System.err.println("click...");
    public void respondMouseClick(PInputEvent event)    {        if(sticky)        {            if(activated)            {                setActivated(false);            }            else            {                setActivated(true);            }        }        PiccoloAction action =            mouseDownActions.getMouseClickAction(PiccoloModifiers.getModifier(event));        action.execute(event);    }