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diff --git a/vcl/inc/scrwnd.hxx b/vcl/inc/scrwnd.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_VCL_INC_SCRWND_HXX
+#define INCLUDED_VCL_INC_SCRWND_HXX
+
+#include <vcl/toolkit/floatwin.hxx>
+#include <vcl/bitmap.hxx>
+#include <vcl/image.hxx>
+
+class Timer;
+
+enum class WheelMode {
+    NONE      = 0x0000,
+    VH        = 0x0001,
+    V         = 0x0002,
+    H         = 0x0004,
+    ScrollVH  = 0x0008,
+    ScrollV   = 0x0010,
+    ScrollH   = 0x0020
+};
+namespace o3tl {
+    template<> struct typed_flags<WheelMode> : is_typed_flags<WheelMode, 0x003f> {};
+}
+
+class ImplWheelWindow final : public FloatingWindow
+{
+private:
+
+    std::vector<Image>  maImgList;
+    Point               maLastMousePos;
+    Point               maCenter;
+    std::unique_ptr<Timer> mpTimer;
+    sal_uInt64          mnRepaintTime;
+    sal_uInt64          mnTimeout;
+    WheelMode           mnWheelMode;
+    sal_uLong           mnMaxWidth;
+    sal_uLong           mnActDist;
+    tools::Long                mnActDeltaX;
+    tools::Long                mnActDeltaY;
+    void                ImplCreateImageList();
+    void                ImplSetRegion(const Bitmap& rRegionBmp);
+    using Window::ImplGetMousePointer;
+    PointerStyle        ImplGetMousePointer( tools::Long nDistX, tools::Long nDistY ) const;
+    void                ImplDrawWheel(vcl::RenderContext& rRenderContext);
+    void                ImplRecalcScrollValues();
+
+                        DECL_LINK(ImplScrollHdl, Timer *, void);
+
+    virtual void        Paint( vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect ) override;
+    virtual void        MouseMove( const MouseEvent& rMEvt ) override;
+    virtual void        MouseButtonUp( const MouseEvent& rMEvt ) override;
+
+public:
+
+    explicit ImplWheelWindow( vcl::Window* pParent );
+    virtual             ~ImplWheelWindow() override;
+    virtual void        dispose() override;
+
+    void                ImplStop();
+    void                ImplSetWheelMode( WheelMode nWheelMode );
+};
+
+#endif // INCLUDED_VCL_INC_SCRWND_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */