Qt 5.7 | Qt Charts | Donut Chart Breakdown Example | main.cpp Example File

Qt 5.7.1 Reference Documentation

# main.cpp Example File

donutbreakdown/main.cpp

      /****************************************************************************
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      ** Copyright (C) 2016 The Qt Company Ltd.
      ** 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 <QtWidgets/QApplication>
      #include <QtWidgets/QMainWindow>
      #include <QtWidgets/QStatusBar>
      #include <QtCharts/QChartView>
      #include "donutbreakdownchart.h"

      QT_CHARTS_USE_NAMESPACE

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

          // Graph is based on data of 'Total consumption of energy increased by 10 per cent in 2010'
          // Statistics Finland, 13 December 2011
          // http://www.stat.fi/til/ekul/2010/ekul_2010_2011-12-13_tie_001_en.html

          QPieSeries *series1 = new QPieSeries();
          series1->setName("Fossil fuels");
          series1->append("Oil", 353295);
          series1->append("Coal", 188500);
          series1->append("Natural gas", 148680);
          series1->append("Peat", 94545);

          QPieSeries *series2 = new QPieSeries();
          series2->setName("Renewables");
          series2->append("Wood fuels", 319663);
          series2->append("Hydro power", 45875);
          series2->append("Wind power", 1060);

          QPieSeries *series3 = new QPieSeries();
          series3->setName("Others");
          series3->append("Nuclear energy", 238789);
          series3->append("Import energy", 37802);
          series3->append("Other", 32441);

          DonutBreakdownChart *donutBreakdown = new DonutBreakdownChart();
          donutBreakdown->setAnimationOptions(QChart::AllAnimations);
          donutBreakdown->setTitle("Total consumption of energy in Finland 2010");
          donutBreakdown->legend()->setAlignment(Qt::AlignRight);
          donutBreakdown->addBreakdownSeries(series1, Qt::red);
          donutBreakdown->addBreakdownSeries(series2, Qt::darkGreen);
          donutBreakdown->addBreakdownSeries(series3, Qt::darkBlue);

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

          return a.exec();
      }