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<h1 class="title">main.cpp Example File</h1>
<span class="subtitle">openglseries/main.cpp</span>
<!-- $$$openglseries/main.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 "datasource.h"</span>
<span class="preprocessor">#include <QtWidgets/QApplication></span>
<span class="preprocessor">#include <QtWidgets/QMainWindow></span>
<span class="preprocessor">#include <QtCharts/QChartView></span>
<span class="preprocessor">#include <QtCharts/QLineSeries></span>
<span class="preprocessor">#include <QtCharts/QScatterSeries></span>
<span class="preprocessor">#include <QtCharts/QValueAxis></span>
<span class="preprocessor">#include <QtCharts/QLogValueAxis></span>
<span class="preprocessor">#include <QtWidgets/QLabel></span>
<span class="comment">// Uncomment to use logarithmic axes instead of regular value axes</span>
<span class="comment">//#define USE_LOG_AXIS</span>
<span class="comment">// Uncomment to use regular series instead of OpenGL accelerated series</span>
<span class="comment">//#define DONT_USE_GL_SERIES</span>
<span class="comment">// Uncomment to add a simple regular series (thick line) and a matching OpenGL series (thinner line)</span>
<span class="comment">// to verify the series have same visible geometry.</span>
<span class="comment">//#define ADD_SIMPLE_SERIES</span>
QT_CHARTS_USE_NAMESPACE
<span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span>argv<span class="operator">[</span><span class="operator">]</span>)
{
<span class="type">QApplication</span> a(argc<span class="operator">,</span> argv);
<span class="type">QStringList</span> colors;
colors <span class="operator"><</span><span class="operator"><</span> <span class="string">"red"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"blue"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"green"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"black"</span>;
<span class="type"><a href="qchart.html">QChart</a></span> <span class="operator">*</span>chart <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qchart.html">QChart</a></span>();
chart<span class="operator">-</span><span class="operator">></span>legend()<span class="operator">-</span><span class="operator">></span>hide();
<span class="preprocessor">#ifdef USE_LOG_AXIS</span>
<span class="type"><a href="qlogvalueaxis.html">QLogValueAxis</a></span> <span class="operator">*</span>axisX <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlogvalueaxis.html">QLogValueAxis</a></span>;
<span class="type"><a href="qlogvalueaxis.html">QLogValueAxis</a></span> <span class="operator">*</span>axisY <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlogvalueaxis.html">QLogValueAxis</a></span>;
<span class="preprocessor">#else</span>
<span class="type"><a href="qvalueaxis.html">QValueAxis</a></span> <span class="operator">*</span>axisX <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvalueaxis.html">QValueAxis</a></span>;
<span class="type"><a href="qvalueaxis.html">QValueAxis</a></span> <span class="operator">*</span>axisY <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvalueaxis.html">QValueAxis</a></span>;
<span class="preprocessor">#endif</span>
chart<span class="operator">-</span><span class="operator">></span>addAxis(axisX<span class="operator">,</span> <span class="type">Qt</span><span class="operator">::</span>AlignBottom);
chart<span class="operator">-</span><span class="operator">></span>addAxis(axisY<span class="operator">,</span> <span class="type">Qt</span><span class="operator">::</span>AlignLeft);
<span class="keyword">const</span> <span class="type">int</span> seriesCount <span class="operator">=</span> <span class="number">10</span>;
<span class="preprocessor">#ifdef DONT_USE_GL_SERIES</span>
<span class="keyword">const</span> <span class="type">int</span> pointCount <span class="operator">=</span> <span class="number">100</span>;
chart<span class="operator">-</span><span class="operator">></span>setTitle(<span class="string">"Unaccelerated Series"</span>);
<span class="preprocessor">#else</span>
<span class="keyword">const</span> <span class="type">int</span> pointCount <span class="operator">=</span> <span class="number">10000</span>;
chart<span class="operator">-</span><span class="operator">></span>setTitle(<span class="string">"OpenGL Accelerated Series"</span>);
<span class="preprocessor">#endif</span>
<span class="type">QList</span><span class="operator"><</span><span class="type"><a href="qxyseries.html">QXYSeries</a></span> <span class="operator">*</span><span class="operator">></span> seriesList;
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> seriesCount; i<span class="operator">+</span><span class="operator">+</span>) {
<span class="type"><a href="qxyseries.html">QXYSeries</a></span> <span class="operator">*</span>series <span class="operator">=</span> <span class="number">0</span>;
<span class="type">int</span> colorIndex <span class="operator">=</span> i <span class="operator">%</span> colors<span class="operator">.</span>size();
<span class="keyword">if</span> (i <span class="operator">%</span> <span class="number">2</span>) {
series <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qscatterseries.html">QScatterSeries</a></span>;
<span class="type"><a href="qscatterseries.html">QScatterSeries</a></span> <span class="operator">*</span>scatter <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="qscatterseries.html">QScatterSeries</a></span> <span class="operator">*</span><span class="operator">></span>(series);
scatter<span class="operator">-</span><span class="operator">></span>setColor(<span class="type">QColor</span>(colors<span class="operator">.</span>at(colorIndex)));
scatter<span class="operator">-</span><span class="operator">></span>setMarkerSize(<span class="type">qreal</span>(colorIndex <span class="operator">+</span> <span class="number">2</span>) <span class="operator">/</span> <span class="number">2.0</span>);
<span class="comment">// Scatter pen doesn't have affect in OpenGL drawing, but if you disable OpenGL drawing</span>
<span class="comment">// this makes the marker border visible and gives comparable marker size to OpenGL</span>
<span class="comment">// scatter points.</span>
scatter<span class="operator">-</span><span class="operator">></span>setPen(<span class="type">QPen</span>(<span class="string">"black"</span>));
} <span class="keyword">else</span> {
series <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineseries.html">QLineSeries</a></span>;
series<span class="operator">-</span><span class="operator">></span>setPen(<span class="type">QPen</span>(<span class="type">QBrush</span>(<span class="type">QColor</span>(colors<span class="operator">.</span>at(colorIndex)))<span class="operator">,</span>
<span class="type">qreal</span>(colorIndex <span class="operator">+</span> <span class="number">2</span>) <span class="operator">/</span> <span class="number">2.0</span>));
}
seriesList<span class="operator">.</span>append(series);
<span class="preprocessor">#ifdef DONT_USE_GL_SERIES</span>
series<span class="operator">-</span><span class="operator">></span>setUseOpenGL(<span class="keyword">false</span>);
<span class="preprocessor">#else</span>
series<span class="operator">-</span><span class="operator">></span>setUseOpenGL(<span class="keyword">true</span>);
<span class="preprocessor">#endif</span>
chart<span class="operator">-</span><span class="operator">></span>addSeries(series);
series<span class="operator">-</span><span class="operator">></span>attachAxis(axisX);
series<span class="operator">-</span><span class="operator">></span>attachAxis(axisY);
}
<span class="keyword">if</span> (axisX<span class="operator">-</span><span class="operator">></span>type() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qabstractaxis.html">QAbstractAxis</a></span><span class="operator">::</span>AxisTypeLogValue)
axisX<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0.1</span><span class="operator">,</span> <span class="number">20.0</span>);
<span class="keyword">else</span>
axisX<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="number">20.0</span>);
<span class="keyword">if</span> (axisY<span class="operator">-</span><span class="operator">></span>type() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qabstractaxis.html">QAbstractAxis</a></span><span class="operator">::</span>AxisTypeLogValue)
axisY<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0.1</span><span class="operator">,</span> <span class="number">10.0</span>);
<span class="keyword">else</span>
axisY<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="number">10.0</span>);
<span class="preprocessor">#ifdef ADD_SIMPLE_SERIES</span>
<span class="type"><a href="qlineseries.html">QLineSeries</a></span> <span class="operator">*</span>simpleRasterSeries <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineseries.html">QLineSeries</a></span>;
<span class="operator">*</span>simpleRasterSeries <span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">0.001</span><span class="operator">,</span> <span class="number">0.001</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">2.5</span><span class="operator">,</span> <span class="number">8.0</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">5.0</span><span class="operator">,</span> <span class="number">4.0</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">7.5</span><span class="operator">,</span> <span class="number">9.0</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">10.0</span><span class="operator">,</span> <span class="number">0.001</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">12.5</span><span class="operator">,</span> <span class="number">2.0</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">15.0</span><span class="operator">,</span> <span class="number">1.0</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">17.5</span><span class="operator">,</span> <span class="number">6.0</span>)
<span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">20.0</span><span class="operator">,</span> <span class="number">10.0</span>);
simpleRasterSeries<span class="operator">-</span><span class="operator">></span>setUseOpenGL(<span class="keyword">false</span>);
simpleRasterSeries<span class="operator">-</span><span class="operator">></span>setPen(<span class="type">QPen</span>(<span class="type">QBrush</span>(<span class="string">"magenta"</span>)<span class="operator">,</span> <span class="number">8</span>));
chart<span class="operator">-</span><span class="operator">></span>addSeries(simpleRasterSeries);
simpleRasterSeries<span class="operator">-</span><span class="operator">></span>attachAxis(axisX);
simpleRasterSeries<span class="operator">-</span><span class="operator">></span>attachAxis(axisY);
<span class="type"><a href="qlineseries.html">QLineSeries</a></span> <span class="operator">*</span>simpleGLSeries <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineseries.html">QLineSeries</a></span>;
simpleGLSeries<span class="operator">-</span><span class="operator">></span>setUseOpenGL(<span class="keyword">true</span>);
simpleGLSeries<span class="operator">-</span><span class="operator">></span>setPen(<span class="type">QPen</span>(<span class="type">QBrush</span>(<span class="string">"black"</span>)<span class="operator">,</span> <span class="number">2</span>));
simpleGLSeries<span class="operator">-</span><span class="operator">></span>replace(simpleRasterSeries<span class="operator">-</span><span class="operator">></span>points());
chart<span class="operator">-</span><span class="operator">></span>addSeries(simpleGLSeries);
simpleGLSeries<span class="operator">-</span><span class="operator">></span>attachAxis(axisX);
simpleGLSeries<span class="operator">-</span><span class="operator">></span>attachAxis(axisY);
<span class="preprocessor">#endif</span>
<span class="type"><a href="qchartview.html">QChartView</a></span> <span class="operator">*</span>chartView <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qchartview.html">QChartView</a></span>(chart);
<span class="type">QMainWindow</span> window;
window<span class="operator">.</span>setCentralWidget(chartView);
window<span class="operator">.</span>resize(<span class="number">600</span><span class="operator">,</span> <span class="number">400</span>);
window<span class="operator">.</span>show();
DataSource dataSource;
dataSource<span class="operator">.</span>generateData(seriesCount<span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> pointCount);
<span class="type">QLabel</span> <span class="operator">*</span>fpsLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QLabel</span>(<span class="operator">&</span>window);
<span class="type">QLabel</span> <span class="operator">*</span>countLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QLabel</span>(<span class="operator">&</span>window);
<span class="type">QString</span> countText <span class="operator">=</span> <span class="type">QStringLiteral</span>(<span class="string">"Total point count: %1"</span>);
countLabel<span class="operator">-</span><span class="operator">></span>setText(countText<span class="operator">.</span>arg(pointCount <span class="operator">*</span> seriesCount));
countLabel<span class="operator">-</span><span class="operator">></span>adjustSize();
fpsLabel<span class="operator">-</span><span class="operator">></span>move(<span class="number">10</span><span class="operator">,</span> <span class="number">2</span>);
fpsLabel<span class="operator">-</span><span class="operator">></span>adjustSize();
fpsLabel<span class="operator">-</span><span class="operator">></span>raise();
fpsLabel<span class="operator">-</span><span class="operator">></span>show();
countLabel<span class="operator">-</span><span class="operator">></span>move(<span class="number">10</span><span class="operator">,</span> fpsLabel<span class="operator">-</span><span class="operator">></span>height());
fpsLabel<span class="operator">-</span><span class="operator">></span>raise();
countLabel<span class="operator">-</span><span class="operator">></span>show();
<span class="comment">// We can get more than one changed event per frame, so do async update.</span>
<span class="comment">// This also allows the application to be responsive.</span>
<span class="type">QObject</span><span class="operator">::</span>connect(chart<span class="operator">-</span><span class="operator">></span>scene()<span class="operator">,</span> <span class="operator">&</span><span class="type">QGraphicsScene</span><span class="operator">::</span>changed<span class="operator">,</span>
<span class="operator">&</span>dataSource<span class="operator">,</span> <span class="operator">&</span>DataSource<span class="operator">::</span>handleSceneChanged);
dataSource<span class="operator">.</span>startUpdates(seriesList<span class="operator">,</span> fpsLabel);
<span class="keyword">return</span> a<span class="operator">.</span>exec();
}
</pre>
</div>
<!-- @@@openglseries/main.cpp -->
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