private static void PointsPropertyChangedCallback(DependencyObject sender, DependencyPropertyChangedEventArgs args)
{
DDNodeObject realSender = sender as DDNodeObject;
if (realSender == null)
{
return;
}
// Setup callbacks for adding and removing nodes.
// FreezableCollection could have done this automatically, but then we wouldn't have had
// advanced features of INotifyCollectionChanged (eg. lists of affected nodes).
if (args.OldValue != null)
{
((DDNodeCollection)args.OldValue).CollectionChanged -= realSender.Nodes_CollectionChanged;
}
if (args.NewValue != null)
{
((DDNodeCollection)args.NewValue).CollectionChanged += realSender.Nodes_CollectionChanged;
}
realSender.SetupGeometry();
}
public DDNodeObjectTC(DDNodeObject target)
: base(target)
{
}