Question

How do I convert the javascript code “window.onkeyup” (or onkeyup in body tag) to GWT?

Regards

Answer 1

For a page wide listener, you want to take a look at Event.addNativePreviewHandler. Attaching a keyup listener there should give you the effect you want. Modifing the snippet here should get you started:

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
    }
  }
});