1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtWidgets module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QUNDOGROUP_H 41 #define QUNDOGROUP_H 42 43 #include <QtWidgets/qtwidgetsglobal.h> 44 #include <QtCore/qobject.h> 45 #include <QtCore/qstring.h> 46 47 QT_REQUIRE_CONFIG(undogroup); 48 49 QT_BEGIN_NAMESPACE 50 51 class QUndoGroupPrivate; 52 class QUndoStack; 53 class QAction; 54 55 class Q_WIDGETS_EXPORT QUndoGroup : public QObject 56 { 57 Q_OBJECT 58 Q_DECLARE_PRIVATE(QUndoGroup) 59 60 public: 61 explicit QUndoGroup(QObject *parent = nullptr); 62 ~QUndoGroup(); 63 64 void addStack(QUndoStack *stack); 65 void removeStack(QUndoStack *stack); 66 QList<QUndoStack*> stacks() const; 67 QUndoStack *activeStack() const; 68 69 #ifndef QT_NO_ACTION 70 QAction *createUndoAction(QObject *parent, 71 const QString &prefix = QString()) const; 72 QAction *createRedoAction(QObject *parent, 73 const QString &prefix = QString()) const; 74 #endif // QT_NO_ACTION 75 bool canUndo() const; 76 bool canRedo() const; 77 QString undoText() const; 78 QString redoText() const; 79 bool isClean() const; 80 81 public Q_SLOTS: 82 void undo(); 83 void redo(); 84 void setActiveStack(QUndoStack *stack); 85 86 Q_SIGNALS: 87 void activeStackChanged(QUndoStack *stack); 88 void indexChanged(int idx); 89 void cleanChanged(bool clean); 90 void canUndoChanged(bool canUndo); 91 void canRedoChanged(bool canRedo); 92 void undoTextChanged(const QString &undoText); 93 void redoTextChanged(const QString &redoText); 94 95 private: 96 Q_DISABLE_COPY(QUndoGroup) 97 }; 98 99 QT_END_NAMESPACE 100 101 #endif // QUNDOGROUP_H 102