/**
* Write chart
*
* @param \PhpOffice\PhpPowerpoint\Shared\XMLWriter $objWriter XML Writer
* @param \PhpOffice\PhpPowerpoint\Shape\Chart $shape
* @param int $shapeId
*/
private function writeShapeChart(XMLWriter $objWriter, ShapeChart $shape, $shapeId)
{
// p:graphicFrame
$objWriter->startElement('p:graphicFrame');
// p:nvGraphicFramePr
$objWriter->startElement('p:nvGraphicFramePr');
// p:cNvPr
$objWriter->startElement('p:cNvPr');
$objWriter->writeAttribute('id', $shapeId);
$objWriter->writeAttribute('name', $shape->getName());
$objWriter->writeAttribute('descr', $shape->getDescription());
$objWriter->endElement();
// p:cNvGraphicFramePr
$objWriter->writeElement('p:cNvGraphicFramePr', null);
// p:nvPr
$objWriter->writeElement('p:nvPr', null);
$objWriter->endElement();
// p:xfrm
$objWriter->startElement('p:xfrm');
$objWriter->writeAttribute('rot', SharedDrawing::degreesToAngle($shape->getRotation()));
// a:off
$objWriter->startElement('a:off');
$objWriter->writeAttribute('x', SharedDrawing::pixelsToEmu($shape->getOffsetX()));
$objWriter->writeAttribute('y', SharedDrawing::pixelsToEmu($shape->getOffsetY()));
$objWriter->endElement();
// a:ext
$objWriter->startElement('a:ext');
$objWriter->writeAttribute('cx', SharedDrawing::pixelsToEmu($shape->getWidth()));
$objWriter->writeAttribute('cy', SharedDrawing::pixelsToEmu($shape->getHeight()));
$objWriter->endElement();
$objWriter->endElement();
// a:graphic
$objWriter->startElement('a:graphic');
// a:graphicData
$objWriter->startElement('a:graphicData');
$objWriter->writeAttribute('uri', 'http://schemas.openxmlformats.org/drawingml/2006/chart');
// c:chart
$objWriter->startElement('c:chart');
$objWriter->writeAttribute('xmlns:c', 'http://schemas.openxmlformats.org/drawingml/2006/chart');
$objWriter->writeAttribute('xmlns:r', 'http://schemas.openxmlformats.org/officeDocument/2006/relationships');
$objWriter->writeAttribute('r:id', $shape->relationId);
$objWriter->endElement();
$objWriter->endElement();
$objWriter->endElement();
$objWriter->endElement();
}