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diff --git a/doc/src/snippets/qtreeview-dnd/mainwindow.cpp b/doc/src/snippets/qtreeview-dnd/mainwindow.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "mainwindow.h"
+#include "dragdropmodel.h"
+
+MainWindow::MainWindow()
+{
+    QMenu *fileMenu = new QMenu(tr("&File"));
+
+    QAction *quitAction = fileMenu->addAction(tr("E&xit"));
+    quitAction->setShortcut(tr("Ctrl+Q"));
+
+    menuBar()->addMenu(fileMenu);
+
+//  For convenient quoting:
+    QTreeView *treeView = new QTreeView(this);
+    treeView->setSelectionMode(QAbstractItemView::ExtendedSelection);
+    treeView->setDragEnabled(true);
+    treeView->setAcceptDrops(true);
+    treeView->setDropIndicatorShown(true);
+
+    this->treeView = treeView;
+
+    connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));
+
+    setupItems();
+
+    setCentralWidget(treeView);
+    setWindowTitle(tr("Tree View"));
+}
+
+void MainWindow::setupItems()
+{
+    QStringList items;
+    items << tr("Widgets\tUser interface objects used to create GUI applications.")
+          << tr("  QWidget\tThe basic building block for all other widgets.")
+          << tr("  QDialog\tThe base class for dialog windows.")
+          << tr("Tools\tUtilities and applications for Qt developers.")
+          << tr("  Qt Designer\tA GUI form designer for Qt applications.")
+          << tr("  Qt Assistant\tA documentation browser for Qt documentation.");
+
+    DragDropModel *model = new DragDropModel(items, this);
+    QModelIndex index = model->index(0, 0, QModelIndex());
+    model->insertRows(2, 3, index);
+    index = model->index(0, 0, QModelIndex());
+    index = model->index(2, 0, index);
+    model->setData(index, QVariant("QFrame"));
+    model->removeRows(3, 2, index.parent());
+    treeView->setModel(model);
+}