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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (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 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 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
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