QwtCurveFitter - Abstract base class for a curve fitter.

NAME  SYNOPSIS  Public Types  Public Member Functions  Protected Member Functions  Detailed Description  Member Enumeration Documentation  enum QwtCurveFitter::Mode  Constructor & Destructor Documentation  QwtCurveFitter::˜QwtCurveFitter () [virtual]  QwtCurveFitter::QwtCurveFitter (Mode mode) [explicit], [protected]  Member Function Documentation  virtual QPolygonF QwtCurveFitter::fitCurve (const QPolygonF & polygon)const [pure virtual]  virtual QPainterPath QwtCurveFitter::fitCurvePath (const QPolygonF &polygon) const [pure virtual]  QwtCurveFitter::Mode QwtCurveFitter::mode () const  Author 

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NAME

QwtCurveFitter − Abstract base class for a curve fitter.

SYNOPSIS

#include <qwt_curve_fitter.h>

Inherited by QwtPolarFitter, QwtSplineCurveFitter, and QwtWeedingCurveFitter.

Public Types

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

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

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 () [virtual]

Destructor.

Definition at line 22 of file qwt_curve_fitter.cpp.

QwtCurveFitter::QwtCurveFitter (Mode mode) [explicit], [protected]

Constructor

Parameters

mode Preferred fitting mode

Definition at line 16 of file qwt_curve_fitter.cpp.

Member Function Documentation

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.

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.

QwtCurveFitter::Mode QwtCurveFitter::mode () const

Returns

Preferred fitting mode

Definition at line 27 of file qwt_curve_fitter.cpp.

Author

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