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<h1 class="title">querymainwindow.cpp Example File</h1>
<span class="small-subtitle">xmlpatterns/recipes/querymainwindow.cpp</span>
<!-- $$$xmlpatterns/recipes/querymainwindow.cpp-description -->
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<pre class="cpp"><span class="comment">/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc and its Subsidiary(-ies) 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
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** $QT_END_LICENSE$
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****************************************************************************/</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>
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<!-- @@@xmlpatterns/recipes/querymainwindow.cpp -->
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