/****************************************************************************

**

** 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 QUNDOGROUP_H

#define QUNDOGROUP_H

#include <QtCore/qobject.h>

#include <QtCore/qstring.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

class QUndoGroupPrivate;

class QUndoStack;

class QAction;

QT_MODULE(Gui)

#ifndef QT_NO_UNDOGROUP

class Q_GUI_EXPORT QUndoGroup : public QObject

{

    Q_OBJECT

    Q_DECLARE_PRIVATE(QUndoGroup)

public:

    explicit QUndoGroup(QObject *parent = 0);

    ~QUndoGroup();

    void addStack(QUndoStack *stack);

    void removeStack(QUndoStack *stack);

    QList<QUndoStack*> stacks() const;

    QUndoStack *activeStack() 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 canUndo() const;

    bool canRedo() const;

    QString undoText() const;

    QString redoText() const;

    bool isClean() const;

public Q_SLOTS:

    void undo();

    void redo();

    void setActiveStack(QUndoStack *stack);

Q_SIGNALS:

    void activeStackChanged(QUndoStack *stack);

    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(QUndoGroup)

};

#endif // QT_NO_UNDOGROUP

QT_END_NAMESPACE

QT_END_HEADER

#endif // QUNDOGROUP_H