[news.eclipse.modeling.gmf] Re: IUndoContext and Undo/Redo actions

[Alex Shatalin <vano@xxxxxxxxxxx>]

Hello Javier,

> But then I find a problem with working with the
> TransactionalEditingDomain.commandStack(). If I have an EMF command,
This will be an instance of org.eclipse.emf.workspace.impl.WorkspaceCommandStackImpl.createHistoryListener(). 


> and I execute it this way:
> editingDomain().getCommandStack().execute(command) I don't really know
> which context it is operating under, since that CommandStack has no
> UndoContext and EMF command have no UndoContext either. But when you
See WorkspaceCommandStackImpl.DomainListener + org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor. 
These two listeners will finally attach necessary undo context to each EMF 
operation executed via EMF command stack, so each operation executed via 
GMF/EMF command stack or just an AbstractEMFOperation executed on Operation 
History finally will be associated with EditingDomainUndoContext (an instance 
returned from DiagramEditor.getUndoContext()).

> How is this possible? Which undo context have those commands executed
> in the TransactionalEditingDomain? I need to understand this because
EditingDomainUndoContext (==DiagramEditor.getUndoContext())

-----------------
Alex Shatalin