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3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the Qt Charts module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:GPL$
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28****************************************************************************/
29
30#include "chart.h"
31#include "chartview.h"
32#include <QtWidgets/QApplication>
33#include <QtWidgets/QMainWindow>
34#include <QtCore/QtMath>
35#include <QtCore/QRandomGenerator>
36#include <QtCharts/QLineSeries>
37#include <QtCharts/QValueAxis>
38
39QT_CHARTS_USE_NAMESPACE
40
41int main(int argc, char *argv[])
42{
43 QApplication a(argc, argv);
44
45//![1]
46 QLineSeries *series = new QLineSeries();
47 for (int i = 0; i < 500; i++) {
48 QPointF p((qreal) i, qSin(M_PI / 50 * i) * 100);
49 p.ry() += QRandomGenerator::global()->bounded(highest: 20);
50 *series << p;
51 }
52//![1]
53
54 Chart *chart = new Chart();
55 chart->addSeries(series);
56 chart->setTitle("Zoom in/out example");
57 chart->setAnimationOptions(QChart::SeriesAnimations);
58 chart->legend()->hide();
59 chart->createDefaultAxes();
60
61 ChartView *chartView = new ChartView(chart);
62 chartView->setRenderHint(hint: QPainter::Antialiasing);
63
64 QMainWindow window;
65 window.setCentralWidget(chartView);
66 window.resize(w: 400, h: 300);
67 window.grabGesture(type: Qt::PanGesture);
68 window.grabGesture(type: Qt::PinchGesture);
69 window.show();
70
71 return a.exec();
72}
73

source code of qtcharts/examples/charts/zoomlinechart/main.cpp