[news.eclipse.modeling.gmf] Implementing some actions for my own Navigat

[Javier <j.cardenete@xxxxxxxxxx>]

Hello guys,

I have an application in which I need some extra functionality in my 
Navigator view for the model resource. For example I can create model 
elements through some actions in context menus (these model elements 
will appear randomly located in the diagram). I also need this viewer to 
access the undo/redo mechanism in the Edit menu.

To achieve this, I implemented my own CommonActionProvider and it is 
being used from the Navigator. I followed the code I found for the 
ProjectExplorer of Eclipse and I tried to modify it, telling the 
UndoRedo actions to use the IUndoContext of my diagram. This is part of 
the code:


	public void init(ICommonActionExtensionSite anActionSite) {
            IUndoContext context = ((DiagramEditor)PlatformUI.
		getWorkbench().getActiveWorkbenchWindow().
		getActivePage().getActiveEditor()).
		getDiagramEditDomain().getDiagramCommandStack().				getUndoContext();

            IWorkbenchPartSite site = ((DiagramEditor)PlatformUI.			 
getWorkbench().getActiveWorkbenchWindow().
		getActivePage().getActiveEditor()).getSite();

            undoRedoGroup = new UndoRedoActionGroup(site,
                                workspaceContext, true);
        }

        public void dispose() {
                undoRedoGroup.dispose();
        }

        public void fillActionBars(IActionBars actionBars) {
		actionBars.setGlobalActionHandler
		(ActionFactory.UNDO.getId(), new 
GlobalUndoAction(((DiagramEditor)PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor())));
                undoRedoGroup.fillActionBars(actionBars);
        }


But this code is not working as I would like, since if I made changes in 
the diagram and afterwards I put the focus on my navigator viewer, the 
Undo/Redo shows nothing. Instead, if from the package explorer I move a 
file from one folder to another, and then I go back and select one of 
the elements that enables my ActionProvider, in the undo/redo I can undo 
 the moved element. But for example, doing this:

public void fillContextMenu(IMenuManager menu) {
            menu.add(new 
GlobalUndoAction(((DiagramEditor)PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor())));
                undoRedoGroup.fillContextMenu(menu);

        }

I do get the UndoAction working properly in the context menu.

Any hint on how to get this behavior working in the ActionBars?

Thank u!