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qt4-doc-4.6.3-0.2mdv2010.2.i586.rpm

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 #include &lt;QtGui&gt;
 #include &lt;QLibraryInfo&gt;
 #include &lt;QtXmlPatterns&gt;

 #include &quot;mainwindow.h&quot;
 #include &quot;xmlsyntaxhighlighter.h&quot;

 MainWindow::MainWindow() : m_fileTree(m_namePool)
 {
     setupUi(this);

     new XmlSyntaxHighlighter(fileTree-&gt;document());

     <span class="comment">// Set up the font.</span>
     {
         QFont font(&quot;Courier&quot;,10);
         font.setFixedPitch(true);

         fileTree-&gt;setFont(font);
         queryEdit-&gt;setFont(font);
         output-&gt;setFont(font);
     }

     const QString dir(QLibraryInfo::location(QLibraryInfo::ExamplesPath) + &quot;/xmlpatterns/filetree&quot;);
     qDebug() &lt;&lt; dir;

     if (QDir(dir).exists())
         loadDirectory(dir);
     else
         fileTree-&gt;setPlainText(tr(&quot;Use the Open menu entry to select a directory.&quot;));

     const QStringList queries(QDir(&quot;:/queries/&quot;, &quot;*.xq&quot;).entryList());
     int len = queries.count();

     for (int i = 0; i &lt; len; ++i)
         queryBox-&gt;addItem(queries.at(i));

 }

 void MainWindow::on_queryBox_currentIndexChanged()
 {
     QFile queryFile(&quot;:/queries/&quot; + queryBox-&gt;currentText());
     queryFile.open(QIODevice::ReadOnly);

     queryEdit-&gt;setPlainText(QString::fromLatin1(queryFile.readAll()));
     evaluateResult();
 }

 void MainWindow::evaluateResult()
 {
     if (queryBox-&gt;currentText().isEmpty())
         return;

     QXmlQuery query(m_namePool);
     query.bindVariable(&quot;fileTree&quot;, m_fileNode);
     query.setQuery(QUrl(&quot;qrc:/queries/&quot; + queryBox-&gt;currentText()));

     QByteArray formatterOutput;
     QBuffer buffer(&amp;formatterOutput);
     buffer.open(QIODevice::WriteOnly);

     QXmlFormatter formatter(query, &amp;buffer);
     query.evaluateTo(&amp;formatter);

     output-&gt;setText(QString::fromLatin1(formatterOutput.constData()));
 }

 void MainWindow::on_actionOpenDirectory_triggered()
 {
     const QString directoryName = QFileDialog::getExistingDirectory(this);
     if (!directoryName.isEmpty())
         loadDirectory(directoryName);
 }

 void MainWindow::loadDirectory(const QString &amp;directory)
 {
     Q_ASSERT(QDir(directory).exists());

     m_fileNode = m_fileTree.nodeFor(directory);

     QXmlQuery query(m_namePool);
     query.bindVariable(&quot;fileTree&quot;, m_fileNode);
     query.setQuery(QUrl(&quot;qrc:/queries/wholeTree.xq&quot;));

     QByteArray output;
     QBuffer buffer(&amp;output);
     buffer.open(QIODevice::WriteOnly);

     QXmlFormatter formatter(query, &amp;buffer);
     query.evaluateTo(&amp;formatter);

     treeInfo-&gt;setText((QString(tr(&quot;Model of %1 output as XML.&quot;)).arg(directory)));
     fileTree-&gt;setText(QString::fromLatin1(output.constData()));
     evaluateResult();
 }

 void MainWindow::on_actionAbout_triggered()
 {
     QMessageBox::about(this, tr(&quot;About File Tree&quot;),
                    tr(&quot;&lt;p&gt;Select &lt;b&gt;File-&gt;Open Directory&lt;/b&gt; and &quot;
                       &quot;choose a directory. The directory is then &quot;
                       &quot;loaded into the model, and the model is &quot;
                       &quot;displayed on the left as XML.&lt;/p&gt;&quot;

                       &quot;&lt;p&gt;From the query menu on the right, select &quot;
                       &quot;a query. The query is displayed and then run &quot;
                       &quot;on the model. The results are displayed below &quot;
                       &quot;the query.&lt;/p&gt;&quot;));
 }</pre>
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