<?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>chart.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-dynamicspline-example.html">Dynamic Spline Example</a></td><td >chart.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">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> </div> <!-- @@@dynamicspline/chart.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>