ENH: expor core spec 3mf

Change-Id: I97ccd87f29668833881b9327b251c2ca110ecd31

src/slic3r/GUI/MainFrame.cpp

@@ -1765,6 +1765,9 @@ void MainFrame::init_menubar_as_editor()
         append_menu_item(export_menu, wxID_ANY, _L("Export all objects as STL") + dots, _L("Export all objects as STL"),
             [this](wxCommandEvent&) { if (m_plater) m_plater->export_stl(); }, "menu_export_stl", nullptr,
             [this](){return can_export_model(); }, this);
+        append_menu_item(export_menu, wxID_ANY, _L("Export Generic 3MF") + dots/* + "\tCtrl+G"*/, _L("Export 3mf file without using some 3mf-extensions"),
+            [this](wxCommandEvent&) { if (m_plater) m_plater->export_core_3mf(); }, "menu_export_sliced_file", nullptr,
+            [this](){return can_export_model(); }, this);
         // BBS export .gcode.3mf
         append_menu_item(export_menu, wxID_ANY, _L("Export Sliced File") + dots/* + "\tCtrl+G"*/, _L("Export current Sliced file"),
             [this](wxCommandEvent&) { if (m_plater) wxPostEvent(m_plater, SimpleEvent(EVT_GLTOOLBAR_EXPORT_SLICED_FILE)); }, "menu_export_sliced_file", nullptr,

src/slic3r/GUI/Plater.cpp

@@ -8057,6 +8057,14 @@ void Plater::export_gcode_3mf()
     }
 }
 
+void Plater::export_core_3mf()
+{
+    wxString path = p->get_export_file(FT_3MF);
+    if (path.empty()) { return; }
+    const std::string path_u8 = into_u8(path);
+    export_3mf(path_u8, SaveStrategy::Silence);
+}
+
 void Plater::export_stl(bool extended, bool selection_only)
 {
     if (p->model.objects.empty()) { return; }

src/slic3r/GUI/Plater.hpp

@@ -297,6 +297,7 @@ public:
 
     void export_gcode(bool prefer_removable);
     void export_gcode_3mf();
+    void export_core_3mf();
     void export_stl(bool extended = false, bool selection_only = false);
     //BBS: remove amf
     //void export_amf();