dimgpreviewitem.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2010-04-30
 * Description : Graphics View items for DImg
 *
 * Copyright (C) 2010-2011 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_DIMG_PREVIEW_ITEM_H
#define DIGIKAM_DIMG_PREVIEW_ITEM_H
 
// Qt includes
 
#include <QGraphicsItem>
#include <QObject>
 
// Local includes
 
#include "digikam_export.h"
#include "graphicsdimgitem.h"
 
namespace Digikam
{
 
class DImg;
class ICCSettingsContainer;
class LoadingDescription;
class PreviewSettings;
 
class DIGIKAM_EXPORT DImgPreviewItem : public GraphicsDImgItem
{
    Q_OBJECT
 
public:
 
    enum State
    {
        NoImage,
        Loading,
        ImageLoaded,
        ImageLoadingFailed
    };
 
public:
 
    explicit DImgPreviewItem(QGraphicsItem* const parent = nullptr);
    ~DImgPreviewItem() override;
 
    void setDisplayingWidget(QWidget* const widget);
    void setPreviewSettings(const PreviewSettings& settings);
 
    QString path()              const;
    void    setPath(const QString& path, bool rePreview = false);
 
    State state()               const;
    bool  isLoaded()            const;
    void  reload();
 
    void setPreloadPaths(const QStringList& pathsToPreload);
 
    QString userLoadingHint()   const override;
 
Q_SIGNALS:
 
    void stateChanged(int state);
    void loaded();
    void loadingFailed();
 
private Q_SLOTS:
 
    void slotGotImagePreview(const LoadingDescription& loadingDescription, const DImg& image);
    void preloadNext();
    void slotFileChanged(const QString& path);
    void iccSettingsChanged(const ICCSettingsContainer& current, const ICCSettingsContainer& previous);
 
private:
 
    // Disable
    DImgPreviewItem(QObject*);
 
    class DImgPreviewItemPrivate;
    Q_DECLARE_PRIVATE(DImgPreviewItem)
 
protected:
 
    explicit DImgPreviewItem(DImgPreviewItemPrivate& dd, QGraphicsItem* const parent = nullptr);
};
 
} // namespace Digikam
 
#endif // DIGIKAM_DIMG_PREVIEW_ITEM_H