public void Unregister(IDrawable drawable)
{
ICollection <object> objects = drawable.GetObjects();
foreach (object obj in objects)
{
UI.Children.Remove((UIElement)obj);
}
}
public void Register(IDrawable drawable)
{
ICollection <object> objects = drawable.GetObjects();
foreach (object obj in objects)
{
UIElement element = (UIElement)obj;
if (!UI.Children.Contains(element))
{
UI.Children.Add(element);
}
}
}