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<td >Qt 5.9</td><td ><a href="qtcharts-index.html">Qt Charts</a></td><td ><a href="qtcharts-dynamicspline-example.html">Dynamic Spline Example</a></td><td >chart.cpp Example File</td></tr></table><table class="buildversion"><tr>
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<h1 class="title">chart.cpp Example File</h1>
<span class="subtitle">dynamicspline/chart.cpp</span>
<!-- $$$dynamicspline/chart.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">
<span class="comment">/****************************************************************************
**
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include "chart.h"</span>
<span class="preprocessor">#include <QtCharts/QAbstractAxis></span>
<span class="preprocessor">#include <QtCharts/QSplineSeries></span>
<span class="preprocessor">#include <QtCharts/QValueAxis></span>
<span class="preprocessor">#include <QtCore/QTime></span>
<span class="preprocessor">#include <QtCore/QDebug></span>
Chart<span class="operator">::</span>Chart(<span class="type">QGraphicsItem</span> <span class="operator">*</span>parent<span class="operator">,</span> <span class="type">Qt</span><span class="operator">::</span>WindowFlags wFlags):
<span class="type"><a href="qchart.html">QChart</a></span>(<span class="type"><a href="qchart.html">QChart</a></span><span class="operator">::</span>ChartTypeCartesian<span class="operator">,</span> parent<span class="operator">,</span> wFlags)<span class="operator">,</span>
m_series(<span class="number">0</span>)<span class="operator">,</span>
m_axis(<span class="keyword">new</span> <span class="type"><a href="qvalueaxis.html">QValueAxis</a></span>)<span class="operator">,</span>
m_step(<span class="number">0</span>)<span class="operator">,</span>
m_x(<span class="number">5</span>)<span class="operator">,</span>
m_y(<span class="number">1</span>)
{
qsrand((<span class="type">uint</span>) <span class="type">QTime</span><span class="operator">::</span>currentTime()<span class="operator">.</span>msec());
<span class="type">QObject</span><span class="operator">::</span>connect(<span class="operator">&</span>m_timer<span class="operator">,</span> <span class="operator">&</span><span class="type">QTimer</span><span class="operator">::</span>timeout<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Chart<span class="operator">::</span>handleTimeout);
m_timer<span class="operator">.</span>setInterval(<span class="number">1000</span>);
m_series <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsplineseries.html">QSplineSeries</a></span>(<span class="keyword">this</span>);
<span class="type">QPen</span> green(<span class="type">Qt</span><span class="operator">::</span>red);
green<span class="operator">.</span>setWidth(<span class="number">3</span>);
m_series<span class="operator">-</span><span class="operator">></span>setPen(green);
m_series<span class="operator">-</span><span class="operator">></span>append(m_x<span class="operator">,</span> m_y);
addSeries(m_series);
createDefaultAxes();
setAxisX(m_axis<span class="operator">,</span> m_series);
m_axis<span class="operator">-</span><span class="operator">></span>setTickCount(<span class="number">5</span>);
axisX()<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="number">10</span>);
axisY()<span class="operator">-</span><span class="operator">></span>setRange(<span class="operator">-</span><span class="number">5</span><span class="operator">,</span> <span class="number">10</span>);
m_timer<span class="operator">.</span>start();
}
Chart<span class="operator">::</span><span class="operator">~</span>Chart()
{
}
<span class="type">void</span> Chart<span class="operator">::</span>handleTimeout()
{
<span class="type">qreal</span> x <span class="operator">=</span> plotArea()<span class="operator">.</span>width() <span class="operator">/</span> m_axis<span class="operator">-</span><span class="operator">></span>tickCount();
<span class="type">qreal</span> y <span class="operator">=</span> (m_axis<span class="operator">-</span><span class="operator">></span>max() <span class="operator">-</span> m_axis<span class="operator">-</span><span class="operator">></span>min()) <span class="operator">/</span> m_axis<span class="operator">-</span><span class="operator">></span>tickCount();
m_x <span class="operator">+</span><span class="operator">=</span> y;
m_y <span class="operator">=</span> qrand() <span class="operator">%</span> <span class="number">5</span> <span class="operator">-</span> <span class="number">2.5</span>;
m_series<span class="operator">-</span><span class="operator">></span>append(m_x<span class="operator">,</span> m_y);
scroll(x<span class="operator">,</span> <span class="number">0</span>);
<span class="keyword">if</span> (m_x <span class="operator">=</span><span class="operator">=</span> <span class="number">100</span>)
m_timer<span class="operator">.</span>stop();
}
</pre>
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<!-- @@@dynamicspline/chart.cpp -->
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distrib
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Mageia
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6
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x86_64
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media
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core-updates
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by-pkgid
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19952c5e751bf7e3108c3c59625b0f35
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files
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317
