itemthumbnailmodel.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2009-03-05
 * Description : Qt item model for database entries with support for thumbnail loading
 *
 * Copyright (C) 2009-2011 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
 * Copyright (C)      2011 by Gilles Caulier <caulier dot gilles at gmail 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_ITEM_THUMBNAIL_MODEL_H
#define DIGIKAM_ITEM_THUMBNAIL_MODEL_H
 
// Local includes
 
#include "itemmodel.h"
#include "thumbnailsize.h"
#include "digikam_export.h"
 
namespace Digikam
{
 
class LoadingDescription;
class ThumbnailLoadThread;
 
class DIGIKAM_DATABASE_EXPORT ItemThumbnailModel : public ItemModel
{
    Q_OBJECT
 
public:
 
    explicit ItemThumbnailModel(QObject* const parent);
    ~ItemThumbnailModel()                                                             override;
 
    void setThumbnailLoadThread(ThumbnailLoadThread* const thread);
    ThumbnailLoadThread* thumbnailLoadThread()                                  const;
 
    void setThumbnailSize(const ThumbnailSize& thumbSize);
 
    void setPreloadThumbnailSize(const ThumbnailSize& thumbSize);
 
    void setExifRotate(bool rotate);
 
    void setEmitDataChanged(bool emitSignal);
 
    void setPreloadThumbnails(bool preload);
 
    ThumbnailSize thumbnailSize()                                               const;
 
    QVariant data(const QModelIndex& index, int role = Qt::DisplayRole)         const override;
 
    bool setData(const QModelIndex& index,
                         const QVariant& value,
                         int role = Qt::DisplayRole)                                  override;
 
public Q_SLOTS:
 
    void prepareThumbnails(const QList<QModelIndex>& indexesToPrepare);
    void prepareThumbnails(const QList<QModelIndex>& indexesToPrepare,
                           const ThumbnailSize& thumbSize);
 
    void preloadThumbnails(const QList<ItemInfo>&);
    void preloadThumbnails(const QList<QModelIndex>&);
    void preloadAllThumbnails();
 
Q_SIGNALS:
 
    void thumbnailAvailable(const QModelIndex& index, int requestedSize);
    void thumbnailFailed(const QModelIndex& index, int requestedSize);
 
protected:
 
    void imageInfosCleared()                                                  override;
 
protected Q_SLOTS:
 
    void slotThumbnailLoaded(const LoadingDescription& loadingDescription,
                             const QPixmap& thumb);
 
private:
 
    // Disable
    ItemThumbnailModel(const ItemThumbnailModel&)            = delete;
    ItemThumbnailModel& operator=(const ItemThumbnailModel&) = delete;
 
    class Private;
    Private* const d;
};
 
} // namespace Digikam
 
#endif // DIGIKAM_ITEM_THUMBNAIL_MODEL_H