Infinite QLineSeries

gistfile1.txt

/****************************************************************************
**
** Copyright (C) 2020 Miklos Marton <martonmiklosqdev@gmail.com>
** 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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** accordance with the commercial license agreement provided with the
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** 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.
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****************************************************************************/

#include <QtWidgets/QApplication>
#include <QtWidgets/QMainWindow>
#include <QtCharts/QChartView>
#include <QtCharts/QLineSeries>
#include <QtCharts/QLineMarker>
#include <QTimer>

#include <limits>

QT_CHARTS_USE_NAMESPACE

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

//![1]
    QLineSeries *series = new QLineSeries();
//![1]

//![2]
    series->append(0, 6);
    series->append(2, 4);
    series->append(3, 8);
    series->append(7, 4);
    series->append(10, 5);
    *series << QPointF(11, 1) << QPointF(13, 3) << QPointF(17, 6) << QPointF(18, 3) << QPointF(20, 2);
    series->setName("foobar");

    auto series2 = new QLineSeries();
    *series2 << QPointF(std::numeric_limits<qreal>().min(), 5)
             << QPointF(std::numeric_limits<qreal>().max(), 5);
    series2->setPen(QPen(Qt::darkCyan));
    series2->setName("Line");
//![3]
    QChart *chart = new QChart();
    chart->legend()->hide();
    chart->addSeries(series);
    chart->createDefaultAxes();
    chart->addSeries(series2);
    series2->attachAxis(chart->axes(Qt::Horizontal).first());
    series2->attachAxis(chart->axes(Qt::Vertical).first());

    chart->setTitle("Simple line marker example");

    chart->legend()->setVisible(true);

//![3]

//![4]
    QChartView *chartView = new QChartView(chart);
    chartView->setRenderHint(QPainter::Antialiasing);
//![4]


//![5]
    QMainWindow window;
    window.setCentralWidget(chartView);
    window.resize(400, 300);
    window.setWindowTitle("Simple line marker example");
    window.show();
//![5]

    return a.exec();
}