wavechart.cpp
78 lines
| 2.4 KiB
| text/x-c
|
CppLexer
Miikka Heikkinen
|
r2854 | /**************************************************************************** | ||
Michal Klocek
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r875 | ** | ||
Miikka Heikkinen
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r2854 | ** Copyright (C) 2016 The Qt Company Ltd. | ||
** Contact: https://www.qt.io/licensing/ | ||||
Michal Klocek
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r875 | ** | ||
Miikka Heikkinen
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r2854 | ** This file is part of the Qt Charts module of the Qt Toolkit. | ||
Michal Klocek
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r875 | ** | ||
Miikka Heikkinen
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r2854 | ** $QT_BEGIN_LICENSE:GPL$ | ||
Titta Heikkala
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r2845 | ** 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 | ||||
Miikka Heikkinen
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r2854 | ** 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. | ||||
Michal Klocek
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r875 | ** | ||
Titta Heikkala
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r2845 | ** $QT_END_LICENSE$ | ||
** | ||||
Miikka Heikkinen
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r2854 | ****************************************************************************/ | ||
Michal Klocek
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r875 | |||
Michal Klocek
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r867 | #include "wavechart.h" | ||
#include <cmath> | ||||
Titta Heikkala
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r2712 | QT_CHARTS_USE_NAMESPACE | ||
Michal Klocek
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r867 | |||
#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); | ||||
Marek Rosa
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r1622 | chart->legend()->setVisible(false); | ||
Michal Klocek
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r867 | 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); | ||||
Marek Rosa
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r1622 | chart->createDefaultAxes(); | ||
Michal Klocek
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r867 | |||
QObject::connect(&m_timer, SIGNAL(timeout()), this, SLOT(update())); | ||||
m_timer.setInterval(5000); | ||||
m_timer.start(); | ||||
} | ||||
void WaveChart::update() | ||||
{ | ||||
int fluctuate; | ||||
Michal Klocek
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r1057 | const QList<QPointF>& points = m_series->points(); | ||
Michal Klocek
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r867 | for (qreal i = 0, x = 0; x <= 2 * PI; x += m_step, i++) { | ||
fluctuate = qrand() % 100; | ||||
Michal Klocek
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r1057 | m_series->replace(x,points[i].y(),x,fabs(sin(x) * fluctuate)); | ||
Michal Klocek
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r867 | |||
} | ||||
} | ||||