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diff --git a/src/Authoring/Qt3DStudio/Palettes/Timeline/Bindings/ITimelineTimebar.h b/src/Authoring/Qt3DStudio/Palettes/Timeline/Bindings/ITimelineTimebar.h
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+/****************************************************************************
+**
+** Copyright (C) 2008 NVIDIA Corporation.
+** Copyright (C) 2017 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 INCLUDED_ITIMELINE_TIMEBAR_H
+#define INCLUDED_ITIMELINE_TIMEBAR_H 1
+
+#pragma once
+
+#include "Qt3DSString.h"
+
+class ITimeChangeCallback;
+
+class CColor;
+
+//=============================================================================
+/**
+ * Interface for a Timebar
+ */
+//=============================================================================
+class ITimelineTimebar
+{
+public:
+    virtual ~ITimelineTimebar() {}
+
+    virtual long GetStartTime() const = 0;
+    virtual long GetEndTime() const = 0;
+    virtual long GetDuration() const = 0;
+    virtual bool ShowHandleBars() const = 0;
+    //=============================================================================
+    /**
+     * TODO: consider refactor. drag&drop specfics should not be in the Data Model.
+     */
+    virtual void OnBeginDrag() = 0;
+    //
+    virtual void OffsetTime(long inDiff) = 0;
+    // Change the start time or the end time of the timebar. inTime: time to change to, inSetStart:
+    // true to set start time, false to set end time.
+    virtual void ChangeTime(long inTime, bool inSetStart) = 0;
+    virtual void CommitTimeChange() = 0;
+    virtual void RollbackTimeChange() = 0;
+    //
+    virtual CColor GetTimebarColor() = 0;
+    virtual QString GetTimebarComment() const = 0;
+    virtual void SetTimebarComment(const QString &inComment) = 0;
+    virtual void SetTimebarTime(ITimeChangeCallback *inCallback = nullptr) = 0;
+};
+
+#endif // INCLUDED_ITIMELINE_TIMEBAR_H