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/* Gwenview - A simple image viewer for TDE
Copyright 2000-2004 Aur�lien G�teau
This class is based on the ImagePreviewJob class from Konqueror.
Original copyright follows.
*/
/* This file is part of the KDE project
Copyright (C) 2000 David Faure <faure@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef THUMBNAILLOADJOB_H
#define THUMBNAILLOADJOB_H
// TQt
#include <tqimage.h>
#include <tqpixmap.h>
#include <tqvaluelist.h>
#include <tqvaluevector.h>
// KDE
#include <tdeio/job.h>
// Local
#include "tsthread/tsthread.h"
#include "tsthread/tswaitcondition.h"
#include "libgwenview_export.h"
class TDEConfig;
class KFileItem;
typedef TQPtrList<KFileItem> KFileItemList;
namespace Gwenview {
class ThumbnailThread : public TSThread {
Q_OBJECT
public:
void load(
const TQString& originalURI,
time_t originalTime,
int originalSize,
const TQString& originalMimeType,
const TQString& pixPath,
const TQString& thumbnailPath,
int size,
bool storeThumbnail);
protected:
virtual void run();
signals:
void done( const TQImage&, const TQSize&);
private:
bool isJPEG();
bool loadJPEG();
void loadThumbnail();
TQImage mImage;
TQString mPixPath;
TQString mThumbnailPath;
TQString mOriginalURI;
time_t mOriginalTime;
int mOriginalSize;
TQString mOriginalMimeType;
int mOriginalWidth;
int mOriginalHeight;
TQMutex mMutex;
TSWaitCondition mCond;
int mThumbnailSize;
bool mStoreThumbnailsInCache;
};
/**
* A job that determines the thumbnails for the images in the current directory
*/
class LIBGWENVIEW_EXPORT ThumbnailLoadJob : public TDEIO::Job {
Q_OBJECT
public:
/**
* Create a job for determining the pixmaps of the images in the @p itemList
*/
ThumbnailLoadJob(const TQValueVector<const KFileItem*>* itemList, int size);
virtual ~ThumbnailLoadJob();
/**
* Call this to get started
*/
void start();
/**
* To be called whenever an item is removed from the view
*/
void itemRemoved(const KFileItem* item);
/**
* Add an item to a running job
*/
void appendItem(const KFileItem* item);
/**
* Sets items in range first..last to be generated first, starting with current.
*/
void setPriorityItems(const KFileItem* current, const KFileItem* first, const KFileItem* last);
/**
* Temporarily suspends loading. Used if there's a more
* important action going on (loading an image etc.).
*/
void suspend();
/**
* Resumes loading if suspended.
*/
void resume();
/**
* Returns the thumbnail base dir, independent of the thumbnail size
*/
static TQString thumbnailBaseDir();
/**
* Returns the thumbnail base dir, for the @p size
*/
static TQString thumbnailBaseDir(int size);
/**
* Delete the thumbnail for the @p url
*/
static void deleteImageThumbnail(const KURL& url);
signals:
/**
* Emitted when the thumbnail for the @p item has been loaded
*/
void thumbnailLoaded(const KFileItem* item, const TQPixmap&, const TQSize&);
private slots:
void slotResult( TDEIO::Job *job );
void slotGotPreview(const KFileItem*, const TQPixmap&);
void checkThumbnail();
void thumbnailReady(const TQImage& im, const TQSize&);
void emitThumbnailLoadingFailed();
private:
enum { STATE_STATORIG, STATE_DOWNLOADORIG, STATE_PREVIEWJOB, STATE_NEXTTHUMB } mState;
TQValueList<const KFileItem*> mItems;
TQValueVector<const KFileItem* > mAllItems;
TQValueVector< bool > mProcessedState;
const KFileItem *mCurrentItem;
int thumbnailIndex( const KFileItem* item ) const;
void updateItemsOrder();
// indexes of the current, fist and last visible thumbnails
int mCurrentVisibleIndex, mFirstVisibleIndex, mLastVisibleIndex;
// The URL of the current item (always equivalent to m_items.first()->item()->url())
KURL mCurrentURL;
// The URI of the original image (might be different from mCurrentURL.url())
TQString mOriginalURI;
// The modification time of the original image
time_t mOriginalTime;
// The thumbnail path
TQString mThumbnailPath;
// The temporary path for remote urls
TQString mTempPath;
// Thumbnail size
int mThumbnailSize;
TQPixmap mBrokenPixmap;
bool mSuspended;
ThumbnailThread mThumbnailThread;
void determineNextIcon();
void startCreatingThumbnail(const TQString& path);
void emitThumbnailLoaded(const TQImage& img, TQSize size);
void updateItemsOrderHelper( int forward, int backward, int first, int last );
};
inline
int ThumbnailLoadJob::thumbnailIndex( const KFileItem* item ) const {
TQValueVector<const KFileItem* >::ConstIterator pos = tqFind( mAllItems.begin(), mAllItems.end(), item );
if( pos != mAllItems.end()) return pos - mAllItems.begin();
return -1;
}
} // namespace
#endif
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