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diff --git a/sd/source/ui/presenter/CanvasUpdateRequester.hxx b/sd/source/ui/presenter/CanvasUpdateRequester.hxx
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+++ b/sd/source/ui/presenter/CanvasUpdateRequester.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * 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_PRESENTER_CANVAS_UPDATE_REQUESTER_HEADER
+#define SD_PRESENTER_CANVAS_UPDATE_REQUESTER_HEADER
+
+#include "precompiled_sd.hxx"
+
+#include <com/sun/star/rendering/XSpriteCanvas.hpp>
+#include <boost/noncopyable.hpp>
+#include <boost/shared_ptr.hpp>
+#include <sal/types.h>
+#include <tools/solar.h>
+#include <tools/link.hxx>
+#include <vector>
+
+namespace css = ::com::sun::star;
+
+namespace sd { namespace presenter {
+
+/** Each UpdateRequester handles update requests (calls to
+    XCanvas::updateScreen()) for one shared canvas (a canvas that has one or
+    more PresenterCanvas wrappers).  Multiple calls are collected and lead
+    to a single call to updateScreen.
+*/
+class CanvasUpdateRequester : private ::boost::noncopyable
+{
+public:
+    /** Return the Canvas UpdateRequester object for the given shared
+        canvas.  A new object is created when it does not already exist.
+    */
+    static ::boost::shared_ptr<CanvasUpdateRequester> Instance (
+        const css::uno::Reference<css::rendering::XSpriteCanvas>& rxCanvas);
+
+    void RequestUpdate (const sal_Bool bUpdateAll);
+
+private:
+    CanvasUpdateRequester (const css::uno::Reference<css::rendering::XSpriteCanvas>& rxCanvas);
+    ~CanvasUpdateRequester (void);
+    class Deleter; friend class Deleter;
+
+    typedef ::std::vector<
+        ::std::pair<
+            css::uno::Reference<css::rendering::XSpriteCanvas>,
+           ::boost::shared_ptr<CanvasUpdateRequester> > > RequesterMap;
+    static RequesterMap maRequesterMap;
+
+    css::uno::Reference<css::rendering::XSpriteCanvas> mxCanvas;
+    sal_uLong mnUserEventId;
+    sal_Bool mbUpdateFlag;
+    DECL_LINK(Callback, void*);
+};
+
+} } // end of namespace ::sd::presenter
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */