protected function writeTypeArea(XMLWriter $objWriter, Area $subject, $includeSheet = false)
{
// c:lineChart
$objWriter->startElement('c:areaChart');
// c:grouping
$objWriter->startElement('c:grouping');
$objWriter->writeAttribute('val', 'standard');
$objWriter->endElement();
// Write series
$seriesIndex = 0;
foreach ($subject->getSeries() as $series) {
// c:ser
$objWriter->startElement('c:ser');
// c:ser > c:idx
$objWriter->startElement('c:idx');
$objWriter->writeAttribute('val', $seriesIndex);
$objWriter->endElement();
// c:ser > c:order
$objWriter->startElement('c:order');
$objWriter->writeAttribute('val', $seriesIndex);
$objWriter->endElement();
// c:ser > c:tx
$objWriter->startElement('c:tx');
$coords = $includeSheet ? 'Sheet1!$' . \PHPExcel_Cell::stringFromColumnIndex(1 + $seriesIndex) . '$1' : '';
$this->writeSingleValueOrReference($objWriter, $includeSheet, $series->getTitle(), $coords);
$objWriter->endElement();
// c:ser > c:dLbls
$objWriter->startElement('c:dLbls');
// c:ser > c:dLbls > c:txPr
$objWriter->startElement('c:txPr');
// c:ser > c:dLbls > c:txPr > a:bodyPr
$objWriter->writeElement('a:bodyPr', null);
// c:ser > c:dLbls > c:txPr > a:lstStyle
$objWriter->writeElement('a:lstStyle', null);
// c:ser > c:dLbls > c:txPr > a:p
$objWriter->startElement('a:p');
// c:ser > c:dLbls > c:txPr > a:p > a:pPr
$objWriter->startElement('a:pPr');
// c:ser > c:dLbls > c:txPr > a:p > a:pPr > a:defRPr
$objWriter->startElement('a:defRPr');
$objWriter->writeAttribute('b', $series->getFont()->isBold() ? 'true' : 'false');
$objWriter->writeAttribute('i', $series->getFont()->isItalic() ? 'true' : 'false');
$objWriter->writeAttribute('strike', $series->getFont()->isStrikethrough() ? 'sngStrike' : 'noStrike');
$objWriter->writeAttribute('sz', $series->getFont()->getSize() * 100);
$objWriter->writeAttribute('u', $series->getFont()->getUnderline());
$objWriter->writeAttributeIf($series->getFont()->isSuperScript(), 'baseline', '30000');
$objWriter->writeAttributeIf($series->getFont()->isSubScript(), 'baseline', '-25000');
// c:ser > c:dLbls > c:txPr > a:p > a:pPr > a:defRPr > a:solidFill
$objWriter->startElement('a:solidFill');
$this->writeColor($objWriter, $series->getFont()->getColor());
// c:ser > c:dLbls > c:txPr > a:p > a:pPr > a:defRPr > ## a:solidFill
$objWriter->endElement();
// c:ser > c:dLbls > c:txPr > a:p > a:pPr > a:defRPr > a:latin
$objWriter->startElement('a:latin');
$objWriter->writeAttribute('typeface', $series->getFont()->getName());
$objWriter->endElement();
// c:ser > c:dLbls > c:txPr > a:p > a:pPr > ##a:defRPr
$objWriter->endElement();
// c:ser > c:dLbls > c:txPr > a:p > ##a:pPr
$objWriter->endElement();
// c:ser > c:dLbls > c:txPr > a:p > a:endParaRPr
$objWriter->startElement('a:endParaRPr');
$objWriter->writeAttribute('lang', 'en-US');
$objWriter->writeAttribute('dirty', '0');
$objWriter->endElement();
// c:ser > c:dLbls > c:txPr > ##a:p
$objWriter->endElement();
// c:ser > c:dLbls > ##c:txPr
$objWriter->endElement();
// c:ser > c:dLbls > c:dLblPos
$this->writeElementWithValAttribute($objWriter, 'c:dLblPos', $series->getLabelPosition());
// c:ser > c:dLbls > c:showVal
$this->writeElementWithValAttribute($objWriter, 'c:showVal', $series->hasShowValue() ? '1' : '0');
// c:ser > c:dLbls > c:showCatName
$this->writeElementWithValAttribute($objWriter, 'c:showCatName', $series->hasShowCategoryName() ? '1' : '0');
// c:ser > c:dLbls > c:showSerName
$this->writeElementWithValAttribute($objWriter, 'c:showSerName', $series->hasShowSeriesName() ? '1' : '0');
// c:ser > c:dLbls > c:showPercent
$this->writeElementWithValAttribute($objWriter, 'c:showPercent', $series->hasShowPercentage() ? '1' : '0');
// c:ser > c:dLbls > c:showLeaderLines
$this->writeElementWithValAttribute($objWriter, 'c:showLeaderLines', $series->hasShowLeaderLines() ? '1' : '0');
// c:ser > ##c:dLbls
$objWriter->endElement();
if ($series->getFill()->getFillType() != Fill::FILL_NONE) {
// c:spPr
$objWriter->startElement('c:spPr');
// Write fill
$this->writeFill($objWriter, $series->getFill());
// ## c:spPr
$objWriter->endElement();
}
// Write X axis data
$axisXData = array_keys($series->getValues());
// c:cat
$objWriter->startElement('c:cat');
$this->writeMultipleValuesOrReference($objWriter, $includeSheet, $axisXData, 'Sheet1!$A$2:$A$' . (1 + count($axisXData)));
$objWriter->endElement();
// Write Y axis data
$axisYData = array_values($series->getValues());
// c:val
$objWriter->startElement('c:val');
$coords = $includeSheet ? 'Sheet1!$' . \PHPExcel_Cell::stringFromColumnIndex($seriesIndex + 1) . '$2:$' . \PHPExcel_Cell::stringFromColumnIndex($seriesIndex + 1) . '$' . (1 + count($axisYData)) : '';
$this->writeMultipleValuesOrReference($objWriter, $includeSheet, $axisYData, $coords);
$objWriter->endElement();
$objWriter->endElement();
++$seriesIndex;
}
// c:marker
$objWriter->startElement('c:marker');
$objWriter->writeAttribute('val', '1');
$objWriter->endElement();
// c:smooth
$objWriter->startElement('c:smooth');
$objWriter->writeAttribute('val', '0');
$objWriter->endElement();
// c:axId
$objWriter->startElement('c:axId');
$objWriter->writeAttribute('val', '52743552');
$objWriter->endElement();
// c:axId
$objWriter->startElement('c:axId');
$objWriter->writeAttribute('val', '52749440');
$objWriter->endElement();
$objWriter->endElement();
}
