qt-everywhere-src-5.15.1/qtcharts/examples/charts/audio/xyseriesiodevice.h

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#ifndef XYSERIESIODEVICE_H
#define XYSERIESIODEVICE_H

#include <QtCore/QIODevice>
#include <QtCore/QPointF>
#include <QtCore/QVector>
#include <QtCharts/QChartGlobal>

QT_CHARTS_BEGIN_NAMESPACE
class QXYSeries;
QT_CHARTS_END_NAMESPACE

QT_CHARTS_USE_NAMESPACE

class XYSeriesIODevice : public QIODevice
{
    Q_OBJECT
public:
    explicit XYSeriesIODevice(QXYSeries *series, QObject *parent = nullptr);

    static const int sampleCount = 2000;

protected:
    qint64 readData(char *data, qint64 maxSize) override;
    qint64 writeData(const char *data, qint64 maxSize) override;

private:
    QXYSeries *m_series;
    QVector<QPointF> m_buffer;
};

#endif // XYSERIESIODEVICE_H