protected override void UpdateContentCore()
{
base.UpdateContentCore();
DockTarget adornedElement = base.AdornedElement as DockTarget;
if (adornedElement != null)
{
this.DockSiteType = adornedElement.DockSiteType;
SplitterItem splitterItem = adornedElement.FindAncestor <SplitterItem>();
if (splitterItem != null)
{
this.IsFirst = SplitterPanel.GetIsFirst(splitterItem);
this.IsLast = SplitterPanel.GetIsLast(splitterItem);
}
}
}