public void Collapse(NonterminalExpanded control)
{
StackPanel parent = (control.Parent as StackPanel);
if (parent == null)
throw new Exception("The controls parent is not of type stack panel");
// draw collapsed control
GrammarNodeVDrawVisitor visitor = new GrammarNodeVDrawVisitor();
visitor.visit(control.ReferenceTail);
// get the index of the nonterminal collapsed that wants to expand
int index = parent.Children.IndexOf(control);
if (index < 0)
throw new Exception("Cant find child in my stack panel, uh oh!");
parent.Children.RemoveAt(index);
parent.Children.Insert(index, visitor.DrawnItem);
}
