Updating GEF Model from a background thread

Question

Hello, i'm trying to update a Model for GEF and have the changes shown in the view i've created. Currently no change I make is being reflected in the view, i'm using the following approach to update the model and am wondering if its the right approach to take:

Display.getDefault().asyncExec(new Runnable() {
   public void run() {
   String viewId = "beat.views.BeatView";

   IWorkbench workbench = PlatformUI.getWorkbench();

   IWorkbenchWindow mainWindow = workbench
     .getActiveWorkbenchWindow();

   try {

    BeatView view = (BeatView) mainWindow.getActivePage()
      .showView(viewId);

    BeatEditPart beatEditPart = (BeatEditPart)view.getGraphicalViewer().getContents();

    BeatModel beatModel = (BeatModel)beatEditPart.getModel();
    beatModel.setObjects(model);
   } catch (PartInitException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }
 });

Answer 1

Is your EditPart listening to model changes?

1 - You need to register as a listener to your model. We use EMF's notify mechanism.

public void activate() {
    if (!isActive())
        ((EObject) getModel()).eAdapters().add(this);
    super.activate();
}

public void deactivate() {
    if (isActive())
        ((EObject) getModel()).eAdapters().remove(this);
    super.deactivate();
}

2 - You need to act when something changes.

public void notifyChanged(Notification notification) {
...
}