Long live Qt!

12 files changed, 946 insertions, 0 deletions

diff --git a/examples/tools/undoframework/commands.cpp b/examples/tools/undoframework/commands.cpp
new file mode 100644
index 0000000..78f0c16
--- /dev/null
+++ b/examples/tools/undoframework/commands.cpp
@@ -0,0 +1,163 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 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 "commands.h"
+#include "diagramitem.h"
+
+//! [0]
+MoveCommand::MoveCommand(DiagramItem *diagramItem, const QPointF &oldPos,
+                 QUndoCommand *parent)
+    : QUndoCommand(parent)
+{
+    myDiagramItem = diagramItem;
+    newPos = diagramItem->pos();
+    myOldPos = oldPos;
+}
+//! [0]
+
+//! [1]
+bool MoveCommand::mergeWith(const QUndoCommand *command)
+{
+    const MoveCommand *moveCommand = static_cast<const MoveCommand *>(command);
+    DiagramItem *item = moveCommand->myDiagramItem;
+
+    if (myDiagramItem != item)
+    return false;
+
+    newPos = item->pos();
+    setText(QObject::tr("Move %1")
+        .arg(createCommandString(myDiagramItem, newPos)));
+
+    return true;
+}
+//! [1]
+
+//! [2]
+void MoveCommand::undo()
+{
+    myDiagramItem->setPos(myOldPos);
+    myDiagramItem->scene()->update();
+    setText(QObject::tr("Move %1")
+        .arg(createCommandString(myDiagramItem, newPos)));
+}
+//! [2]
+
+//! [3]
+void MoveCommand::redo()
+{
+    myDiagramItem->setPos(newPos);
+    setText(QObject::tr("Move %1")
+        .arg(createCommandString(myDiagramItem, newPos)));
+}
+//! [3]
+
+//! [4]
+DeleteCommand::DeleteCommand(QGraphicsScene *scene, QUndoCommand *parent)
+    : QUndoCommand(parent)
+{
+    myGraphicsScene = scene;
+    QList<QGraphicsItem *> list = myGraphicsScene->selectedItems();
+    list.first()->setSelected(false);
+    myDiagramItem = static_cast<DiagramItem *>(list.first());
+    setText(QObject::tr("Delete %1")
+        .arg(createCommandString(myDiagramItem, myDiagramItem->pos())));
+}
+//! [4]
+
+//! [5]
+void DeleteCommand::undo()
+{
+    myGraphicsScene->addItem(myDiagramItem);
+    myGraphicsScene->update();
+}
+//! [5]
+
+//! [6]
+void DeleteCommand::redo()
+{
+    myGraphicsScene->removeItem(myDiagramItem);
+}
+//! [6]
+
+//! [7]
+AddCommand::AddCommand(DiagramItem::DiagramType addType,
+                       QGraphicsScene *scene, QUndoCommand *parent)
+    : QUndoCommand(parent)
+{
+    static int itemCount = 0;
+
+    myGraphicsScene = scene;
+    myDiagramItem = new DiagramItem(addType);
+    initialPosition = QPointF((itemCount * 15) % int(scene->width()),
+                              (itemCount * 15) % int(scene->height()));
+    scene->update();
+    ++itemCount;
+    setText(QObject::tr("Add %1")
+        .arg(createCommandString(myDiagramItem, initialPosition)));
+}
+//! [7]
+
+//! [8]
+void AddCommand::undo()
+{
+    myGraphicsScene->removeItem(myDiagramItem);
+    myGraphicsScene->update();
+}
+//! [8]
+
+//! [9]
+void AddCommand::redo()
+{
+    myGraphicsScene->addItem(myDiagramItem);
+    myDiagramItem->setPos(initialPosition);
+    myGraphicsScene->clearSelection();
+    myGraphicsScene->update();
+}
+//! [9]
+
+QString createCommandString(DiagramItem *item, const QPointF &pos)
+{
+    return QObject::tr("%1 at (%2, %3)")
+        .arg(item->diagramType() == DiagramItem::Box ? "Box" : "Triangle")
+        .arg(pos.x()).arg(pos.y());
+}
diff --git a/examples/tools/undoframework/commands.h b/examples/tools/undoframework/commands.h
new file mode 100644
index 0000000..17e4f3c
--- /dev/null
+++ b/examples/tools/undoframework/commands.h
@@ -0,0 +1,104 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef COMMANDS_H
+#define COMMANDS_H
+
+#include <QUndoCommand>
+
+#include "diagramitem.h"
+
+//! [0]
+class MoveCommand : public QUndoCommand
+{
+public:
+    enum { Id = 1234 };
+
+    MoveCommand(DiagramItem *diagramItem, const QPointF &oldPos,
+                QUndoCommand *parent = 0);
+
+    void undo();
+    void redo();
+    bool mergeWith(const QUndoCommand *command);
+    int id() const { return Id; }
+
+private:
+    DiagramItem *myDiagramItem;
+    QPointF myOldPos;
+    QPointF newPos;
+};
+//! [0]
+
+//! [1]
+class DeleteCommand : public QUndoCommand
+{
+public:
+    DeleteCommand(QGraphicsScene *graphicsScene, QUndoCommand *parent = 0);
+
+    void undo();
+    void redo();
+
+private:
+    DiagramItem *myDiagramItem;
+    QGraphicsScene *myGraphicsScene;
+};
+//! [1]
+
+//! [2]
+class AddCommand : public QUndoCommand
+{
+public:
+    AddCommand(DiagramItem::DiagramType addType, QGraphicsScene *graphicsScene,
+               QUndoCommand *parent = 0);
+
+    void undo();
+    void redo();
+
+private:
+    DiagramItem *myDiagramItem;
+    QGraphicsScene *myGraphicsScene;
+    QPointF initialPosition;
+};
+//! [2]
+
+QString createCommandString(DiagramItem *item, const QPointF &point);
+
+#endif
diff --git a/examples/tools/undoframework/diagramitem.cpp b/examples/tools/undoframework/diagramitem.cpp
new file mode 100644
index 0000000..1b4301e
--- /dev/null
+++ b/examples/tools/undoframework/diagramitem.cpp
@@ -0,0 +1,66 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 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 "diagramitem.h"
+
+DiagramItem::DiagramItem(DiagramType diagramType, QGraphicsItem *item,
+                         QGraphicsScene *scene)
+    : QGraphicsPolygonItem(item, scene)
+{
+    if (diagramType == Box) {
+        boxPolygon << QPointF(0, 0) << QPointF(0, 30) << QPointF(30, 30)
+                   << QPointF(30, 0) << QPointF(0, 0);
+        setPolygon(boxPolygon);
+    } else {
+        trianglePolygon << QPointF(15, 0) << QPointF(30, 30) << QPointF(0, 30)
+                        << QPointF(15, 0);
+        setPolygon(trianglePolygon);
+    }
+
+    QColor color(static_cast<int>(qrand()) % 256,
+        static_cast<int>(qrand()) % 256, static_cast<int>(qrand()) % 256);
+    QBrush brush(color);
+    setBrush(brush);
+    setFlag(QGraphicsItem::ItemIsSelectable);
+    setFlag(QGraphicsItem::ItemIsMovable);
+}
diff --git a/examples/tools/undoframework/diagramitem.h b/examples/tools/undoframework/diagramitem.h
new file mode 100644
index 0000000..68da876
--- /dev/null
+++ b/examples/tools/undoframework/diagramitem.h
@@ -0,0 +1,73 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef DIAGRAMITEM_H
+#define DIAGRAMITEM_H
+
+#include <QGraphicsPolygonItem>
+
+QT_BEGIN_NAMESPACE
+class QGraphicsItem;
+class QGraphicsScene;
+class QGraphicsSceneMouseEvent;
+class QPointF;
+QT_END_NAMESPACE
+
+class DiagramItem : public QGraphicsPolygonItem
+{
+public:
+    enum { Type = UserType + 1 };
+    enum DiagramType { Box, Triangle };
+
+    DiagramItem(DiagramType diagramType, QGraphicsItem *item = 0,
+            QGraphicsScene *scene = 0);
+
+    DiagramType diagramType() const {
+        return polygon() == boxPolygon ? Box : Triangle;
+    }
+    int type() const { return Type; }
+
+private:
+    QPolygonF boxPolygon;
+    QPolygonF trianglePolygon;
+};
+
+#endif
diff --git a/examples/tools/undoframework/diagramscene.cpp b/examples/tools/undoframework/diagramscene.cpp
new file mode 100644
index 0000000..fcc63c9
--- /dev/null
+++ b/examples/tools/undoframework/diagramscene.cpp
@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 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 "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);
+}
diff --git a/examples/tools/undoframework/diagramscene.h b/examples/tools/undoframework/diagramscene.h
new file mode 100644
index 0000000..e1537cc
--- /dev/null
+++ b/examples/tools/undoframework/diagramscene.h
@@ -0,0 +1,75 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef DIAGRAMSCENE_H
+#define DIAGRAMSCENE_H
+
+#include <QObject>
+#include <QGraphicsScene>
+
+class DiagramItem;
+QT_BEGIN_NAMESPACE
+class QGraphicsSceneDragDropEvent;
+class QGraphicsViewItem;
+QT_END_NAMESPACE
+
+//! [0]
+class DiagramScene : public QGraphicsScene
+{
+    Q_OBJECT
+
+public:
+    DiagramScene(QObject *parent = 0);
+
+signals:
+    void itemMoved(DiagramItem *movedItem, const QPointF &movedFromPosition);
+
+protected:
+    void mousePressEvent(QGraphicsSceneMouseEvent *event);
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
+
+private:
+    QGraphicsItem *movingItem;
+    QPointF oldPos;
+};
+//! [0]
+
+#endif
diff --git a/examples/tools/undoframework/images/cross.png b/examples/tools/undoframework/images/cross.png
new file mode 100644
index 0000000..09e5e8c
--- /dev/null
+++ b/examples/tools/undoframework/images/cross.png
diff --git a/examples/tools/undoframework/main.cpp b/examples/tools/undoframework/main.cpp
new file mode 100644
index 0000000..170d292
--- /dev/null
+++ b/examples/tools/undoframework/main.cpp
@@ -0,0 +1,58 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 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"
+
+//! [0]
+int main(int argv, char *args[])
+{
+    Q_INIT_RESOURCE(undoframework);
+
+    QApplication app(argv, args);
+
+    MainWindow mainWindow;
+    mainWindow.show();
+
+    return app.exec();
+}
+//! [0]
diff --git a/examples/tools/undoframework/mainwindow.cpp b/examples/tools/undoframework/mainwindow.cpp
new file mode 100644
index 0000000..f912ff2
--- /dev/null
+++ b/examples/tools/undoframework/mainwindow.cpp
@@ -0,0 +1,209 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 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 "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->setShortcut(tr("Ctrl+Z"));
+
+    redoAction = undoStack->createRedoAction(this, tr("&Redo"));
+    QList<QKeySequence> redoShortcuts;
+    redoShortcuts << tr("Ctrl+Y") << tr("Shift+Ctrl+Z");
+    redoAction->setShortcuts(redoShortcuts);
+//! [5]
+
+    exitAction = new QAction(tr("E&xit"), this);
+    exitAction->setShortcut(tr("Ctrl+Q"));
+    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]
diff --git a/examples/tools/undoframework/mainwindow.h b/examples/tools/undoframework/mainwindow.h
new file mode 100644
index 0000000..5f08ffc
--- /dev/null
+++ b/examples/tools/undoframework/mainwindow.h
@@ -0,0 +1,100 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QToolBar;
+class QMenu;
+class QUndoStack;
+class QUndoView;
+QT_END_NAMESPACE
+class DiagramScene;
+class DiagramItem;
+
+//! [0]
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow();
+
+public slots:
+    void itemMoved(DiagramItem *movedDiagram, const QPointF &moveStartPosition);
+
+private slots:
+    void deleteItem();
+    void addBox();
+    void addTriangle();
+    void about();
+    void itemMenuAboutToShow();
+    void itemMenuAboutToHide();
+
+private:
+    void createActions();
+    void createMenus();
+    void createUndoView();
+
+    QAction *deleteAction;
+    QAction *addBoxAction;
+    QAction *addTriangleAction;
+    QAction *undoAction;
+    QAction *redoAction;
+    QAction *exitAction;
+    QAction *aboutAction;
+
+    QMenu *fileMenu;
+    QMenu *editMenu;
+    QMenu *itemMenu;
+    QMenu *helpMenu;
+
+    DiagramScene *diagramScene;
+    QUndoStack *undoStack;
+    QUndoView *undoView;
+};
+//! [0]
+
+#endif
diff --git a/examples/tools/undoframework/undoframework.pro b/examples/tools/undoframework/undoframework.pro
new file mode 100644
index 0000000..42010f5
--- /dev/null
+++ b/examples/tools/undoframework/undoframework.pro
@@ -0,0 +1,16 @@
+HEADERS	    = commands.h \
+	      diagramitem.h \
+	      diagramscene.h \
+	      mainwindow.h
+SOURCES	    = commands.cpp \
+              diagramitem.cpp \
+              diagramscene.cpp \
+              main.cpp \
+              mainwindow.cpp
+RESOURCES   = undoframework.qrc
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/tools/undoframework
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS undoframework.pro README images
+sources.path = $$[QT_INSTALL_EXAMPLES]/tools/undoframework
+INSTALLS += target sources
diff --git a/examples/tools/undoframework/undoframework.qrc b/examples/tools/undoframework/undoframework.qrc
new file mode 100644
index 0000000..6321d94
--- /dev/null
+++ b/examples/tools/undoframework/undoframework.qrc
@@ -0,0 +1,6 @@
+<!DOCTYPE RCC><RCC version="1.0">
+    <qresource>
+        <file>images/cross.png</file>
+    </qresource>
+    </RCC>
+