Added old abandoned KDE3 version of gwenview

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/gwenview@1088034 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 211 insertions, 0 deletions

diff --git a/src/gvcore/thumbnailloadjob.h b/src/gvcore/thumbnailloadjob.h
new file mode 100644
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--- /dev/null
+++ b/src/gvcore/thumbnailloadjob.h
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+// vim: set tabstop=4 shiftwidth=4 noexpandtab
+/*	Gwenview - A simple image viewer for KDE
+	Copyright 2000-2004 Aurélien Gâteau
+	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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+#ifndef THUMBNAILLOADJOB_H
+#define THUMBNAILLOADJOB_H
+
+// Qt
+#include <qimage.h>
+#include <qpixmap.h>
+#include <qvaluelist.h>
+#include <qvaluevector.h>
+
+// KDE
+#include <kio/job.h>
+
+// Local
+#include "tsthread/tsthread.h"
+#include "tsthread/tswaitcondition.h"
+
+#include "libgwenview_export.h"
+class KConfig;
+class KFileItem;
+
+typedef QPtrList<KFileItem> KFileItemList;
+
+namespace Gwenview {
+class ThumbnailThread : public TSThread {
+Q_OBJECT
+public:
+	void load(
+		const QString& originalURI,
+		time_t originalTime,
+		int originalSize,
+		const QString& originalMimeType,
+		const QString& pixPath,
+		const QString& thumbnailPath,
+		int size,
+		bool storeThumbnail);
+protected:
+	virtual void run();
+signals:
+	void done( const QImage&, const QSize&);
+private:
+	bool isJPEG();
+	bool loadJPEG();
+	void loadThumbnail();
+	QImage mImage;
+	QString mPixPath;
+	QString mThumbnailPath;
+	QString mOriginalURI;
+	time_t mOriginalTime;
+	int mOriginalSize;
+	QString mOriginalMimeType;
+	int mOriginalWidth;
+	int mOriginalHeight;
+	QMutex 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 KIO::Job {
+Q_OBJECT
+public:
+	/**
+	 * Create a job for determining the pixmaps of the images in the @p itemList
+	 */
+	ThumbnailLoadJob(const QValueVector<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 QString thumbnailBaseDir();
+	
+	/**
+	 * Returns the thumbnail base dir, for the @p size
+	 */
+	static QString 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 QPixmap&, const QSize&);
+
+private slots:
+	void slotResult( KIO::Job *job );
+	void slotGotPreview(const KFileItem*, const QPixmap&);
+	void checkThumbnail();
+	void thumbnailReady(const QImage& im, const QSize&);
+	void emitThumbnailLoadingFailed();
+
+private:
+	enum { STATE_STATORIG, STATE_DOWNLOADORIG, STATE_PREVIEWJOB, STATE_NEXTTHUMB } mState;
+
+	QValueList<const KFileItem*> mItems;
+	QValueVector<const KFileItem* > mAllItems;
+	QValueVector< 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())
+	QString mOriginalURI;
+	
+	// The modification time of the original image
+	time_t mOriginalTime;
+
+	// The thumbnail path
+	QString mThumbnailPath;
+
+	// The temporary path for remote urls
+	QString mTempPath;
+
+	// Thumbnail size
+	int mThumbnailSize;
+
+	QPixmap mBrokenPixmap;
+
+	bool mSuspended;
+
+	ThumbnailThread mThumbnailThread;
+
+	void determineNextIcon();
+	void startCreatingThumbnail(const QString& path);
+	
+	void emitThumbnailLoaded(const QImage& img, QSize size);
+
+	void updateItemsOrderHelper( int forward, int backward, int first, int last );
+};
+
+inline
+int ThumbnailLoadJob::thumbnailIndex( const KFileItem* item ) const {
+	QValueVector<const KFileItem* >::ConstIterator pos = qFind( mAllItems.begin(), mAllItems.end(), item );
+	if( pos != mAllItems.end()) return pos - mAllItems.begin();
+	return -1;
+}
+
+} // namespace
+#endif
+