protected void AddWeakEventListener(INotifyPropertyChanged source, PropertyChangedEventHandler handler)
{
if (source == null)
{
throw new ArgumentException("source");
}
if (handler == null)
{
throw new ArgumentException("handler");
}
PropertyChangedEventListener listener = new PropertyChangedEventListener(source, handler);
propertyEventListeners.Add(listener);
PropertyChangedEventManager.AddListener(source, listener, "");
}
protected void RemoveWeakEventListener(INotifyPropertyChanged source, PropertyChangedEventHandler handler)
{
if (source == null)
{
throw new ArgumentException("source");
}
if (handler == null)
{
throw new ArgumentException("handler");
}
PropertyChangedEventListener listener = propertyEventListeners.LastOrDefault(c => c.Source == source && c.Handler == handler);
if (listener != null)
{
propertyEventListeners.Remove(listener);
PropertyChangedEventManager.RemoveListener(source, listener, "");
}
}
