examples/xmlpatterns/filetree/mainwindow.cpp

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  40
  41 #include <QFileDialog>
  42 #include <QMessageBox>
  43 #include <QLibraryInfo>
  44 #include <QtXmlPatterns>
  45
  46 #include "mainwindow.h"
  47 #include "xmlsyntaxhighlighter.h"
  48
  49 //! [0]
  50 MainWindow::MainWindow() : m_fileTree(m_namePool)
  51 {
  52     setupUi(this);
  53
  54     new XmlSyntaxHighlighter(fileTree->document());
  55
  56     // Set up the font.
  57     {
  58         QFont font("Courier",10);
  59         font.setFixedPitch(true);
  60
  61         fileTree->setFont(font);
  62         queryEdit->setFont(font);
  63         output->setFont(font);
  64     }
  65
  66     const QString dir(QLibraryInfo::location(QLibraryInfo::ExamplesPath) + "/xmlpatterns/filetree");
  67     qDebug() << dir;
  68
  69     if (QDir(dir).exists())
  70         loadDirectory(dir);
  71     else
  72         fileTree->setPlainText(tr("Use the Open menu entry to select a directory."));
  73
  74     const QStringList queries(QDir(":/queries/", "*.xq").entryList());
  75     int len = queries.count();
  76
  77     for (int i = 0; i < len; ++i)
  78         queryBox->addItem(queries.at(i));
  79
  80 }
  81 //! [0]
  82
  83 //! [2]
  84 void MainWindow::on_queryBox_currentIndexChanged()
  85 {
  86     QFile queryFile(":/queries/" + queryBox->currentText());
  87     queryFile.open(QIODevice::ReadOnly);
  88
  89     queryEdit->setPlainText(QString::fromLatin1(queryFile.readAll()));
  90     evaluateResult();
  91 }
  92 //! [2]
  93
  94 //! [3]
  95 void MainWindow::evaluateResult()
  96 {
  97     if (queryBox->currentText().isEmpty())
  98         return;
  99
 100     QXmlQuery query(m_namePool);
 101     query.bindVariable("fileTree", m_fileNode);
 102     query.setQuery(QUrl("qrc:/queries/" + queryBox->currentText()));
 103
 104     QByteArray formatterOutput;
 105     QBuffer buffer(&formatterOutput);
 106     buffer.open(QIODevice::WriteOnly);
 107
 108     QXmlFormatter formatter(query, &buffer);
 109     query.evaluateTo(&formatter);
 110
 111     output->setText(QString::fromLatin1(formatterOutput.constData()));
 112 }
 113 //! [3]
 114
 115 //! [1]
 116 void MainWindow::on_actionOpenDirectory_triggered()
 117 {
 118     const QString directoryName = QFileDialog::getExistingDirectory(this);
 119     if (!directoryName.isEmpty())
 120         loadDirectory(directoryName);
 121 }
 122 //! [1]
 123
 124 //! [4]
 125 //! [5]
 126 void MainWindow::loadDirectory(const QString &directory)
 127 {
 128     Q_ASSERT(QDir(directory).exists());
 129
 130     m_fileNode = m_fileTree.nodeFor(directory);
 131 //! [5]
 132
 133     QXmlQuery query(m_namePool);
 134     query.bindVariable("fileTree", m_fileNode);
 135     query.setQuery(QUrl("qrc:/queries/wholeTree.xq"));
 136
 137     QByteArray output;
 138     QBuffer buffer(&output);
 139     buffer.open(QIODevice::WriteOnly);
 140
 141     QXmlFormatter formatter(query, &buffer);
 142     query.evaluateTo(&formatter);
 143
 144     treeInfo->setText(tr("Model of %1 output as XML.").arg(directory));
 145     fileTree->setText(QString::fromLatin1(output.constData()));
 146     evaluateResult();
 147 //! [6]
 148 }
 149 //! [6]
 150 //! [4]
 151
 152 void MainWindow::on_actionAbout_triggered()
 153 {
 154     QMessageBox::about(this, tr("About File Tree"),
 155                    tr("<p>Select <b>File->Open Directory</b> and "
 156                       "choose a directory. The directory is then "
 157                       "loaded into the model, and the model is "
 158                       "displayed on the left as XML.</p>"
 159
 160                       "<p>From the query menu on the right, select "
 161                       "a query. The query is displayed and then run "
 162                       "on the model. The results are displayed below "
 163                       "the query.</p>"));
 164 }
 165
 166