Going way back in time it was not possible to add more than one instance of the same model element to a diagram in ArgoUML.
Looking at http://argouml.tigris.org/issues/show_bug.cgi?id=6251 is the first time I've realised that this restriction has been removed. The restriction would appear to have been removed in release 0.27.2. I don't know who did this, if it was the result of some issue requesting this or actually an unintended change. To my mind this is a good thing but I don't think its been tested enough. I don't know of any other UML tool where this restriction exists. The problem in issue 6251 is as a result of the GraphModel classes used in ArgoUML. At the moment there is both a Diagram and a GraphModel for each actual ArgoUML diagram. I've never really understood why this is but I think I have some idea now and this is just ancient history that shouldn't be relevant any more. When an element is added to a diagram the element is placed in the GraphModel and the Fig representing that element is placed in the Diagram. So the graph model can tell us what elements are in a diagram and the diagram the visual representations. Why would that be? We can find the elements by look at all the Figs in the diagram and getting their owners. The problem in issue 6521 is because when a Fig is removed from the Diagram it will remove the model element from the GraphModel. That fires an event telling the Diagram an element has been removed and so the Diagram tries to delete a Fig with that model element. I suspect the GraphModel date from way before ArgoUML had any 3rd party model repository. Even before NSUML and way before our model interface. When ArgoUML was adapted for NSUML I think the GraphModel concept should have been dropped then but it seemed to remain in place as something that sat between the diagrams and NSUML (and now between the diagrams and the model interface). Our implementations of the model interface are the model and I think we need no separate "graphmodel". I'd like to try to remove the GraphModel classes. It may be a slow process which involves initially removing just some parts of its functionality till they're gone altogether. Regards Bob ------------------------------------------------------ http://argouml.tigris.org/ds/viewMessage.do?dsForumId=450&dsMessageId=2733659 To unsubscribe from this discussion, e-mail: [dev-unsubscr...@argouml.tigris.org]. To be allowed to post to the list contact the mailing list moderator, email: [li...@tigris.org]
