Zend: helpers per layout

[aasmdaa]

Sto leggendo il libro Zend Framework in Action e sono bloccato perchè non riesco a visualizzare correttamente il menù nel layout. Di seguito il codice.

In pratica vorrei capire come sfruttare i placeholders anche nell'utilizzo del layout.


application.ini

resources.frontController.plugins.ActionSetup = "Intranet_Controller_Plugin_ActionSetup"
resources.frontController.plugins.ViewSetup = "Intranet_Controller_Plugin_ViewSetup" 

library/Intranet/Controller/Plugin/ViewSetup.php

class Intranet_Controller_Plugin_ViewSetup extends Zend_Controller_Plugin_Abstract {
    
    protected $_view;
    
    public function dispatchLoopStartup(Zend_Controller_Request_Abstract $request) {
        
        $viewRenderer = Zend_Controller_Action_HelperBroker::getStaticHelper('viewRenderer');
        $viewRenderer->init();
        $view = $viewRenderer->view;
        $this->_view = $view;
        
        $view->originalModule = $request->getModuleName();
        $view->originalController = $request->getControllerName();
        $view->originalAction = $request->getActionName();
        $view->doctype('XHTML1_STRICT');
        $prefix = 'Intranet_View_Helper';
        $dir = dirname(__FILE__).'/../../View/Helper';
        $view->addHelperPath($dir, $prefix);

    }
} 

layouts/scripts/layout.phtml

...
            <?php $this->layout()->menu; ?>
...

application/modules/default/controllers/IndexController.php

class IndexController extends Zend_Controller_Action
{

    public function init()
    {
        /* Initialize action controller here */
    }

    public function indexAction()
    {
        // action body
    }

    public function menuAction()
    {
        
        $mainMenu = array(
            array('title'=>'Home','url'=>$this->view->url(array(), null, true)),
            array('title'=>'Places','url'=>$this->view->url(array('controller'=>'place','action'=>'browse'), null, true)),
            array('title'=>'Articles','url'=>$this->view->url(array('controller'=>'articles'), null, true))
        );
        
        
        $this->view->menu = $mainMenu;
        $this->_helper->viewRenderer->setResponseSegment('menu');
        
    }


} 

library/Intranet/Controller/Plugin/ActionSetup.php

class Intranet_Controller_Plugin_ActionSetup extends Zend_Controller_Plugin_Abstract {
    
    public function dispatchLoopStartup(Zend_Controller_Request_Abstract $request) {
        
        $front = Zend_Controller_Front::getInstance();
        
        if(!$front->hasPlugin('Zend_Controller_Plugin_ActionStack')) {
            
            $actionStack = new Zend_Controller_Plugin_ActionStack();
            $front->registerPlugin($actionStack);
        
        } else {
            
            $actionStack = $front->getPlugin('Zend_Controller_Plugin_ActionStack');
            
        }
        
        $menuAction = clone($request);
        $menuAction->setActionName('menu')->setControllerName('index');
        $actionStack->pushStack($menuAction);
        
    }
}