mainwindow.cpp Example File

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#include <QFileDialog> #include <QMessageBox> #include <QLibraryInfo> #include <QtXmlPatterns> #include "mainwindow.h" #include "xmlsyntaxhighlighter.h" MainWindow::MainWindow() : m_fileTree(m_namePool) { setupUi(this); new XmlSyntaxHighlighter(fileTree->document()); // Set up the font. { QFont font("Courier",10); font.setFixedPitch(true); fileTree->setFont(font); queryEdit->setFont(font); output->setFont(font); } const QString dir(QLibraryInfo::location(QLibraryInfo::ExamplesPath) + "/xmlpatterns/filetree"); qDebug() << dir; if (QDir(dir).exists()) loadDirectory(dir); else fileTree->setPlainText(tr("Use the Open menu entry to select a directory.")); const QStringList queries(QDir(":/queries/", "*.xq").entryList()); int len = queries.count(); for (int i = 0; i < len; ++i) queryBox->addItem(; } void MainWindow::on_queryBox_currentIndexChanged(const QString &currentText) { QFile queryFile(":/queries/" + currentText);; queryEdit->setPlainText(QString::fromLatin1(queryFile.readAll())); evaluateResult(); } void MainWindow::evaluateResult() { if (queryBox->currentText().isEmpty() || m_fileNode.isNull()) return; QXmlQuery query(m_namePool); query.bindVariable("fileTree", m_fileNode); query.setQuery(QUrl("qrc:/queries/" + queryBox->currentText())); QByteArray formatterOutput; QBuffer buffer(&formatterOutput);; QXmlFormatter formatter(query, &buffer); query.evaluateTo(&formatter); output->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 &directory) { Q_ASSERT(QDir(directory).exists()); m_fileNode = m_fileTree.nodeFor(directory); QXmlQuery query(m_namePool); query.bindVariable("fileTree", m_fileNode); query.setQuery(QUrl("qrc:/queries/wholeTree.xq")); QByteArray output; QBuffer buffer(&output);; QXmlFormatter formatter(query, &buffer); query.evaluateTo(&formatter); treeInfo->setText(tr("Model of %1 output as XML.").arg(directory)); fileTree->setText(QString::fromLatin1(output.constData())); evaluateResult(); } void MainWindow::on_actionAbout_triggered() { QMessageBox::about(this, tr("About File Tree"), tr("<p>Select <b>File->Open Directory</b> and " "choose a directory. The directory is then " "loaded into the model, and the model is " "displayed on the left as XML.</p>" "<p>From the query menu on the right, select " "a query. The query is displayed and then run " "on the model. The results are displayed below " "the query.</p>")); }

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