|
|
/****************************************************************************
|
|
|
**
|
|
|
** Copyright (C) 2013 Digia Plc
|
|
|
** All rights reserved.
|
|
|
** For any questions to Digia, please use contact form at http://qt.digia.com
|
|
|
**
|
|
|
** This file is part of the Qt Commercial Charts Add-on.
|
|
|
**
|
|
|
** $QT_BEGIN_LICENSE$
|
|
|
** Licensees holding valid Qt Commercial licenses may use this file in
|
|
|
** accordance with the Qt Commercial License Agreement provided with the
|
|
|
** Software or, alternatively, in accordance with the terms contained in
|
|
|
** a written agreement between you and Digia.
|
|
|
**
|
|
|
** If you have questions regarding the use of this file, please use
|
|
|
** contact form at http://qt.digia.com
|
|
|
** $QT_END_LICENSE$
|
|
|
**
|
|
|
****************************************************************************/
|
|
|
|
|
|
#include "xyseriesiodevice.h"
|
|
|
#include <QXYSeries>
|
|
|
|
|
|
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)
|
|
|
{
|
|
|
qint64 range = 2000;
|
|
|
QList<QPointF> oldPoints = m_series->points();
|
|
|
QList<QPointF> points;
|
|
|
int resolution = 4;
|
|
|
|
|
|
if (oldPoints.count() < range) {
|
|
|
points = m_series->points();
|
|
|
} else {
|
|
|
for (int i = maxSize/resolution; i < oldPoints.count(); i++)
|
|
|
points.append(QPointF(i - maxSize/resolution, oldPoints.at(i).y()));
|
|
|
}
|
|
|
|
|
|
qint64 size = points.count();
|
|
|
for (int k = 0; k < maxSize/resolution; k++)
|
|
|
points.append(QPointF(k + size, ((quint8)data[resolution * k] - 128)/128.0));
|
|
|
|
|
|
m_series->replace(points);
|
|
|
return maxSize;
|
|
|
}
|
|
|
|
