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/****************************************************************************
**
** Copyright (C) 2014 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 Enterprise Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise 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 "wavechart.h"
#include <cmath>
QT_CHARTS_USE_NAMESPACE
#define PI 3.14159265358979
static const int numPoints =100;
WaveChart::WaveChart(QChart* chart, QWidget* parent) :
QChartView(chart, parent),
m_series(new QLineSeries()),
m_wave(0),
m_step(2 * PI / numPoints)
{
QPen blue(Qt::blue);
blue.setWidth(3);
m_series->setPen(blue);
chart->legend()->setVisible(false);
QTime now = QTime::currentTime();
qsrand((uint) now.msec());
int fluctuate = 100;
for (qreal x = 0; x <= 2 * PI; x += m_step) {
m_series->append(x, fabs(sin(x) * fluctuate));
}
chart->addSeries(m_series);
chart->createDefaultAxes();
QObject::connect(&m_timer, SIGNAL(timeout()), this, SLOT(update()));
m_timer.setInterval(5000);
m_timer.start();
}
void WaveChart::update()
{
int fluctuate;
const QList<QPointF>& points = m_series->points();
for (qreal i = 0, x = 0; x <= 2 * PI; x += m_step, i++) {
fluctuate = qrand() % 100;
m_series->replace(x,points[i].y(),x,fabs(sin(x) * fluctuate));
}
}
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