diff -r 000000000000 -r 1918ee327afb examples/tools/undoframework/diagramscene.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/tools/undoframework/diagramscene.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "diagramscene.h"
+#include "diagramitem.h"
+
+DiagramScene::DiagramScene(QObject *parent)
+    : QGraphicsScene(parent)
+{
+    movingItem = 0;
+}
+
+void DiagramScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    QPointF mousePos(event->buttonDownScenePos(Qt::LeftButton).x(),
+                     event->buttonDownScenePos(Qt::LeftButton).y());
+    movingItem = itemAt(mousePos.x(), mousePos.y());
+
+    if (movingItem != 0 && event->button() == Qt::LeftButton) {
+        oldPos = movingItem->pos();
+    }
+    
+    clearSelection();    
+    QGraphicsScene::mousePressEvent(event);
+}
+
+void DiagramScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (movingItem != 0 && event->button() == Qt::LeftButton) {
+        if (oldPos != movingItem->pos())
+            emit itemMoved(qgraphicsitem_cast<DiagramItem *>(movingItem),
+                           oldPos);
+        movingItem = 0;
+    }
+    QGraphicsScene::mouseReleaseEvent(event);
+}