|
|
/****************************************************************************
|
|
|
**
|
|
|
** Copyright (C) 2015 The Qt Company Ltd
|
|
|
** All rights reserved.
|
|
|
** For any questions to The Qt Company, please use contact form at http://qt.io
|
|
|
**
|
|
|
** This file is part of the Qt Charts module.
|
|
|
**
|
|
|
** 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
|
|
|
** agreement between you and The Qt Company.
|
|
|
**
|
|
|
** If you have questions regarding the use of this file, please use
|
|
|
** contact form at http://qt.io
|
|
|
**
|
|
|
****************************************************************************/
|
|
|
|
|
|
#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));
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
