<?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>querymainwindow.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-recipes-example.html">Recipes Example</a></td><td >querymainwindow.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">querymainwindow.cpp Example File</h1> <span class="subtitle">recipes/querymainwindow.cpp</span> <!-- $$$recipes/querymainwindow.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 <QMessageBox></span> <span class="preprocessor">#include <QFileDialog></span> <span class="preprocessor">#include <QtXmlPatterns></span> <span class="preprocessor">#include "querymainwindow.h"</span> <span class="preprocessor">#include "xmlsyntaxhighlighter.h"</span> QueryMainWindow<span class="operator">::</span>QueryMainWindow() : ui_defaultQueries(<span class="number">0</span>) { setupUi(<span class="keyword">this</span>); <span class="keyword">new</span> XmlSyntaxHighlighter(findChild<span class="operator"><</span><span class="type">QTextEdit</span><span class="operator">*</span><span class="operator">></span>(<span class="string">"inputTextEdit"</span>)<span class="operator">-</span><span class="operator">></span>document()); <span class="keyword">new</span> XmlSyntaxHighlighter(findChild<span class="operator"><</span><span class="type">QTextEdit</span><span class="operator">*</span><span class="operator">></span>(<span class="string">"outputTextEdit"</span>)<span class="operator">-</span><span class="operator">></span>document()); ui_defaultQueries <span class="operator">=</span> findChild<span class="operator"><</span><span class="type">QComboBox</span><span class="operator">*</span><span class="operator">></span>(<span class="string">"defaultQueries"</span>); <span class="type">QMetaObject</span><span class="operator">::</span>connectSlotsByName(<span class="keyword">this</span>); connect(ui_defaultQueries<span class="operator">,</span> SIGNAL(currentIndexChanged(<span class="type">int</span>))<span class="operator">,</span> SLOT(displayQuery(<span class="type">int</span>))); loadInputFile(); <span class="keyword">const</span> <span class="type">QStringList</span> queries(<span class="type">QDir</span>(<span class="string">":/files/"</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) ui_defaultQueries<span class="operator">-</span><span class="operator">></span>addItem(queries<span class="operator">.</span>at(i)); <span class="keyword">if</span> (len <span class="operator">></span> <span class="number">0</span>) displayQuery(<span class="number">0</span>); } <span class="type">void</span> QueryMainWindow<span class="operator">::</span>displayQuery(<span class="type">int</span> index) { <span class="type">QFile</span> queryFile(<span class="type">QString</span>(<span class="string">":files/"</span>) <span class="operator">+</span> ui_defaultQueries<span class="operator">-</span><span class="operator">></span>itemText(index)); queryFile<span class="operator">.</span>open(<span class="type">QIODevice</span><span class="operator">::</span>ReadOnly); <span class="keyword">const</span> <span class="type">QString</span> query(<span class="type">QString</span><span class="operator">::</span>fromLatin1(queryFile<span class="operator">.</span>readAll())); findChild<span class="operator"><</span><span class="type">QTextEdit</span><span class="operator">*</span><span class="operator">></span>(<span class="string">"queryTextEdit"</span>)<span class="operator">-</span><span class="operator">></span>setPlainText(query); evaluate(query); } <span class="type">void</span> QueryMainWindow<span class="operator">::</span>loadInputFile() { <span class="type">QFile</span> forView; forView<span class="operator">.</span>setFileName(<span class="string">":/files/cookbook.xml"</span>); <span class="keyword">if</span> (<span class="operator">!</span>forView<span class="operator">.</span>open(<span class="type">QIODevice</span><span class="operator">::</span>ReadOnly)) { <span class="type">QMessageBox</span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Unable to open file"</span>)<span class="operator">,</span> forView<span class="operator">.</span>errorString()); <span class="keyword">return</span>; } <span class="type">QTextStream</span> in(<span class="operator">&</span>forView); <span class="type">QString</span> inputDocument <span class="operator">=</span> in<span class="operator">.</span>readAll(); findChild<span class="operator"><</span><span class="type">QTextEdit</span><span class="operator">*</span><span class="operator">></span>(<span class="string">"inputTextEdit"</span>)<span class="operator">-</span><span class="operator">></span>setPlainText(inputDocument); } <span class="type">void</span> QueryMainWindow<span class="operator">::</span>evaluate(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>str) { <span class="type">QFile</span> sourceDocument; sourceDocument<span class="operator">.</span>setFileName(<span class="string">":/files/cookbook.xml"</span>); sourceDocument<span class="operator">.</span>open(<span class="type">QIODevice</span><span class="operator">::</span>ReadOnly); <span class="type">QByteArray</span> outArray; <span class="type">QBuffer</span> buffer(<span class="operator">&</span>outArray); buffer<span class="operator">.</span>open(<span class="type">QIODevice</span><span class="operator">::</span>ReadWrite); <span class="type"><a href="qxmlquery.html">QXmlQuery</a></span> query; query<span class="operator">.</span>bindVariable(<span class="string">"inputDocument"</span><span class="operator">,</span> <span class="operator">&</span>sourceDocument); query<span class="operator">.</span>setQuery(str); <span class="keyword">if</span> (<span class="operator">!</span>query<span class="operator">.</span>isValid()) <span class="keyword">return</span>; <span class="type"><a href="qxmlformatter.html">QXmlFormatter</a></span> formatter(query<span class="operator">,</span> <span class="operator">&</span>buffer); <span class="keyword">if</span> (<span class="operator">!</span>query<span class="operator">.</span>evaluateTo(<span class="operator">&</span>formatter)) <span class="keyword">return</span>; buffer<span class="operator">.</span>close(); findChild<span class="operator"><</span><span class="type">QTextEdit</span><span class="operator">*</span><span class="operator">></span>(<span class="string">"outputTextEdit"</span>)<span class="operator">-</span><span class="operator">></span>setPlainText(<span class="type">QString</span><span class="operator">::</span>fromUtf8(outArray<span class="operator">.</span>constData())); } </pre> </div> <!-- @@@recipes/querymainwindow.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>