private static void OnBehaviorsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
BehaviorCollection oldBehaviors = (BehaviorCollection)e.OldValue;
if (oldBehaviors != null && ((IAttachedObject)oldBehaviors).AssociatedObject == d)
{
oldBehaviors.Detach();
}
BehaviorCollection newBehaviors = (BehaviorCollection)e.NewValue;
if (newBehaviors != null)
{
FrameworkElement element = FrameworkElement.FindTreeElement(newBehaviors);
if (element != null && !element.IsInitialized)
{
// assigned from a template, collection must be cloned
d.SetValue(BehaviorsProperty, newBehaviors.Clone());
}
else
{
newBehaviors.Attach(d);
}
}
}
/// <summary>
/// Gets the value of the Behaviors attached property
/// </summary>
public static BehaviorCollection GetBehaviors(DependencyObject d)
{
if (d == null)
{
throw new ArgumentNullException("d");
}
BehaviorCollection behaviors = (BehaviorCollection)d.GetValue(BehaviorsProperty);
if (behaviors == null)
{
behaviors = new BehaviorCollection();
d.SetValue(BehaviorsProperty, behaviors);
}
return(behaviors);
}
