/// <summary>
/// Constructor.
/// </summary>
/// <param name="element">The element whose Parent property should be listened to.</param>
/// <param name="onParentChanged">The action that will be performed upon change events.</param>
public ParentChangedNotifier(FrameworkElement element, Action onParentChanged)
{
this.element = new WeakReference(element);
if (onParentChanged != null)
{
if (!OnParentChangedList.ContainsKey(this.element))
{
var foundOne = false;
foreach (var key in OnParentChangedList.Keys)
{
if (ReferenceEquals(key.Target, element))
{
this.element = key;
foundOne = true;
break;
}
}
if (!foundOne)
{
OnParentChangedList.Add(this.element, new List <Action>());
}
}
OnParentChangedList[this.element].Add(onParentChanged);
}
if (element.CheckAccess())
{
SetBinding();
}
else
{
element.Dispatcher.Invoke(new Action(SetBinding));
}
}
