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diff --git a/src/gui/util/qundogroup.h b/src/gui/util/qundogroup.h
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+/****************************************************************************
+**
+** Copyright (C) 2020 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 QUNDOGROUP_H
+#define QUNDOGROUP_H
+
+#include <QtGui/qtguiglobal.h>
+#include <QtCore/qobject.h>
+#include <QtCore/qstring.h>
+
+QT_REQUIRE_CONFIG(undogroup);
+
+QT_BEGIN_NAMESPACE
+
+class QUndoGroupPrivate;
+class QUndoStack;
+class QAction;
+
+class Q_GUI_EXPORT QUndoGroup : public QObject
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QUndoGroup)
+
+public:
+    explicit QUndoGroup(QObject *parent = nullptr);
+    ~QUndoGroup();
+
+    void addStack(QUndoStack *stack);
+    void removeStack(QUndoStack *stack);
+    QList<QUndoStack*> stacks() const;
+    QUndoStack *activeStack() 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 canUndo() const;
+    bool canRedo() const;
+    QString undoText() const;
+    QString redoText() const;
+    bool isClean() const;
+
+public Q_SLOTS:
+    void undo();
+    void redo();
+    void setActiveStack(QUndoStack *stack);
+
+Q_SIGNALS:
+    void activeStackChanged(QUndoStack *stack);
+    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(QUndoGroup)
+};
+
+QT_END_NAMESPACE
+
+#endif // QUNDOGROUP_H