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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: */
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