|
private GetNode ( |
||
| element | ||
| 리턴 | ||
private static void OnSourceErrorsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var node = Scope.GetNode(d) as InputNode;
if (node == null)
{
// this happens when disposing
return;
}
var oldErrors = (ReadOnlyObservableCollection <ValidationError>)e.OldValue;
if (ShouldTrack(oldErrors))
{
CollectionChangedEventManager.RemoveHandler(oldErrors, node.OnSourceErrorsChanged);
}
var newErrors = (ReadOnlyObservableCollection <ValidationError>)e.NewValue;
node.ErrorCollection.Remove(oldErrors);
node.ErrorCollection.Add(newErrors);
if (ShouldTrack(newErrors))
{
CollectionChangedEventManager.AddHandler(newErrors, node.OnSourceErrorsChanged);
}
}
private static void OnSourceErrorsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (Scope.GetNode(d) is InputNode node)
{
if (e.OldValue is ReadOnlyObservableCollection <ValidationError> oldErrors &&
!ReferenceEquals(oldErrors, ErrorCollection.EmptyValidationErrors))
{
CollectionChangedEventManager.RemoveHandler(oldErrors, node.OnSourceErrorsChanged);
node.ErrorCollection.Remove(oldErrors);
}
if (e.NewValue is ReadOnlyObservableCollection <ValidationError> newErrors &&
!ReferenceEquals(newErrors, ErrorCollection.EmptyValidationErrors))
{
CollectionChangedEventManager.AddHandler(newErrors, node.OnSourceErrorsChanged);
node.ErrorCollection.Add(newErrors);
}
}
}