Chart height was changed automatically when did attach multiple axis.

[yanagida]

Hello,

I'm trying make multi chart.
To start with, I changed the following example chart.

http://doc.qt.io/QtCharts/qtcharts-multiaxis-main-cpp.html

int main(int argc, char *argv[])
{
    ...
    QCategoryAxis *axisY3 = new QCategoryAxis;
    axisY3->append("Low", 5);
    axisY3->append("Medium", 12);
    axisY3->append("High", 17);
    axisY3->setLinePenColor(series->pen().color());
    axisY3->setGridLinePen((series->pen()));

    chart->addAxis(axisY3, Qt::AlignRight);
    series->attachAxis(axisX);
    series->attachAxis(axisY3);
    
    //Added code
    series = new QSplineSeries;
    chart->addSeries(series);
    QValueAxis *axisY4 = new QValueAxis;
    axisY4->setLinePenColor(series->pen().color());
    chart->addAxis(axisY4, Qt::AlignLeft);
    series->attachAxis(axisX);
    series->attachAxis(axisY4);
    ...
    Add to axis the axis10 from axis5.
    ...
    series = new QSplineSeries;
    chart->addSeries(series);
    QValueAxis *axisY11 = new QValueAxis;
    axisY11->setLinePenColor(series->pen().color());
    chart->addAxis(axisY11, Qt::AlignLeft);
    series->attachAxis(axisX);
    series->attachAxis(axisY11);
    //Added code

    QChartView *chartView = new QChartView(chart);
    chartView->setRenderHint(QPainter::Antialiasing);

    QMainWindow window;
    window.setCentralWidget(chartView);
    window.resize(800, 600);
    window.show();

    return a.exec();
}

As a result, chart height was changed automatically.
I know that, can adjust chart height by call the "chart->setMaximumHeight(500)".
I made the Dynamic multi-scroll chart(using the setMaximumHeight()).But, chart height was changed automatically when chart was scrolled.

Please teach me the proper way to set the height of the chart .