public static IObservable <T> Busy <T>(this IObservable <T> observable, ReactiveViewModelBase viewModel, IScheduler scheduler)
{
var stream = Observable.Create <T>(obs =>
{
viewModel.ObservingCount++;
var disposables = new CompositeDisposable
{
observable
.SubscribeOn(scheduler)
.ObserveOn(viewModel.UiDispatcherScheduler)
.Subscribe(e => obs.OnNext(e), ex => obs.OnError(ex), () => obs.OnCompleted()),
Disposable.Create(() =>
{
viewModel.ObservingCount--;
})
};
return(disposables);
});
return(stream.SubscribeOn(viewModel.UiDispatcherScheduler));
}
public static IObservable <T> Busy <T>(this IObservable <T> observable, ReactiveViewModelBase viewModel) => Busy(observable, viewModel, NewThreadScheduler.Default);
