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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd
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** All rights reserved.
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** For any questions to The Qt Company, please use contact form at http://qt.io
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**
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** This file is part of the Qt Charts module.
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**
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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** agreement between you and The Qt Company.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.io
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**
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****************************************************************************/
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#include "chart.h"
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#include <QtCharts/QAbstractAxis>
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#include <QtCharts/QSplineSeries>
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#include <QtCharts/QValueAxis>
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#include <QtCore/QTime>
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#include <QtCore/QDebug>
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Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags):
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QChart(QChart::ChartTypeCartesian, parent, wFlags),
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m_series(0),
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m_axis(new QValueAxis),
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m_step(0),
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m_x(5),
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m_y(1)
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{
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qsrand((uint) QTime::currentTime().msec());
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QObject::connect(&m_timer, SIGNAL(timeout()), this, SLOT(handleTimeout()));
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m_timer.setInterval(1000);
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m_series = new QSplineSeries(this);
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QPen green(Qt::red);
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green.setWidth(3);
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m_series->setPen(green);
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m_series->append(m_x, m_y);
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addSeries(m_series);
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createDefaultAxes();
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setAxisX(m_axis, m_series);
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m_axis->setTickCount(5);
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axisX()->setRange(0, 10);
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axisY()->setRange(-5, 10);
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m_timer.start();
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}
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Chart::~Chart()
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{
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}
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void Chart::handleTimeout()
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{
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qreal x = plotArea().width() / m_axis->tickCount();
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qreal y = (m_axis->max() - m_axis->min()) / m_axis->tickCount();
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m_x += y;
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m_y = qrand() % 5 - 2.5;
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m_series->append(m_x, m_y);
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scroll(x, 0);
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if (m_x == 100)
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m_timer.stop();
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}
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