exam_timer_teacher/xlsx/xlsxchart.cpp

/****************************************************************************
** Copyright (c) 2013-2014 Debao Zhang <hello@debao.me>
** All right reserved.
**
** Permission is hereby granted, free of charge, to any person obtaining
** a copy of this software and associated documentation files (the
** "Software"), to deal in the Software without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Software, and to
** permit persons to whom the Software is furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be
** included in all copies or substantial portions of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
** NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
** LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
** OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
** WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
**
****************************************************************************/

#include "xlsxchart_p.h"
#include "xlsxworksheet.h"
#include "xlsxcellrange.h"
#include "xlsxutility_p.h"

#include <QIODevice>
#include <QXmlStreamReader>
#include <QXmlStreamWriter>
#include <QDebug>

QT_BEGIN_NAMESPACE_XLSX

ChartPrivate::ChartPrivate(Chart *q, Chart::CreateFlag flag)
    :AbstractOOXmlFilePrivate(q, flag), chartType(static_cast<Chart::ChartType>(0))
{

}

ChartPrivate::~ChartPrivate()
{

}

/*!
 * \class Chart
 * \inmodule QtXlsx
 * \brief Main class for the charts.
 */

/*!
  \enum Chart::ChartType

  \value CT_Area
  \value CT_Area3D,
  \value CT_Line,
  \value CT_Line3D,
  \value CT_Scatter,
  \value CT_Pie,
  \value CT_Pie3D,
  \value CT_Doughnut,
  \value CT_Bar,
  \value CT_Bar3D,

  \omitvalue CT_Stock,
  \omitvalue CT_Radar,
  \omitvalue CT_OfPie,
  \omitvalue CT_Surface,
  \omitvalue CT_Surface3D,
  \omitvalue CT_Bubble
*/

/*!
 * \internal
 */
Chart::Chart(AbstractSheet *parent, CreateFlag flag)
    :AbstractOOXmlFile(new ChartPrivate(this, flag))
{
    d_func()->sheet = parent;
}

/*!
 * Destroys the chart.
 */
Chart::~Chart()
{
}

/*!
 * Add the data series which is in the range \a range of the \a sheet.
 */
void Chart::addSeries(const CellRange &range, AbstractSheet *sheet)
{
    Q_D(Chart);
    if (!range.isValid())
        return;
    if (sheet && sheet->sheetType() != AbstractSheet::ST_WorkSheet)
        return;
    if (!sheet && d->sheet->sheetType() != AbstractSheet::ST_WorkSheet)
        return;

    QString sheetName = sheet ? sheet->sheetName() : d->sheet->sheetName();
    //In case sheetName contains space or '
    sheetName = escapeSheetName(sheetName);

    if (range.columnCount() == 1 || range.rowCount() == 1) {
        QSharedPointer<XlsxSeries> series = QSharedPointer<XlsxSeries>(new XlsxSeries);
        series->numberDataSource_numRef = sheetName + QLatin1String("!") + range.toString(true, true);
        d->seriesList.append(series);
    } else if (range.columnCount() < range.rowCount()) {
        //Column based series
        int firstDataColumn = range.firstColumn();
        QString axDataSouruce_numRef;
        if (d->chartType == CT_Scatter || d->chartType == CT_Bubble) {
            firstDataColumn += 1;
            CellRange subRange(range.firstRow(), range.firstColumn(), range.lastRow(), range.firstColumn());
            axDataSouruce_numRef = sheetName + QLatin1String("!") + subRange.toString(true, true);
        }

        for (int col=firstDataColumn; col<=range.lastColumn(); ++col) {
            CellRange subRange(range.firstRow(), col, range.lastRow(), col);
            QSharedPointer<XlsxSeries> series = QSharedPointer<XlsxSeries>(new XlsxSeries);
            series->axDataSource_numRef = axDataSouruce_numRef;
            series->numberDataSource_numRef = sheetName + QLatin1String("!") + subRange.toString(true, true);
            d->seriesList.append(series);
        }

    } else {
        //Row based series
        int firstDataRow = range.firstRow();
        QString axDataSouruce_numRef;
        if (d->chartType == CT_Scatter || d->chartType == CT_Bubble) {
            firstDataRow += 1;
            CellRange subRange(range.firstRow(), range.firstColumn(), range.firstRow(), range.lastColumn());
            axDataSouruce_numRef = sheetName + QLatin1String("!") + subRange.toString(true, true);
        }

        for (int row=firstDataRow; row<=range.lastRow(); ++row) {
            CellRange subRange(row, range.firstColumn(), row, range.lastColumn());
            QSharedPointer<XlsxSeries> series = QSharedPointer<XlsxSeries>(new XlsxSeries);
            series->axDataSource_numRef = axDataSouruce_numRef;
            series->numberDataSource_numRef = sheetName + QLatin1String("!") + subRange.toString(true, true);
            d->seriesList.append(series);
        }
    }
}

/*!
 * Set the type of the chart to \a type
 */
void Chart::setChartType(ChartType type)
{
    Q_D(Chart);
    d->chartType = type;
}

/*!
 * \internal
 *
 */
void Chart::setChartStyle(int id)
{
    Q_UNUSED(id)
    //!Todo
}

/*!
 * \internal
 */
void Chart::saveToXmlFile(QIODevice *device) const
{
    Q_D(const Chart);

    QXmlStreamWriter writer(device);

    writer.writeStartDocument(QStringLiteral("1.0"), true);
    writer.writeStartElement(QStringLiteral("c:chartSpace"));
    writer.writeAttribute(QStringLiteral("xmlns:c"), QStringLiteral("http://schemas.openxmlformats.org/drawingml/2006/chart"));
    writer.writeAttribute(QStringLiteral("xmlns:a"), QStringLiteral("http://schemas.openxmlformats.org/drawingml/2006/main"));
    writer.writeAttribute(QStringLiteral("xmlns:r"), QStringLiteral("http://schemas.openxmlformats.org/officeDocument/2006/relationships"));

    d->saveXmlChart(writer);

    writer.writeEndElement();//c:chartSpace
    writer.writeEndDocument();
}

/*!
 * \internal
 */
bool Chart::loadFromXmlFile(QIODevice *device)
{
    Q_D(Chart);

    QXmlStreamReader reader(device);
    while (!reader.atEnd()) {
        reader.readNextStartElement();
        if (reader.tokenType() == QXmlStreamReader::StartElement) {
            if (reader.name() == QLatin1String("chart")) {
                if (!d->loadXmlChart(reader))
                    return false;
            }
        }
    }
    return true;
}

bool ChartPrivate::loadXmlChart(QXmlStreamReader &reader)
{
    Q_ASSERT(reader.name() == QLatin1String("chart"));

    while (!reader.atEnd()) {
        reader.readNextStartElement();
        if (reader.tokenType() == QXmlStreamReader::StartElement) {
            if (reader.name() == QLatin1String("plotArea")) {
                if (!loadXmlPlotArea(reader))
                    return false;
            } else if (reader.name() == QLatin1String("legend")) {
                //!Todo
            }
        } else if (reader.tokenType() == QXmlStreamReader::EndElement &&
                   reader.name() == QLatin1String("chart")) {
            break;
        }
    }
    return true;
}

bool ChartPrivate::loadXmlPlotArea(QXmlStreamReader &reader)
{
    Q_ASSERT(reader.name() == QLatin1String("plotArea"));

    while (!reader.atEnd()) {
        reader.readNextStartElement();
        if (reader.tokenType() == QXmlStreamReader::StartElement) {
            if (reader.name() == QLatin1String("layout")) {
                //!ToDo
            } else if (reader.name().endsWith(QLatin1String("Chart"))) {
                //For pieChart, barChart, ...
                loadXmlXxxChart(reader);
            } else if (reader.name().endsWith(QLatin1String("Ax"))) {
                //For valAx, catAx, serAx, dateAx
                loadXmlAxis(reader);
            }

        } else if (reader.tokenType() == QXmlStreamReader::EndElement &&
                   reader.name() == QLatin1String("plotArea")) {
            break;
        }
    }
    return true;
}

bool ChartPrivate::loadXmlXxxChart(QXmlStreamReader &reader)
{
    QStringRef name = reader.name();
    if (name == QLatin1String("pieChart")) chartType = Chart::CT_Pie;
    else if (name == QLatin1String("pie3DChart")) chartType = Chart::CT_Pie3D;
    else if (name == QLatin1String("barChart")) chartType = Chart::CT_Bar;
    else if (name == QLatin1String("bar3DChart")) chartType = Chart::CT_Bar3D;
    else if (name == QLatin1String("lineChart")) chartType = Chart::CT_Line;
    else if (name == QLatin1String("line3DChart")) chartType = Chart::CT_Line3D;
    else if (name == QLatin1String("scatterChart")) chartType = Chart::CT_Scatter;
    else if (name == QLatin1String("areaChart")) chartType = Chart::CT_Area;
    else if (name == QLatin1String("area3DChart")) chartType = Chart::CT_Area3D;
    else if (name == QLatin1String("doughnutChart")) chartType = Chart::CT_Doughnut;
    else qDebug()<<"Cann't load chart: "<<name;

    while (!reader.atEnd()) {
        reader.readNextStartElement();
        if (reader.tokenType() == QXmlStreamReader::StartElement) {
            if (reader.name() == QLatin1String("ser")) {
                loadXmlSer(reader);
            } else if (reader.name() == QLatin1String("axId")) {

            }
        } else if (reader.tokenType() == QXmlStreamReader::EndElement
                   && reader.name() == name) {
            break;
        }
    }
    return true;
}

bool ChartPrivate::loadXmlSer(QXmlStreamReader &reader)
{
    Q_ASSERT(reader.name() == QLatin1String("ser"));

    QSharedPointer<XlsxSeries> series = QSharedPointer<XlsxSeries>(new XlsxSeries);
    seriesList.append(series);

    while (!reader.atEnd() && !(reader.tokenType() == QXmlStreamReader::EndElement
                                && reader.name() == QLatin1String("ser"))) {
        if (reader.readNextStartElement()) {
            QStringRef name = reader.name();
            if (name == QLatin1String("cat") || name == QLatin1String("xVal")) {
                while (!reader.atEnd() && !(reader.tokenType() == QXmlStreamReader::EndElement
                                            && reader.name() == name)) {
                    if (reader.readNextStartElement()) {
                        if (reader.name() == QLatin1String("numRef"))
                            series->axDataSource_numRef = loadXmlNumRef(reader);
                    }
                }
            } else if (name == QLatin1String("val") || name == QLatin1String("yVal")) {
                while (!reader.atEnd() && !(reader.tokenType() == QXmlStreamReader::EndElement
                                            && reader.name() == name)) {
                    if (reader.readNextStartElement()) {
                        if (reader.name() == QLatin1String("numRef"))
                            series->numberDataSource_numRef = loadXmlNumRef(reader);
                    }
                }
            } else if (name == QLatin1String("extLst")) {
                while (!reader.atEnd() && !(reader.tokenType() == QXmlStreamReader::EndElement
                                            && reader.name() == name)) {
                    reader.readNextStartElement();
                }
            }
        }
    }

    return true;
}


QString ChartPrivate::loadXmlNumRef(QXmlStreamReader &reader)
{
    Q_ASSERT(reader.name() == QLatin1String("numRef"));

    while (!reader.atEnd() && !(reader.tokenType() == QXmlStreamReader::EndElement
                                && reader.name() == QLatin1String("numRef"))) {
        if (reader.readNextStartElement()) {
            if (reader.name() == QLatin1String("f"))
                return reader.readElementText();
        }
    }

    return QString();
}

void ChartPrivate::saveXmlChart(QXmlStreamWriter &writer) const
{
    writer.writeStartElement(QStringLiteral("c:chart"));
    writer.writeStartElement(QStringLiteral("c:plotArea"));
    switch (chartType) {
    case Chart::CT_Pie:
    case Chart::CT_Pie3D:
        saveXmlPieChart(writer);
        break;
    case Chart::CT_Bar:
    case Chart::CT_Bar3D:
        saveXmlBarChart(writer);
        break;
    case Chart::CT_Line:
    case Chart::CT_Line3D:
        saveXmlLineChart(writer);
        break;
    case Chart::CT_Scatter:
        saveXmlScatterChart(writer);
        break;
    case Chart::CT_Area:
    case Chart::CT_Area3D:
        saveXmlAreaChart(writer);
        break;
    case Chart::CT_Doughnut:
        saveXmlDoughnutChart(writer);
        break;
    default:
        break;
    }
    saveXmlAxes(writer);
    writer.writeEndElement(); //plotArea

//    saveXmlLegend(writer);

    writer.writeEndElement(); //chart
}

void ChartPrivate::saveXmlPieChart(QXmlStreamWriter &writer) const
{
    QString name = chartType==Chart::CT_Pie ? QStringLiteral("c:pieChart") : QStringLiteral("c:pie3DChart");

    writer.writeStartElement(name);

    //Do the same behavior as Excel, Pie prefer varyColors
    writer.writeEmptyElement(QStringLiteral("c:varyColors"));
    writer.writeAttribute(QStringLiteral("val"), QStringLiteral("1"));

    for (int i=0; i<seriesList.size(); ++i)
        saveXmlSer(writer, seriesList[i].data(), i);

    writer.writeEndElement(); //pieChart, pie3DChart
}

void ChartPrivate::saveXmlBarChart(QXmlStreamWriter &writer) const
{
    QString name = chartType==Chart::CT_Bar ? QStringLiteral("c:barChart") : QStringLiteral("c:bar3DChart");

    writer.writeStartElement(name);

    writer.writeEmptyElement(QStringLiteral("c:barDir"));
    writer.writeAttribute(QStringLiteral("val"), QStringLiteral("col"));

    for (int i=0; i<seriesList.size(); ++i)
        saveXmlSer(writer, seriesList[i].data(), i);

    if (axisList.isEmpty()) {
        //The order the axes??
        const_cast<ChartPrivate*>(this)->axisList.append(QSharedPointer<XlsxAxis>(new XlsxAxis(XlsxAxis::T_Cat, XlsxAxis::Bottom, 0, 1)));
        const_cast<ChartPrivate*>(this)->axisList.append(QSharedPointer<XlsxAxis>(new XlsxAxis(XlsxAxis::T_Val, XlsxAxis::Left, 1, 0)));
    }

    //Note: Bar3D have 2~3 axes
    Q_ASSERT(axisList.size()==2 || (axisList.size()==3 && chartType==Chart::CT_Bar3D));

    for (int i=0; i<axisList.size(); ++i) {
        writer.writeEmptyElement(QStringLiteral("c:axId"));
        writer.writeAttribute(QStringLiteral("val"), QString::number(axisList[i]->axisId));
    }

    writer.writeEndElement(); //barChart, bar3DChart
}

void ChartPrivate::saveXmlLineChart(QXmlStreamWriter &writer) const
{
    QString name = chartType==Chart::CT_Line ? QStringLiteral("c:lineChart") : QStringLiteral("c:line3DChart");

    writer.writeStartElement(name);

    writer.writeEmptyElement(QStringLiteral("grouping"));

    for (int i=0; i<seriesList.size(); ++i)
        saveXmlSer(writer, seriesList[i].data(), i);

    if (axisList.isEmpty()) {
        const_cast<ChartPrivate*>(this)->axisList.append(QSharedPointer<XlsxAxis>(new XlsxAxis(XlsxAxis::T_Cat, XlsxAxis::Bottom, 0, 1)));
        const_cast<ChartPrivate*>(this)->axisList.append(QSharedPointer<XlsxAxis>(new XlsxAxis(XlsxAxis::T_Val, XlsxAxis::Left, 1, 0)));
        if (chartType==Chart::CT_Line3D)
            const_cast<ChartPrivate*>(this)->axisList.append(QSharedPointer<XlsxAxis>(new XlsxAxis(XlsxAxis::T_Ser, XlsxAxis::Bottom, 2, 0)));
    }

    Q_ASSERT((axisList.size()==2||chartType==Chart::CT_Line)|| (axisList.size()==3 && chartType==Chart::CT_Line3D));

    for (int i=0; i<axisList.size(); ++i) {
        writer.writeEmptyElement(QStringLiteral("c:axId"));
        writer.writeAttribute(QStringLiteral("val"), QString::number(axisList[i]->axisId));
    }

    writer.writeEndElement(); //lineChart, line3DChart
}

void ChartPrivate::saveXmlScatterChart(QXmlStreamWriter &writer) const
{
    const QString name = QStringLiteral("c:scatterChart");

    writer.writeStartElement(name);

    writer.writeEmptyElement(QStringLiteral("c:scatterStyle"));

    for (int i=0; i<seriesList.size(); ++i)
        saveXmlSer(writer, seriesList[i].data(), i);

    if (axisList.isEmpty()) {
        const_cast<ChartPrivate*>(this)->axisList.append(QSharedPointer<XlsxAxis>(new XlsxAxis(XlsxAxis::T_Val, XlsxAxis::Bottom, 0, 1)));
        const_cast<ChartPrivate*>(this)->axisList.append(QSharedPointer<XlsxAxis>(new XlsxAxis(XlsxAxis::T_Val, XlsxAxis::Left, 1, 0)));
    }

    Q_ASSERT(axisList.size()==2);

    for (int i=0; i<axisList.size(); ++i) {
        writer.writeEmptyElement(QStringLiteral("c:axId"));
        writer.writeAttribute(QStringLiteral("val"), QString::number(axisList[i]->axisId));
    }

    writer.writeEndElement(); //c:scatterChart
}

void ChartPrivate::saveXmlAreaChart(QXmlStreamWriter &writer) const
{
    QString name = chartType==Chart::CT_Area ? QStringLiteral("c:areaChart") : QStringLiteral("c:area3DChart");

    writer.writeStartElement(name);

    writer.writeEmptyElement(QStringLiteral("grouping"));

    for (int i=0; i<seriesList.size(); ++i)
        saveXmlSer(writer, seriesList[i].data(), i);

    if (axisList.isEmpty()) {
        const_cast<ChartPrivate*>(this)->axisList.append(QSharedPointer<XlsxAxis>(new XlsxAxis(XlsxAxis::T_Cat, XlsxAxis::Bottom, 0, 1)));
        const_cast<ChartPrivate*>(this)->axisList.append(QSharedPointer<XlsxAxis>(new XlsxAxis(XlsxAxis::T_Val, XlsxAxis::Left, 1, 0)));
    }

    //Note: Area3D have 2~3 axes
    Q_ASSERT(axisList.size()==2 || (axisList.size()==3 && chartType==Chart::CT_Area3D));

    for (int i=0; i<axisList.size(); ++i) {
        writer.writeEmptyElement(QStringLiteral("c:axId"));
        writer.writeAttribute(QStringLiteral("val"), QString::number(axisList[i]->axisId));
    }

    writer.writeEndElement(); //lineChart, line3DChart
}

void ChartPrivate::saveXmlDoughnutChart(QXmlStreamWriter &writer) const
{
    QString name = QStringLiteral("c:doughnutChart");

    writer.writeStartElement(name);

    writer.writeEmptyElement(QStringLiteral("c:varyColors"));
    writer.writeAttribute(QStringLiteral("val"), QStringLiteral("1"));

    for (int i=0; i<seriesList.size(); ++i)
        saveXmlSer(writer, seriesList[i].data(), i);

    writer.writeStartElement(QStringLiteral("c:holeSize"));
    writer.writeAttribute(QStringLiteral("val"), QString::number(50));

    writer.writeEndElement();
}

void ChartPrivate::saveXmlSer(QXmlStreamWriter &writer, XlsxSeries *ser, int id) const
{
    writer.writeStartElement(QStringLiteral("c:ser"));
    writer.writeEmptyElement(QStringLiteral("c:idx"));
    writer.writeAttribute(QStringLiteral("val"), QString::number(id));
    writer.writeEmptyElement(QStringLiteral("c:order"));
    writer.writeAttribute(QStringLiteral("val"), QString::number(id));

    if (!ser->axDataSource_numRef.isEmpty()) {
        if (chartType == Chart::CT_Scatter || chartType == Chart::CT_Bubble)
            writer.writeStartElement(QStringLiteral("c:xVal"));
        else
            writer.writeStartElement(QStringLiteral("c:cat"));
        writer.writeStartElement(QStringLiteral("c:numRef"));
        writer.writeTextElement(QStringLiteral("c:f"), ser->axDataSource_numRef);
        writer.writeEndElement();//c:numRef
        writer.writeEndElement();//c:cat or c:xVal
    }

    if (!ser->numberDataSource_numRef.isEmpty()) {
        if (chartType == Chart::CT_Scatter || chartType == Chart::CT_Bubble)
            writer.writeStartElement(QStringLiteral("c:yVal"));
        else
            writer.writeStartElement(QStringLiteral("c:val"));
        writer.writeStartElement(QStringLiteral("c:numRef"));
        writer.writeTextElement(QStringLiteral("c:f"), ser->numberDataSource_numRef);
        writer.writeEndElement();//c:numRef
        writer.writeEndElement();//c:val or c:yVal
    }

    writer.writeEndElement();//c:ser
}

bool ChartPrivate::loadXmlAxis(QXmlStreamReader &reader)
{
    Q_ASSERT(reader.name().endsWith(QLatin1String("Ax")));
    QString name = reader.name().toString();

    XlsxAxis *axis = new XlsxAxis;
    if (name == QLatin1String("valAx"))
        axis->type = XlsxAxis::T_Val;
    else if (name == QLatin1String("catAx"))
        axis->type = XlsxAxis::T_Cat;
    else if (name == QLatin1String("serAx"))
        axis->type = XlsxAxis::T_Ser;
    else
        axis->type = XlsxAxis::T_Date;

    axisList.append(QSharedPointer<XlsxAxis>(axis));

    while (!reader.atEnd()) {
        reader.readNextStartElement();
        if (reader.tokenType() == QXmlStreamReader::StartElement) {
            if (reader.name() == QLatin1String("axPos")) {
                QXmlStreamAttributes attrs = reader.attributes();
                QStringRef pos = attrs.value(QLatin1String("val"));
                if (pos==QLatin1String("l"))
                    axis->axisPos = XlsxAxis::Left;
                else if (pos==QLatin1String("r"))
                    axis->axisPos = XlsxAxis::Right;
                else if (pos==QLatin1String("b"))
                    axis->axisPos = XlsxAxis::Bottom;
                else
                    axis->axisPos = XlsxAxis::Top;
            } else if (reader.name() == QLatin1String("axId")) {
                axis->axisId = reader.attributes().value(QLatin1String("val")).toString().toInt();
            } else if (reader.name() == QLatin1String("crossAx")) {
                axis->crossAx = reader.attributes().value(QLatin1String("val")).toString().toInt();
            }
        } else if (reader.tokenType() == QXmlStreamReader::EndElement
                   && reader.name() == name) {
            break;
        }
    }

    return true;
}

void ChartPrivate::saveXmlAxes(QXmlStreamWriter &writer) const
{
    for (int i=0; i<axisList.size(); ++i) {
        XlsxAxis *axis = axisList[i].data();
        QString name;
        switch (axis->type) {
        case XlsxAxis::T_Cat: name = QStringLiteral("c:catAx"); break;
        case XlsxAxis::T_Val: name = QStringLiteral("c:valAx"); break;
        case XlsxAxis::T_Ser: name = QStringLiteral("c:serAx"); break;
        case XlsxAxis::T_Date: name = QStringLiteral("c:dateAx"); break;
        default: break;
        }

        QString pos;
        switch (axis->axisPos) {
        case XlsxAxis::Top: pos = QStringLiteral("t"); break;
        case XlsxAxis::Bottom: pos = QStringLiteral("b"); break;
        case XlsxAxis::Left: pos = QStringLiteral("l"); break;
        case XlsxAxis::Right: pos = QStringLiteral("r"); break;
        default: break;
        }

        writer.writeStartElement(name);
        writer.writeEmptyElement(QStringLiteral("c:axId"));
        writer.writeAttribute(QStringLiteral("val"), QString::number(axis->axisId));

        writer.writeStartElement(QStringLiteral("c:scaling"));
        writer.writeEmptyElement(QStringLiteral("c:orientation"));
        writer.writeAttribute(QStringLiteral("val"), QStringLiteral("minMax"));
        writer.writeEndElement();//c:scaling

        writer.writeEmptyElement(QStringLiteral("c:axPos"));
        writer.writeAttribute(QStringLiteral("val"), pos);

        writer.writeEmptyElement(QStringLiteral("c:crossAx"));
        writer.writeAttribute(QStringLiteral("val"), QString::number(axis->crossAx));

        writer.writeEndElement();//name
    }
}

QT_END_NAMESPACE_XLSX