private static void OnBehaviorsChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args)
{
BehaviorCollection oldCollection = (BehaviorCollection)args.OldValue;
BehaviorCollection newCollection = (BehaviorCollection)args.NewValue;
if (oldCollection == newCollection)
{
return;
}
if (oldCollection != null && oldCollection.AssociatedObject != null)
{
oldCollection.Detach();
}
if (newCollection != null && sender != null)
{
newCollection.Attach(sender);
}
}
public void Detach_Attached_AllItemsDetached()
{
BehaviorCollection behaviorCollection = new BehaviorCollection();
behaviorCollection.Add(new StubBehavior());
behaviorCollection.Add(new StubBehavior());
behaviorCollection.Add(new StubBehavior());
behaviorCollection.Attach(new Button());
behaviorCollection.Detach();
Assert.IsNull(behaviorCollection.AssociatedObject, "The AssociatedObject should be null after Detach.");
foreach (StubBehavior behavior in behaviorCollection)
{
TestUtilities.AssertDetached(behavior);
}
}
public void Detach_NotAttached_DetachNotCalledOnItems()
{
BehaviorCollection behaviorCollection = new BehaviorCollection() { new StubBehavior() };
behaviorCollection.Detach();
TestUtilities.AssertNotDetached((StubBehavior)behaviorCollection[0]);
}
