Nette\Forms\Container::addSubmit PHP Метод

    public function addSubmit($name, $caption = NULL)
    {
        return $this[$name] = new Controls\SubmitButton($caption);
    }

 /**
  * @return \Nextras\Datagrid\Datagrid
  */
 protected function createComponentGrid()
 {
     $grid = new MyDatagrid();
     $grid->setTranslator($this->translator);
     $grid->setShowCheckboxes(FALSE);
     $grid->addColumn('login', 'Uživatel')->enableSort();
     $grid->addColumn('ip', 'IP adresa')->enableSort();
     $grid->addColumn('message', 'Zpráva')->enableSort();
     $grid->addColumn('timestamp', 'Datum a čas')->enableSort();
     $grid->setRowPrimaryKey('syslogID');
     $model = $this->historyRepository;
     $grid->setColumnGetterCallback(function ($row, $column) {
         $getter = "get" . ucfirst($column);
         return $row->{$getter}();
     });
     $grid->setDatasourceCallback(function ($filter, $order, $paginator) use($model) {
         $data = $model->read($paginator)->select("syslog.*, user.login, user.ip AS loginIP");
         foreach ($filter as $k => $v) {
             $k = str_replace("login", "user.login", $k);
             $k = str_replace("ip", "syslog.ip", $k);
             $data->where($k . " LIKE ?", "%" . $v . "%");
         }
         if ($order) {
             $order = str_replace("login", "user.login", implode(" ", $order));
             $order = str_replace("ip", "syslog.ip", $order);
             $data->order($order);
         } else {
             $data->order("timestamp DESC");
         }
         return $data;
     });
     $grid->setPagination(10, function ($filter) use($model) {
         $data = $model->read();
         foreach ($filter as $k => $v) {
             $k = str_replace("login", "user.login", $k);
             $k = str_replace("ip", "syslog.ip", $k);
             $data->where($k . " LIKE ?", "%" . $v . "%");
         }
         return $data->count('*');
     });
     $grid->setFilterFormFactory(function () {
         $form = new Container();
         $form->addText("login", "Uživatel");
         $form->addText("ip", "IP adresa");
         $form->addText("message", "Zpráva");
         // these buttons are not compulsory
         $form->addSubmit('filter', 'Filtrovat')->getControlPrototype()->class = 'btn btn-primary';
         $form->addSubmit('cancel', 'Storno')->getControlPrototype()->class = 'btn btn-default';
         return $form;
     });
     return $grid;
 }