public void WeakEventTest()
{
var listener1Success = false;
var eventPublisher = new TestEventPublisher();
var listener1 = new LivetWeakEventListener <EventHandler, EventArgs>(
h => new EventHandler(h),
h => eventPublisher.EmptyEvent += h,
h => eventPublisher.EmptyEvent -= h,
(sender, e) => listener1Success = true);
var listenerWeakReference = new WeakReference(listener1);
//------------------
listener1Success.Is(false);
eventPublisher.RaiseEmptyEvent();
listener1Success.Is(true);
//------------------
listener1Success = false;
listener1 = null;
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
eventPublisher.RaiseEmptyEvent();
listener1Success.Is(false);
}
public void LifeCycleTest()
{
var listener1Success = false;
var eventPublisher = new TestEventPublisher();
var listener1 = new LivetWeakEventListener <EventHandler, EventArgs>(
h => new EventHandler(h),
h => eventPublisher.EmptyEvent += h,
h => eventPublisher.EmptyEvent -= h,
(sender, e) => listener1Success = true);
//------------------
listener1Success.Is(false);
eventPublisher.RaiseEmptyEvent();
listener1Success.Is(true);
//------------------
listener1Success = false;
listener1.Dispose();
eventPublisher.RaiseEmptyEvent();
listener1Success.Is(false);
}
public void WeakEventTest()
{
var listener1Success = false;
var eventPublisher = new TestEventPublisher();
var listener1 = new LivetWeakEventListener<EventHandler, EventArgs>(
h => new EventHandler(h),
h => eventPublisher.EmptyEvent += h,
h => eventPublisher.EmptyEvent -= h,
(sender, e) => listener1Success = true);
var listenerWeakReference = new WeakReference(listener1);
//------------------
listener1Success.Is(false);
eventPublisher.RaiseEmptyEvent();
listener1Success.Is(true);
//------------------
listener1Success = false;
listener1 = null;
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
eventPublisher.RaiseEmptyEvent();
listener1Success.Is(false);
}
public void LifeCycleTest()
{
var listener1Success = false;
var eventPublisher = new TestEventPublisher();
var listener1 = new LivetWeakEventListener<EventHandler, EventArgs>(
h => new EventHandler(h),
h => eventPublisher.EmptyEvent += h,
h => eventPublisher.EmptyEvent -= h,
(sender, e) => listener1Success = true);
//------------------
listener1Success.Is(false);
eventPublisher.RaiseEmptyEvent();
listener1Success.Is(true);
//------------------
listener1Success = false;
listener1.Dispose();
eventPublisher.RaiseEmptyEvent();
listener1Success.Is(false);
}
LivetWeakEventListener<KeyEventHandler, KeyEventArgs> _listener; //strong reference of listener
#endregion Fields
#region Constructors
public ReceiverTextBoxKeyDown(TextBox t, ICommand command)
{
_listener = new LivetWeakEventListener<KeyEventHandler, KeyEventArgs>(
h => new KeyEventHandler(h),
h => t.KeyDown += h,
h => t.KeyDown -= h,
OnKeyDownEvent);
this._command = command;
}
public MessageListener(InteractionMessenger messenger)
{
Dispatcher = Dispatcher.CurrentDispatcher;
_source = new WeakReference <InteractionMessenger>(messenger);
_listener = new LivetWeakEventListener <EventHandler <InteractionMessageRaisedEventArgs>, InteractionMessageRaisedEventArgs>
(
h => h,
h => messenger.Raised += h,
h => messenger.Raised -= h,
MessageReceived
);
}
public MessageListener([NotNull] InteractionMessenger messenger)
{
if (messenger == null)
{
throw new ArgumentNullException(nameof(messenger));
}
_dispatcher = Dispatcher.CurrentDispatcher;
_source = new WeakReference <InteractionMessenger>(messenger);
_listener =
new LivetWeakEventListener <EventHandler <InteractionMessageRaisedEventArgs>,
InteractionMessageRaisedEventArgs>
(
h => h,
h => messenger.Raised += h,
h => messenger.Raised -= h,
MessageReceived
);
}
/// <summary>
/// 渡された View を元に、DataContext(=ViewModel), Messenger を取得して、イベント購読して、メッセージキーに応じた各処理をおこないます。
/// </summary>
/// <param name="view">Window</param>
private static void AutoReceiveOperationChangedInternal(DependencyObject view)
{
if (!(view is Window))
{
return;
}
var window = view as Window;
if (_WindowCache == null)
{
_WindowCache = new Dictionary <string, LivetWeakEventListener <DependencyPropertyChangedEventHandler, DependencyPropertyChangedEventArgs> >();
}
// DataContext が null の場合処理を抜けてしまうので、抜ける前に変更監視と再開処理を残しておく
// View 単位で確保しておく
var keyName = window.GetType().FullName;
if (!_WindowCache.ContainsKey(keyName))
{
var listener = new LivetWeakEventListener <DependencyPropertyChangedEventHandler, DependencyPropertyChangedEventArgs>(
h => new DependencyPropertyChangedEventHandler(h),
h => window.DataContextChanged += h,
h => window.DataContextChanged -= h,
(s, e) => AutoReceiveOperationChangedInternal(s as DependencyObject));
_WindowCache.Add(keyName, listener);
}
if (window.DataContext == null)
{
return;
}
var dataContext = window.DataContext;
if (!(dataContext is ViewModel))
{
return;
}
var vm = dataContext as ViewModel;
var messenger = vm.Messenger;
if (_MessengerCache == null)
{
_MessengerCache = new Dictionary <string, LivetWeakEventListener <EventHandler <InteractionMessageRaisedEventArgs>, InteractionMessageRaisedEventArgs> >();
}
// ViewModel 単位で確保しておく
keyName = $"{vm.GetType().FullName}.{messenger.GetType().Name}";
if (!_MessengerCache.ContainsKey(keyName))
{
var listener = new LivetWeakEventListener <EventHandler <InteractionMessageRaisedEventArgs>, InteractionMessageRaisedEventArgs>(
h => new EventHandler <InteractionMessageRaisedEventArgs>(h),
h => messenger.Raised += h,
h => messenger.Raised -= h,
(s, e) => Messenger_Raised(window, s, e));
_MessengerCache.Add(keyName, listener);
}
}
