FIX: Open provided file at startup (#11419)

src/slic3r/GUI/GUI_App.cpp

@@ -821,13 +821,14 @@ void GUI_App::post_init()
 
         BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << boost::format(", init with input files, size %1%, input_gcode %2%")
             %this->init_params->input_files.size() %this->init_params->input_gcode;
+
+        switch_to_3d = true;
+
         const auto first_url = this->init_params->input_files.front();
         if (this->init_params->input_files.size() == 1 && is_supported_open_protocol(first_url)) {
-            switch_to_3d = true;
             start_download(first_url);
             m_open_method = "url";
         } else {
-            switch_to_3d = true;
             if (this->init_params->input_gcode) {
                 mainframe->select_tab(size_t(MainFrame::tp3DEditor));
                 plater_->select_view_3D("3D");
@@ -904,6 +905,7 @@ void GUI_App::post_init()
         mainframe->Thaw();
         BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ", end load_gl_resources";
     }
+
     plater_->trigger_restore_project(1);
     //#endif
 

src/slic3r/GUI/Plater.cpp

@@ -5105,14 +5105,19 @@ Plater::priv::priv(Plater *q, MainFrame *main_frame)
                     return;
                 }
             }
+
             try {
                 if (originfile != "<lock>") // see bbs_3mf.cpp for lock detail
                     boost::filesystem::remove_all(last);
             }
+
             catch (...) {}
-            int skip_confirm = e.GetInt();
-            this->q->new_project(skip_confirm, true);
-            });
+            
+            if (this->q->get_project_filename().IsEmpty() && this->q->is_empty_project()) {
+                int skip_confirm = e.GetInt();
+                this->q->new_project(skip_confirm, true);
+            }
+        });
         //wxPostEvent(this->q, wxCommandEvent{EVT_RESTORE_PROJECT});
     }
 
@@ -15078,6 +15083,9 @@ void Plater::export_toolpaths_to_obj() const
     p->preview->get_canvas3d()->export_toolpaths_to_obj(into_u8(path).c_str());
 }
 
+bool Plater::is_empty_project() {
+    return model().objects.empty();
+}
 bool Plater::is_multi_extruder_ams_empty()
 {
     std::vector<std::string>        extruder_ams_count_str = p->config->option<ConfigOptionStrings>("extruder_ams_count", true)->values;

src/slic3r/GUI/Plater.hpp

@@ -350,6 +350,7 @@ public:
         m_exported_file = exported_file;
     }
 
+    bool is_empty_project();
     bool is_multi_extruder_ams_empty();
     // BBS
     bool is_new_project_and_check_state() { return m_new_project_and_check_state; }