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diff --git a/src/Authoring/Qt3DStudio/Palettes/TimelineGraphicsView/RowMover.h b/src/Authoring/Qt3DStudio/Palettes/TimelineGraphicsView/RowMover.h
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+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef ROWMOVER_H
+#define ROWMOVER_H
+
+#include "TimelineConstants.h"
+#include "TimelineItem.h"
+#include "DocumentEditorEnumerations.h"
+#include "StudioObjectTypes.h"
+#include <QtCore/qtimer.h>
+#include <QtCore/qpointer.h>
+
+class RowTree;
+class TimelineGraphicsScene;
+
+class RowMover : public TimelineItem
+{
+public:
+    RowMover(TimelineGraphicsScene *m_scene);
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+               QWidget *widget = nullptr) override;
+
+    void start(const QVector<RowTree *> &rows);
+    void end(bool force = false);
+    void updateTargetRow(const QPointF &scenePos, EStudioObjectType rowType = OBJTYPE_UNKNOWN,
+                         Q3DStudio::DocumentEditorFileType::Enum fileType
+                                                    = Q3DStudio::DocumentEditorFileType::Unknown,
+                         bool firstTry = true);
+    bool isActive() const;
+    RowTree *insertionTarget() const;
+    RowTree *insertionParent() const;
+    QVector<RowTree *> sourceRows() const;
+    void removeSourceRow(RowTree *row);
+    bool shouldDeleteAfterMove() const;
+    int type() const;
+    Q3DStudio::DocumentEditorInsertType::Enum insertionType() const;
+
+private:
+    void updateState(int depth, double y);
+    void resetInsertionParent(RowTree *newParent = nullptr);
+    bool isSourceRowsDescendant(RowTree *row) const;
+    bool sourceRowsHasMaster() const;
+    bool isNextSiblingRow(RowTree *r1, RowTree *r2) const;
+
+    TimelineGraphicsScene *m_scene = nullptr;
+    QPointer<RowTree> m_insertionTarget; // insertion target
+    RowTree *m_insertionParent = nullptr; // insertion parent
+    RowTree *m_rowAutoExpand = nullptr;
+    QVector<RowTree *> m_sourceRows;      // dragged rows
+    bool m_active = false;
+    bool m_deleteAfterMove = false;
+    Q3DStudio::DocumentEditorInsertType::Enum m_insertType =
+            Q3DStudio::DocumentEditorInsertType::Unknown;
+    QTimer m_autoExpandTimer;
+    std::function<void()> updateTargetRowLater = {};
+};
+
+#endif // ROWMOVER_H