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/****************************************************************************
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**
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** Copyright (C) 2014 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.io
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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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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** agreement between you and Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.io
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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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QList<QPointF> oldPoints = m_series->points();
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QList<QPointF> points;
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int resolution = 4;
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if (oldPoints.count() < range) {
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points = m_series->points();
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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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