/**
  * Displays the eventlist print window
  *
  * @param   string  $tpl  - The template
  *
  * @return  mixed
  */
 public function display($tpl = null)
 {
     $input = JFactory::getApplication()->input;
     $cid = $input->getInt('cid', 0);
     $todo = $input->get('todo', '');
     if (empty($cid)) {
         JError::_raiseError("COM_MATUKIO_NO_ID");
         return;
     }
     switch ($todo) {
         default:
         case "csvlist":
             // TODO implement userchecking
             $this->art = $input->getInt('art', 0);
             $this->cid = $cid;
             $this->setLayout("csv");
             break;
         case "invoice":
             // TODO implement userchecking
             $this->art = $input->getInt('art', 0);
             $this->uid = $input->getInt('uid', 0);
             $this->uuid = $input->get('uuid', 0);
             $this->setLayout("invoice");
             break;
         case "ticket":
             $this->art = $input->getInt('art', 0);
             $this->uid = $input->getInt('uid', 0);
             $this->uuid = $input->get('uuid', 0);
             $this->setLayout("ticket");
             break;
     }
     parent::display($tpl);
 }