use Tracks' MainMenuDisabler during session lock (could be improved with more RAII)

gtk2_ardour/editor.cc

@@ -302,6 +302,7 @@ Editor::Editor ()
 	, _control_point_toggled_on_press (false)
 	, _stepping_axis_view (0)
 	, quantize_dialog (0)
+	, _main_menu_disabler (0)
 {
 	constructed = false;
 

gtk2_ardour/editor.h

@@ -2239,6 +2239,7 @@ class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARD
 	void bring_all_sources_into_session ();
 
 	QuantizeDialog* quantize_dialog;
+	MainMenuDisabler* _main_menu_disabler;
 	
 	friend class Drag;
 	friend class RegionDrag;

gtk2_ardour/editor_ops.cc

@@ -7547,15 +7547,10 @@ Editor::lock ()
 		lock_dialog->get_vbox()->show_all ();
 		lock_dialog->set_size_request (200, 200);
 	}
+
+	delete _main_menu_disabler;
+	_main_menu_disabler = new MainMenuDisabler;
 	
-#ifdef __APPLE__
-	/* The global menu bar continues to be accessible to applications
-	   with modal dialogs, which means that we need to desensitize
-	   all items in the menu bar. Since those items are really just
-	   proxies for actions, that means disabling all actions.
-	*/
-	ActionManager::disable_all_actions ();
-#endif
 	lock_dialog->present ();
 }
 
@@ -7564,9 +7559,7 @@ Editor::unlock ()
 {
 	lock_dialog->hide ();
 	
-#ifdef __APPLE__
-	ActionManager::pop_action_state ();
-#endif	
+	delete _main_menu_disabler;
 
 	if (ARDOUR_UI::config()->get_lock_gui_after_seconds()) {
 		start_lock_event_timing ();

gtk2_ardour/public_editor.h

@@ -40,6 +40,8 @@
 #include "pbd/statefuldestructible.h"
 
 #include "canvas/fwd.h"
+
+#include "gtkmm2ext/actions.h"
 #include "gtkmm2ext/visibility_tracker.h"
 
 #include "editing.h"
@@ -459,4 +461,19 @@ class DisplaySuspender {
 		}
 };
 
+class MainMenuDisabler {
+public:
+	MainMenuDisabler () {
+		/* The global menu bar continues to be accessible to applications
+		   with modal dialogs on mac, which means that we need to desensitize
+		   all items in the menu bar. 
+		*/
+		ActionManager::disable_active_actions ();
+	}
+	
+	~MainMenuDisabler () {
+		ActionManager::enable_active_actions ();
+	}
+};
+
 #endif // __gtk_ardour_public_editor_h__