If the gconf var window_ontop be changed, this method will
        be called and will set the keep_above attribute in guake's
        main window.

def ontop_toggled(self, settings, key, user_data):
        """If the gconf var window_ontop be changed, this method will
        be called and will set the keep_above attribute in guake's
        main window.
        """
        self.guake.window.set_keep_above(settings.get_boolean(key))