/// <summary>
/// Creates a progress handler with common UI options: updates are sampled on <paramref name="sampleTimeSpan"/> intervals, and the <paramref name="handler"/> is executed on the UI thread. This method must be called from the UI thread. The UI should already be initialized with the default state; <paramref name="handler"/> is not invoked with an initial value.
/// </summary>
/// <param name="sampleTimeSpan">The time span interval to sample progress updates.</param>
/// <param name="handler">The progress update handler that updates the UI.</param>
/// <param name="scheduler">The scheduler to inject into the <c>Sample</c> operator.</param>
public static IDisposableProgress <T> CreateForUi(TimeSpan sampleTimeSpan, Action <T> handler, IScheduler scheduler)
{
var uiScheduler = SynchronizationContext.Current ?? new SynchronizationContext();
var progress = new ObservableProgress <T>(new Subject <T>());
var subscription = progress.Sample(sampleTimeSpan, scheduler).ObserveOn(uiScheduler).Subscribe(handler);
return(new ObservableProgressWithSubscription(progress, subscription));
}
public ObservableProgressWithSubscription(ObservableProgress <T> progress, IDisposable subscription)
{
_progress = progress;
_subscription = subscription;
}