internal static WeakDataContextChangedListener CreateIfNecessary(object source, IDataContextChangedListener listener)
{
if (!(source is UIElement))
{
return null;
}
return new WeakDataContextChangedListener(source as UIElement, listener);
}
private WeakDataContextChangedListener(UIElement source, IDataContextChangedListener listener)
{
this.mentor = source;
this.mentor.DataContextChanged += new DataContextChangedEventHandler(this.MentorDataContextChanged);
this.weakListener = new WeakReference(listener);
}
internal WeakDataContextChangedListener(UIElement mentor, IDataContextChangedListener listener)
{
this.mentor = mentor;
this.mentor.DataContextChanged += this.MentorDataContextChanged;
this.weakListener = new WeakReference <IDataContextChangedListener>(listener);
}
