<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>main.cpp Example File | Qt Charts 5.9</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.9</td><td ><a href="qtcharts-index.html">Qt Charts</a></td><td ><a href="qtcharts-openglseries-example.html">OpenGL Accelerated Series Example</a></td><td >main.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <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 --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>