ReverseMapper.h

/*
 * Copyright (C) 2001-2015 Klaralvdalens Datakonsult AB.  All rights reserved.
 *
 * This file is part of the KD Chart library.
 *
 * 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, see <https://www.gnu.org/licenses/>.
 */

#ifndef REVERSEMAPPER_H
#define REVERSEMAPPER_H

#include <QModelIndex>
#include <QHash>

QT_BEGIN_NAMESPACE
class QRectF;
class QGraphicsScene;
class QPolygonF;
QT_END_NAMESPACE

namespace KChart {

    class AbstractDiagram;
    class ChartGraphicsItem;

    class ReverseMapper
    {

    public:
        ReverseMapper();
        explicit ReverseMapper( AbstractDiagram* diagram );

        ~ReverseMapper();

        void setDiagram( AbstractDiagram* diagram );

        void clear();

        QModelIndexList indexesAt( const QPointF& point ) const;
        QModelIndexList indexesIn( const QRect& rect ) const;

        QPolygonF polygon( int row, int column ) const;
        QRectF boundingRect( int row, int column ) const;

        void addItem( ChartGraphicsItem* item );

        // convenience methods:
        void addPolygon( int row, int column, const QPolygonF& polygon );
        void addRect( int row, int column, const QRectF& rect );
        void addCircle( int row, int column, const QPointF& location, const QSizeF& diameter );
        void addLine( int row, int column, const QPointF& from, const QPointF& to );

    private:
        QGraphicsScene* m_scene;
        AbstractDiagram* m_diagram;
        QHash<QModelIndex, ChartGraphicsItem*> m_itemMap;
    };

}

#endif