/// <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>
/// <returns>The disposable observable progress handler.</returns>
public static IDisposableProgress <T> CreateForUi(TimeSpan sampleTimeSpan, Action <T> handler)
{
var uiScheduler = SynchronizationContext.Current ?? new SynchronizationContext();
var progress = new ObservableProgress <T>(new Subject <T>());
var subscription = progress.Sample(sampleTimeSpan).ObserveOn(uiScheduler).Subscribe(handler);
return(new ObservableProgressWithSubscription(progress, subscription));
}
public ObservableProgressWithSubscription(ObservableProgress <T> progress, IDisposable subscription)
{
this.progress = progress;
this.subscription = subscription;
}