protected function writeGridlineStyle($oGridlines, $styleName)
{
if (!$oGridlines instanceof Chart\Gridlines) {
return;
}
// style:style
$this->xmlContent->startElement('style:style');
$this->xmlContent->writeAttribute('style:name', $styleName);
$this->xmlContent->writeAttribute('style:family', 'chart');
// style:style > style:graphic-properties
$this->xmlContent->startElement('style:graphic-properties');
$this->xmlContent->writeAttribute('svg:stroke-width', number_format(CommonDrawing::pointsToCentimeters($oGridlines->getOutline()->getWidth()), 2, '.', '') . 'cm');
$this->xmlContent->writeAttribute('svg:stroke-color', '#' . $oGridlines->getOutline()->getFill()->getStartColor()->getRGB());
$this->xmlContent->endElement();
// ##style:style
$this->xmlContent->endElement();
}