Re: How to detect the scrollpanel is still scrolling or not in GWT?

Is there any way to implement scroll bar with mouse listeners? Bottom line, I want to send the request while doing scrolling. I meant last scrolling height to server if scrolling is delayed for 100 ms or stopped.

On Friday, 22 July 2016 12:12:57 UTC+5:30, DavidN wrote:

maybe you could listen to mousedown/up in combination with scrollevents ?

On Fri, 22 Jul 2016 at 08:27, shiva raaj <stsi...@gmail.com> wrote:

Thanks for response. But I need consider last request only. Basically I need to skip(eaten) all the previous request. I have logic to eat the request.But Is there any way to find out scroll bar is still scrolling without release the bar.

Thank U

On Thursday, 21 July 2016 18:18:25 UTC+5:30, Gilberto wrote:

I don't know if that helps with your problem, but you could leave the events as they are today and only make new requests to the server when the previous one were executed.

Something like this:

private boolean requestingServer = false;

public void onScroll(ScrollEvent scrollEvent) {
    if (requestingServer) return;
    requestingServer = true;
    doServerRequest(new Callback(){ //pseudo code here for a callback mechanism
        public void onResponse(Payload something){
            requestingServer = false;
        }
    });
}

You can add a logic for a minimum delay between requests as well.

This kind of code works on GWT because it is single threaded. In pure Java you would need to create synchronized blocks to ensure that only one request is being made to the server.

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