I have a problem using the UndoManager feature. If I move any node or link around a document, the undo and redo work fine. However when I add or remove a node or link in a document either through a button or event the undo will not work.
I am implementing my own custom nodes and links that extend the GoIconicNode and GoLink. If this question has been answered in another post then just point me to it. Thanks for any help.