/**
     * This method defines and adds all the actions required for UI functions required in the
     * Graphical Viewer, to the Menu Manager.
     */
    private final void appendActions()
    {
        IToolBarManager toolBarManager = getViewSite().getActionBars().getToolBarManager();

        IMenuManager menuManager = getViewSite().getActionBars().getMenuManager();

        List<IAction> toolBarLayoutActions = new ArrayList<IAction>();

        ZoomManager zoomManager = getZoomManager();
        if (zoomManager != null)
        {
            zoomManager.setZoomLevels(new double[] { .1, .3, .5, .7, 1.0, 1.5, 3, 6, 10, 15 });
            zoomInAction = new ZoomInAction(zoomManager);
            // Set ActionDefinitionId to null to disable GEF action id which is the Key binding
            zoomInAction.setActionDefinitionId(null);
            toolBarLayoutActions.add(zoomInAction);

            zoomOutAction = new ZoomOutAction(zoomManager);
            // Set ActionDefinitionId to null to disable GEF action id which is the Key binding
            zoomOutAction.setActionDefinitionId(null);
            toolBarLayoutActions.add(zoomOutAction);

            String[] zoomStrings = new String[] { ZoomManager.FIT_ALL, ZoomManager.FIT_HEIGHT,
                    ZoomManager.FIT_WIDTH };
            zoomComboContributionItem = new ZoomComboContributionItem(this,
                    zoomStrings);

            getViewSite().getActionBars().getToolBarManager().add(zoomComboContributionItem);
            ArrayList<String> contributions = new ArrayList<String>();
            contributions.add(ZoomManager.FIT_ALL);
            contributions.add(ZoomManager.FIT_HEIGHT);
            contributions.add(ZoomManager.FIT_WIDTH);
            zoomManager.setZoomLevelContributions(contributions);
        }    
}