/// <summary>
/// Update the Adorners for the given element
/// </summary>
/// <param name="element">UIElement for which we're updating AdornerSet</param>
private void UpdateElementAdorners(UIElement element)
{
Size size;
// we intentionally do not ascend in to a 3D scene
Visual adornerLayerParent = VisualTreeHelper.GetParent(this) as Visual;
if (adornerLayerParent == null)
{
return;
}
Debug.Assert(element != null);
ArrayList adornerInfos = ElementMap[element] as ArrayList;
if (adornerInfos == null)
{
return;
}
bool dirty = false;
//
// See if the adorners need to be rerendered due to object resizing
//
GeneralTransform transform = element.TransformToAncestor(adornerLayerParent);
for (int i = 0; i < adornerInfos.Count; i++)
{
AdornerInfo adornerInfo = (AdornerInfo)adornerInfos[i];
size = element.RenderSize;
Geometry clip = null;
bool clipChanged = false;
if (adornerInfo.Adorner.IsClipEnabled)
{
clip = GetClipGeometry(adornerInfo.Adorner.AdornedElement, adornerInfo.Adorner);
if (adornerInfo.Clip == null && clip != null || adornerInfo.Clip != null && clip == null ||
(adornerInfo.Clip != null && clip != null && adornerInfo.Clip.Bounds != clip.Bounds))
{
clipChanged = true;
}
}
if (adornerInfo.Adorner.NeedsUpdate(adornerInfo.RenderSize) || adornerInfo.Transform == null ||
transform.AffineTransform == null || adornerInfo.Transform.AffineTransform == null ||
transform.AffineTransform.Value != adornerInfo.Transform.AffineTransform.Value ||
clipChanged)
{
InvalidateAdorner(adornerInfo);
adornerInfo.RenderSize = size;
adornerInfo.Transform = transform;
if (adornerInfo.Adorner.IsClipEnabled)
{
adornerInfo.Clip = clip;
}
dirty = true;
}
}
if (dirty)
InvalidateMeasure();
}