protected function submitEditZone()
    {
        if ($this->isPosted('delete')) {
            $this->deleteZone();
        } else if ($this->isPosted('save') && $this->validateEditZone()) {
            if (isset($this->data_zone['zone_id'])) {
                $this->updateZone();
            } else {
                $this->addZone();
            }
        }
    }