else if (e instanceof AnnotateROI) handleAnnotateROI((AnnotateROI) e);
    public void eventFired(AgentEvent e)     {        if (e instanceof ImageLoaded)            handleImageLoaded((ImageLoaded) e);        else if (e instanceof ImageRendered)            handleImageRendered((ImageRendered) e);        else if (e instanceof LoadImage)            handleLoadImage((LoadImage) e);        else if (e instanceof AddROICanvas)            handleAddROI((AddROICanvas) e);        //else if (e instanceof DisplayViewer3D)        //    handleDisplayViewer3D((DisplayViewer3D) e);    }