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<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) 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
** 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
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** $QT_END_LICENSE$
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****************************************************************************/</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>
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<!-- @@@xmlpatterns/filetree/mainwindow.cpp -->
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