question: @ Override public void mouseDragged ( MouseEvent e ) { synchronized ( mouseLock ) { mouseX = userX ( e . getX ( ) ) ; mouseY = userY ( e . getY ( ) ) ; } for ( DrawListener listener : listeners ) listener . mouseDragged ( userX ( e . getX ( ) ) , userY ( e . getY ( ) ) ) ; }
target:  This method cannot be called directly.