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33fc476d89
* require qwt >=6.2 (and fallback to internal 6.3 if system's qwt doesn't suffice) * debian doesn't have qwt for Qt6 and won't have it for trixie
85 lines
2.0 KiB
C++
85 lines
2.0 KiB
C++
/******************************************************************************
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* Qwt Widget Library
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* Copyright (C) 1997 Josef Wilgen
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* Copyright (C) 2002 Uwe Rathmann
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the Qwt License, Version 1.0
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*****************************************************************************/
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#ifndef QWT_CURVE_FITTER_H
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#define QWT_CURVE_FITTER_H
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#include "qwt_global.h"
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class QPainterPath;
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class QPolygonF;
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/*!
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\brief Abstract base class for a curve fitter
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*/
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class QWT_EXPORT QwtCurveFitter
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{
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public:
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/*!
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\brief Preferred mode of the fitting algorithm
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Even if a QPainterPath can always be created from a QPolygonF
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the overhead of the conversion can be avoided by indicating
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the preference of the implementation to the application
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code.
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*/
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enum Mode
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{
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/*!
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The fitting algorithm creates a polygon - the implementation
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of fitCurvePath() simply wraps the polygon into a path.
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\sa QwtWeedingCurveFitter
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*/
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Polygon,
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/*!
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The fitting algorithm creates a painter path - the implementation
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of fitCurve() extracts a polygon from the path.
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\sa QwtSplineCurveFitter
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*/
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Path
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};
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virtual ~QwtCurveFitter();
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Mode mode() const;
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/*!
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Find a curve which has the best fit to a series of data points
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\param polygon Series of data points
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\return Curve points
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\sa fitCurvePath()
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*/
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virtual QPolygonF fitCurve( const QPolygonF& polygon ) const = 0;
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/*!
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Find a curve path which has the best fit to a series of data points
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\param polygon Series of data points
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\return Curve path
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\sa fitCurve()
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*/
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virtual QPainterPath fitCurvePath( const QPolygonF& polygon ) const = 0;
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protected:
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explicit QwtCurveFitter( Mode mode );
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private:
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Q_DISABLE_COPY(QwtCurveFitter)
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const Mode m_mode;
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};
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#endif
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