public function editAction()
 {
     $form = new SimpleCal_Form_Event(array('action' => $this->view->baseUrl . '/event/edit'));
     $form->populate($this->_getAllParams());
     if ($this->getRequest()->isPost()) {
         $params = $this->_getAllParams();
         if ($form->isValid($params)) {
             $event = SimpleCal_Model_Event::getInstanceByForm($form);
             $event->save();
             if ($month = $event->getStartTimeMonth()) {
                 $this->_redirect("/month/{$month}", array('exit' => false));
             } else {
                 $this->_redirect('/', array('exit' => false));
             }
             $this->_setParam('event_id', $event->getId());
             $this->_forward('invitation');
             return;
         }
     } elseif ($eventId = $this->_getParam('id')) {
         $event = SimpleCal_Model_Event::getInstanceById($eventId);
         $form->populate($event->getFormContainer());
     }
     $this->view->form = $form;
 }