/// <summary>
/// Converts PropertyChanged to an observable sequence.
/// </summary>
public static IObservable <PropertyChangedEventArgs> PropertyChangedAsObservable <T>(this T subject)
where T : INotifyPropertyChanged =>
InternalObservable.FromEvent <PropertyChangedEventHandler, PropertyChangedEventArgs>(
h => (sender, e) => h(e),
h => subject.PropertyChanged += h,
h => subject.PropertyChanged -= h);
/// <summary>
/// Converts CanExecuteChanged to an observable sequence.
/// </summary>
public static IObservable <EventArgs> CanExecuteChangedAsObservable <T>(this T source)
where T : ICommand =>
InternalObservable.FromEvent <EventHandler, EventArgs>(
h => (sender, e) => h(e),
h => source.CanExecuteChanged += h,
h => source.CanExecuteChanged -= h);
/// <summary>
/// Converts ErrorsChanged to an observable sequence.
/// </summary>
public static IObservable <DataErrorsChangedEventArgs> ErrorsChangedAsObservable <T>(this T subject)
where T : INotifyDataErrorInfo =>
InternalObservable.FromEvent <EventHandler <DataErrorsChangedEventArgs>, DataErrorsChangedEventArgs>(
h => (sender, e) => h(e),
h => subject.ErrorsChanged += h,
h => subject.ErrorsChanged -= h);
/// <summary>
/// Converts CollectionChanged to an observable sequence.
/// </summary>
public static IObservable <NotifyCollectionChangedEventArgs> CollectionChangedAsObservable <T>(this T source)
where T : INotifyCollectionChanged =>
InternalObservable.FromEvent <NotifyCollectionChangedEventHandler, NotifyCollectionChangedEventArgs>(
h => (sender, e) => h(e),
h => source.CollectionChanged += h,
h => source.CollectionChanged -= h);
