--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/tools/undoframework/mainwindow.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,207 @@
+/****************************************************************************
+**
+** 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 "mainwindow.h"
+#include "diagramscene.h"
+#include "diagramitem.h"
+#include "commands.h"
+
+//! [0]
+MainWindow::MainWindow()
+{
+    undoStack = new QUndoStack();
+
+    createActions();
+    createMenus();
+
+    createUndoView();
+
+    diagramScene = new DiagramScene();
+    QBrush pixmapBrush(QPixmap(":/images/cross.png").scaled(30, 30));
+    diagramScene->setBackgroundBrush(pixmapBrush);
+    diagramScene->setSceneRect(QRect(0, 0, 500, 500));
+
+    connect(diagramScene, SIGNAL(itemMoved(DiagramItem *, const QPointF &)),
+            this, SLOT(itemMoved(DiagramItem *, const QPointF &)));
+
+    setWindowTitle("Undo Framework");
+    QGraphicsView *view = new QGraphicsView(diagramScene);
+    setCentralWidget(view);
+    resize(700, 500);
+}
+//! [0]
+
+//! [1]
+void MainWindow::createUndoView()
+{
+    undoView = new QUndoView(undoStack);
+    undoView->setWindowTitle(tr("Command List"));
+    undoView->show();
+    undoView->setAttribute(Qt::WA_QuitOnClose, false);
+}
+//! [1]
+
+//! [2]
+void MainWindow::createActions()
+{
+    deleteAction = new QAction(tr("&Delete Item"), this);
+    deleteAction->setShortcut(tr("Del"));
+    connect(deleteAction, SIGNAL(triggered()), this, SLOT(deleteItem()));
+//! [2] //! [3]
+
+//! [3] //! [4]
+    addBoxAction = new QAction(tr("Add &Box"), this);
+//! [4]
+    addBoxAction->setShortcut(tr("Ctrl+O"));
+    connect(addBoxAction, SIGNAL(triggered()), this, SLOT(addBox()));
+
+    addTriangleAction = new QAction(tr("Add &Triangle"), this);
+    addTriangleAction->setShortcut(tr("Ctrl+T"));
+    connect(addTriangleAction, SIGNAL(triggered()), this, SLOT(addTriangle()));
+
+//! [5]
+    undoAction = undoStack->createUndoAction(this, tr("&Undo"));
+    undoAction->setShortcuts(QKeySequence::Undo);
+
+    redoAction = undoStack->createRedoAction(this, tr("&Redo"));
+    redoAction->setShortcuts(QKeySequence::Redo);
+//! [5]
+
+    exitAction = new QAction(tr("E&xit"), this);
+    exitAction->setShortcuts(QKeySequence::Quit);
+    connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));
+
+    aboutAction = new QAction(tr("&About"), this);
+    QList<QKeySequence> aboutShortcuts;
+    aboutShortcuts << tr("Ctrl+A") << tr("Ctrl+B");
+    aboutAction->setShortcuts(aboutShortcuts);
+    connect(aboutAction, SIGNAL(triggered()), this, SLOT(about()));
+}
+
+//! [6]
+void MainWindow::createMenus()
+{
+//! [6]
+    fileMenu = menuBar()->addMenu(tr("&File"));
+    fileMenu->addAction(exitAction);
+
+//! [7]
+    editMenu = menuBar()->addMenu(tr("&Edit"));
+    editMenu->addAction(undoAction);
+    editMenu->addAction(redoAction);
+    editMenu->addSeparator();
+    editMenu->addAction(deleteAction);
+    connect(editMenu, SIGNAL(aboutToShow()),
+            this, SLOT(itemMenuAboutToShow()));
+    connect(editMenu, SIGNAL(aboutToHide()),
+            this, SLOT(itemMenuAboutToHide()));
+
+//! [7]
+    itemMenu = menuBar()->addMenu(tr("&Item"));
+    itemMenu->addAction(addBoxAction);
+    itemMenu->addAction(addTriangleAction);
+
+    helpMenu = menuBar()->addMenu(tr("&About"));
+    helpMenu->addAction(aboutAction);
+//! [8]
+}
+//! [8]
+
+//! [9]
+void MainWindow::itemMoved(DiagramItem *movedItem,
+                           const QPointF &oldPosition)
+{
+    undoStack->push(new MoveCommand(movedItem, oldPosition));
+}
+//! [9]
+
+//! [10]
+void MainWindow::deleteItem()
+{
+    if (diagramScene->selectedItems().isEmpty())
+        return;
+
+    QUndoCommand *deleteCommand = new DeleteCommand(diagramScene);
+    undoStack->push(deleteCommand);
+}
+//! [10]
+
+//! [11]
+void MainWindow::itemMenuAboutToHide()
+{
+    deleteAction->setEnabled(true);
+}
+//! [11]
+
+//! [12]
+void MainWindow::itemMenuAboutToShow()
+{
+    deleteAction->setEnabled(!diagramScene->selectedItems().isEmpty());
+}
+//! [12]
+
+//! [13]
+void MainWindow::addBox()
+{
+    QUndoCommand *addCommand = new AddCommand(DiagramItem::Box, diagramScene);
+    undoStack->push(addCommand);
+}
+//! [13]
+
+//! [14]
+void MainWindow::addTriangle()
+{
+    QUndoCommand *addCommand = new AddCommand(DiagramItem::Triangle,
+                                              diagramScene);
+    undoStack->push(addCommand);
+}
+//! [14]
+
+//! [15]
+void MainWindow::about()
+{
+    QMessageBox::about(this, tr("About Undo"),
+                       tr("The <b>Undo</b> example demonstrates how to "
+                          "use Qt's undo framework."));
+}
+//! [15]