xyseriesiodevice.cpp
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CppLexer
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r2435 | /**************************************************************************** | ||
** | ||||
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r2776 | ** Copyright (C) 2015 The Qt Company Ltd | ||
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r2435 | ** All rights reserved. | ||
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r2776 | ** For any questions to The Qt Company, please use contact form at http://qt.io | ||
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r2435 | ** | ||
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r2740 | ** This file is part of the Qt Charts module. | ||
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r2435 | ** | ||
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r2740 | ** Licensees holding valid commercial license for Qt may use this file in | ||
** accordance with the Qt License Agreement provided with the Software | ||||
** or, alternatively, in accordance with the terms contained in a written | ||||
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r2776 | ** agreement between you and The Qt Company. | ||
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r2435 | ** | ||
** If you have questions regarding the use of this file, please use | ||||
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r2740 | ** contact form at http://qt.io | ||
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r2435 | ** | ||
****************************************************************************/ | ||||
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r2155 | #include "xyseriesiodevice.h" | ||
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r2714 | #include <QtCharts/QXYSeries> | ||
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r2155 | |||
XYSeriesIODevice::XYSeriesIODevice(QXYSeries * series, QObject *parent) : | ||||
QIODevice(parent), | ||||
m_series(series) | ||||
{ | ||||
} | ||||
qint64 XYSeriesIODevice::readData(char * data, qint64 maxSize) | ||||
{ | ||||
Q_UNUSED(data) | ||||
Q_UNUSED(maxSize) | ||||
return -1; | ||||
} | ||||
qint64 XYSeriesIODevice::writeData(const char * data, qint64 maxSize) | ||||
{ | ||||
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r2214 | qint64 range = 2000; | ||
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r2820 | QVector<QPointF> oldPoints = m_series->pointsVector(); | ||
QVector<QPointF> points; | ||||
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r2214 | int resolution = 4; | ||
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r2155 | |||
if (oldPoints.count() < range) { | ||||
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r2820 | points = m_series->pointsVector(); | ||
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r2155 | } else { | ||
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r2214 | for (int i = maxSize/resolution; i < oldPoints.count(); i++) | ||
points.append(QPointF(i - maxSize/resolution, oldPoints.at(i).y())); | ||||
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r2155 | } | ||
qint64 size = points.count(); | ||||
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r2214 | for (int k = 0; k < maxSize/resolution; k++) | ||
points.append(QPointF(k + size, ((quint8)data[resolution * k] - 128)/128.0)); | ||||
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r2155 | |||
m_series->replace(points); | ||||
return maxSize; | ||||
} | ||||