qundostack.h
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- /****************************************************************************
- **
- ** Copyright (C) 2008 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.
- **
- ** Commercial Usage
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- ** 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 General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License versions 2.0 or 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 GNU General Public Licensing requirements will be met:
- ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
- ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special
- ** exception, Nokia gives you certain additional rights. These rights
- ** are described in the Nokia Qt GPL Exception version 1.3, included in
- ** the file GPL_EXCEPTION.txt in this package.
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- ****************************************************************************/
- #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