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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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29
30#ifndef DATASOURCE_H
31#define DATASOURCE_H
32
33#include <QtCore/QObject>
34#include <QtCharts/QXYSeries>
35#include <QtWidgets/QLabel>
36#include <QtCore/QElapsedTimer>
37#include <QtCore/QTimer>
38
39QT_CHARTS_USE_NAMESPACE
40
41class DataSource : public QObject
42{
43 Q_OBJECT
44public:
45 explicit DataSource(QObject *parent = 0);
46
47 void startUpdates(const QList<QXYSeries *> &seriesList, QLabel *fpsLabel);
48
49public slots:
50 void generateData(int seriesCount, int rowCount, int colCount);
51 void update(QAbstractSeries *series, int seriesIndex);
52 void handleSceneChanged();
53 void updateAllSeries();
54
55private:
56 QVector<QVector<QVector<QPointF> > > m_data;
57 int m_index;
58 QList<QXYSeries *> m_seriesList;
59 QLabel *m_fpsLabel;
60 QElapsedTimer m_fpsTimer;
61 QTimer m_dataUpdater;
62};
63
64#endif // DATASOURCE_H
65

source code of qtcharts/examples/charts/openglseries/datasource.h