albumthumbnailloader.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2006-04-14
 * Description : Load and cache tag thumbnails
 *
 * Copyright (C) 2006-2010 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
 * Copyright (C) 2015      by Mohamed_Anwer <m_dot_anwer at gmx dot com>
 *
 * 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, 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.
 *
 * ============================================================ */
 
#ifndef DIGIKAM_ALBUM_THUMBNAIL_LOADER_H
#define DIGIKAM_ALBUM_THUMBNAIL_LOADER_H
 
// Qt includes
 
#include <QObject>
#include <QPixmap>
 
// Local includes
 
#include "digikam_export.h"
 
namespace Digikam
{
class Album;
class TAlbum;
class PAlbum;
class LoadingDescription;
 
class DIGIKAM_GUI_EXPORT AlbumThumbnailLoader : public QObject
{
    Q_OBJECT
 
public:
 
    enum RelativeSize
    {
        NormalSize,
        SmallerSize
    };
 
public:
 
    void cleanUp();
 
    void setThumbnailSize(int size, int face);
 
    int  thumbnailSize() const;
 
    bool getAlbumThumbnail(PAlbum* const album);
 
    QPixmap getAlbumThumbnailDirectly(PAlbum* const album);
 
    bool getTagThumbnail(TAlbum* const album, QPixmap& icon);
 
    QPixmap getTagThumbnailDirectly(TAlbum* const album);
 
    QPixmap getFaceThumbnailDirectly(TAlbum* const album);
 
    QPixmap getStandardTagIcon(RelativeSize size = NormalSize);
    QPixmap getStandardTagRootIcon(RelativeSize size = NormalSize);
    QPixmap getStandardTagIcon(TAlbum* const album, RelativeSize size = NormalSize);
    QPixmap getStandardFaceIcon(TAlbum* const album, RelativeSize size = NormalSize);
    QPixmap getNewTagIcon(RelativeSize size = NormalSize);
 
    QPixmap getStandardAlbumIcon(RelativeSize size = NormalSize);
    QPixmap getStandardAlbumTrashIcon(RelativeSize size = NormalSize);
    QPixmap getStandardAlbumRootIcon(RelativeSize size = NormalSize);
    QPixmap getStandardAlbumIcon(PAlbum* const album, RelativeSize size = NormalSize);
 
/*
    QImage getAlbumPreviewDirectly(PAlbum* const album, int size);
*/
 
public:
 
    static AlbumThumbnailLoader* instance();
 
Q_SIGNALS:
 
    void signalThumbnail(Album* album, const QPixmap&);
 
    void signalFailed(Album* album);
 
    void signalReloadThumbnails();
 
    void signalDispatchThumbnailInternal(int albumID, const QPixmap& thumbnail);
 
protected Q_SLOTS:
 
    void slotGotThumbnailFromIcon(const LoadingDescription& loadingDescription, const QPixmap& pixmap);
    void slotIconChanged(Album* album);
    void slotDispatchThumbnailInternal(int albumID, const QPixmap& thumbnail);
 
private:
 
    // Disable
    AlbumThumbnailLoader();
    explicit AlbumThumbnailLoader(QObject*) = delete;
    ~AlbumThumbnailLoader() override;
 
    void    addUrl(Album* const album, qlonglong id);
    QPixmap loadIcon(const QString& name, int size = 0) const;
    int     computeIconSize(RelativeSize size)          const;
    int     computeFaceSize(RelativeSize size)          const;
 
private:
 
    friend class AlbumThumbnailLoaderCreator;
 
    class Private;
    Private* const d;
};
 
} // namespace Digikam
 
#endif // DIGIKAM_ALBUM_THUMBNAIL_LOADER_H