previewloadthread.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2006-01-16
 * Description : image file IO threaded interface.
 *
 * Copyright (C) 2006-2011 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
 *
 * 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_PREVIEW_LOAD_THREAD_H
#define DIGIKAM_PREVIEW_LOAD_THREAD_H
 
// Local includes
 
#include "managedloadsavethread.h"
#include "previewsettings.h"
 
namespace Digikam
{
 
class DIGIKAM_EXPORT PreviewLoadThread : public ManagedLoadSaveThread
{
    Q_OBJECT
 
public:
 
    explicit PreviewLoadThread(QObject* const parent = nullptr);
    ~PreviewLoadThread() override;
 
    void loadFast(const QString& filePath, int size);
 
    void loadFastButLarge(const QString& filePath, int minimumSize);
 
    void loadHighQuality(const QString& filePath,
                         PreviewSettings::RawLoading rawLoadingMode = PreviewSettings::RawPreviewAutomatic);
 
    void load(const QString& filePath, const PreviewSettings& settings, int size = 0);
 
    void load(const LoadingDescription& description);
 
    void setDisplayingWidget(QWidget* const widget);
 
    static DImg loadFastSynchronously(const QString& filePath,
                                      int size,
                                      const IccProfile& profile = IccProfile());
    static DImg loadFastButLargeSynchronously(const QString& filePath,
                                              int minimumSize,
                                              const IccProfile& profile = IccProfile());
    static DImg loadHighQualitySynchronously(const QString& filePath,
                                             PreviewSettings::RawLoading rawLoadingMode = PreviewSettings::RawPreviewAutomatic,
                                             const IccProfile& profile = IccProfile());
    static DImg loadSynchronously(const QString& filePath,
                                  const PreviewSettings& previewSettings,
                                  int size,
                                  const IccProfile& profile = IccProfile());
    static DImg loadSynchronously(const LoadingDescription& description);
 
protected:
 
    static LoadingDescription createLoadingDescription(const QString& filePath,
                                                       const PreviewSettings& settings,
                                                       int size,
                                                       const IccProfile& profile);
    LoadingDescription createLoadingDescription(const QString& filePath,
                                                const PreviewSettings& settings,
                                                int size);
 
protected:
 
    QWidget* m_displayingWidget;
 
private:
 
    // Disable
    PreviewLoadThread(const PreviewLoadThread&)            = delete;
    PreviewLoadThread& operator=(const PreviewLoadThread&) = delete;
};
 
} // namespace Digikam
 
#endif // DIGIKAM_PREVIEW_LOAD_THREAD_H