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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">mainwindow.cpp Example File</h1> <span class="small-subtitle">xmlpatterns/filetree/mainwindow.cpp</span> <!-- $$$xmlpatterns/filetree/mainwindow.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** You may use this file under the terms of the BSD license as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include <QtGui></span> <span class="preprocessor">#include <QLibraryInfo></span> <span class="preprocessor">#include <QtXmlPatterns></span> <span class="preprocessor">#include "mainwindow.h"</span> <span class="preprocessor">#include "xmlsyntaxhighlighter.h"</span> MainWindow<span class="operator">::</span>MainWindow() : m_fileTree(m_namePool) { setupUi(<span class="keyword">this</span>); <span class="keyword">new</span> XmlSyntaxHighlighter(fileTree<span class="operator">-</span><span class="operator">></span>document()); <span class="comment">// Set up the font.</span> { <span class="type"><a href="qfont.html">QFont</a></span> font(<span class="string">"Courier"</span><span class="operator">,</span><span class="number">10</span>); font<span class="operator">.</span>setFixedPitch(<span class="keyword">true</span>); fileTree<span class="operator">-</span><span class="operator">></span>setFont(font); queryEdit<span class="operator">-</span><span class="operator">></span>setFont(font); output<span class="operator">-</span><span class="operator">></span>setFont(font); } <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> dir(<span class="type"><a href="qlibraryinfo.html">QLibraryInfo</a></span><span class="operator">::</span>location(<span class="type"><a href="qlibraryinfo.html">QLibraryInfo</a></span><span class="operator">::</span>ExamplesPath) <span class="operator">+</span> <span class="string">"/xmlpatterns/filetree"</span>); <a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> dir; <span class="keyword">if</span> (<span class="type"><a href="qdir.html">QDir</a></span>(dir)<span class="operator">.</span>exists()) loadDirectory(dir); <span class="keyword">else</span> fileTree<span class="operator">-</span><span class="operator">></span>setPlainText(tr(<span class="string">"Use the Open menu entry to select a directory."</span>)); <span class="keyword">const</span> <span class="type"><a href="qstringlist.html">QStringList</a></span> queries(<span class="type"><a href="qdir.html">QDir</a></span>(<span class="string">":/queries/"</span><span class="operator">,</span> <span class="string">"*.xq"</span>)<span class="operator">.</span>entryList()); <span class="type">int</span> len <span class="operator">=</span> queries<span class="operator">.</span>count(); <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> len; <span class="operator">+</span><span class="operator">+</span>i) queryBox<span class="operator">-</span><span class="operator">></span>addItem(queries<span class="operator">.</span>at(i)); } <span class="type">void</span> MainWindow<span class="operator">::</span>on_queryBox_currentIndexChanged() { <span class="type"><a href="qfile.html">QFile</a></span> queryFile(<span class="string">":/queries/"</span> <span class="operator">+</span> queryBox<span class="operator">-</span><span class="operator">></span>currentText()); queryFile<span class="operator">.</span>open(<span class="type"><a href="qiodevice.html">QIODevice</a></span><span class="operator">::</span>ReadOnly); queryEdit<span class="operator">-</span><span class="operator">></span>setPlainText(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>fromLatin1(queryFile<span class="operator">.</span>readAll())); evaluateResult(); } <span class="type">void</span> MainWindow<span class="operator">::</span>evaluateResult() { <span class="keyword">if</span> (queryBox<span class="operator">-</span><span class="operator">></span>currentText()<span class="operator">.</span>isEmpty()) <span class="keyword">return</span>; <span class="type"><a href="qxmlquery.html">QXmlQuery</a></span> query(m_namePool); query<span class="operator">.</span>bindVariable(<span class="string">"fileTree"</span><span class="operator">,</span> m_fileNode); query<span class="operator">.</span>setQuery(<span class="type"><a href="qurl.html">QUrl</a></span>(<span class="string">"qrc:/queries/"</span> <span class="operator">+</span> queryBox<span class="operator">-</span><span class="operator">></span>currentText())); <span class="type"><a href="qbytearray.html">QByteArray</a></span> formatterOutput; <span class="type"><a href="qbuffer.html">QBuffer</a></span> buffer(<span class="operator">&</span>formatterOutput); buffer<span class="operator">.</span>open(<span class="type"><a href="qiodevice.html">QIODevice</a></span><span class="operator">::</span>WriteOnly); <span class="type"><a href="qxmlformatter.html">QXmlFormatter</a></span> formatter(query<span class="operator">,</span> <span class="operator">&</span>buffer); query<span class="operator">.</span>evaluateTo(<span class="operator">&</span>formatter); output<span class="operator">-</span><span class="operator">></span>setText(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>fromLatin1(formatterOutput<span class="operator">.</span>constData())); } <span class="type">void</span> MainWindow<span class="operator">::</span>on_actionOpenDirectory_triggered() { <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> directoryName <span class="operator">=</span> <span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getExistingDirectory(<span class="keyword">this</span>); <span class="keyword">if</span> (<span class="operator">!</span>directoryName<span class="operator">.</span>isEmpty()) loadDirectory(directoryName); } <span class="type">void</span> MainWindow<span class="operator">::</span>loadDirectory(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>directory) { Q_ASSERT(<span class="type"><a href="qdir.html">QDir</a></span>(directory)<span class="operator">.</span>exists()); m_fileNode <span class="operator">=</span> m_fileTree<span class="operator">.</span>nodeFor(directory); <span class="type"><a href="qxmlquery.html">QXmlQuery</a></span> query(m_namePool); query<span class="operator">.</span>bindVariable(<span class="string">"fileTree"</span><span class="operator">,</span> m_fileNode); query<span class="operator">.</span>setQuery(<span class="type"><a href="qurl.html">QUrl</a></span>(<span class="string">"qrc:/queries/wholeTree.xq"</span>)); <span class="type"><a href="qbytearray.html">QByteArray</a></span> output; <span class="type"><a href="qbuffer.html">QBuffer</a></span> buffer(<span class="operator">&</span>output); buffer<span class="operator">.</span>open(<span class="type"><a href="qiodevice.html">QIODevice</a></span><span class="operator">::</span>WriteOnly); <span class="type"><a href="qxmlformatter.html">QXmlFormatter</a></span> formatter(query<span class="operator">,</span> <span class="operator">&</span>buffer); query<span class="operator">.</span>evaluateTo(<span class="operator">&</span>formatter); treeInfo<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Model of %1 output as XML."</span>)<span class="operator">.</span>arg(directory)); fileTree<span class="operator">-</span><span class="operator">></span>setText(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>fromLatin1(output<span class="operator">.</span>constData())); evaluateResult(); } <span class="type">void</span> MainWindow<span class="operator">::</span>on_actionAbout_triggered() { <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>about(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"About File Tree"</span>)<span class="operator">,</span> tr(<span class="string">"<p>Select <b>File->Open Directory</b> and "</span> <span class="string">"choose a directory. The directory is then "</span> <span class="string">"loaded into the model, and the model is "</span> <span class="string">"displayed on the left as XML.</p>"</span> <span class="string">"<p>From the query menu on the right, select "</span> <span class="string">"a query. The query is displayed and then run "</span> <span class="string">"on the model. The results are displayed below "</span> <span class="string">"the query.</p>"</span>)); }</pre> </div> <!-- @@@xmlpatterns/filetree/mainwindow.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. 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