Update gizmos on/off state

src/slic3r/GUI/GLCanvas3D.cpp

@@ -5248,6 +5248,12 @@ void GLCanvas3D::set_camera_zoom(float zoom)
     _refresh_if_shown_on_screen();
 }
 
+void GLCanvas3D::update_gizmos_on_off_state()
+{
+    set_as_dirty();
+    m_gizmos.update_on_off_state(get_selection());
+}
+
 bool GLCanvas3D::_is_shown_on_screen() const
 {
     return (m_canvas != nullptr) ? m_canvas->IsShownOnScreen() : false;

src/slic3r/GUI/GLCanvas3D.hpp

@@ -919,6 +919,8 @@ public:
 
     void set_camera_zoom(float zoom);
 
+    void update_gizmos_on_off_state();
+
 private:
     bool _is_shown_on_screen() const;
     void _force_zoom_to_bed();

src/slic3r/GUI/GUI_ObjectList.cpp

@@ -1405,7 +1405,7 @@ void ObjectList::update_selections_on_canvas()
     const int sel_cnt = GetSelectedItemsCount();
     if (sel_cnt == 0) {
         selection.clear();
-        wxGetApp().plater()->canvas3D()->set_as_dirty();
+        wxGetApp().plater()->canvas3D()->update_gizmos_on_off_state();
         return;
     }
 
@@ -1435,7 +1435,7 @@ void ObjectList::update_selections_on_canvas()
         else
             add_to_selection(item, selection, true);
             
-        wxGetApp().plater()->canvas3D()->set_as_dirty();
+        wxGetApp().plater()->canvas3D()->update_gizmos_on_off_state();
         return;
     }
     
@@ -1446,7 +1446,7 @@ void ObjectList::update_selections_on_canvas()
     for (auto item: sels)
         add_to_selection(item, selection, false);
 
-    wxGetApp().plater()->canvas3D()->set_as_dirty();
+    wxGetApp().plater()->canvas3D()->update_gizmos_on_off_state();
 }
 
 void ObjectList::select_item(const wxDataViewItem& item)

src/slic3r/GUI/Plater.cpp

@@ -1563,6 +1563,7 @@ void Plater::priv::object_list_changed()
 void Plater::priv::select_all()
 {
     this->canvas3D->select_all();
+    this->sidebar->obj_list()->update_selections();
 }
 
 void Plater::priv::remove(size_t obj_idx)