// vim: set tabstop=4 shiftwidth=4 noexpandtab:
/*
Gwenview: an image viewer
Copyright 2008 Aurélien Gâteau <agateau@kde.org>

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
of the License, 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.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Cambridge, MA 02110-1301, USA.

*/
#ifndef SEMANTICINFODIRMODEL_H
#define SEMANTICINFODIRMODEL_H

// Qt

// KDE
#include <kdirmodel.h>

// Local

class KUrl;

namespace Gwenview {


class AbstractSemanticInfoBackEnd;
struct SemanticInfo;
struct SemanticInfoDirModelPrivate;
/**
 * Extends KDirModel by providing read/write access to image metadata such as
 * rating, tags and descriptions.
 */
class SemanticInfoDirModel : public KDirModel {
	Q_OBJECT
public:
	enum {
		RatingRole = 0x21a43a51,
		DescriptionRole = 0x26FB33FA,
		TagsRole = 0x0462F0A8
	};
	SemanticInfoDirModel(QObject* parent);
	~SemanticInfoDirModel();

	void clearSemanticInfoCache();

	bool semanticInfoAvailableForIndex(const QModelIndex&) const;

	void retrieveSemanticInfoForIndex(const QModelIndex&);

	SemanticInfo semanticInfoForIndex(const QModelIndex&) const;

	virtual QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const;

	bool setData(const QModelIndex& index, const QVariant& data, int role = Qt::EditRole);

	AbstractSemanticInfoBackEnd* semanticInfoBackEnd() const;

Q_SIGNALS:
	void semanticInfoRetrieved(const KUrl&, const SemanticInfo&);

private:
	SemanticInfoDirModelPrivate* const d;

private Q_SLOTS:
	void slotSemanticInfoRetrieved(const KUrl& url, const SemanticInfo&);

	void slotRowsAboutToBeRemoved(const QModelIndex&, int, int);
	void slotModelAboutToBeReset();
};


} // namespace

#endif /* SEMANTICINFODIRMODEL_H */
