qwt_curve_fitter.h

/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * 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_CURVE_FITTER_H
#define QWT_CURVE_FITTER_H

#include "qwt_global.h"
#include <qpolygon.h>
#include <qrect.h>

class QwtSpline;

class QWT_EXPORT QwtCurveFitter
{
public:
    virtual ~QwtCurveFitter();

    virtual QPolygonF fitCurve( const QPolygonF &polygon ) const = 0;

protected:
    QwtCurveFitter();

private:
    QwtCurveFitter( const QwtCurveFitter & );
    QwtCurveFitter &operator=( const QwtCurveFitter & );
};

class QWT_EXPORT QwtSplineCurveFitter: public QwtCurveFitter
{
public:
    enum FitMode
    {
        Auto,

        Spline,

        ParametricSpline
    };

    QwtSplineCurveFitter();
    virtual ~QwtSplineCurveFitter();

    void setFitMode( FitMode );
    FitMode fitMode() const;

    void setSpline( const QwtSpline& );
    const QwtSpline &spline() const;
    QwtSpline &spline();

    void setSplineSize( int size );
    int splineSize() const;

    virtual QPolygonF fitCurve( const QPolygonF & ) const;

private:
    QPolygonF fitSpline( const QPolygonF & ) const;
    QPolygonF fitParametric( const QPolygonF & ) const;

    class PrivateData;
    PrivateData *d_data;
};

class QWT_EXPORT QwtWeedingCurveFitter: public QwtCurveFitter
{
public:
    QwtWeedingCurveFitter( double tolerance = 1.0 );
    virtual ~QwtWeedingCurveFitter();

    void setTolerance( double );
    double tolerance() const;

    virtual QPolygonF fitCurve( const QPolygonF & ) const;

private:
    class Line;

    class PrivateData;
    PrivateData *d_data;
};

#endif