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# mainwindow.cpp Example File
itemviews/simpledommodel/mainwindow.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #include <QDomDocument>
    #include <QFile>
    #include <QtGui>

    #include "dommodel.h"
    #include "mainwindow.h"

    MainWindow::MainWindow() : QMainWindow(), model(0)
    {
        fileMenu = menuBar()->addMenu(tr("&File"));
        fileMenu->addAction(tr("&Open..."), this, SLOT(openFile()),
                            QKeySequence(tr("Ctrl+O")));
        fileMenu->addAction(tr("E&xit"), this, SLOT(close()),
                            QKeySequence(tr("Ctrl+Q")));

        model = new DomModel(QDomDocument(), this);
        view = new QTreeView(this);
        view->setModel(model);

        setCentralWidget(view);
        setWindowTitle(tr("Simple DOM Model"));
    }

    void MainWindow::openFile()
    {
        QString filePath = QFileDialog::getOpenFileName(this, tr("Open File"),
            xmlPath, tr("XML files (*.xml);;HTML files (*.html);;"
                        "SVG files (*.svg);;User Interface files (*.ui)"));

        if (!filePath.isEmpty()) {
            QFile file(filePath);
            if (file.open(QIODevice::ReadOnly)) {
                QDomDocument document;
                if (document.setContent(&file)) {
                    DomModel *newModel = new DomModel(document, this);
                    view->setModel(newModel);
                    delete model;
                    model = newModel;
                    xmlPath = filePath;
                }
                file.close();
            }
        }
    }