ReverseMapper.h

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/* -*- Mode: C++ -*-
   KDChart - a multi-platform charting engine
   */

/****************************************************************************
 ** Copyright (C) 2005-2007 Klarälvdalens Datakonsult AB.  All rights reserved.
 **
 ** This file is part of the KD Chart library.
 **
 ** This file may be distributed and/or modified under the terms of the
 ** GNU General Public License version 2 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.
 **
 ** Licensees holding valid commercial KD Chart licenses may use this file in
 ** accordance with the KD Chart Commercial License Agreement provided with
 ** the Software.
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ** See http://www.kdab.net/kdchart for
 **   information about KD Chart Commercial License Agreements.
 **
 ** Contact info@kdab.net if any conditions of this
 ** licensing are not clear to you.
 **
 **********************************************************************/

#ifndef REVERSEMAPPER_H
#define REVERSEMAPPER_H

#include <QModelIndex>
#include <QHash>

class QRectF;
class QGraphicsScene;
class QPolygonF;

namespace KDChart {

    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

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