datasource.cpp
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| 1.6 KiB
| text/x-c
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CppLexer
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r1783 | /**************************************************************************** | ||
** | ||||
** Copyright (C) 2012 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 "datasource.h" | ||||
#include <QXYSeries> | ||||
#include <QDebug> | ||||
QTCOMMERCIALCHART_USE_NAMESPACE | ||||
DataSource::DataSource(QObject *parent) : | ||||
QObject(parent), | ||||
m_index(0) | ||||
{ | ||||
const int rowCount = 5; | ||||
const int colCount = 1024; | ||||
for (int i(0); i < rowCount; i++) { | ||||
QList<QPointF> points; | ||||
for (int j(0); j < colCount; j++) { | ||||
qreal x = j; | ||||
qreal y = sin(3.14159265358979 / 50 * x) + 0.5 + (qreal) rand() / (qreal) RAND_MAX; | ||||
points.append(QPointF(x, y)); | ||||
} | ||||
m_data.append(points); | ||||
} | ||||
} | ||||
void DataSource::update(QAbstractSeries *series) | ||||
{ | ||||
QXYSeries *xySeries = qobject_cast<QXYSeries *>(series); | ||||
Q_ASSERT(xySeries); | ||||
QList<QPointF> points = m_data.at(m_index); | ||||
//xySeries->clear(); | ||||
//xySeries->append(points); | ||||
xySeries->replace(points); | ||||
m_index = (m_index + 1) % m_data.count(); | ||||
} | ||||