public GUILayerItem TraceCollisionPointer(Point location)
{
List <GUILayerItem> items = null;
itemsLayout.CheckRadius(location.X, location.Y, ref items);
if (items != null && items.Count > 0)
{
// choose last item found as it's drawn above any overlapping items in this layer
GUILayerItem item = items[items.Count - 1];
items.Clear();
return(item);
}
return(null);
}