JHotDrawInteractiveDisplay2D.java 文件源码

/**
    * Remove an event handler.
    * Add new event handler. Depending on the interfaces implemented by
    * <code>handler</code> calls {@link Component#removeKeyListener(KeyListener)},
    * {@link Component#removeMouseListener(MouseListener)},
    * {@link Component#removeMouseMotionListener(MouseMotionListener)},
    * {@link Component#removeMouseWheelListener(MouseWheelListener)}.
    */
   @Override
public void removeHandler( final Object handler )
   {
       if ( KeyListener.class.isInstance( handler ) )
           removeKeyListener( ( KeyListener ) handler );

       if ( MouseMotionListener.class.isInstance( handler ) )
           removeMouseMotionListener( ( MouseMotionListener ) handler );

       if ( MouseListener.class.isInstance( handler ) )
           removeMouseListener( ( MouseListener ) handler );

       if ( MouseWheelListener.class.isInstance( handler ) )
           removeMouseWheelListener( ( MouseWheelListener ) handler );
   }