Added a tooltip for the "Slice now" button and changed its behavior according to a hold of Shift

+ some code refactoring

src/slic3r/GUI/GUI_App.cpp

@@ -525,20 +525,7 @@ void GUI_App::save_mode(const /*ConfigOptionMode*/int mode)
 // Update view mode according to selected menu
 void GUI_App::update_mode()
 {
-    wxWindowUpdateLocker noUpdates(&sidebar());
+    sidebar().update_mode();
-
-    const ConfigOptionMode mode = wxGetApp().get_mode();
-
-    obj_list()->get_sizer()->Show(mode > comSimple);
-    sidebar().set_mode_value(mode);
-//    sidebar().show_buttons(mode == comExpert);
-    obj_list()->unselect_objects();
-    obj_list()->update_selections();
-    obj_list()->update_object_menu();
-
-    sidebar().update_mode_sizer(mode);
-
-    sidebar().Layout();
 
     for (auto tab : tabs_list)
         tab->update_visibility();

src/slic3r/GUI/Plater.cpp

@@ -655,7 +655,13 @@ Sidebar::Sidebar(Plater *parent)
 
     // Events
     p->btn_export_gcode->Bind(wxEVT_BUTTON, [this](wxCommandEvent&) { p->plater->export_gcode(); });
-    p->btn_reslice->Bind(wxEVT_BUTTON, [this](wxCommandEvent&) { p->plater->reslice(); });
+    p->btn_reslice->Bind(wxEVT_BUTTON, [this](wxCommandEvent&)
+    {
+        const bool export_gcode_after_slicing = wxGetKeyState(WXK_SHIFT);
+        p->plater->reslice();
+        if (export_gcode_after_slicing)
+            p->plater->export_gcode();
+    });
     p->btn_send_gcode->Bind(wxEVT_BUTTON, [this](wxCommandEvent&) { p->plater->send_gcode(); });
 }
 
@@ -753,9 +759,15 @@ void Sidebar::update_presets(Preset::Type preset_type)
     wxGetApp().preset_bundle->export_selections(*wxGetApp().app_config);
 }
 
-void Sidebar::update_mode_sizer(const Slic3r::ConfigOptionMode& mode)
+void Sidebar::update_mode_sizer() const
 {
-    p->mode_sizer->SetMode(mode);
+    p->mode_sizer->SetMode(m_mode);
+}
+
+void Sidebar::update_reslice_btn_tooltip() const
+{
+    const wxString tooltip = m_mode == comSimple ? wxEmptyString : _(L("Hold Shift to Slice & Export G-code"));
+    p->btn_reslice->SetToolTip(tooltip);
 }
 
 ObjectManipulation* Sidebar::obj_manipul()
@@ -958,6 +970,24 @@ bool Sidebar::is_multifilament()
 }
 
 
+void Sidebar::update_mode()
+{
+    m_mode = wxGetApp().get_mode();
+
+    update_reslice_btn_tooltip();
+    update_mode_sizer();
+
+    wxWindowUpdateLocker noUpdates(this);
+
+    p->object_list->get_sizer()->Show(m_mode > comSimple);
+
+    p->object_list->unselect_objects();
+    p->object_list->update_selections();
+    p->object_list->update_object_menu();
+    
+    Layout();
+}
+
 std::vector<PresetComboBox*>& Sidebar::combos_filament()
 {
     return p->combos_filament;

src/slic3r/GUI/Plater.hpp

@@ -62,7 +62,7 @@ private:
 
 class Sidebar : public wxPanel
 {
-    /*ConfigOptionMode*/int    m_mode;
+    ConfigOptionMode    m_mode;
 public:
     Sidebar(Plater *parent);
     Sidebar(Sidebar &&) = delete;
@@ -74,7 +74,8 @@ public:
     void init_filament_combo(PresetComboBox **combo, const int extr_idx);
     void remove_unused_filament_combos(const int current_extruder_count);
     void update_presets(Slic3r::Preset::Type preset_type);
-    void update_mode_sizer(const Slic3r::ConfigOptionMode& mode);
+    void update_mode_sizer() const;
+    void update_reslice_btn_tooltip() const;
 
     ObjectManipulation*     obj_manipul();
     ObjectList*             obj_list();
@@ -92,7 +93,7 @@ public:
     void                    show_export(bool show) const;
     void                    show_send(bool show) const;
     bool                    is_multifilament();
-    void                    set_mode_value(const /*ConfigOptionMode*/int mode) { m_mode = mode; }
+    void                    update_mode();
 
     std::vector<PresetComboBox*>& combos_filament();
 private: