main.cpp Example File

  /****************************************************************************
  **
  ** 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
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** GNU General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU
  ** General Public License version 3 or (at your option) any later version
  ** approved by the KDE Free Qt Foundation. The licenses are as published by
  ** the Free Software Foundation and appearing in the file LICENSE.GPL3
  ** included in the packaging of this file. Please review the following
  ** information to ensure the GNU General Public License requirements will
  ** be met: https://www.gnu.org/licenses/gpl-3.0.html.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  #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();
  }