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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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//==============================================================================
+// Prefix
+//==============================================================================
+#pragma once
+
+#include "ITimelineTimebar.h"
+
+//=============================================================================
+/**
+ * The current timeline UI design is such that even when no timebar shows up ( with the exception of
+ * the top row, ie the time context )
+ * there is a timebar control to store the keyframes for the animated properties.
+ * Hence, instead of return nullptr for GetTimebar for ITimelineItem, this class will ensure the UI
+ * classes still work.
+ */
+class CEmptyTimelineTimebar : public ITimelineTimebar
+{
+public:
+ CEmptyTimelineTimebar();
+ virtual ~CEmptyTimelineTimebar();
+
+ // ITimelineTimebar
+ long GetStartTime() const override;
+ long GetEndTime() const override;
+ long GetDuration() const override;
+ bool ShowHandleBars() const override;
+ void OnBeginDrag() override;
+ void OffsetTime(long inDiff) override;
+ void ChangeTime(long inTime, bool inSetStart) override;
+ void CommitTimeChange() override;
+ void RollbackTimeChange() override;
+ ::CColor GetTimebarColor() override;
+ void SetTimebarColor(const ::CColor &inColor) override;
+ Q3DStudio::CString GetTimebarComment() override;
+ void SetTimebarComment(const Q3DStudio::CString &inComment) override;
+ void SetTimebarTime(ITimeChangeCallback *inCallback = nullptr) override;
+};