/****************************************************************************
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 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 GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#ifndef QUNDOGROUP_H
#define QUNDOGROUP_H

#include <QtCore/qobject.h>
#include <QtCore/qstring.h>

QT_BEGIN_HEADER

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);

    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_HEADER

#endif // QUNDOGROUP_H
