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.cpp

@@ -12,8 +12,83 @@
 #include <boost/nowide/args.hpp>
 #include <boost/nowide/iostream.hpp>
 
+#include "slic3r/GUI/GUI.hpp"
+
 using namespace Slic3r;
 
+// wxWidgets "Hello world" Program
+// For compilers that support precompilation, includes "wx/wx.h".
+#include <wx/wxprec.h>
+#ifndef WX_PRECOMP
+    #include <wx/wx.h>
+#endif
+class MyApp: public wxApp
+{
+public:
+    virtual bool OnInit();
+};
+class MyFrame: public wxFrame
+{
+public:
+    MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
+private:
+    void OnHello(wxCommandEvent& event);
+    void OnExit(wxCommandEvent& event);
+    void OnAbout(wxCommandEvent& event);
+    wxDECLARE_EVENT_TABLE();
+};
+enum
+{
+    ID_Hello = 1
+};
+wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
+    EVT_MENU(ID_Hello,   MyFrame::OnHello)
+    EVT_MENU(wxID_EXIT,  MyFrame::OnExit)
+    EVT_MENU(wxID_ABOUT, MyFrame::OnAbout)
+wxEND_EVENT_TABLE()
+bool MyApp::OnInit()
+{
+    MyFrame *frame = new MyFrame( "Hello World", wxPoint(50, 50), wxSize(450, 340) );
+    frame->Show( true );
+    return true;
+}
+MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
+        : wxFrame(NULL, wxID_ANY, title, pos, size)
+{
+    wxMenu *menuFile = new wxMenu;
+    menuFile->Append(ID_Hello, "&Hello...\tCtrl-H",
+                     "Help string shown in status bar for this menu item");
+    menuFile->AppendSeparator();
+    menuFile->Append(wxID_EXIT);
+    wxMenu *menuHelp = new wxMenu;
+    menuHelp->Append(wxID_ABOUT);
+    wxMenuBar *menuBar = new wxMenuBar;
+    menuBar->Append( menuFile, "&File" );
+    menuBar->Append( menuHelp, "&Help" );
+    SetMenuBar( menuBar );
+    CreateStatusBar();
+    SetStatusText( "Welcome to wxWidgets!" );
+    Slic3r::Model model;
+    ModelObject *object = model.add_object();
+    SetStatusText(Slic3r::GUI::from_u8("HHuhuh"));
+}
+
+void MyFrame::OnExit(wxCommandEvent& event)
+{
+    Close( true );
+}
+void MyFrame::OnAbout(wxCommandEvent& event)
+{
+    wxMessageBox( "This is a wxWidgets' Hello world sample",
+                  "About Hello World", wxOK | wxICON_INFORMATION );
+}
+void MyFrame::OnHello(wxCommandEvent& event)
+{
+    wxLogMessage("Hello world from wxWidgets!");
+}
+
+
+#if 1
 int
 main(int argc, char **argv)
 {
@@ -176,5 +251,11 @@ main(int argc, char **argv)
     }
 #endif
     
+
+    MyApp *gui = new MyApp();
+
+    MyApp::SetInstance(gui);
+    wxEntry(argc, argv);
     return 0;
 }
+#endif