GCode Preview - Legend texture shown only when gcode is available

xs/src/slic3r/GUI/3DScene.cpp

@@ -1229,6 +1229,11 @@ unsigned int _3DScene::LegendTexture::get_texture_height() const
     return m_tex_height;
 }
 
+void _3DScene::LegendTexture::reset_texture()
+{
+    _destroy_texture();
+}
+
 bool _3DScene::LegendTexture::_create_texture(const Print& print, const wxBitmap& bitmap)
 {
     if ((m_tex_width == 0) || (m_tex_height == 0))
@@ -1270,6 +1275,8 @@ void _3DScene::LegendTexture::_destroy_texture()
     {
         ::glDeleteTextures(1, &m_tex_id);
         m_tex_id = 0;
+        m_tex_height = 0;
+        m_tex_width = 0;
     }
 }
 
@@ -1316,7 +1323,10 @@ void _3DScene::load_gcode_preview(const Print* print, GLVolumeCollection* volume
         _load_gcode_retractions(*print, *volumes, use_VBOs);
         _load_gcode_unretractions(*print, *volumes, use_VBOs);
 
-        _generate_legend_texture(*print);
+        if (volumes->empty())
+            reset_legend_texture();
+        else
+            _generate_legend_texture(*print);
     }
 
     _update_gcode_volumes_visibility(*print, *volumes);
@@ -1337,6 +1347,11 @@ unsigned int _3DScene::get_legend_texture_height()
     return s_legend_texture.get_texture_height();
 }
 
+void _3DScene::reset_legend_texture()
+{
+    s_legend_texture.reset_texture();
+}
+
 // Create 3D thick extrusion lines for a skirt and brim.
 // Adds a new Slic3r::GUI::3DScene::Volume to volumes.
 void _3DScene::_load_print_toolpaths(

xs/src/slic3r/GUI/3DScene.hpp

@@ -403,20 +403,26 @@ class _3DScene
         unsigned int get_texture_width() const;
         unsigned int get_texture_height() const;
 
+        void reset_texture();
+
     private:
         bool _create_texture(const Print& print, const wxBitmap& bitmap);
         void _destroy_texture();
     };
 
     static LegendTexture s_legend_texture;
+
 public:
     static void _glew_init();
 
     static void load_gcode_preview(const Print* print, GLVolumeCollection* volumes, bool use_VBOs);
+
     static unsigned int get_legend_texture_id();
     static unsigned int get_legend_texture_width();
     static unsigned int get_legend_texture_height();
 
+    static void reset_legend_texture();
+
     static void _load_print_toolpaths(
         const Print                     *print,
         GLVolumeCollection              *volumes,

xs/src/slic3r/GUI/GUI.cpp

@@ -191,13 +191,16 @@ void create_preset_tab(const char *name)
 
 void create_combochecklist(wxComboCtrl* comboCtrl, std::string text, std::string items, bool initial_value)
 {
-    wxCheckListBoxComboPopup* popup = new wxCheckListBoxComboPopup(-1);
+    if (comboCtrl == nullptr)
+        return;
+
+    wxCheckListBoxComboPopup* popup = new wxCheckListBoxComboPopup;
     if (popup != nullptr)
     {
         comboCtrl->SetPopupControl(popup);
         popup->SetStringValue(text);
-        popup->Connect(-1, wxEVT_CHECKLISTBOX, wxCommandEventHandler(wxCheckListBoxComboPopup::OnCheckListBox), nullptr, popup);
-        popup->Connect(-1, wxEVT_LISTBOX, wxCommandEventHandler(wxCheckListBoxComboPopup::OnListBoxSelection), nullptr, popup);
+        popup->Connect(wxID_ANY, wxEVT_CHECKLISTBOX, wxCommandEventHandler(wxCheckListBoxComboPopup::OnCheckListBox), nullptr, popup);
+        popup->Connect(wxID_ANY, wxEVT_LISTBOX, wxCommandEventHandler(wxCheckListBoxComboPopup::OnListBoxSelection), nullptr, popup);
 
         std::vector<std::string> items_str;
         boost::split(items_str, items, boost::is_any_of("|"), boost::token_compress_off);

xs/src/slic3r/GUI/wxExtensions.cpp

@@ -1,16 +1,10 @@
 #include "wxExtensions.hpp"
 
-const unsigned int wxCheckListBoxComboPopup::Height = 200;
-
-wxCheckListBoxComboPopup::wxCheckListBoxComboPopup(wxWindowID id)
-    : m_id(id)
-    , m_text(wxEmptyString)
-{
-}
+const unsigned int wxCheckListBoxComboPopup::Height = 210;
 
 bool wxCheckListBoxComboPopup::Create(wxWindow* parent)
 {
-    return wxCheckListBox::Create(parent, m_id, wxPoint(0, 0));
+    return wxCheckListBox::Create(parent, wxID_HIGHEST + 1, wxPoint(0, 0));
 }
 
 wxWindow* wxCheckListBoxComboPopup::GetControl()
@@ -51,6 +45,7 @@ void wxCheckListBoxComboPopup::OnCheckListBox(wxCommandEvent& evt)
     if (cmb != nullptr)
     {
         wxCommandEvent event(wxEVT_CHECKLISTBOX, cmb->GetId());
+        event.SetEventObject(cmb);
         cmb->ProcessWindowEvent(event);
     }
 }
@@ -68,7 +63,6 @@ void wxCheckListBoxComboPopup::OnListBoxSelection(wxCommandEvent& evt)
         wxCommandEvent event(wxEVT_CHECKLISTBOX, GetId());
         event.SetInt(selId);
         event.SetEventObject(this);
-        event.SetString(GetString(selId));
         ProcessEvent(event);
     }
 }

xs/src/slic3r/GUI/wxExtensions.hpp

@@ -8,12 +8,9 @@ class wxCheckListBoxComboPopup : public wxCheckListBox, public wxComboPopup
 {
     static const unsigned int Height;
 
-    wxWindowID m_id;
     wxString m_text;
 
 public:
-    explicit wxCheckListBoxComboPopup(wxWindowID id);
-
     virtual bool Create(wxWindow* parent);
     virtual wxWindow* GetControl();
     virtual void SetStringValue(const wxString& value);

xs/xsp/GUI_3DScene.xsp

@@ -161,7 +161,12 @@ get_legend_texture_height()
         RETVAL = _3DScene::get_legend_texture_height();
     OUTPUT:
         RETVAL
-                
+             
+void
+reset_legend_texture()
+    CODE:
+        _3DScene::reset_legend_texture();
+             
 void
 _load_print_toolpaths(print, volumes, tool_colors, use_VBOs)
         Print               *print;