/// <summary>
/// Adds a weak event listener for a PropertyChanged event.
/// </summary>
/// <param name="source">The source of the event.</param>
/// <param name="handler">The event handler.</param>
/// <exception cref="ArgumentNullException">source must not be <c>null</c>.</exception>
/// <exception cref="ArgumentNullException">handler must not be <c>null</c>.</exception>
protected void AddWeakEventListener(INotifyPropertyChanged source, PropertyChangedEventHandler handler)
{
if (source == null) { throw new ArgumentNullException("source"); }
if (handler == null) { throw new ArgumentNullException("handler"); }
PropertyChangedEventListener listener = new PropertyChangedEventListener(source, handler);
propertyChangedListeners.Add(listener);
PropertyChangedEventManager.AddListener(source, listener, "");
}
/// <summary>
/// Adds a weak event listener for a PropertyChanged event.
/// </summary>
/// <param name="source">The source of the event.</param>
/// <param name="handler">The event handler.</param>
/// <exception cref="ArgumentNullException">source must not be <c>null</c>.</exception>
/// <exception cref="ArgumentNullException">handler must not be <c>null</c>.</exception>
protected void AddWeakEventListener(INotifyPropertyChanged source, PropertyChangedEventHandler handler)
{
if (source == null) { throw new ArgumentNullException("source"); }
if (handler == null) { throw new ArgumentNullException("handler"); }
PropertyChangedEventListener listener = new PropertyChangedEventListener(source, handler);
propertyChangedListeners.Add(listener);
PropertyChangedEventManager.AddListener(source, listener, "");
}
/// <summary>
/// Removes the weak event listener for a PropertyChanged event.
/// </summary>
/// <param name="source">The source of the event.</param>
/// <param name="handler">The event handler.</param>
/// <exception cref="ArgumentNullException">source must not be <c>null</c>.</exception>
/// <exception cref="ArgumentNullException">handler must not be <c>null</c>.</exception>
protected void RemoveWeakEventListener(INotifyPropertyChanged source, PropertyChangedEventHandler handler)
{
if (source == null) { throw new ArgumentNullException("source"); }
if (handler == null) { throw new ArgumentNullException("handler"); }
PropertyChangedEventListener listener = propertyChangedListeners.LastOrDefault(l =>
l.Source == source && l.Handler == handler);
if (listener != null)
{
propertyChangedListeners.Remove(listener);
PropertyChangedEventManager.RemoveListener(source, listener, "");
}
}
