QwtCurveFitter Class Reference

Abstract base class for a curve fitter. More...

#include <qwt_curve_fitter.h>

Inheritance diagram for QwtCurveFitter:

Public Types
enum	Mode { Polygon , Path }
	Preferred mode of the fitting algorithm. More...

Public Member Functions
virtual	~QwtCurveFitter ()
	Destructor.
Mode	mode () const
virtual QPolygonF	fitCurve (const QPolygonF &polygon) const =0
	Find a curve which has the best fit to a series of data points.
virtual QPainterPath	fitCurvePath (const QPolygonF &polygon) const =0
	Find a curve path which has the best fit to a series of data points.

Protected Member Functions
	QwtCurveFitter (Mode mode)
	Constructor.

Detailed Description

Abstract base class for a curve fitter.

Member Enumeration Documentation

Mode

enum QwtCurveFitter::Mode

Preferred mode of the fitting algorithm.

Even if a QPainterPath can always be created from a QPolygonF the overhead of the conversion can be avoided by indicating the preference of the implementation to the application code.

Enumerator
Polygon	The fitting algorithm creates a polygon - the implementation of fitCurvePath() simply wraps the polygon into a path. See also QwtWeedingCurveFitter
Path	The fitting algorithm creates a painter path - the implementation of fitCurve() extracts a polygon from the path. See also QwtSplineCurveFitter

Constructor & Destructor Documentation

QwtCurveFitter()

QwtCurveFitter::QwtCurveFitter ( Mode  mode )

explicitprotected

Constructor.

Parameters

mode	Preferred fitting mode

Member Function Documentation

fitCurve()

virtual QPolygonF QwtCurveFitter::fitCurve ( const QPolygonF &  polygon ) const

pure virtual

Find a curve which has the best fit to a series of data points.

Parameters

polygon

Series of data points

Returns

Curve points

See also

fitCurvePath()

Implemented in QwtPolarFitter, QwtSplineCurveFitter, and QwtWeedingCurveFitter.

fitCurvePath()

virtual QPainterPath QwtCurveFitter::fitCurvePath ( const QPolygonF &  polygon ) const

pure virtual

Find a curve path which has the best fit to a series of data points.

Parameters

polygon

Series of data points

Returns

Curve path

See also

fitCurve()

Implemented in QwtPolarFitter, QwtSplineCurveFitter, and QwtWeedingCurveFitter.

mode()

QwtCurveFitter::Mode QwtCurveFitter::mode

(

)

const

Returns

Preferred fitting mode

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The documentation for this class was generated from the following files:

• /home/runner/work/QWT/QWT/src/qwt_curve_fitter.h
• /home/runner/work/QWT/QWT/src/qwt_curve_fitter.cpp