ReverseMapper.h

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/****************************************************************************
**
** This file is part of the KD Chart library.
**
** SPDX-FileCopyrightText: 2001 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
**
** SPDX-License-Identifier: MIT
**
****************************************************************************/
 
#ifndef REVERSEMAPPER_H
#define REVERSEMAPPER_H
 
#include <QHash>
#include <QModelIndex>
 
QT_BEGIN_NAMESPACE
class QRectF;
class QGraphicsScene;
class QPolygonF;
QT_END_NAMESPACE
 
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 = nullptr;
    AbstractDiagram *m_diagram = nullptr;
    QHash<QModelIndex, ChartGraphicsItem *> m_itemMap;
};
}
 
#endif