main.cpp Example File | Qt Charts 5.12.11

- Qt 5.12
- Qt Charts
- Polar Chart Example
- main.cpp Example File
- Qt Charts | Commercial or GPLv3

# main.cpp Example File

polarchart/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
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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 "chartview.h"
     #include <QtWidgets/QApplication>
     #include <QtWidgets/QMainWindow>
     #include <QtCharts/QScatterSeries>
     #include <QtCharts/QLineSeries>
     #include <QtCharts/QSplineSeries>
     #include <QtCharts/QAreaSeries>
     #include <QtCharts/QValueAxis>
     #include <QtCharts/QPolarChart>
     #include <QtCore/QDebug>

     QT_CHARTS_USE_NAMESPACE

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

         const qreal angularMin = -100;
         const qreal angularMax = 100;

         const qreal radialMin = -100;
         const qreal radialMax = 100;

         QScatterSeries *series1 = new QScatterSeries();
         series1->setName("scatter");
         for (int i = angularMin; i <= angularMax; i += 10)
             series1->append(i, (i / radialMax) * radialMax + 8.0);

         QSplineSeries *series2 = new QSplineSeries();
         series2->setName("spline");
         for (int i = angularMin; i <= angularMax; i += 10)
             series2->append(i, (i / radialMax) * radialMax);

         QLineSeries *series3 = new QLineSeries();
         series3->setName("star outer");
         qreal ad = (angularMax - angularMin) / 8;
         qreal rd = (radialMax - radialMin) / 3 * 1.3;
         series3->append(angularMin, radialMax);
         series3->append(angularMin + ad*1, radialMin + rd);
         series3->append(angularMin + ad*2, radialMax);
         series3->append(angularMin + ad*3, radialMin + rd);
         series3->append(angularMin + ad*4, radialMax);
         series3->append(angularMin + ad*5, radialMin + rd);
         series3->append(angularMin + ad*6, radialMax);
         series3->append(angularMin + ad*7, radialMin + rd);
         series3->append(angularMin + ad*8, radialMax);

         QLineSeries *series4 = new QLineSeries();
         series4->setName("star inner");
         ad = (angularMax - angularMin) / 8;
         rd = (radialMax - radialMin) / 3;
         series4->append(angularMin, radialMax);
         series4->append(angularMin + ad*1, radialMin + rd);
         series4->append(angularMin + ad*2, radialMax);
         series4->append(angularMin + ad*3, radialMin + rd);
         series4->append(angularMin + ad*4, radialMax);
         series4->append(angularMin + ad*5, radialMin + rd);
         series4->append(angularMin + ad*6, radialMax);
         series4->append(angularMin + ad*7, radialMin + rd);
         series4->append(angularMin + ad*8, radialMax);

         QAreaSeries *series5 = new QAreaSeries();
         series5->setName("star area");
         series5->setUpperSeries(series3);
         series5->setLowerSeries(series4);
         series5->setOpacity(0.5);

         QPolarChart *chart = new QPolarChart();
         chart->addSeries(series1);
         chart->addSeries(series2);
         chart->addSeries(series3);
         chart->addSeries(series4);
         chart->addSeries(series5);

         chart->setTitle("Use arrow keys to scroll, +/- to zoom, and space to switch chart type.");

         QValueAxis *angularAxis = new QValueAxis();
         angularAxis->setTickCount(9); // First and last ticks are co-located on 0/360 angle.
         angularAxis->setLabelFormat("%.1f");
         angularAxis->setShadesVisible(true);
         angularAxis->setShadesBrush(QBrush(QColor(249, 249, 255)));
         chart->addAxis(angularAxis, QPolarChart::PolarOrientationAngular);

         QValueAxis *radialAxis = new QValueAxis();
         radialAxis->setTickCount(9);
         radialAxis->setLabelFormat("%d");
         chart->addAxis(radialAxis, QPolarChart::PolarOrientationRadial);

         series1->attachAxis(radialAxis);
         series1->attachAxis(angularAxis);
         series2->attachAxis(radialAxis);
         series2->attachAxis(angularAxis);
         series3->attachAxis(radialAxis);
         series3->attachAxis(angularAxis);
         series4->attachAxis(radialAxis);
         series4->attachAxis(angularAxis);
         series5->attachAxis(radialAxis);
         series5->attachAxis(angularAxis);

         radialAxis->setRange(radialMin, radialMax);
         angularAxis->setRange(angularMin, angularMax);

         ChartView *chartView = new ChartView();
         chartView->setChart(chart);
         chartView->setRenderHint(QPainter::Antialiasing);

         QMainWindow window;
         window.setCentralWidget(chartView);
         window.resize(800, 600);
         window.show();

         return a.exec();
     }