main.cpp Example File | Qt Charts 5.12.8

- Qt 5.12
- Qt Charts
- Piechart Drilldown Example
- main.cpp Example File
- Qt Charts | Commercial or GPLv3

# main.cpp Example File

piechartdrilldown/main.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2016 The Qt Company Ltd.
     ** Contact: https://www.qt.io/licensing/
     **
     ** This file is part of the Qt Charts module of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:GPL$
     ** Commercial License Usage
     ** Licensees holding valid commercial Qt licenses may use this file in
     ** accordance with the commercial license agreement provided with the
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     ** Alternatively, this file may be used under the terms of the GNU
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     ** the Free Software Foundation and appearing in the file LICENSE.GPL3
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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();
     }