mainwindow.cpp Example File
filetree/mainwindow.cpp
#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());
{
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(queries.at(i));
}
void MainWindow::on_queryBox_currentIndexChanged(const QString ¤tText)
{
QFile queryFile(":/queries/" + currentText);
queryFile.open(QIODevice::ReadOnly);
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);
buffer.open(QIODevice::WriteOnly);
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);
buffer.open(QIODevice::WriteOnly);
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>"));
}