| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the Qt Charts module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:GPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 3 or (at your option) any later version |
| ** approved by the KDE Free Qt Foundation. The licenses are as published by |
| ** the Free Software Foundation and appearing in the file LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "wavechart.h" |
| #include <qmath.h> |
| #include <qrandom.h> |
| |
| QT_CHARTS_USE_NAMESPACE |
| |
| static const int numPoints =100; |
| |
| WaveChart::WaveChart(QChart* chart, QWidget* parent) : |
| QChartView(chart, parent), |
| m_series(new QLineSeries()), |
| m_wave(0), |
| m_step(2 * M_PI / numPoints) |
| { |
| QPen blue(Qt::blue); |
| blue.setWidth(3); |
| m_series->setPen(blue); |
| |
| chart->legend()->setVisible(false); |
| |
| int fluctuate = 100; |
| |
| for (qreal x = 0; x <= 2 * M_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 * M_PI; x += m_step, i++) { |
| fluctuate = QRandomGenerator::global()->bounded(100); |
| m_series->replace(x,points[i].y(),x,fabs(sin(x) * fluctuate)); |
| |
| } |
| |
| } |