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/******************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the Qt Charts module.
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**
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** $QT_BEGIN_LICENSE:COMM$
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**
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** $QT_END_LICENSE$
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**
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******************************************************************************/
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#include "xyseriesiodevice.h"
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#include <QtCharts/QXYSeries>
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XYSeriesIODevice::XYSeriesIODevice(QXYSeries * series, QObject *parent) :
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QIODevice(parent),
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m_series(series)
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{
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}
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qint64 XYSeriesIODevice::readData(char * data, qint64 maxSize)
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{
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Q_UNUSED(data)
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Q_UNUSED(maxSize)
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return -1;
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}
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qint64 XYSeriesIODevice::writeData(const char * data, qint64 maxSize)
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{
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qint64 range = 2000;
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QVector<QPointF> oldPoints = m_series->pointsVector();
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QVector<QPointF> points;
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int resolution = 4;
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if (oldPoints.count() < range) {
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points = m_series->pointsVector();
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} else {
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for (int i = maxSize/resolution; i < oldPoints.count(); i++)
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points.append(QPointF(i - maxSize/resolution, oldPoints.at(i).y()));
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}
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qint64 size = points.count();
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for (int k = 0; k < maxSize/resolution; k++)
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points.append(QPointF(k + size, ((quint8)data[resolution * k] - 128)/128.0));
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m_series->replace(points);
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return maxSize;
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}
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