main.cpp Example File

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  ** Contact: https://www.qt.io/licensing/
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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/QTime>
  #include <QtCharts/QChartView>
  #include <QtCharts/QLegend>
  #include <QtCharts/QPieSeries>

  QT_CHARTS_USE_NAMESPACE

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

      qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));

      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");

      QList<QString> months;
      months << "Jan" << "Feb" << "Mar" << "Apr" << "May" << "Jun" << "Jul" << "Aug" << "Sep" << "Oct" << "Nov" << "Dec";
      QList<QString> names;
      names << "Jane" << "John" << "Axel" << "Mary" << "Susan" << "Bob";

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

          foreach (QString month, months)
          *series << new DrilldownSlice(qrand() % 1000, month, yearSeries);

          QObject::connect(series, SIGNAL(clicked(QPieSlice*)), chart, SLOT(handleSliceClicked(QPieSlice*)));

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

      QObject::connect(yearSeries, SIGNAL(clicked(QPieSlice*)), chart, SLOT(handleSliceClicked(QPieSlice*)));

      chart->changeSeries(yearSeries);

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

      return a.exec();
  }