public function setReadorder($pValue = 0)
    {
        if ($pValue < 0 || $pValue > 2) {
            $pValue = 0;
        }
        if ($this->isSupervisor) {
            $styleArray = $this->getStyleArray(array('readorder' => $pValue));
            $this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
        } else {
            $this->readorder = $pValue;
        }
        return $this;
    }