<?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>mainwindow.cpp Example File | Qt XML Patterns 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="qtxmlpatterns-index.html">Qt XML Patterns</a></td><td ><a href="qtxmlpatterns-filetree-example.html">File System Example</a></td><td >mainwindow.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">mainwindow.cpp Example File</h1> <span class="subtitle">filetree/mainwindow.cpp</span> <!-- $$$filetree/mainwindow.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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. ** ** BSD License Usage ** Alternatively, 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 <QFileDialog></span> <span class="preprocessor">#include <QMessageBox></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">QFont</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">QString</span> dir(<span class="type">QLibraryInfo</span><span class="operator">::</span>location(<span class="type">QLibraryInfo</span><span class="operator">::</span>ExamplesPath) <span class="operator">+</span> <span class="string">"/xmlpatterns/filetree"</span>); qDebug() <span class="operator"><</span><span class="operator"><</span> dir; <span class="keyword">if</span> (<span class="type">QDir</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">QStringList</span> queries(<span class="type">QDir</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="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>currentText) { <span class="type">QFile</span> queryFile(<span class="string">":/queries/"</span> <span class="operator">+</span> currentText); queryFile<span class="operator">.</span>open(<span class="type">QIODevice</span><span class="operator">::</span>ReadOnly); queryEdit<span class="operator">-</span><span class="operator">></span>setPlainText(<span class="type">QString</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="operator">|</span><span class="operator">|</span> m_fileNode<span class="operator">.</span>isNull()) <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">QUrl</span>(<span class="string">"qrc:/queries/"</span> <span class="operator">+</span> queryBox<span class="operator">-</span><span class="operator">></span>currentText())); <span class="type">QByteArray</span> formatterOutput; <span class="type">QBuffer</span> buffer(<span class="operator">&</span>formatterOutput); buffer<span class="operator">.</span>open(<span class="type">QIODevice</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">QString</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">QString</span> directoryName <span class="operator">=</span> <span class="type">QFileDialog</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">QString</span> <span class="operator">&</span>directory) { Q_ASSERT(<span class="type">QDir</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">QUrl</span>(<span class="string">"qrc:/queries/wholeTree.xq"</span>)); <span class="type">QByteArray</span> output; <span class="type">QBuffer</span> buffer(<span class="operator">&</span>output); buffer<span class="operator">.</span>open(<span class="type">QIODevice</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">QString</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">QMessageBox</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> <!-- @@@filetree/mainwindow.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>