/// <summary>
/// Adds an adorner to the adorner layer.
/// </summary>
/// <param name="adorner">The adorner to add to the adorner layer.</param>
public void Add(Adorner adorner)
{
Contract.Require(adorner, "adorner");
// NOTE: In WPF this doesn't work but it also doesn't produce an error, so we just fail silently here
var adornerLayerParent = VisualTreeHelper.GetParent(this);
if (!adorner.AdornedElement.IsDescendantOf(adornerLayerParent))
return;
var state = new AdornerState(adorner);
state.LastAbsoluteX = adorner.AdornedElement.UntransformedAbsolutePosition.X;
state.LastAbsoluteY = adorner.AdornedElement.UntransformedAbsolutePosition.Y;
state.LastRenderWidth = adorner.AdornedElement.RenderSize.Width;
state.LastRenderHeight = adorner.AdornedElement.RenderSize.Height;
adorners.Add(adorner);
adornersStates.Add(state);
adorner.InvalidateMeasure();
adorner.ChangeLogicalParent(this);
InvalidateMeasure();
InvalidateArrange(true);
}
/// <summary>
/// Removes an adorner from the adorner layer.
/// </summary>
/// <param name="adorner">The adorner to remove from the adorner layer.</param>
public void Remove(Adorner adorner)
{
Contract.Require(adorner, "adorner");
var index = adorners.IndexOf(adorner);
if (index >= 0)
{
adorners.RemoveAt(index);
adornersStates.RemoveAt(index);
adorner.ChangeLogicalParent(null);
}
}
