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/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.digia.com
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**
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** This file is part of the Qt Enterprise Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Enterprise licenses may use this file in
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** accordance with the Qt Enterprise License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia.
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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.digia.com
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "chart.h"
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#include <QAbstractAxis>
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#include <QSplineSeries>
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#include <QValueAxis>
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#include <QTime>
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#include <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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