/**************************************************************************** ** ** Copyright (C) 2010 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. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** 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. ** ** 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 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