private static void OnErrorsProxyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var node = (ErrorNode)d.GetValue(Scope.ErrorsProperty);
if (node == null)
{
// this happens when disposing
return;
}
var oldValue = (ReadOnlyObservableCollection <ValidationError>)e.OldValue;
if (oldValue != null)
{
CollectionChangedEventManager.RemoveListener(oldValue, node);
}
var newValue = (ReadOnlyObservableCollection <ValidationError>)e.NewValue;
if (newValue != null)
{
CollectionChangedEventManager.AddListener(newValue, node);
}
node.RefreshErrors();
BubbleRoute.Notify(node);
}
bool IWeakEventListener.ReceiveWeakEvent(Type managerType, object sender, EventArgs e)
{
if (managerType == typeof(CollectionChangedEventManager))
{
this.RefreshErrors();
BubbleRoute.Notify(this);
return(true);
}
return(false);
}
protected override void Dispose(bool disposing)
{
if (!disposing)
{
return;
}
var source = this.Source;
if (source != null)
{
var value = source.GetValue(ErrorsProxyProperty);
if (value != null)
{
CollectionChangedEventManager.RemoveListener((INotifyCollectionChanged)value, this);
}
BindingOperations.ClearBinding(source, ErrorsProxyProperty);
this.RefreshErrors();
BubbleRoute.Notify(this);
}
}
