get scroll event from iframe

there seems to be no way in GWT to get the iframe scrollEvent.

I tried

(com.google.gwt.dom.client.IFrameElement)frame.addDomHandler(new ScrollHandler() {

@Override

public void onScroll(ScrollEvent event) {

  // do something

}

}, ScrollEvent.getType());

but the event does not fire when scrolling

inside the iframe, you can get

Document document = iframe.getContentDocument(); 

but it does not have methods for adding listeners. there is no method for returning the contentWindow like in javascript.

any one knows any way to get the iframe scroll event?

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