/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
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** $QT_END_LICENSE$
**
****************************************************************************/

#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;


#ifndef QT_NO_UNDOGROUP

class Q_WIDGETS_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