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diff --git a/src/Authoring/Studio/DragAndDrop/DropContainer.h b/src/Authoring/Studio/DragAndDrop/DropContainer.h
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+/****************************************************************************
+**
+** Copyright (C) 1999-2003 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_DROPCONTAINER
+#define INCLUDED_DROPCONTAINER
+
+//==============================================================================
+//	Includes
+//==============================================================================
+#include "DropProxy.h"
+#include "DropSource.h"
+#include <vector>
+
+class CStudioApp;
+
+class CDropContainer
+{
+public:
+    typedef std::vector<long> TFlavor;
+    typedef TFlavor::iterator TFlavorItr;
+
+protected:
+    TFlavor m_Flavors; ///< This is a list of flavors handled by this container.
+
+public:
+    CDropContainer() {}
+    virtual ~CDropContainer() {}
+
+    CDropContainer::TFlavorItr GetFlavorBegin();
+    CDropContainer::TFlavorItr GetFlavorEnd();
+
+    void AddMainFlavor(long inMainFlavor);
+
+    // These need to get implemented by the Cross platform Container.
+    virtual bool OnDragWithin(CDropSource &inSource) = 0;
+    virtual bool OnDragReceive(CDropSource &inSource) = 0;
+    virtual void OnDragLeave() = 0;
+    virtual void OnReflectMouse(CPt &inPoint, Qt::KeyboardModifiers inFlags) = 0;
+};
+
+class CWinDropContainer : public CDropContainer
+{
+public:
+    CWinDropContainer();
+    virtual ~CWinDropContainer();
+
+    void RegiserForDnd(QWidget *inWindow);
+    long ReflectMouse(long inX, long inY);
+
+protected:
+    // These are utility functions.
+    CDropProxy m_DropProxy; ///< The COLEDropSource pass through.
+};
+
+#endif
+\ No newline at end of file