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diff --git a/sdext/source/presenter/PresenterScrollBar.hxx b/sdext/source/presenter/PresenterScrollBar.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_SDEXT_SOURCE_PRESENTER_PRESENTERSCROLLBAR_HXX
+#define INCLUDED_SDEXT_SOURCE_PRESENTER_PRESENTERSCROLLBAR_HXX
+
+#include "PresenterBitmapContainer.hxx"
+#include <com/sun/star/awt/XWindow.hpp>
+#include <com/sun/star/drawing/XPresenterHelper.hpp>
+#include <com/sun/star/rendering/XCanvas.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+
+#include <functional>
+#include <memory>
+
+namespace sdext::presenter {
+
+class PresenterCanvasHelper;
+class PresenterPaintManager;
+
+typedef ::cppu::WeakComponentImplHelper <
+    css::awt::XWindowListener,
+    css::awt::XPaintListener,
+    css::awt::XMouseListener,
+    css::awt::XMouseMotionListener
+> PresenterScrollBarInterfaceBase;
+
+/** Base class of horizontal and vertical scroll bars.
+*/
+class PresenterScrollBar
+    : private ::cppu::BaseMutex,
+      public PresenterScrollBarInterfaceBase
+{
+public:
+    virtual ~PresenterScrollBar() override;
+    PresenterScrollBar(const PresenterScrollBar&) = delete;
+    PresenterScrollBar& operator=(const PresenterScrollBar&) = delete;
+
+    virtual void SAL_CALL disposing() override;
+
+    css::uno::Reference<css::uno::XComponentContext> const&
+        GetComponentContext() const { return mxComponentContext; }
+
+    void SetVisible (const bool bIsVisible);
+
+    /** Set the bounding box of the scroll bar.
+    */
+    void SetPosSize (const css::geometry::RealRectangle2D& rBox);
+
+    /** Set the position of the movable thumb.
+        @param nPosition
+            A value between 0 and the last value given to SetTotalSize()
+            minus the last value given to SetThumbSize().
+    */
+    void SetThumbPosition (
+        double nPosition,
+        const bool bAsynchronousRepaint);
+
+    double GetThumbPosition() const { return mnThumbPosition;}
+
+    /** Set the upper border of the slider range.
+    */
+    void SetTotalSize (const double nTotalSize);
+
+    /** Set the size of the movable thumb.
+        @param nThumbSize
+            A value not larger than the last value given to SetTotalSize().
+    */
+    void SetThumbSize (const double nThumbSize);
+    double GetThumbSize() const { return mnThumbSize;}
+
+    void SetLineHeight (const double nLineHeight);
+    double GetLineHeight() const { return mnLineHeight;}
+
+    /** Set the canvas that is used for painting the scroll bar.
+    */
+    void SetCanvas (const css::uno::Reference<css::rendering::XCanvas>& rxCanvas);
+
+    void SetBackground (const SharedBitmapDescriptor& rpBackgroundBitmap);
+
+    /** Call this after changing total size or thumb position or size to
+        move the thumb to a valid position.
+    */
+    void CheckValues();
+
+    /** On some occasions it is necessary to trigger the painting of a
+        scrollbar from the outside.
+    */
+    void Paint (
+        const css::awt::Rectangle& rUpdateBox);
+
+    virtual sal_Int32 GetSize() const = 0;
+
+    // XWindowListener
+
+    virtual void SAL_CALL windowResized (const css::awt::WindowEvent& rEvent) override;
+
+    virtual void SAL_CALL windowMoved (const css::awt::WindowEvent& rEvent) override;
+
+    virtual void SAL_CALL windowShown (const css::lang::EventObject& rEvent) override;
+
+    virtual void SAL_CALL windowHidden (const css::lang::EventObject& rEvent) override;
+
+    // XPaintListener
+
+    virtual void SAL_CALL windowPaint (const css::awt::PaintEvent& rEvent) override;
+
+    // XMouseListener
+
+    virtual void SAL_CALL mousePressed (const css::awt::MouseEvent& rEvent) override;
+
+    virtual void SAL_CALL mouseReleased (const css::awt::MouseEvent& rEvent) override;
+
+    virtual void SAL_CALL mouseEntered (const css::awt::MouseEvent& rEvent) override;
+
+    virtual void SAL_CALL mouseExited (const css::awt::MouseEvent& rEvent) override;
+
+    // XMouseMotionListener
+
+    virtual void SAL_CALL mouseMoved (const css::awt::MouseEvent& rEvent) override;
+
+    virtual void SAL_CALL mouseDragged (const css::awt::MouseEvent& rEvent) override;
+
+    // lang::XEventListener
+    virtual void SAL_CALL disposing (const css::lang::EventObject& rEvent) override;
+
+    enum Area { Total, Pager, Thumb, PagerUp, PagerDown, PrevButton, NextButton, None,
+                AreaCount = None };
+
+protected:
+    css::uno::Reference<css::uno::XComponentContext> mxComponentContext;
+    css::uno::Reference<css::awt::XWindow> mxWindow;
+    css::uno::Reference<css::rendering::XCanvas> mxCanvas;
+    css::uno::Reference<css::drawing::XPresenterHelper> mxPresenterHelper;
+    std::shared_ptr<PresenterPaintManager> mpPaintManager;
+    double mnThumbPosition;
+    double mnTotalSize;
+    double mnThumbSize;
+    double mnLineHeight;
+    css::geometry::RealPoint2D maDragAnchor;
+    ::std::function<void (double)> maThumbMotionListener;
+    Area meButtonDownArea;
+    Area meMouseMoveArea;
+    css::geometry::RealRectangle2D maBox[AreaCount];
+    bool mbIsNotificationActive;
+    static std::weak_ptr<PresenterBitmapContainer> mpSharedBitmaps;
+    std::shared_ptr<PresenterBitmapContainer> mpBitmaps;
+    SharedBitmapDescriptor mpPrevButtonDescriptor;
+    SharedBitmapDescriptor mpNextButtonDescriptor;
+    SharedBitmapDescriptor mpPagerStartDescriptor;
+    SharedBitmapDescriptor mpPagerCenterDescriptor;
+    SharedBitmapDescriptor mpPagerEndDescriptor;
+    SharedBitmapDescriptor mpThumbStartDescriptor;
+    SharedBitmapDescriptor mpThumbCenterDescriptor;
+    SharedBitmapDescriptor mpThumbEndDescriptor;
+    bool maEnabledState[AreaCount];
+
+    css::geometry::RealRectangle2D const & GetRectangle (const Area eArea) const;
+    virtual double GetDragDistance (const sal_Int32 nX, const sal_Int32 nY) const = 0;
+    virtual void UpdateDragAnchor (const double nDragDistance) = 0;
+    virtual double GetMinor (const double nX, const double nY) const = 0;
+    virtual void UpdateBorders() = 0;
+    virtual void UpdateBitmaps() = 0;
+    virtual void PaintComposite(
+        const css::awt::Rectangle& rRepaintBox,
+        const Area eArea,
+        const SharedBitmapDescriptor& rpStartBitmaps,
+        const SharedBitmapDescriptor& rpCenterBitmaps,
+        const SharedBitmapDescriptor& rpEndBitmaps) = 0;
+
+    PresenterScrollBar (
+        const css::uno::Reference<css::uno::XComponentContext>& rxComponentContext,
+        const css::uno::Reference<css::awt::XWindow>& rxParentWindow,
+        const std::shared_ptr<PresenterPaintManager>& rpPaintManager,
+        const ::std::function<void (double)>& rThumbMotionListener);
+
+    void Repaint (
+        const css::geometry::RealRectangle2D& rBox,
+        const bool bAsynchronous);
+    void PaintBackground (
+        const css::awt::Rectangle& rRepaintBox);
+    void PaintBitmap(
+        const css::awt::Rectangle& rRepaintBox,
+        const Area eArea,
+        const SharedBitmapDescriptor& rpBitmaps);
+    void UpdateWidthOrHeight (sal_Int32& rSize,
+        const SharedBitmapDescriptor& rpDescriptor);
+    css::uno::Reference<css::rendering::XBitmap> GetBitmap (
+        const Area eArea,
+        const SharedBitmapDescriptor& rpBitmaps) const;
+    PresenterBitmapContainer::BitmapDescriptor::Mode GetBitmapMode (
+        const Area eArea) const;
+    bool IsDisabled (const Area eArea) const;
+    double ValidateThumbPosition (double nPosition);
+
+private:
+    class MousePressRepeater;
+    std::shared_ptr<MousePressRepeater> mpMousePressRepeater;
+    SharedBitmapDescriptor mpBackgroundBitmap;
+    std::unique_ptr<PresenterCanvasHelper> mpCanvasHelper;
+
+    Area GetArea (const double nX, const double nY) const;
+};
+
+/** A vertical scroll bar.
+*/
+class PresenterVerticalScrollBar : public PresenterScrollBar
+{
+public:
+    PresenterVerticalScrollBar (
+        const css::uno::Reference<css::uno::XComponentContext>& rxComponentContext,
+        const css::uno::Reference<css::awt::XWindow>& rxParentWindow,
+        const std::shared_ptr<PresenterPaintManager>& rpPaintManager,
+        const ::std::function<void (double)>& rThumbMotionListener);
+    virtual ~PresenterVerticalScrollBar() override;
+    virtual sal_Int32 GetSize() const override;
+
+protected:
+    virtual double GetDragDistance (const sal_Int32 nX, const sal_Int32 nY) const override;
+    virtual void UpdateDragAnchor (const double nDragDistance) override;
+    virtual double GetMinor (const double nX, const double nY) const override;
+    virtual void UpdateBorders() override;
+    virtual void UpdateBitmaps() override;
+    virtual void PaintComposite(
+        const css::awt::Rectangle& rRepaintBox,
+        const Area eArea,
+        const SharedBitmapDescriptor& rpStartBitmaps,
+        const SharedBitmapDescriptor& rpCenterBitmaps,
+        const SharedBitmapDescriptor& rpEndBitmaps) override;
+
+private:
+    sal_Int32 mnScrollBarWidth;
+};
+
+} // end of namespace ::sdext::presenter
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */