gwt grid scroll syn

Question

I'm using gwt; and I have two grids in my page. They have the same count of rows with diff contents.

I want that, when I scroll grid1,grid2 auto scroll to the same place.

Can anyone help?

I tried like this, but this event doesn't fire.

grid1.addBodyScrollHandler(new BodyScrollHandler()
    {
        @Override
        public void onBodyScroll(BodyScrollEvent event)
        {
            Info.display("test", event.getScrollTop() + "");
            //if this event fires,how to scroll grid2
        }
    });

Answer 1

From https://stackoverflow.com/a/15048539/860630, which goes into a little more depth on other parts of this general issue:

  grid1.addBodyScrollHandler(new BodyScrollHandler() {
    @Override
    public void onBodyScroll(BodyScrollEvent event) {
      grid2.getView().getScroller().scrollTo(ScrollDirection.TOP, event.getScrollTop());
    }
  });
  grid2.addBodyScrollHandler(new BodyScrollHandler() {
    @Override
    public void onBodyScroll(BodyScrollEvent event) {
      grid1.getView().getScroller().scrollTo(ScrollDirection.TOP, event.getScrollTop());
    }
  });