void CreateAdorner(OrderType orderType, int order)
{
sortAdorner = new SortAdorner(this, orderType, order) { IsHitTestVisible = false };
if (this.IsVisible)
CreateAdorner(null, new DependencyPropertyChangedEventArgs());
else
this.IsVisibleChanged += CreateAdorner;
}
void CleanAdorner()
{
var layer = AdornerLayer.GetAdornerLayer(this);
if (layer != null)
layer.Remove(sortAdorner);
sortAdorner = null;
}
