qwt_point_mapper.h

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/******************************************************************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/

#ifndef QWT_POINT_MAPPER_H
#define QWT_POINT_MAPPER_H

#include "qwt_global.h"

class QwtScaleMap;
template< typename T > class QwtSeriesData;
class QPolygonF;
class QPointF;
class QRectF;
class QPolygon;
class QPen;
class QImage;

class QWT_EXPORT QwtPointMapper
{
  public:
    enum TransformationFlag
    {
        RoundPoints = 0x01,

        WeedOutPoints = 0x02,

        WeedOutIntermediatePoints = 0x04
    };

    Q_DECLARE_FLAGS( TransformationFlags, TransformationFlag )

    QwtPointMapper();
    ~QwtPointMapper();

    void setFlags( TransformationFlags );
    TransformationFlags flags() const;

    void setFlag( TransformationFlag, bool on = true );
    bool testFlag( TransformationFlag ) const;

    void setBoundingRect( const QRectF& );
    QRectF boundingRect() const;

    QPolygonF toPolygonF( const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QwtSeriesData< QPointF >* series, int from, int to ) const;

    QPolygon toPolygon( const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QwtSeriesData< QPointF >* series, int from, int to ) const;

    QPolygon toPoints( const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QwtSeriesData< QPointF >* series, int from, int to ) const;

    QPolygonF toPointsF( const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QwtSeriesData< QPointF >* series, int from, int to ) const;

    QImage toImage( const QwtScaleMap& xMap, const QwtScaleMap& yMap,
        const QwtSeriesData< QPointF >* series, int from, int to,
        const QPen&, bool antialiased, uint numThreads ) const;

  private:
    Q_DISABLE_COPY(QwtPointMapper)

    class PrivateData;
    PrivateData* m_data;
};

Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPointMapper::TransformationFlags )

#endif