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
virtual QPainterPath	fitCurvePath (const QPolygonF &polygon) const =0

Protected Member Functions
	QwtCurveFitter (Mode mode)

Detailed Description

Abstract base class for a curve fitter.

Definition at line 21 of file qwt_curve_fitter.h.

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

Definition at line 32 of file qwt_curve_fitter.h.

Constructor & Destructor Documentation

~QwtCurveFitter()

QwtCurveFitter::~QwtCurveFitter ( )

virtual

Destructor.

Definition at line 22 of file qwt_curve_fitter.cpp.

QwtCurveFitter()

QwtCurveFitter::QwtCurveFitter ( Mode mode )

explicitprotected

Constructor

Parameters

mode	Preferred fitting mode

Definition at line 16 of file qwt_curve_fitter.cpp.

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

Definition at line 27 of file qwt_curve_fitter.cpp.