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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.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License version 2.0 as published by the Free Software Foundation
     ** and appearing in the file LICENSE.GPL included in the packaging of
     ** this file.  Please review the following information to ensure GNU
     ** General Public Licensing requirements will be met:
     ** http://www.trolltech.com/products/qt/opensource.html
     **
     ** If you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://www.trolltech.com/products/qt/licensing.html or contact the
     ** sales department at sales@trolltech.com.
     **
     ** 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();
             }
         }
     }