public void AddChild(UIElement child)
{
if (child.Parent != null)
{
throw new Exception("Tried to add a child that already has a parent!");
}
if (!Children.Contains(child))
{
if (!ToAdd.Add(child))
{
throw new Exception("Tried to add a child twice!");
}
}
else
{
throw new Exception("Tried to add a child that already belongs to this element!");
}
}
public void RemoveChild(UIElement child)
{
if (Children.Contains(child))
{
if (!ToRemove.Add(child))
{
throw new Exception("Tried to remove a child twice!");
}
}
else
{
throw new Exception("Tried to remove a child that does not belong to this element!");
}
}
public bool HasChild(UIElement element)
{
return Children.Contains(element) && !ToRemove.Contains(element);
}
