/**
* Write chart relationships to XML format
*
* @param \PhpOffice\PhpPowerpoint\Shape\Chart $pChart
* @return string XML Output
* @throws \Exception
*/
public function writeChartRelationships(ShapeChart $pChart)
{
// Create XML writer
$objWriter = $this->getXMLWriter();
// XML header
$objWriter->startDocument('1.0', 'UTF-8', 'yes');
// Relationships
$objWriter->startElement('Relationships');
$objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/package/2006/relationships');
// Write spreadsheet relationship?
if ($pChart->hasIncludedSpreadsheet()) {
$this->writeRelationship($objWriter, 1, 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/package', '../embeddings/' . $pChart->getIndexedFilename() . '.xlsx');
}
$objWriter->endElement();
// Return
return $objWriter->getData();
}
