/* ============================================================
 *
 * This file is a part of kipi-plugins project
 * http://www.digikam.org
 *
 * Date        : 2011-09-01
 * Description : a plugin to create photo layouts by fusion of several images.
 * Acknowledge : based on the expoblending plugin
 *
 * Copyright (C) 2011 by Łukasz Spas <lukasz dot spas at gmail dot com>
 * Copyright (C) 2009-2011 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 LAYERSMODEL_H
#define LAYERSMODEL_H

// Qt
#include <QObject>
#include <QModelIndex>
#include <QAbstractItemModel>

namespace KIPIPhotoLayoutsEditor
{
    class LayersModelItem;
    class AbstractPhoto;

    class LayersModel : public QAbstractItemModel
    {
            Q_OBJECT

        public:

            enum ModelRoles
            {
                VisibilityIcon = Qt::UserRole,
                LockIcon,
                GraphicItem
            };

        public:

            explicit LayersModel(QObject* parent = 0);
            virtual ~LayersModel();

            QModelIndex index( int row, int column, const QModelIndex& parent ) const;
            QModelIndex parent( const QModelIndex& index ) const;
            int rowCount( const QModelIndex& parent = QModelIndex()) const;
            int columnCount( const QModelIndex& parent = QModelIndex()) const;
            QVariant data( const QModelIndex&, int role ) const;
            bool setData(const QModelIndex& index, const QVariant& value, int role);
            Qt::ItemFlags flags(const QModelIndex& index = QModelIndex()) const;
            QVariant headerData(int section, Qt::Orientation orientation, int role) const;
            bool appendItem(AbstractPhoto* item, const QModelIndex& parent = QModelIndex());
            bool insertItem(AbstractPhoto* item, int position, const QModelIndex& parent = QModelIndex());
            bool prependItem(AbstractPhoto* item, const QModelIndex& parent = QModelIndex());
            bool appendItems(const QList<AbstractPhoto*>& items, const QModelIndex& parent);
            bool insertItems(const QList<AbstractPhoto*>& items, int position, const QModelIndex& parent = QModelIndex());
            bool prependItems(const QList<AbstractPhoto*>& items, const QModelIndex& parent);
            QModelIndexList itemsToIndexes(const QList<AbstractPhoto*> & items) const;
            QList<AbstractPhoto*> indexesToItems(const QModelIndexList& indexes) const;
            QModelIndex findIndex(AbstractPhoto* item, const QModelIndex& parent = QModelIndex()) const;
            QModelIndex findIndex(LayersModelItem* item, const QModelIndex& parent = QModelIndex()) const;
            bool insertRows(int row, int count, const QModelIndex& parent);
            LayersModelItem* getItem(const QModelIndex& index) const;
            bool removeRows(int row, int count, const QModelIndex& parent = QModelIndex());
            bool moveRows(int sourcePosition, const QModelIndex& sourceParent, int destPosition, const QModelIndex& destinationParent);
            bool moveRows(const QModelIndex& sourceIndex, const QModelIndex& sourdeParent, const QModelIndex& destinationIndex, const QModelIndex& destinationParent);
            bool moveRows(int sourcePosition, int sourceCount, const QModelIndex& sourceParent, int destPosition, const QModelIndex& destinationParent);
            bool moveRows(const QModelIndex& start1, const QModelIndex& end1, const QModelIndex& parent1, const QModelIndex& start2, const QModelIndex& parent2);
            void updateModel(const QModelIndex& topLeft, const QModelIndex& bottomRight);

        Q_SIGNALS:

            void rowsInserted(const QModelIndex& parent, int first, int last);

        private:

            LayersModelItem* root;
    };
}

#endif // LAYERSMODEL_H
