Qt 5.8 | Qt Charts | Donut Chart Breakdown Example | main.cpp Example File

Qt 5.8.0 Reference Documentation

# main.cpp Example File

donutbreakdown/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
      ** 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();
      }