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#include <QtGui>

#include <QLibraryInfo>

#include <QtXmlPatterns>

#include "mainwindow.h"

#include "xmlsyntaxhighlighter.h"

//! [0]

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(queries.at(i));

}

//! [0]

//! [2]

void MainWindow::on_queryBox_currentIndexChanged()

{

    QFile queryFile(":/queries/" + queryBox->currentText());

    queryFile.open(QIODevice::ReadOnly);

    queryEdit->setPlainText(QString::fromLatin1(queryFile.readAll()));

    evaluateResult();

}

//! [2]

//! [3]

void MainWindow::evaluateResult()

{

    if (queryBox->currentText().isEmpty())

        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()));

}

//! [3]

//! [1]

void MainWindow::on_actionOpenDirectory_triggered()

{

    const QString directoryName = QFileDialog::getExistingDirectory(this);

    if (!directoryName.isEmpty())

        loadDirectory(directoryName);

}

//! [1]

//! [4]

//! [5]

void MainWindow::loadDirectory(const QString &directory)

{

    Q_ASSERT(QDir(directory).exists());

    m_fileNode = m_fileTree.nodeFor(directory);

//! [5]

    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((QString(tr("Model of %1 output as XML.")).arg(directory)));

    fileTree->setText(QString::fromLatin1(output.constData()));

    evaluateResult();

//! [6]    

}

//! [6]    

//! [4]

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>"));

}