--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/util/qundostack.h	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,158 @@
+/****************************************************************************
+**
+** 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 QtGui module 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QUNDOSTACK_H
+#define QUNDOSTACK_H
+
+#include <QtCore/qobject.h>
+#include <QtCore/qstring.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+class QAction;
+class QUndoCommandPrivate;
+class QUndoStackPrivate;
+
+#ifndef QT_NO_UNDOCOMMAND
+
+class Q_GUI_EXPORT QUndoCommand
+{
+    QUndoCommandPrivate *d;
+
+public:
+    explicit QUndoCommand(QUndoCommand *parent = 0);
+    explicit QUndoCommand(const QString &text, QUndoCommand *parent = 0);
+    virtual ~QUndoCommand();
+
+    virtual void undo();
+    virtual void redo();
+
+    QString text() const;
+    void setText(const QString &text);
+
+    virtual int id() const;
+    virtual bool mergeWith(const QUndoCommand *other);
+
+    int childCount() const;
+    const QUndoCommand *child(int index) const;
+
+private:
+    Q_DISABLE_COPY(QUndoCommand)
+    friend class QUndoStack;
+};
+
+#endif // QT_NO_UNDOCOMMAND
+
+#ifndef QT_NO_UNDOSTACK
+
+class Q_GUI_EXPORT QUndoStack : public QObject
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QUndoStack)
+    Q_PROPERTY(bool active READ isActive WRITE setActive)
+    Q_PROPERTY(int undoLimit READ undoLimit WRITE setUndoLimit)
+
+public:
+    explicit QUndoStack(QObject *parent = 0);
+    ~QUndoStack();
+    void clear();
+
+    void push(QUndoCommand *cmd);
+
+    bool canUndo() const;
+    bool canRedo() const;
+    QString undoText() const;
+    QString redoText() const;
+
+    int count() const;
+    int index() const;
+    QString text(int idx) const;
+
+#ifndef QT_NO_ACTION
+    QAction *createUndoAction(QObject *parent,
+                                const QString &prefix = QString()) const;
+    QAction *createRedoAction(QObject *parent,
+                                const QString &prefix = QString()) const;
+#endif // QT_NO_ACTION
+
+    bool isActive() const;
+    bool isClean() const;
+    int cleanIndex() const;
+
+    void beginMacro(const QString &text);
+    void endMacro();
+
+    void setUndoLimit(int limit);
+    int undoLimit() const;
+
+    const QUndoCommand *command(int index) const;
+
+public Q_SLOTS:
+    void setClean();
+    void setIndex(int idx);
+    void undo();
+    void redo();
+    void setActive(bool active = true);
+
+Q_SIGNALS:
+    void indexChanged(int idx);
+    void cleanChanged(bool clean);
+    void canUndoChanged(bool canUndo);
+    void canRedoChanged(bool canRedo);
+    void undoTextChanged(const QString &undoText);
+    void redoTextChanged(const QString &redoText);
+
+private:
+    Q_DISABLE_COPY(QUndoStack)
+    friend class QUndoGroup;
+};
+
+#endif // QT_NO_UNDOSTACK
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QUNDOSTACK_H