/// <summary>
/// コンストラクタ。リスナのインスタンスの作成と同時にハンドラを一つ登録します。
/// </summary>
/// <param name="source">INotifyPropertyChangedオブジェクト</param>
/// <param name="handler">PropertyChangedイベントハンドラ</param>
public PropertyChangedWeakEventListener(INotifyPropertyChanged source, PropertyChangedEventHandler handler)
{
_bag = new AnonymousPropertyChangedEventHandlerBag(source, handler);
Initialize(
h => new PropertyChangedEventHandler(h),
h => source.PropertyChanged += h,
h => source.PropertyChanged -= h,
(sender, e) => _bag.ExecuteHandler(e));
}
/// <summary>
/// コンストラクタ
/// </summary>
/// <param name="source">INotifyPropertyChangedオブジェクト</param>
public PropertyChangedWeakEventListener([NotNull] INotifyPropertyChanged source)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
_bag = new AnonymousPropertyChangedEventHandlerBag(source);
Initialize(
h => new PropertyChangedEventHandler(h ?? throw new ArgumentNullException(nameof(h))),
h => source.PropertyChanged += h,
h => source.PropertyChanged -= h,
(sender, e) => _bag.ExecuteHandler(e ?? throw new ArgumentNullException(nameof(e))));
}
