FIX: fix serveral issues in multi-plate slicing

1. fix the thumbnail white issue in some random case
2. fix the thumbnail not update issue under preview panel
3. fix the previous panel's toolpath not clear issue while switch panel
   under preview
4. fix the toolpath not clear issue while switch from 3d to preview in
   some corner case

Change-Id: I158eba35e3b5d8a1e77f19ee9f86801e6a6dbd86

src/libslic3r/GCode/ThumbnailData.cpp

@@ -12,6 +12,7 @@ void ThumbnailData::set(unsigned int w, unsigned int h)
         width = w;
         height = h;
         // defaults to white texture
+        pixels.clear();
         pixels = std::vector<unsigned char>(width * height * 4, 255);
     }
 }

src/slic3r/GUI/GLCanvas3D.cpp

@@ -4183,7 +4183,7 @@ void GLCanvas3D::on_set_focus(wxFocusEvent& evt)
     m_tooltip_enabled = false;
     if (m_canvas_type == ECanvasType::CanvasPreview) {
         // update thumbnails and update plate toolbar
-        wxGetApp().plater()->update_platplate_thumbnails();
+        wxGetApp().plater()->update_all_plate_thumbnails();
         _update_imgui_select_plate_toolbar();
     }
     _refresh_if_shown_on_screen();

src/slic3r/GUI/Plater.cpp

@@ -1997,7 +1997,7 @@ struct Plater::priv
     void init_notification_manager();
 
     // Caching last value of show_action_buttons parameter for show_action_buttons(), so that a callback which does not know this state will not override it.
-    mutable bool    			ready_to_slice = { false };
+    //mutable bool    			ready_to_slice = { false };
     // Flag indicating that the G-code export targets a removable device, therefore the show_action_buttons() needs to be called at any case when the background processing finishes.
     ExportingStatus             exporting_status { NOT_EXPORTING };
     std::string                 last_output_path;
@@ -2503,6 +2503,12 @@ void Plater::priv::update(unsigned int flags)
     this->preview->reload_print();
     //BBS assemble view
     this->assemble_view->reload_scene(false, flags);
+
+    if (current_panel && q->is_preview_shown()) {
+        q->force_update_all_plate_thumbnails();
+        //update_fff_scene_only_shells(true);
+    }
+
     if (force_background_processing_restart)
         this->restart_background_process(update_status);
     else
@@ -4224,7 +4230,7 @@ unsigned int Plater::priv::update_background_process(bool force_validation, bool
         PartPlate* cur_plate = background_process.get_current_plate();
         if (background_process.finished() && cur_plate && cur_plate->is_slice_result_valid())
         {
-            ready_to_slice = false;
+            //ready_to_slice = false;
             this->main_frame->update_slice_print_status(MainFrame::eEventSliceUpdate, false);
         }
         else if (!background_process.empty() &&
@@ -4233,8 +4239,16 @@ unsigned int Plater::priv::update_background_process(bool force_validation, bool
                                                  * when this function is called several times during calculations
                                                  * */
         {
-            ready_to_slice = true;
+            if (cur_plate->can_slice()) {
+                //ready_to_slice = true;
                 this->main_frame->update_slice_print_status(MainFrame::eEventSliceUpdate, true);
+                process_completed_with_error = -1;
+            }
+            else {
+                //ready_to_slice = false;
+                this->main_frame->update_slice_print_status(MainFrame::eEventSliceUpdate, false);
+                process_completed_with_error = partplate_list.get_curr_plate_index();
+            }
         }
 #if 0
         //sidebar->set_btn_label(ActionButtonType::abExport, _(label_btn_export));
@@ -5055,7 +5069,10 @@ void Plater::priv::set_current_panel(wxPanel* panel, bool no_slice)
             }
             else {
                 BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(": single slice, reload print");
+                if (model_fits)
                     this->preview->reload_print(true);
+                else
+                    this->update_fff_scene_only_shells();
             }
 
             preview->set_as_dirty();
@@ -5160,6 +5177,7 @@ void Plater::priv::set_current_panel(wxPanel* panel, bool no_slice)
             notification_manager->set_in_preview(false);
     }
     else if (current_panel == preview) {
+        q->invalid_all_plate_thumbnails();
         if (old_panel == view3D)
             view3D->get_canvas3d()->unbind_event_handlers();
         else if (old_panel == assemble_view)
@@ -6016,8 +6034,8 @@ void Plater::priv::on_repair_model(wxCommandEvent &event)
 
 void Plater::priv::on_filament_color_changed(wxCommandEvent &event)
 {
-    q->update_platplate_thumbnails(true);
+    //q->update_all_plate_thumbnails(true);
-    q->get_preview_canvas3D()->update_plate_thumbnails();
+    //q->get_preview_canvas3D()->update_plate_thumbnails();
 }
 
 void Plater::priv::install_network_plugin(wxCommandEvent &event)
@@ -7742,17 +7760,33 @@ wxString Plater::get_project_name()
     return p->get_project_name();
 }
 
-void Plater::update_platplate_thumbnails(bool force_update)
+void Plater::update_all_plate_thumbnails(bool force_update)
 {
     for (int i = 0; i < get_partplate_list().get_plate_count(); i++) {
         PartPlate* plate = get_partplate_list().get_plate(i);
         ThumbnailsParams thumbnail_params = { {}, false, true, true, true, i};
-        if (force_update || !plate->is_valid_gcode_file()) {
+        if (force_update || !plate->thumbnail_data.is_valid()) {
             get_view3D_canvas3D()->render_thumbnail(plate->thumbnail_data, plate->plate_thumbnail_width, plate->plate_thumbnail_height, thumbnail_params, Camera::EType::Ortho);
         }
     }
 }
 
+//invalid all plate's thumbnails
+void Plater::invalid_all_plate_thumbnails()
+{
+    for (int i = 0; i < get_partplate_list().get_plate_count(); i++) {
+        PartPlate* plate = get_partplate_list().get_plate(i);
+        plate->thumbnail_data.reset();
+    }
+}
+
+void Plater::force_update_all_plate_thumbnails()
+{
+    invalid_all_plate_thumbnails();
+    update_all_plate_thumbnails(true);
+    get_preview_canvas3D()->update_plate_thumbnails();
+}
+
 // BBS: backup
 std::vector<size_t> Plater::load_files(const std::vector<fs::path>& input_files, LoadStrategy strategy, bool ask_multi) { return p->load_files(input_files, strategy, ask_multi); }
 
@@ -9388,13 +9422,13 @@ void Plater::reslice()
     // BBS
     if (p->background_process.running())
     {
-        p->ready_to_slice = false;
+        //p->ready_to_slice = false;
         p->main_frame->update_slice_print_status(MainFrame::eEventSliceUpdate, false);
         BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(": background process is running, m_is_slicing is true");
     }
     else if (!p->background_process.empty() && !p->background_process.idle()) {
         //p->show_action_buttons(true);
-        p->ready_to_slice = true;
+        //p->ready_to_slice = true;
         p->main_frame->update_slice_print_status(MainFrame::eEventSliceUpdate, true);
         BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(": background process changes to not_idle, set ready_to_slice back to true");
     }
@@ -10349,7 +10383,7 @@ void Plater::apply_background_progress()
     if (invalidated & PrintBase::APPLY_STATUS_INVALIDATED)
     {
         part_plate->update_slice_result_valid_state(false);
-        p->ready_to_slice = true;
+        //p->ready_to_slice = true;
         p->main_frame->update_slice_print_status(MainFrame::eEventPlateUpdate, true);
     }
 }
@@ -10417,14 +10451,14 @@ int Plater::select_plate(int plate_index, bool need_slice)
                     part_plate->update_slice_result_valid_state(false);
                     // BBS
                     //p->show_action_buttons(true);
-                    p->ready_to_slice = true;
+                    //p->ready_to_slice = true;
                     p->main_frame->update_slice_print_status(MainFrame::eEventPlateUpdate, true);
                 }
                 else
                 {
                     // BBS
                     //p->show_action_buttons(false);
-                    p->ready_to_slice = false;
+                    //p->ready_to_slice = false;
                     p->main_frame->update_slice_print_status(MainFrame::eEventPlateUpdate, false);
 
                     refresh_print();
@@ -10434,38 +10468,52 @@ int Plater::select_plate(int plate_index, bool need_slice)
         else
         {
             //check inside status
-            bool model_fits = p->view3D->get_canvas3d()->check_volumes_outside_state() != ModelInstancePVS_Partly_Outside;
+            //model_fits = p->view3D->get_canvas3d()->check_volumes_outside_state() != ModelInstancePVS_Partly_Outside;
             //bool validate_err = false;
-            if (is_preview_shown())
-            {
-                if (need_slice)
-                {
-                    p->process_completed_with_error = -1;
-                    p->m_slice_all = false;
-                    reset_gcode_toolpaths();
-                    if (model_fits)
-                        reslice();
-                    else {
-                        p->ready_to_slice = false;
-                        p->main_frame->update_slice_print_status(MainFrame::eEventPlateUpdate, false);
-                        refresh_print();
-                    }
-                }
-            }
-            else
-            {
             validate_current_plate(model_fits, validate_err);
-                //check inside status
+            if (model_fits && !validate_err) {
-                if (model_fits && !validate_err){
                 p->process_completed_with_error = -1;
             }
             else {
                 p->process_completed_with_error = p->partplate_list.get_curr_plate_index();
             }
+            if (is_preview_shown())
+            {
+                if (need_slice)
+                {
+                    //p->process_completed_with_error = -1;
+                    p->m_slice_all = false;
+                    reset_gcode_toolpaths();
+                    if (model_fits && !validate_err)
+                        reslice();
+                    else {
+                        p->main_frame->update_slice_print_status(MainFrame::eEventPlateUpdate, false);
+                        //sometimes the previous print's sliced result is still valid, but the newly added object is laid over the boundary
+                        //then the print toolpath will be shown, so we should not refresh print here, only onload shell
+                        //refresh_print();
+                        p->update_fff_scene_only_shells();
+                    }
+                }
+                else {
+                    //p->ready_to_slice = false;
+                    p->main_frame->update_slice_print_status(MainFrame::eEventPlateUpdate, false);
+                    refresh_print();
+                }
+            }
+            else
+            {
+                //validate_current_plate(model_fits, validate_err);
+                //check inside status
+                /*if (model_fits && !validate_err){
+                    p->process_completed_with_error = -1;
+                }
+                else {
+                    p->process_completed_with_error = p->partplate_list.get_curr_plate_index();
+                }*/
 
                 // BBS: don't show action buttons
                 //p->show_action_buttons(true);
-                p->ready_to_slice = true;
+                //p->ready_to_slice = true;
                 if (model_fits && part_plate->has_printable_instances())
                 {
                     //p->view3D->get_canvas3d()->post_event(Event<bool>(EVT_GLCANVAS_ENABLE_ACTION_BUTTONS, true));
@@ -10511,6 +10559,8 @@ void Plater::validate_current_plate(bool& model_fits, bool& validate_error)
     model_fits = p->view3D->get_canvas3d()->check_volumes_outside_state() != ModelInstancePVS_Partly_Outside;
     validate_error = false;
     if (p->printer_technology == ptFFF) {
+        std::string plater_text = _u8L("An object is laid over the boundary of plate or exceeds the height limit.\n"
+                    "Please solve the problem by moving it totally on or off the plate, and confirming that the height is within the build volume.");;
         StringObjectException warning;
         Polygons polygons;
         std::vector<std::pair<Polygon, float>> height_polygons;
@@ -10543,6 +10593,13 @@ void Plater::validate_current_plate(bool& model_fits, bool& validate_error)
             p->view3D->get_canvas3d()->set_sequential_print_clearance_render_fill(true);
             p->view3D->get_canvas3d()->set_sequential_print_clearance_polygons(polygons, height_polygons);
         }
+
+        if (!model_fits) {
+            p->notification_manager->push_plater_error_notification(plater_text);
+        }
+        else {
+            p->notification_manager->close_plater_error_notification(plater_text);
+        }
     }
 
     PartPlate* part_plate = p->partplate_list.get_curr_plate();
@@ -10596,7 +10653,7 @@ int Plater::select_plate_by_hover_id(int hover_id, bool right_click)
 
                     // BBS
                     //p->show_action_buttons(true);
-                    p->ready_to_slice = true;
+                    //p->ready_to_slice = true;
                     p->main_frame->update_slice_print_status(MainFrame::eEventPlateUpdate, true);
                 }
                 else
@@ -10604,7 +10661,7 @@ int Plater::select_plate_by_hover_id(int hover_id, bool right_click)
                     // BBS
                     //p->show_action_buttons(false);
                     //validate_current_plate(model_fits, validate_err);
-                    p->ready_to_slice = false;
+                    //p->ready_to_slice = false;
                     p->main_frame->update_slice_print_status(MainFrame::eEventPlateUpdate, false);
 
                     refresh_print();
@@ -10622,7 +10679,7 @@ int Plater::select_plate_by_hover_id(int hover_id, bool right_click)
 
                 // BBS: don't show action buttons
                 //p->show_action_buttons(true);
-                p->ready_to_slice = true;
+                //p->ready_to_slice = true;
                 if (model_fits && part_plate->has_printable_instances())
                 {
                     //p->view3D->get_canvas3d()->post_event(Event<bool>(EVT_GLCANVAS_ENABLE_ACTION_BUTTONS, true));

src/slic3r/GUI/Plater.hpp

@@ -233,7 +233,9 @@ public:
 
     // BBS
     wxString get_project_name();
-    void update_platplate_thumbnails(bool force_update = false);
+    void update_all_plate_thumbnails(bool force_update = false);
+    void invalid_all_plate_thumbnails();
+    void force_update_all_plate_thumbnails();
     //BBS static functions that update extruder params and speed table
     static void setPrintSpeedTable(Slic3r::GlobalSpeedMap& printSpeedMap);
     static void setExtruderParams(std::map<size_t, Slic3r::ExtruderParams>& extParas);