/// <summary>
///
/// </summary>
private void Invalidate()
{
if (Target.Parent == null)
{
return;
}
var top = shadowMask.IsTop() ? borderWidth : 0;
var bottom = shadowMask.IsBottom() ? borderWidth : 0;
var left = shadowMask.IsLeft() ? borderWidth : 0;
var right = shadowMask.IsRight() ? borderWidth : 0;
var rect = new Rectangle(Target.Left - left, Target.Top - top, Target.Width + left + right, Target.Height + top + bottom);
Target.Parent.Invalidate(rect);
}
