Render on Demand ,Listbox doesn't work after a defined list size

asked 2014-10-13 08:07:27 +0800

nsharma
917 ● 1 ● 11

updated 2014-10-14 13:12:31 +0800

Hi ,

I have been trying to implement Render on demand functionality on listbox. I added this listner to my class :

public class LazyListbox extends Listbox {
.
.
public void initialize() {
    addEventListener("onDataLoading", new EventListener() {

                public void onEvent(Event event) throws Exception {
                    DataLoadingEvent dataLoadingEvent = (DataLoadingEvent) event;
                    int offset = dataLoadingEvent.getOffset();
                    int limit = dataLoadingEvent.getLimit();


                    ListModel origModel = LazyListbox.this.getModel();

                    if (origModel instanceof RenderOnDemandListModel<?>) {
                        RenderOnDemandListModel<?> model = (RenderOnDemandListModel<?>) origModel ;
                        model.loadCache(offset + 1, offset + limit);
                    }
                }
            });
}
.
.
.
}

Every thing is working fine. and I was able to successfully implement this functionality.

Now the only problem I face is that after a certain list size(around 11,18,480) ,this event stops getting called. So when I Scroll down nothing happens. I think the Component(listbox in this case) is not able to send the AUrequest to server. I still don't know the reason why. If somebody is able to identify and have a solution for this please reply.

Thanks in advance.