/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the examples of the Qt Toolkit.

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include <QtGui>

#include <QtXmlPatterns>

#include "mainwindow.h"

#include "qobjectxmlmodel.h"

#include "xmlsyntaxhighlighter.h"

MainWindow::MainWindow()

{

    setupUi(this);

    new XmlSyntaxHighlighter(wholeTreeOutput->document());

    /* Setup the font. */

    {

        QFont font("Courier");

        font.setFixedPitch(true);

        wholeTree->setFont(font);

        wholeTreeOutput->setFont(font);

        htmlQueryEdit->setFont(font);

    }

    QXmlNamePool namePool;

    QObjectXmlModel qObjectModel(this, namePool);

    QXmlQuery query(namePool);

    /* The QObject tree as XML view. */

    {

        query.bindVariable("root", qObjectModel.root());

        query.setQuery(QUrl("qrc:/queries/wholeTree.xq"));

        Q_ASSERT(query.isValid());

        QByteArray output;

        QBuffer buffer(&output);

        buffer.open(QIODevice::WriteOnly);

        /* Let's the use the formatter, so it's a bit easier to read. */

        QXmlFormatter serializer(query, &buffer);

        query.evaluateTo(&serializer);

        buffer.close();

        {

            QFile queryFile(":/queries/wholeTree.xq");

            queryFile.open(QIODevice::ReadOnly);

            wholeTree->setPlainText(QString::fromUtf8(queryFile.readAll()));

            wholeTreeOutput->setPlainText(QString::fromUtf8(output.constData()));

        }

    }

    /* The QObject occurrence statistics as HTML view. */

    {

        query.setQuery(QUrl("qrc:/queries/statisticsInHTML.xq"));

        Q_ASSERT(query.isValid());

        QByteArray output;

        QBuffer buffer(&output);

        buffer.open(QIODevice::WriteOnly);

        /* Let's the use the serializer, so we gain a bit of speed. */

        QXmlSerializer serializer(query, &buffer);

        query.evaluateTo(&serializer);

        buffer.close();

        {

            QFile queryFile(":/queries/statisticsInHTML.xq");

            queryFile.open(QIODevice::ReadOnly);

            htmlQueryEdit->setPlainText(QString::fromUtf8(queryFile.readAll()));

            htmlOutput->setHtml(QString(output));

        }

    }

}

void MainWindow::on_actionAbout_triggered()

{

    QMessageBox::about(this,

                       tr("About QObject XML Model"),

                       tr("<p>The <b>QObject XML Model</b> example shows "

                          "how to use XQuery on top of data of your choice "

                          "without converting it to an XML document.</p>"

                          "<p>In this example a QSimpleXmlNodeModel subclass "

                          "makes it possible to query a QObject tree using "

                          "XQuery and retrieve the result as pointers to "

                          "QObjects, or as XML.</p>"

                          "<p>A possible use case of this could be to write "

                          "an application that tests a graphical interface "

                          "against Human Interface Guidelines, or that "

                          "queries an application's data which is modeled "

                          "using a QObject tree and dynamic properties."));

}