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Diffstat (limited to 'tdeio/tdeio/previewjob.h')
| -rw-r--r-- | tdeio/tdeio/previewjob.h | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/tdeio/tdeio/previewjob.h b/tdeio/tdeio/previewjob.h new file mode 100644 index 000000000..9c62859c9 --- /dev/null +++ b/tdeio/tdeio/previewjob.h @@ -0,0 +1,182 @@ +// -*- c++ -*- +// vim: ts=4 sw=4 et +/* This file is part of the KDE libraries + Copyright (C) 2000 David Faure <[email protected]> + 2000 Carsten Pfeiffer <[email protected]> + 2001 Malte Starostik <[email protected]> + + 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 <tdefileitem.h> +#include <tdeio/job.h> + +class TQPixmap; + +namespace TDEIO { + /*! + * This class catches a preview (thumbnail) for files. + * @short KIO Job to get a thumbnail picture + */ + class TDEIO_EXPORT PreviewJob : public TDEIO::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 TQStringList *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 TQStringList 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 TQStringList 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 TQPixmap &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( TQString ); + + protected slots: + virtual void slotResult( TDEIO::Job *job ); + + private slots: + void startPreview(); + void slotThumbData(TDEIO::Job *, const TQByteArray &); + + private: + void determineNextFile(); + void emitPreview(const TQImage &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() + */ + TDEIO_EXPORT PreviewJob *filePreview( const KFileItemList &items, int width, int height = 0, int iconSize = 0, int iconAlpha = 70, bool scale = true, bool save = true, const TQStringList *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() + */ + TDEIO_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 TQStringList *enabledPlugins = 0 ); +} + +#endif |