问暂时禁用按键事件

EN

datepicker.addKeyPressHandler(new com.smartgwt.client.widgets.events.KeyPressHandler() {
public void onKeyPress(
    com.smartgwt.client.widgets.events.KeyPressEvent event) {
        event.preventDefault();
    }
});

         Event.addNativePreviewHandler(new NativePreviewHandler(){
                @Override
                public void onPreviewNativeEvent(NativePreviewEvent event) {
               EventTarget eventTarget = event.getNativeEvent().getEventTarget();
            Element el = Element.as(eventTarget);
                       switch (event.getTypeInt()){
                       case Event.ONKEYPRESS:
                       case Event.ONKEYUP:
                       case Event.ONKEYDOWN:
                         if (el.getNodeName().equalsIgnoreCase("NODE FROM DATEPICKER")) {
                             if (event.getNativeEvent().getKeyCode() == "yourKeyCodeToBlock"
                                    event.cancel();
                             }
                         }
                         break;
                       }                   
                }
         });