QwtPowerTransform类 参考

A transformation using pow() 更多...

#include <qwt_transform.h>

类 QwtPowerTransform 继承关系图:

Public 成员函数
	QwtPowerTransform (double exponent)
	Constructor with exponent parameter
	~QwtPowerTransform () override
	Destructor
virtual double	transform (double value) const override
	Transformation function - pow() preserving sign
virtual double	invTransform (double value) const override
	Inverse transformation function - inverse pow() preserving sign
virtual QwtTransform *	copy () const override
	Clone of the transformation
Public 成员函数 继承自 QwtTransform
	QwtTransform ()
	Constructor
virtual	~QwtTransform ()
	Destructor
virtual double	bounded (double value) const
	Modify value to be a valid value for the transformation

详细描述

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.

构造及析构函数说明

QwtPowerTransform()

QwtPowerTransform::QwtPowerTransform ( double  exponent )

explicit

Constructor with exponent parameter

Constructor

参数

exponent

Exponent

成员函数说明

copy()

QwtTransform * QwtPowerTransform::copy ( ) const

overridevirtual

Clone of the transformation

返回

New QwtPowerTransform instance

实现了 QwtTransform.

invTransform()

double QwtPowerTransform::invTransform ( double  value ) const

overridevirtual

Inverse transformation function - inverse pow() preserving sign

Inverse transform function

参数

value

Value to be transformed

返回

Inverse exponentiation preserving the sign

实现了 QwtTransform.

transform()

double QwtPowerTransform::transform ( double  value ) const

overridevirtual

Transformation function - pow() preserving sign

Transform function

参数

value

Value to be transformed

返回

Exponentiation preserving the sign

实现了 QwtTransform.

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该类的文档由以下文件生成:

• /home/runner/work/QWT/QWT/src/core/qwt_transform.h
• /home/runner/work/QWT/QWT/src/core/qwt_transform.cpp