             [this](wxCommandEvent&) { wxLaunchDefaultBrowser("http://github.com/prusa3d/slic3r/issues/new"); });
         append_menu_item(helpMenu, wxID_ANY, _(L("About Slic3r")), _(L("Show about dialog")),
             [this](wxCommandEvent&) { Slic3r::GUI::about(); });
+        helpMenu->AppendSeparator();
+        append_menu_item(helpMenu, wxID_ANY, _(L("Keyboard Shortcuts")) + "\t?", _(L("Show the list of the keyboard shortcuts")),
+            [this](wxCommandEvent&) { wxGetApp().keyboard_shortcuts(); });
     }
 
     // menubar

src/slic3r/GUI/Plater.cpp

@@ -1186,6 +1186,7 @@ Plater::priv::priv(Plater *q, MainFrame *main_frame)
     view3D_canvas->Bind(EVT_GLCANVAS_MODEL_UPDATE, [this](SimpleEvent&) { this->schedule_background_process(); });
     view3D_canvas->Bind(EVT_GLCANVAS_REMOVE_OBJECT, [q](SimpleEvent&) { q->remove_selected(); });
     view3D_canvas->Bind(EVT_GLCANVAS_ARRANGE, [this](SimpleEvent&) { arrange(); });
+    view3D_canvas->Bind(EVT_GLCANVAS_QUESTION_MARK, [this](SimpleEvent&) { wxGetApp().keyboard_shortcuts(); });
     view3D_canvas->Bind(EVT_GLCANVAS_INCREASE_INSTANCES, [this](Event<int> &evt) 
         { if (evt.data == 1) this->q->increase_instances(); else if (this->can_decrease_instances()) this->q->decrease_instances(); });
     view3D_canvas->Bind(EVT_GLCANVAS_INSTANCE_MOVED, [this](SimpleEvent&) { update(); });
@@ -1273,7 +1274,6 @@ void Plater::priv::update(bool force_full_scene_refresh)
 #else
     this->canvas3D->reload_scene(false, force_full_scene_refresh);
 #endif // ENABLE_REMOVE_TABS_FROM_PLATER
-    preview->reset_gcode_preview_data();
     preview->reload_print();
 
     this->schedule_background_process();
@@ -2010,7 +2010,6 @@ unsigned int Plater::priv::update_background_process()
         this->sidebar->show_sliced_info_sizer(false);
         // Reset preview canvases. If the print has been invalidated, the preview canvases will be cleared.
         // Otherwise they will be just refreshed.
-        this->gcode_preview_data.reset();
         switch (this->printer_technology) {
         case ptFFF:
             if (this->preview != nullptr)

src/slic3r/GUI/Tab.cpp

@@ -1551,7 +1551,7 @@ void TabPrinter::build_printhost(ConfigOptionsGroup *optgroup)
 
 	auto printhost_browse = [this, optgroup] (wxWindow* parent) {
 
-		// TODO: SLA
+		// TODO: SLA Bonjour
 
 		auto btn = m_printhost_browse_btn = new wxButton(parent, wxID_ANY, _(L(" Browse "))+dots, wxDefaultPosition, wxDefaultSize, wxBU_LEFT);
 		btn->SetBitmap(wxBitmap(from_u8(Slic3r::var("zoom.png")), wxBITMAP_TYPE_PNG));
@@ -1562,6 +1562,7 @@ void TabPrinter::build_printhost(ConfigOptionsGroup *optgroup)
 			BonjourDialog dialog(parent);
 			if (dialog.show_and_lookup()) {
 				optgroup->set_value("print_host", std::move(dialog.get_selected()), true);
+				// FIXME: emit killfocus on the edit widget
 			}
 		});
 

src/slic3r/Utils/Duet.hpp

@@ -19,12 +19,12 @@ 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;
-	bool upload(PrintHostUpload upload_data, Http::ProgressFn prorgess_fn, Http::ErrorFn error_fn) const;
-	bool has_auto_discovery() const;
-	bool can_test() const;
+	virtual bool test(wxString &curl_msg) const;
+	virtual wxString get_test_ok_msg () const;
+	virtual wxString get_test_failed_msg (wxString &msg) const;
+	virtual bool upload(PrintHostUpload upload_data, Http::ProgressFn prorgess_fn, Http::ErrorFn error_fn) const;
+	virtual bool has_auto_discovery() const;
+	virtual bool can_test() const;
 	virtual std::string get_host() const { return host; }
 private:
 	std::string host;

src/slic3r/Utils/OctoPrint.cpp

@@ -1,8 +1,12 @@
 #include "OctoPrint.hpp"
 
 #include <algorithm>
+#include <sstream>
 #include <boost/format.hpp>
 #include <boost/log/trivial.hpp>
+#include <boost/property_tree/ptree.hpp>
+#include <boost/property_tree/json_parser.hpp>
+#include <boost/algorithm/string/predicate.hpp>
 
 #include <wx/progdlg.h>
 
@@ -12,6 +16,7 @@
 
 
 namespace fs = boost::filesystem;
+namespace pt = boost::property_tree;
 
 
 namespace Slic3r {
@@ -41,11 +46,29 @@ bool OctoPrint::test(wxString &msg) const
             res = false;
             msg = format_error(body, error, status);
         })
-        .on_complete([&](std::string body, unsigned) {
+        .on_complete([&, this](std::string body, unsigned) {
             BOOST_LOG_TRIVIAL(debug) << boost::format("Octoprint: Got version: %1%") % body;
 
-            // TODO: parse body, call validate_version_text
+            try {
+                std::stringstream ss(body);
+                pt::ptree ptree;
+                pt::read_json(ss, ptree);
 
+                if (! ptree.get_optional<std::string>("api")) {
+                    res = false;
+                    return;
+                }
+
+                const auto text = ptree.get_optional<std::string>("text");
+                res = validate_version_text(text);
+                if (! res) {
+                    msg = wxString::Format("Mismatched type of print host: %s", text ? *text : "OctoPrint");
+                }
+            }
+            catch (...) {
+                res = false;
+                msg = "Could not parse server response";
+            }
         })
         .perform_sync();
 
@@ -71,7 +94,7 @@ bool OctoPrint::upload(PrintHostUpload upload_data, Http::ProgressFn prorgess_fn
     wxString test_msg;
     if (! test(test_msg)) {
 
-        // TODO:
+        // FIXME:
 
         // auto errormsg = wxString::Format("%s: %s", errortitle, test_msg);
         // GUI::show_error(&progress_dialog, std::move(errormsg));
@@ -125,10 +148,9 @@ bool OctoPrint::can_test() const
     return true;
 }
 
-bool OctoPrint::validate_version_text(const std::string &version_text)
+bool OctoPrint::validate_version_text(const boost::optional<std::string> &version_text) const
 {
-    // FIXME
-    return true;
+    return version_text ? boost::starts_with(*version_text, "OctoPrint") : true;
 }
 
 void OctoPrint::set_auth(Http &http) const
@@ -164,14 +186,23 @@ wxString OctoPrint::format_error(const std::string &body, const std::string &err
 }
 
 
-// SL1
+// SLAHost
 
-SL1Host::~SL1Host() {}
+SLAHost::~SLAHost() {}
 
-bool SL1Host::validate_version_text(const std::string &version_text)
+wxString SLAHost::get_test_ok_msg () const
 {
-    // FIXME
-    return true;
+    return wxString::Format("%s", _(L("Connection to Prusa SLA works correctly.")));
+}
+
+wxString SLAHost::get_test_failed_msg (wxString &msg) const
+{
+    return wxString::Format("%s: %s", _(L("Could not connect to Prusa SLA")), msg);
+}
+
+bool SLAHost::validate_version_text(const boost::optional<std::string> &version_text) const
+{
+    return version_text ? boost::starts_with(*version_text, "Prusa SLA") : false;
 }
 
 

src/slic3r/Utils/OctoPrint.hpp

@@ -3,6 +3,7 @@
 
 #include <string>
 #include <wx/string.h>
+#include <boost/optional.hpp>
 
 #include "PrintHost.hpp"
 
@@ -19,16 +20,16 @@ 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;
-    bool upload(PrintHostUpload upload_data, Http::ProgressFn prorgess_fn, Http::ErrorFn error_fn) const;
-    bool has_auto_discovery() const;
-    bool can_test() const;
+    virtual bool test(wxString &curl_msg) const;
+    virtual wxString get_test_ok_msg () const;
+    virtual wxString get_test_failed_msg (wxString &msg) const;
+    virtual bool upload(PrintHostUpload upload_data, Http::ProgressFn prorgess_fn, Http::ErrorFn error_fn) const;
+    virtual bool has_auto_discovery() const;
+    virtual bool can_test() const;
     virtual std::string get_host() const { return host; }
 
 protected:
-    virtual bool validate_version_text(const std::string &version_text);
+    virtual bool validate_version_text(const boost::optional<std::string> &version_text) const;
 
 private:
     std::string host;
@@ -41,14 +42,16 @@ private:
 };
 
 
-class SL1Host: public OctoPrint
+class SLAHost: public OctoPrint
 {
 public:
-    SL1Host(DynamicPrintConfig *config) : OctoPrint(config) {}
-    virtual ~SL1Host();
+    SLAHost(DynamicPrintConfig *config) : OctoPrint(config) {}
+    virtual ~SLAHost();
 
+    virtual wxString get_test_ok_msg () const;
+    virtual wxString get_test_failed_msg (wxString &msg) const;
 protected:
-    virtual bool validate_version_text(const std::string &version_text);
+    virtual bool validate_version_text(const boost::optional<std::string> &version_text) const;
 };
 
 

src/slic3r/Utils/PrintHost.cpp

@@ -30,8 +30,8 @@ PrintHost* PrintHost::get_print_host(DynamicPrintConfig *config)
 
     switch (opt->value) {
         case htOctoPrint: return new OctoPrint(config);
-        case htSL1:       return new SL1Host(config);
         case htDuet:      return new Duet(config);
+        case htSL1:       return new SLAHost(config);
         default: return nullptr;
     }
 }