main.cpp Example File

piechartdrilldown/main.cpp
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 ** This file is part of the Qt Charts module of the Qt Toolkit.
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 #include "drilldownchart.h"
 #include "drilldownslice.h"
 #include <QtWidgets/QApplication>
 #include <QtWidgets/QMainWindow>
 #include <QtCore/QRandomGenerator>
 #include <QtCharts/QChartView>
 #include <QtCharts/QLegend>
 #include <QtCharts/QPieSeries>

 QT_CHARTS_USE_NAMESPACE

 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);

     QMainWindow window;

     DrilldownChart *chart = new DrilldownChart();
     chart->setTheme(QChart::ChartThemeLight);
     chart->setAnimationOptions(QChart::AllAnimations);
     chart->legend()->setVisible(true);
     chart->legend()->setAlignment(Qt::AlignRight);

     QPieSeries *yearSeries = new QPieSeries(&window);
     yearSeries->setName("Sales by year - All");

     const QStringList months = {
         "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
     };
     const QStringList names = {
         "Jane", "John", "Axel", "Mary", "Susan", "Bob"
     };

     for (const QString &name : names) {
         QPieSeries *series = new QPieSeries(&window);
         series->setName("Sales by month - " + name);

         for (const QString &month : months)
             *series << new DrilldownSlice(QRandomGenerator::global()->bounded(1000), month, yearSeries);

         QObject::connect(series, &QPieSeries::clicked, chart, &DrilldownChart::handleSliceClicked);

         *yearSeries << new DrilldownSlice(series->sum(), name, series);
     }

     QObject::connect(yearSeries, &QPieSeries::clicked, chart, &DrilldownChart::handleSliceClicked);

     chart->changeSeries(yearSeries);

     QChartView *chartView = new QChartView(chart);
     chartView->setRenderHint(QPainter::Antialiasing);
     window.setCentralWidget(chartView);
     window.resize(800, 500);
     window.show();

     return a.exec();
 }