public IDisposable Bind(
ExplorerModel model,
Chat chat)
{
return(model.WhenAnyValue(m => m.VisibleRange)
.Where(r => model.SourceItems.Count == 0) // only initial
.Where(r => !_conductor.IsBusy) // ignore if other load are already in progress
.Synchronize(_conductor.Locker)
.SelectSeq(r => StartLoading(chat))
.ObserveOn(RxApp.MainThreadScheduler)
.Accept(list => HandleLoading(model, chat, list)));
}
public IDisposable Bind(
ExplorerModel model,
Chat chat)
{
return(model.WhenAnyValue(m => m.VisibleRange)
.Throttle(TimeSpan.FromSeconds(1))
.Select(r => r.LastIndex)
.DistinctUntilChanged()
.Where(index => model.SourceItems.Count != 0) // skip initial
.Where(index => index + 4 > model.SourceItems.Count) // bottom is within 4 items
.Where(index => !_conductor.IsBusy) // ignore if other load are already in progress
.Synchronize(_conductor.Locker)
.SelectSeq(r => StartLoading(model, chat))
.ObserveOn(RxApp.MainThreadScheduler)
.Accept(list => HandleLoading(model, list)));
}