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/****************************************************************************
**
** 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 "chart.h"
#include <QtCharts/QAbstractAxis>
#include <QtCharts/QSplineSeries>
#include <QtCharts/QValueAxis>
#include <QtCore/QRandomGenerator>
#include <QtCore/QDebug>
Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags):
QChart(QChart::ChartTypeCartesian, parent, wFlags),
m_series(0),
m_axisX(new QValueAxis()),
m_axisY(new QValueAxis()),
m_step(0),
m_x(5),
m_y(1)
{
QObject::connect(&m_timer, &QTimer::timeout, this, &Chart::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);
addAxis(m_axisX,Qt::AlignBottom);
addAxis(m_axisY,Qt::AlignLeft);
m_series->attachAxis(m_axisX);
m_series->attachAxis(m_axisY);
m_axisX->setTickCount(5);
m_axisX->setRange(0, 10);
m_axisY->setRange(-5, 10);
m_timer.start();
}
Chart::~Chart()
{
}
void Chart::handleTimeout()
{
qreal x = plotArea().width() / m_axisX->tickCount();
qreal y = (m_axisX->max() - m_axisX->min()) / m_axisX->tickCount();
m_x += y;
m_y = QRandomGenerator::global()->bounded(5) - 2.5;
m_series->append(m_x, m_y);
scroll(x, 0);
if (m_x == 100)
m_timer.stop();
}
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