def keystroke_output(self, settings, key, user_data):
        """If the gconf var scroll_output be changed, this method will
        be called and will set the scroll_on_output in all terminals
        open.
        """
        for i in self.guake.notebook_manager.iter_terminals():
            i.set_scroll_on_output(settings.get_boolean(key))
If the gconf var scroll_output be changed, this method will
        be called and will set the scroll_on_output in all terminals
        open.