/// <summary>
/// Remove object by index.
/// Used for Undo.
/// </summary>
public void RemoveAt(int index)
{
DrawObject o = graphicsList[index];
// if (o.DrawArea != null) o.DrawArea.EndTextBoxEdit(false);
graphicsList.RemoveAt(index);
//onGateRemoved();
OnDrawObjsChanged(new ArrayChangedEventArgs <DrawObject>(o, ArrayChangedType.ItemRemoved));
}
/// <summary>
/// Replace object in specified place.
/// Used for Undo.
/// </summary>
public void Replace(int index, DrawObject obj)
{
if (index >= 0 && index < graphicsList.Count)
{
graphicsList.RemoveAt(index);
graphicsList.Insert(index, obj);
}
}