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<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>
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<!-- @@@boxplotchart/boxdatareader.cpp -->
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distrib
>
Mageia
>
6
>
x86_64
>
media
>
core-updates
>
by-pkgid
>
19952c5e751bf7e3108c3c59625b0f35
>
files
>
276
