/// <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="T:System.ArgumentNullException">source must not be <c>null</c>.</exception>
/// <exception cref="T:System.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 changedEventListener = propertyChangedListeners.LastOrDefault(l =>
{
if (l.Source == source)
{
return(l.Handler == handler);
}
return(false);
});
if (changedEventListener == null)
{
return;
}
propertyChangedListeners.Remove(changedEventListener);
PropertyChangedEventManager.RemoveListener(source, changedEventListener, "");
}
/// <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="T:System.ArgumentNullException">source must not be <c>null</c>.</exception>
/// <exception cref="T:System.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");
}
var changedEventListener = new PropertyChangedEventListener(source, handler);
propertyChangedListeners.Add(changedEventListener);
PropertyChangedEventManager.AddListener(source, changedEventListener, "");
}
/// <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="T:System.ArgumentNullException">source must not be <c>null</c>.</exception>
/// <exception cref="T:System.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");
}
var changedEventListener = new PropertyChangedEventListener(source, handler);
propertyChangedListeners.Add(changedEventListener);
PropertyChangedEventManager.AddListener(source, changedEventListener, "");
}
