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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt Charts module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial 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 The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 or (at your option) any later version
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** approved by the KDE Free Qt Foundation. The licenses are as published by
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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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 <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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