Preformance - reinstate EditorRegions::freeze_tree_model ().

gtk2_ardour/editor.h

@@ -1586,6 +1586,9 @@ class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARD
 	void queue_visual_videotimeline_update ();
 	void embed_audio_from_video (std::string, framepos_t n = 0, bool lock_position_to_video = true);
 
+	PBD::Signal0<void> EditorFreeze;
+	PBD::Signal0<void> EditorThaw;
+
   private:
 	friend class DragManager;
 	friend class EditorRouteGroups;

gtk2_ardour/editor_ops.cc

@@ -153,6 +153,8 @@ Editor::redo (uint32_t n)
 void
 Editor::split_regions_at (framepos_t where, RegionSelection& regions)
 {
+	bool frozen = false;
+
 	RegionSelection pre_selected_regions = selection->regions;
 	bool working_on_selection = !pre_selected_regions.empty();
 
@@ -180,6 +182,8 @@ Editor::split_regions_at (framepos_t where, RegionSelection& regions)
 	} else {
 		snap_to (where);
 
+		frozen = true;
+		EditorFreeze(); /* Emit Signal */
 	}
 
 	for (RegionSelection::iterator a = regions.begin(); a != regions.end(); ) {
@@ -247,6 +251,10 @@ Editor::split_regions_at (framepos_t where, RegionSelection& regions)
 		(*c).disconnect ();
 	}
 
+	if (frozen){
+		EditorThaw(); /* Emit Signal */
+	}
+
 	if (working_on_selection) {
 		// IFF we were working on selected regions, try to reinstate the other region selections that existed before the freeze/thaw.
 

gtk2_ardour/editor_regions.cc

@@ -255,6 +255,8 @@ EditorRegions::EditorRegions (Editor* e)
 	ARDOUR::Region::RegionPropertyChanged.connect (region_property_connection, MISSING_INVALIDATOR, boost::bind (&EditorRegions::region_changed, this, _1, _2), gui_context());
 	ARDOUR::RegionFactory::CheckNewRegion.connect (check_new_region_connection, MISSING_INVALIDATOR, boost::bind (&EditorRegions::add_region, this, _1), gui_context());
 
+	e->EditorFreeze.connect (editor_freeze_connection, MISSING_INVALIDATOR, boost::bind (&EditorRegions::freeze_tree_model, this), gui_context());
+	e->EditorThaw.connect (editor_thaw_connection, MISSING_INVALIDATOR, boost::bind (&EditorRegions::thaw_tree_model, this), gui_context());
 }
 
 bool
@@ -1406,6 +1408,25 @@ EditorRegions::get_single_selection ()
 	return (*iter)[_columns.region];
 }
 
+void
+EditorRegions::freeze_tree_model (){
+
+	_display.set_model (Glib::RefPtr<Gtk::TreeStore>(0));
+	_model->set_sort_column (-2, SORT_ASCENDING); //Disable sorting to gain performance
+
+}
+
+void
+EditorRegions::thaw_tree_model (){
+
+	_model->set_sort_column (0, SORT_ASCENDING); // renabale sorting
+	_display.set_model (_model);
+
+	if (toggle_full_action()->get_active()) {
+		_display.expand_all();
+	}
+}
+
 void
 EditorRegions::locked_changed (std::string const & path)
 {

gtk2_ardour/rhythm_ferret.cc

@@ -377,6 +377,8 @@ RhythmFerret::do_split_action ()
 		return;
 	}
 
+	editor.EditorFreeze(); /* Emit signal */
+
 	editor.begin_reversible_command (_("split regions (rhythm ferret)"));
 
 	/* Merge the transient positions for regions in consideration */
@@ -407,6 +409,8 @@ RhythmFerret::do_split_action ()
 	}
 
 	editor.commit_reversible_command ();
+
+	editor.EditorThaw(); /* Emit signal */
 }
 
 void