DiagramController.java 文件源码

/**
 * Add key handler to diagram canvas.
 *  
 * @param panel
 */
protected  void addKeyHandler(DiagramCanvas panel){
    panel.addDomHandler(new KeyUpHandler() {
        @Override
        public void onKeyUp(KeyUpEvent event) {
            DiagramController.this.onKeyUp(event);
        }
    }, KeyUpEvent.getType());
}