right-click to close window & exit app

Window.py

@@ -6,6 +6,8 @@ class Window(object):
         self.window = gtk.Window()
         self.window.set_decorated(False)
         self.window.connect('destroy', self.destroy_event)
+        self.window.connect('button-release-event', self.button_release)
+        self.window.set_events(gtk.gdk.BUTTON_RELEASE_MASK)
 
         self.window.show_all()
 
@@ -15,3 +17,8 @@ class Window(object):
     def destroy_event(self):
         gtk.main_quit()
         return False
+
+    def button_release(self, widget, event):
+        if event.button == 3:
+            gtk.main_quit()
+        return True