private static void UpdateAdornerLayer(FrameworkElement element, bool elevate, bool loaded = false)
{
var adornerLayer = AdornerLayer.GetAdornerLayer(element);
if (adornerLayer == null)
{
if (!loaded)
{
element.Dispatcher.InvokeAsync(() => UpdateAdornerLayer(element, elevate, true), DispatcherPriority.Loaded);
}
return;
}
var info = GetFrameworkElementAdornerInfo(element);
if (elevate)
{
if (info == null)
{
var parent = VisualTreeHelper.GetParent(element) as Panel;
if (parent == null)
{
return;
}
var index = parent.Children.IndexOf(element);
parent.Children.RemoveAt(index);
parent.Children.Insert(index, new Control());
var frameworkElementAdorner = new FrameworkElementAdorner(element);
frameworkElementAdorner.Child = element;
info = new FrameworkElementAdornerInfo
{
Parent = parent,
Index = index,
Adorner = frameworkElementAdorner
};
adornerLayer.Add(frameworkElementAdorner);
SetFrameworkElementAdornerInfo(element, info);
}
}
else
{
if (info != null)
{
info.Adorner.Child = null;
SetFrameworkElementAdornerInfo(element, null);
adornerLayer.Remove(info.Adorner);
info.Parent.Children.RemoveAt(info.Index);
info.Parent.Children.Insert(info.Index, element);
}
}
}
public static void SetFrameworkElementAdornerInfo(DependencyObject obj, FrameworkElementAdornerInfo value)
{
obj.SetValue(FrameworkElementAdornerInfoProperty, value);
}
