<?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>boxdatareader.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-boxplotchart-example.html">Box and Whiskers Example</a></td><td >boxdatareader.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">boxdatareader.cpp Example File</h1> <span class="subtitle">boxplotchart/boxdatareader.cpp</span> <!-- $$$boxplotchart/boxdatareader.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 "boxdatareader.h"</span> BoxDataReader<span class="operator">::</span>BoxDataReader(<span class="type">QIODevice</span> <span class="operator">*</span>device) : <span class="type">QTextStream</span>(device) { } <span class="type">void</span> BoxDataReader<span class="operator">::</span>readFile(<span class="type">QIODevice</span> <span class="operator">*</span>device) { <span class="type">QTextStream</span><span class="operator">::</span>setDevice(device); } <span class="type"><a href="qboxset.html">QBoxSet</a></span> <span class="operator">*</span>BoxDataReader<span class="operator">::</span>readBox() { <span class="type">QString</span> line <span class="operator">=</span> readLine(); <span class="keyword">if</span> (line<span class="operator">.</span>startsWith(<span class="string">"#"</span>)) <span class="keyword">return</span> <span class="number">0</span>; <span class="type">QStringList</span> strList <span class="operator">=</span> line<span class="operator">.</span>split(<span class="string">" "</span><span class="operator">,</span> <span class="type">QString</span><span class="operator">::</span>SkipEmptyParts); sortedList<span class="operator">.</span>clear(); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">1</span>; i <span class="operator"><</span> strList<span class="operator">.</span>count(); i<span class="operator">+</span><span class="operator">+</span>) sortedList<span class="operator">.</span>append(strList<span class="operator">.</span>at(i)<span class="operator">.</span>toDouble()); qSort(sortedList<span class="operator">.</span>begin()<span class="operator">,</span> sortedList<span class="operator">.</span>end()); <span class="type">int</span> count <span class="operator">=</span> sortedList<span class="operator">.</span>count(); <span class="type"><a href="qboxset.html">QBoxSet</a></span> <span class="operator">*</span>box <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qboxset.html">QBoxSet</a></span>(strList<span class="operator">.</span>first()); box<span class="operator">-</span><span class="operator">></span>setValue(<span class="type"><a href="qboxset.html">QBoxSet</a></span><span class="operator">::</span>LowerExtreme<span class="operator">,</span> sortedList<span class="operator">.</span>first()); box<span class="operator">-</span><span class="operator">></span>setValue(<span class="type"><a href="qboxset.html">QBoxSet</a></span><span class="operator">::</span>UpperExtreme<span class="operator">,</span> sortedList<span class="operator">.</span>last()); box<span class="operator">-</span><span class="operator">></span>setValue(<span class="type"><a href="qboxset.html">QBoxSet</a></span><span class="operator">::</span>Median<span class="operator">,</span> findMedian(<span class="number">0</span><span class="operator">,</span> count)); box<span class="operator">-</span><span class="operator">></span>setValue(<span class="type"><a href="qboxset.html">QBoxSet</a></span><span class="operator">::</span>LowerQuartile<span class="operator">,</span> findMedian(<span class="number">0</span><span class="operator">,</span> count <span class="operator">/</span> <span class="number">2</span>)); box<span class="operator">-</span><span class="operator">></span>setValue(<span class="type"><a href="qboxset.html">QBoxSet</a></span><span class="operator">::</span>UpperQuartile<span class="operator">,</span> findMedian(count <span class="operator">/</span> <span class="number">2</span> <span class="operator">+</span> (count <span class="operator">%</span> <span class="number">2</span>)<span class="operator">,</span> count)); <span class="keyword">return</span> box; } <span class="type">qreal</span> BoxDataReader<span class="operator">::</span>findMedian(<span class="type">int</span> begin<span class="operator">,</span> <span class="type">int</span> end) { <span class="type">int</span> count <span class="operator">=</span> end <span class="operator">-</span> begin; <span class="keyword">if</span> (count <span class="operator">%</span> <span class="number">2</span>) { <span class="keyword">return</span> sortedList<span class="operator">.</span>at(count <span class="operator">/</span> <span class="number">2</span> <span class="operator">+</span> begin); } <span class="keyword">else</span> { <span class="type">qreal</span> right <span class="operator">=</span> sortedList<span class="operator">.</span>at(count <span class="operator">/</span> <span class="number">2</span> <span class="operator">+</span> begin); <span class="type">qreal</span> left <span class="operator">=</span> sortedList<span class="operator">.</span>at(count <span class="operator">/</span> <span class="number">2</span> <span class="operator">-</span> <span class="number">1</span> <span class="operator">+</span> begin); <span class="keyword">return</span> (right <span class="operator">+</span> left) <span class="operator">/</span> <span class="number">2.0</span>; } } </pre> </div> <!-- @@@boxplotchart/boxdatareader.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>