chartview.cpp Example File | Qt Charts 5.12.9

- Qt 5.12
- Qt Charts
- ScatterChart Example
- chartview.cpp Example File
- Qt Charts | Commercial or GPLv3

# chartview.cpp Example File

scatterchart/chartview.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 "chartview.h"
     #include <QtCharts/QScatterSeries>
     #include <QtCharts/QLegendMarker>
     #include <QtGui/QImage>
     #include <QtGui/QPainter>
     #include <QtCore/QtMath>

     ChartView::ChartView(QWidget *parent) :
         QChartView(new QChart(), parent)
     {
         QScatterSeries *series0 = new QScatterSeries();
         series0->setName("scatter1");
         series0->setMarkerShape(QScatterSeries::MarkerShapeCircle);
         series0->setMarkerSize(15.0);

         QScatterSeries *series1 = new QScatterSeries();
         series1->setName("scatter2");
         series1->setMarkerShape(QScatterSeries::MarkerShapeRectangle);
         series1->setMarkerSize(20.0);

         QScatterSeries *series2 = new QScatterSeries();
         series2->setName("scatter3");
         series2->setMarkerShape(QScatterSeries::MarkerShapeRectangle);
         series2->setMarkerSize(30.0);

         series0->append(0, 6);
         series0->append(2, 4);
         series0->append(3, 8);
         series0->append(7, 4);
         series0->append(10, 5);

         *series1 << QPointF(1, 1) << QPointF(3, 3) << QPointF(7, 6) << QPointF(8, 3) << QPointF(10, 2);
         *series2 << QPointF(1, 5) << QPointF(4, 6) << QPointF(6, 3) << QPointF(9, 5);

         QPainterPath starPath;
         starPath.moveTo(28, 15);
         for (int i = 1; i < 5; ++i) {
             starPath.lineTo(14 + 14 * qCos(0.8 * i * M_PI),
                             15 + 14 * qSin(0.8 * i * M_PI));
         }
         starPath.closeSubpath();

         QImage star(30, 30, QImage::Format_ARGB32);
         star.fill(Qt::transparent);

         QPainter painter(&star);
         painter.setRenderHint(QPainter::Antialiasing);
         painter.setPen(QRgb(0xf6a625));
         painter.setBrush(painter.pen().color());
         painter.drawPath(starPath);

         series2->setBrush(star);
         series2->setPen(QColor(Qt::transparent));

         setRenderHint(QPainter::Antialiasing);
         chart()->addSeries(series0);
         chart()->addSeries(series1);
         chart()->addSeries(series2);

         chart()->setTitle("Simple scatterchart example");
         chart()->createDefaultAxes();
         chart()->setDropShadowEnabled(false);

         chart()->legend()->setMarkerShape(QLegend::MarkerShapeFromSeries);
     }