QwtPowerTransform Class Reference

A transformation using pow() More...

#include <qwt_transform.h>

Inheritance diagram for QwtPowerTransform:

Public Member Functions
virtual QwtTransform *	copy () const
virtual double	invTransform (double value) const
	QwtPowerTransform (double exponent)
virtual double	transform (double value) const
virtual	~QwtPowerTransform ()
	Destructor. More...
Public Member Functions inherited from QwtTransform
virtual double	bounded (double value) const
	QwtTransform ()
	Constructor. More...
virtual	~QwtTransform ()
	Destructor. More...

Private Attributes
const double	d_exponent

Detailed Description

A transformation using pow()

QwtPowerTransform preserves the sign of a value. F.e. a transformation with a factor of 2 transforms a value of -3 to -9 and v.v. Thus QwtPowerTransform can be used for scales including negative values.

Definition at line 125 of file qwt_transform.h.

Constructor & Destructor Documentation

QwtPowerTransform::QwtPowerTransform ( double  exponent )

explicit

Constructor

Parameters

exponent

Exponent

Definition at line 125 of file qwt_transform.cpp.

QwtPowerTransform::~QwtPowerTransform ( )

virtual

Destructor.

Definition at line 132 of file qwt_transform.cpp.

Member Function Documentation

QwtTransform * QwtPowerTransform::copy ( ) const

virtual

Returns

Clone of the transformation

Implements QwtTransform.

Definition at line 162 of file qwt_transform.cpp.

double QwtPowerTransform::invTransform ( double  value ) const

virtual

Parameters

value

Value to be transformed

Returns

Inverse exponentiation preserving the sign

Implements QwtTransform.

Definition at line 153 of file qwt_transform.cpp.

double QwtPowerTransform::transform ( double  value ) const

virtual

Parameters

value

Value to be transformed

Returns

Exponentiation preserving the sign

Implements QwtTransform.

Definition at line 140 of file qwt_transform.cpp.

Member Data Documentation

const double QwtPowerTransform::d_exponent

private

Definition at line 137 of file qwt_transform.h.

---

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

• qwt_transform.h
• qwt_transform.cpp