void MakeAdorner(UIElement uiElement, object data, object target, bool isOpening, bool canDrop, string message)
{
// get adorner layer
FrameworkElement el = this.AssociatedObject;
while (el != null && (!(el is UserControl) || AdornerLayer.GetAdornerLayer(el) == null))
{
el = (FrameworkElement)VisualTreeHelper.GetParent(el);
}
if (el != null)
{
_adornerLayer = AdornerLayer.GetAdornerLayer(el);
// make adorner
if (AdornerType == null)
{
_adorner = new DropAdorner(uiElement, data, target, isOpening, canDrop, message);
}
else
{
_adorner = (System.Windows.Documents.Adorner)Activator.CreateInstance(AdornerType, new object[] { uiElement, data, target, isOpening, canDrop, message });
}
_adornerLayer.Add(this._adorner);
// set adorner z-order
var setZOrderMethodInfo = _adornerLayer.GetType().GetMethod("SetAdornerZOrder", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
setZOrderMethodInfo.Invoke(_adornerLayer, new object[] { _adorner, 1 });
}
}
/// <summary>
/// Update adorner’s order.
/// </summary>
private void UpdateOrder()
{
if (_adornerLayer == null || _adorner == null)
{
return;
}
try {
_adornerLayer.GetType().GetMethod("SetAdornerZOrder", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance)
.Invoke(_adornerLayer, new object[] { _adorner, Order });
} catch {
// ignored
}
}