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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the Qt Enterprise Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
** $QT_END_LICENSE$
**
****************************************************************************/
#include "chart.h"
#include <QAbstractAxis>
#include <QSplineSeries>
#include <QValueAxis>
#include <QTime>
#include <QDebug>
Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags):
QChart(QChart::ChartTypeCartesian, parent, wFlags),
m_series(0),
m_axis(new QValueAxis),
m_step(0),
m_x(5),
m_y(1)
{
qsrand((uint) QTime::currentTime().msec());
QObject::connect(&m_timer, SIGNAL(timeout()), this, SLOT(handleTimeout()));
m_timer.setInterval(1000);
m_series = new QSplineSeries(this);
QPen green(Qt::red);
green.setWidth(3);
m_series->setPen(green);
m_series->append(m_x, m_y);
addSeries(m_series);
createDefaultAxes();
setAxisX(m_axis, m_series);
m_axis->setTickCount(5);
axisX()->setRange(0, 10);
axisY()->setRange(-5, 10);
m_timer.start();
}
Chart::~Chart()
{
}
void Chart::handleTimeout()
{
qreal x = plotArea().width() / m_axis->tickCount();
qreal y = (m_axis->max() - m_axis->min()) / m_axis->tickCount();
m_x += y;
m_y = qrand() % 5 - 2.5;
m_series->append(m_x, m_y);
scroll(x, 0);
if (m_x == 100)
m_timer.stop();
}
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