/**
* Write drawings to XML format
*
* @param PHPExcel_Worksheet $pWorksheet
* @param int &$chartRef Chart ID
* @param boolean $includeCharts Flag indicating if we should include drawing details for charts
* @return string XML Output
* @throws PHPExcel_Writer_Exception
*/
public function writeDrawings(PHPExcel_Worksheet $pWorksheet = null, &$chartRef, $includeCharts = FALSE)
{
// Create XML writer
$objWriter = null;
if ($this->getParentWriter()->getUseDiskCaching()) {
$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
} else {
$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);
}
// XML header
$objWriter->startDocument('1.0','UTF-8','yes');
// xdr:wsDr
$objWriter->startElement('xdr:wsDr');
$objWriter->writeAttribute('xmlns:xdr', 'http://schemas.openxmlformats.org/drawingml/2006/spreadsheetDrawing');
$objWriter->writeAttribute('xmlns:a', 'http://schemas.openxmlformats.org/drawingml/2006/main');
// Loop through ATS_REPORT_IMAGE and write drawings
$i = 1;
$iterator = $pWorksheet->getDrawingCollection()->getIterator();
while ($iterator->valid()) {
$this->_writeDrawing($objWriter, $iterator->current(), $i);
$iterator->next();
++$i;
}
if ($includeCharts) {
$chartCount = $pWorksheet->getChartCount();
// Loop through charts and write the chart position
if ($chartCount > 0) {
for ($c = 0; $c < $chartCount; ++$c) {
$this->_writeChart($objWriter, $pWorksheet->getChartByIndex($c), $c+$i);
}
}
}
$objWriter->endElement();
// Return
return $objWriter->getData();
}
