EventsExecutor.java 文件源码

public void setKeyPressed(JavaScriptObject aValue) {
    if (keyPressed != aValue) {
        if (keyDownReg != null) {
            keyDownReg.removeHandler();
            keyDownReg = null;
        }
        keyPressed = aValue;
        if (keyPressed != null && component instanceof HasKeyDownHandlers) {
            keyDownReg = ((HasKeyDownHandlers) component).addKeyDownHandler(new KeyDownHandler() {
                @Override
                public void onKeyDown(KeyDownEvent event) {
                    if (keyPressed != null) {
                        event.stopPropagation();
                        executeEvent(keyPressed, EventsPublisher.publish(event));
                    }
                }
            });
        }
    }
}