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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWidgets module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QUNDOSTACK_H
#define QUNDOSTACK_H
#include <QtWidgets/qtwidgetsglobal.h>
#include <QtCore/qobject.h>
#include <QtCore/qstring.h>
QT_REQUIRE_CONFIG(undocommand);
QT_BEGIN_NAMESPACE
class QAction;
class QUndoCommandPrivate;
class QUndoStackPrivate;
class Q_WIDGETS_EXPORT QUndoCommand
{
QUndoCommandPrivate *d;
public:
explicit QUndoCommand(QUndoCommand *parent = Q_NULLPTR);
explicit QUndoCommand(const QString &text, QUndoCommand *parent = Q_NULLPTR);
virtual ~QUndoCommand();
virtual void undo();
virtual void redo();
QString text() const;
QString actionText() const;
void setText(const QString &text);
bool isObsolete() const;
void setObsolete(bool obsolete);
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;
};
#if QT_CONFIG(undostack)
class Q_WIDGETS_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 = Q_NULLPTR);
~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 resetClean();
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_CONFIG(undostack)
QT_END_NAMESPACE
#endif // QUNDOSTACK_H
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