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diff --git a/sd/source/ui/slidesorter/cache/SlsQueueProcessor.hxx b/sd/source/ui/slidesorter/cache/SlsQueueProcessor.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_SLIDESORTER_QUEUE_PROCESSOR_HXX
+#define SD_SLIDESORTER_QUEUE_PROCESSOR_HXX
+
+#include "cache/SlsPageCache.hxx"
+#include "SlsRequestPriorityClass.hxx"
+#include "SlsBitmapFactory.hxx"
+#include "view/SlideSorterView.hxx"
+#include "tools/IdleDetection.hxx"
+#include "SlsBitmapCache.hxx"
+#include "sdpage.hxx"
+#include "Window.hxx"
+
+#include <svx/svdpagv.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/timer.hxx>
+#include <boost/function.hpp>
+
+
+namespace sd { namespace slidesorter { namespace view {
+class SlideSorterView;
+} } }
+
+
+
+namespace sd { namespace slidesorter { namespace cache {
+
+class BitmapCache;
+class RequestQueue;
+
+
+
+/** This queue processor is timer based, i.e. when an entry is added to the
+    queue and the processor is started with Start() in the base class a
+    timer is started that eventually calls ProcessRequest().  This is
+    repeated until the queue is empty or Stop() is called.
+*/
+class QueueProcessor
+{
+public:
+    typedef ::boost::function<bool()> IdleDetectionCallback;
+    QueueProcessor (
+        RequestQueue& rQueue,
+        const ::boost::shared_ptr<BitmapCache>& rpCache,
+        const Size& rPreviewSize,
+        const bool bDoSuperSampling,
+        const SharedCacheContext& rpCacheContext);
+    virtual ~QueueProcessor();
+
+    /** Start the processor.  This implementation is timer based and waits
+        an defined amount of time that depends on the given argument before
+        the next entry in the queue is processed.
+        @param nPriorityClass
+            A priority class of 0 tells the processor that a high priority
+            request is waiting in the queue.  The time to wait is thus
+            shorter then that for a low priority request (denoted by a value
+            of 1.)  When the timer is already running it is not modified.
+    */
+    void Start (int nPriorityClass = 0);
+    void Stop (void);
+    void Pause (void);
+    void Resume (void);
+
+    void Terminate (void);
+
+    void SetPreviewSize (
+        const Size& rSize,
+        const bool bDoSuperSampling);
+
+    /** As we can not really terminate the rendering of a preview bitmap for
+        a request in midair this method acts more like a semaphor.  It
+        returns only when it is save for the caller to delete the request.
+        For this to work it is important to remove the request from the
+        queue before calling this method.
+    */
+    void RemoveRequest (CacheKey aKey);
+
+    /** Use this method when the page cache is (maybe) using a different
+        BitmapCache.  This is usually necessary after calling
+        PageCacheManager::ChangeSize().
+    */
+    void SetBitmapCache (const ::boost::shared_ptr<BitmapCache>& rpCache);
+
+private:
+    /** This mutex is used to guard the queue processor.  Be carefull not to
+        mix its use with that of the solar mutex.
+    */
+    ::osl::Mutex maMutex;
+
+    Timer maTimer;
+    DECL_LINK(ProcessRequestHdl, Timer*);
+    sal_uInt32 mnTimeBetweenHighPriorityRequests;
+    sal_uInt32 mnTimeBetweenLowPriorityRequests;
+    sal_uInt32 mnTimeBetweenRequestsWhenNotIdle;
+    Size maPreviewSize;
+    bool mbDoSuperSampling;
+    SharedCacheContext mpCacheContext;
+    RequestQueue& mrQueue;
+    ::boost::shared_ptr<BitmapCache> mpCache;
+    BitmapFactory maBitmapFactory;
+    bool mbIsPaused;
+
+    void ProcessRequests (void);
+    void ProcessOneRequest (
+        CacheKey aKey,
+        const RequestPriorityClass ePriorityClass);
+};
+
+
+
+
+} } } // end of namespace ::sd::slidesorter::cache
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */