/**
  * Prcesses the filter for the date selector and return the filter to use instead
  * 
  * @param \Zend_Controller_Request_Abstract $request
  * @param array $filter
  * @param string $dateField
  * @return array The new complete filter to use
  */
 public function getFilter(\Zend_Controller_Request_Abstract $request, array $filter = array(), $dateField = null)
 {
     $this->_actionKey = $request->getActionKey();
     // \MUtil_Echo::r($filter, __CLASS__ . '->' . __FUNCTION__ .' 1');
     $filter = $this->processFilter($request, $filter);
     if ($filter) {
         $model = $this->getModel();
         $model->addFilter($filter);
     }
     // \MUtil_Echo::r($filter, __CLASS__ . '->' . __FUNCTION__ . ' 2');
     $newfilter = $filter;
     if ($this->dateCurrentStart && $this->dateCurrentEnd) {
         if (null === $dateField) {
             $dateField = $this->dateFrom;
         }
         $start = $this->dateCurrentStart->getIso();
         $end = $this->dateCurrentEnd->getIso();
         $newfilter[] = "{$dateField} BETWEEN '{$start}' AND '{$end}'";
     }
     if ($this->dateGroup) {
         $fields = $this->getFields();
         if (isset($fields[$this->dateGroup])) {
             if ($groupfilter = $fields[$this->dateGroup]->getFilter()) {
                 $newfilter[] = $groupfilter;
             }
         }
     }
     return $newfilter;
 }