public IObservable <bool> GetActivationForView(ReactiveUI.IActivatable view)
{
BehaviorSubject <bool> activation;
if (ActivationMap.TryGetValue(view, out activation))
{
return(activation);
}
activation = new BehaviorSubject <bool>(false);
ActivationMap.Add(view, activation);
return(activation.DistinctUntilChanged());
}
private void NotifyActivationForView(ReactiveUI.IActivatable view, bool activated)
{
if (view == null)
{
throw new ArgumentNullException(nameof(view));
}
BehaviorSubject <bool> activation;
if (ActivationMap.TryGetValue(view, out activation))
{
activation.OnNext(activated);
}
else
{
activation = new BehaviorSubject <bool>(activated);
ActivationMap.Add(view, activation);
}
}
/// <summary>
/// Notifies that the given view was de-activated. This can be used so that views that utilize <see cref="ViewForMixins.WhenActivated(ISupportsActivation,Func{IEnumerable{IDisposable}})"/> will dispose registrations as expected.
/// </summary>
/// <param name="view"></param>
protected void NotifyViewDeActivated(ReactiveUI.IActivatable view) => NotifyActivationForView(view, false);
/// <summary>
/// Notifies that the given view was activated. This can be used so that views that utilize <see cref="ViewForMixins.WhenActivated(ISupportsActivation,Func{IEnumerable{IDisposable}})"/> will work as expected.
/// </summary>
/// <param name="view">The view that the activation should be notified for.</param>
protected void NotifyViewActivated(ReactiveUI.IActivatable view) => NotifyActivationForView(view, true);
