GWT中的window.onkeyup

Question

如何将javascript代码"window.onkeyup"(或body标签中的onkeyup)转换为GWT？

问候

Answer 1

对于页面范围的侦听器,您需要查看Event.addNativePreviewHandler.在那里附加一个keyup监听器应该会给你想要的效果.修改这里的代码片段应该让你开始:

Event.addNativePreviewHandler(new NativePreviewHandler() {
  public void onPreviewNativeEvent(final NativePreviewEvent event) {
    final int eventType = event.getTypeInt();
    switch (eventType) {
      case Event.ONKEYUP:
        //magic here
        break;
      default:
        // not interested in other events
    }
  }
});