public BehaviorCollectionEx(DependencyObject parent)
{
this.parent = new WeakReference <DependencyObject>(parent);
if (parent is FrameworkElement frameworkElement)
{
this.weakLoadedEvent = new LoadedWeakEventListener(frameworkElement, this);
this.weakUnloadedEvent = new UnloadedWeakEventListener(frameworkElement, this);
}
}
internal void SetParent(DependencyObject target)
{
this.DetachAll();
if (this.parent == null)
{
this.parent = new WeakReference <DependencyObject>(target);
}
else
{
this.parent.SetTarget(target);
}
foreach (var behavior in this)
{
behavior.Attach(target);
}
if (target is FrameworkElement frameworkElement)
{
this.weakLoadedEvent = new LoadedWeakEventListener(frameworkElement, this);
this.weakUnloadedEvent = new UnloadedWeakEventListener(frameworkElement, this);
}
}