os x: an initial attempt at fixing loss of keyboard focus after cmd-w to close dialog

gtk2_ardour/ardour_ui.cc

@@ -391,6 +391,8 @@ ARDOUR_UI::ARDOUR_UI (int *argcp, char **argvp[], const char* localedir)
 		keyboard->set_state (*node, Stateful::loading_state_version);
 	}
 
+	keyboard->GrabFocus.connect (sigc::mem_fun (*this, &ARDOUR_UI::grab_focus_after_dialog));
+
 	/* we don't like certain modifiers */
 	Bindings::set_ignored_state (GDK_LOCK_MASK|GDK_MOD2_MASK|GDK_MOD3_MASK);
 
@@ -5068,3 +5070,13 @@ ARDOUR_UI::cancel_solo ()
 		_session->clear_all_solo_state (_session->get_routes()); // safeguard, ideally this won't do anything, check the log-window
 	}
 }
+
+void
+ARDOUR_UI::grab_focus_after_dialog ()
+{
+	if (mixer && mixer->fully_visible()) {
+		mixer->grab_focus ();
+	} else if (editor) {
+		editor->grab_focus ();
+	}
+}

gtk2_ardour/ardour_ui.h

@@ -795,6 +795,8 @@ class ARDOUR_UI : public Gtkmm2ext::UI, public ARDOUR::SessionHandlePtr
 	void audioengine_became_silent ();
 
 	DuplicateRouteDialog* duplicate_routes_dialog;
+
+	void grab_focus_after_dialog ();
 };
 
 #endif /* __ardour_gui_h__ */

libs/gtkmm2ext/gtkmm2ext/keyboard.h

@@ -179,6 +179,7 @@ class LIBGTKMM2EXT_API Keyboard : public sigc::trackable, PBD::Stateful
 	};
 
 	sigc::signal0<void> ZoomVerticalModifierReleased;
+	sigc::signal0<void> GrabFocus;
 
   protected:
 	static Keyboard* _the_keyboard;

libs/gtkmm2ext/keyboard.cc

@@ -432,6 +432,14 @@ Keyboard::close_current_dialog ()
 	if (current_window) {
 		current_window->hide ();
 		current_window = 0;
+#ifdef __APPLE__
+		/* Since Apple users has a basically unconfigurable window
+		   manager, and since users there cannot use
+		   focus-follows-mouse, we force focus back to some application
+		   "main window" after closing a dialog via Primary-w.
+		*/
+		GrabFocus ();
+#endif
 	}
 }