gwt popuppanel cancel onclose process based on a condition

Question

I have a PopupPanel

 private PopupPanel simplePopup;

The popup opens in the app. When the user clicks outside of it the popup is closed. This is the default behaviour. I'd like to override that behaviour and DON'T close the popup IF a condition is met. I have something like this in mind:

  simplePopup.addCloseHandler(new CloseHandler<PopupPanel>() {

        @Override
        public void onClose(CloseEvent<PopupPanel> arg0) {
            if (conditionIsMet) {
              // do something here to avoid closing the popup
           }
        }
    });

But I don't know how to prevent the popup from closing. I've read something about onPreviewNativeEvent but I don't know how to use it.

Answer 1

You need to disable the autoHide flag. The default hide behavior is due to this flag. You can disable it with the following code snippet.

simplePopup.setAutoHideEnabled( false );

You can also disable it through constructor.

You can control the hide based on some condition by overridding the hide method as

    simplepopup = new PopupPanel( false)
    {
        @Override
        public void hide( boolean autoClosed )
        {
            if( condition met )
            {
                super.hide();
            } 
        }
    };