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diff --git a/sd/source/ui/slidesorter/inc/controller/SlsVisibleAreaManager.hxx b/sd/source/ui/slidesorter/inc/controller/SlsVisibleAreaManager.hxx
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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef SD_SLIDESORTER_VISIBLE_AREA_MANAGER_HXX
+#define SD_SLIDESORTER_VISIBLE_AREA_MANAGER_HXX
+
+#include "controller/SlsAnimator.hxx"
+#include "model/SlsSharedPageDescriptor.hxx"
+#include <boost/noncopyable.hpp>
+#include <boost/optional.hpp>
+
+namespace sd { namespace slidesorter { namespace controller {
+
+
+/** Manage requests for scrolling page objects into view.
+*/
+class VisibleAreaManager
+    : public ::boost::noncopyable
+{
+public:
+    VisibleAreaManager (SlideSorter& rSlideSorter);
+    ~VisibleAreaManager (void);
+
+    void ActivateCurrentSlideTracking (void);
+    void DeactivateCurrentSlideTracking (void);
+
+    /** Request the current slide to be moved into the visible area.
+        This request is only obeyed when the current slide tracking is
+        active.
+        @see ActivateCurrentSlideTracking() and DeactivateCurrentSlideTracking()
+    */
+    void RequestCurrentSlideVisible (void);
+
+    /** Request to make the specified page object visible.
+    */
+    void RequestVisible (
+        const model::SharedPageDescriptor& rpDescriptor,
+        const bool bForce = false);
+
+    /** Temporarily disable the update of the visible area.
+    */
+    class TemporaryDisabler
+    {
+    public:
+        TemporaryDisabler (SlideSorter& rSlideSorter);
+        ~TemporaryDisabler (void);
+    private:
+        VisibleAreaManager& mrVisibleAreaManager;
+    };
+
+private:
+    SlideSorter& mrSlideSorter;
+
+    /** List of rectangle that someone wants to be moved into the visible
+        area.
+        Cleared on every call to ForgetVisibleRequests() and MakeVisible().
+    */
+    ::std::vector<Rectangle> maVisibleRequests;
+
+    /** Animation id for a scroll animation that sets the top
+        and left of the visible area to maRequestedVisibleTopLeft.
+    */
+    Animator::AnimationId mnScrollAnimationId;
+    Point maRequestedVisibleTopLeft;
+    Animator::AnimationMode meRequestedAnimationMode;
+    bool mbIsCurrentSlideTrackingActive;
+    int  mnDisableCount;
+
+    void MakeVisible (void);
+    ::boost::optional<Point> GetRequestedTopLeft (void) const;
+};
+
+
+} } } // end of namespace ::sd::slidesorter::view
+
+#endif