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- // -*- c++ -*-
- // vim: ts=4 sw=4 et
- /* This file is part of the KDE libraries
- Copyright (C) 2000 David Faure <faure@kde.org>
- 2000 Carsten Pfeiffer <pfeiffer@kde.org>
- 2001 Malte Starostik <malte.starostik@t-online.de>
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public License
- along with this library; see the file COPYING.LIB. If not, write to
- the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
- */
-
- #ifndef __kio_previewjob_h__
- #define __kio_previewjob_h__
-
- #include <kfileitem.h>
- #include <kio/job.h>
-
- class QPixmap;
-
- namespace KIO {
- /*!
- * This class catches a preview (thumbnail) for files.
- * @short KIO Job to get a thumbnail picture
- */
- class KIO_EXPORT PreviewJob : public KIO::Job
- {
- Q_OBJECT
- public:
- /**
- * Creates a new PreviewJob.
- * @param items a list of files to create previews for
- * @param width the desired width
- * @param height the desired height, 0 to use the @p width
- * @param iconSize the size of the mimetype icon to overlay over the
- * preview or zero to not overlay an icon. This has no effect if the
- * preview plugin that will be used doesn't use icon overlays.
- * @param iconAlpha transparency to use for the icon overlay
- * @param scale if the image is to be scaled to the requested size or
- * returned in its original size
- * @param save if the image should be cached for later use
- * @param enabledPlugins if non-zero, this points to a list containing
- * the names of the plugins that may be used.
- * @param deleteItems true to delete the items when done
- */
- PreviewJob( const KFileItemList &items, int width, int height,
- int iconSize, int iconAlpha, bool scale, bool save,
- const QStringList *enabledPlugins, bool deleteItems = false );
- virtual ~PreviewJob();
-
- /**
- * Removes an item from preview processing. Use this if you passed
- * an item to filePreview and want to delete it now.
- *
- * @param item the item that should be removed from the preview queue
- */
- void removeItem( const KFileItem *item );
-
- /**
- * If @p ignoreSize is true, then the preview is always
- * generated regardless of the settings
- *
- * @since KDE 3.4
- **/
- void setIgnoreMaximumSize(bool ignoreSize = true);
-
- /**
- * Returns a list of all available preview plugins. The list
- * contains the basenames of the plugins' .desktop files (no path,
- * no .desktop).
- * @return the list of plugins
- */
- static QStringList availablePlugins();
-
- /**
- * Returns a list of all supported MIME types. The list can
- * contain entries like text/ * (without the space).
- * @return the list of mime types
- */
- static QStringList supportedMimeTypes();
-
- /**
- * Reimplemented for internal reasons
- */
- virtual void kill( bool quietly = true );
-
- signals:
- /**
- * Emitted when a thumbnail picture for @p item has been successfully
- * retrieved.
- * @param item the file of the preview
- * @param preview the preview image
- */
- void gotPreview( const KFileItem *item, const QPixmap &preview );
- /**
- * Emitted when a thumbnail for @p item could not be created,
- * either because a ThumbCreator for its MIME type does not
- * exist, or because something went wrong.
- * @param item the file that failed
- */
- void failed( const KFileItem *item );
-
- protected:
- void getOrCreateThumbnail();
- bool statResultThumbnail();
- void createThumbnail( QString );
-
- protected slots:
- virtual void slotResult( KIO::Job *job );
-
- private slots:
- void startPreview();
- void slotThumbData(KIO::Job *, const QByteArray &);
-
- private:
- void determineNextFile();
- void emitPreview(const QImage &thumb);
- void emitFailed(const KFileItem *item = 0);
-
- protected:
- virtual void virtual_hook( int id, void* data );
- private:
- struct PreviewJobPrivate *d;
- };
-
- /**
- * Creates a PreviewJob to generate or retrieve a preview image
- * for the given URL.
- *
- * @param items files to get previews for
- * @param width the maximum width to use
- * @param height the maximum height to use, if this is 0, the same
- * value as width is used.
- * @param iconSize the size of the mimetype icon to overlay over the
- * preview or zero to not overlay an icon. This has no effect if the
- * preview plugin that will be used doesn't use icon overlays.
- * @param iconAlpha transparency to use for the icon overlay
- * @param scale if the image is to be scaled to the requested size or
- * returned in its original size
- * @param save if the image should be cached for later use
- * @param enabledPlugins if non-zero, this points to a list containing
- * the names of the plugins that may be used.
- * @return the new PreviewJob
- * @see PreviewJob::availablePlugins()
- */
- KIO_EXPORT PreviewJob *filePreview( const KFileItemList &items, int width, int height = 0, int iconSize = 0, int iconAlpha = 70, bool scale = true, bool save = true, const QStringList *enabledPlugins = 0 );
-
- /**
- * Creates a PreviewJob to generate or retrieve a preview image
- * for the given URL.
- *
- * @param items files to get previews for
- * @param width the maximum width to use
- * @param height the maximum height to use, if this is 0, the same
- * value as width is used.
- * @param iconSize the size of the mimetype icon to overlay over the
- * preview or zero to not overlay an icon. This has no effect if the
- * preview plugin that will be used doesn't use icon overlays.
- * @param iconAlpha transparency to use for the icon overlay
- * @param scale if the image is to be scaled to the requested size or
- * returned in its original size
- * @param save if the image should be cached for later use
- * @param enabledPlugins if non-zero, this points to a list containing
- * the names of the plugins that may be used.
- * @return the new PreviewJob
- * @see PreviewJob::availablePlugins()
- */
- KIO_EXPORT PreviewJob *filePreview( const KURL::List &items, int width, int height = 0, int iconSize = 0, int iconAlpha = 70, bool scale = true, bool save = true, const QStringList *enabledPlugins = 0 );
- }
-
- #endif
-