QwtLogScaleEngine类 参考

对数刻度引擎 更多...

#include <qwt_scale_engine.h>

类 QwtLogScaleEngine 继承关系图:

Public 成员函数
	QwtLogScaleEngine (uint base=10)
	构造函数
virtual	~QwtLogScaleEngine ()
	Destructor
virtual void	autoScale (int maxNumSteps, double &x1, double &x2, double &stepSize) const override
	对齐并划分区间
virtual QwtScaleDiv	divideScale (double x1, double x2, int maxMajorSteps, int maxMinorSteps, double stepSize=0.0) const override
	计算区间的刻度划分
Public 成员函数 继承自 QwtScaleEngine
	QwtScaleEngine (uint base=10)
	构造函数
virtual	~QwtScaleEngine ()
	Destructor
void	setBase (uint base)
	Set the base
uint	base () const
	返回刻度引擎的基数
void	setAttribute (Attribute, bool on=true)
	Set an attribute
bool	testAttribute (Attribute) const
	测试属性是否启用
void	setAttributes (Attributes)
	Set attributes
Attributes	attributes () const
	返回刻度属性
void	setReference (double)
	Set the reference value
double	reference () const
	返回参考值
void	setMargins (double lower, double upper)
	Set the margins
double	lowerMargin () const
	返回刻度下端的边距
double	upperMargin () const
	返回刻度上端的边距
void	setTransformation (QwtTransform *)
	Set the transformation
QwtTransform *	transformation () const
	创建并返回引擎变换的克隆

Protected 成员函数
QwtInterval	align (const QwtInterval &, double stepSize) const
	将区间对齐到步长
void	buildTicks (const QwtInterval &, double stepSize, int maxMinorSteps, QList< double > ticks[QwtScaleDiv::NTickTypes]) const
	计算区间的刻度
QList< double >	buildMajorTicks (const QwtInterval &interval, double stepSize) const
	计算区间的主刻度
void	buildMinorTicks (const QList< double > &majorTicks, int maxMinorSteps, double stepSize, QList< double > &minorTicks, QList< double > &mediumTicks) const
	计算主刻度的次刻度/中刻度
Protected 成员函数 继承自 QwtScaleEngine
bool	contains (const QwtInterval &, double value) const
	Check if an interval contains a value
QList< double >	strip (const QList< double > &, const QwtInterval &) const
	Strip values outside an interval
double	divideInterval (double intervalSize, int numSteps) const
	Divide an interval
QwtInterval	buildInterval (double value) const
	Build an interval around a value

额外继承的成员函数
Public 类型 继承自 QwtScaleEngine
enum	Attribute {   NoAttribute = 0x00 , IncludeReference = 0x01 , Symmetric = 0x02 , Floating = 0x04 ,   Inverted = 0x08 }
	布局属性 更多...

详细描述

对数刻度引擎

构造及析构函数说明

QwtLogScaleEngine()

QwtLogScaleEngine::QwtLogScaleEngine ( uint  base = 10 )

explicit

构造函数

成员函数说明

align()

QwtInterval QwtLogScaleEngine::align ( const QwtInterval &  interval, double  stepSize  ) const

protected

将区间对齐到步长

autoScale()

void QwtLogScaleEngine::autoScale ( int  maxNumSteps, double &  x1, double &  x2, double &  stepSize  ) const

overridevirtual

对齐并划分区间

实现了 QwtScaleEngine.

buildMajorTicks()

QList< double > QwtLogScaleEngine::buildMajorTicks ( const QwtInterval &  interval, double  stepSize  ) const

protected

计算区间的主刻度

buildMinorTicks()

void QwtLogScaleEngine::buildMinorTicks ( const QList< double > &  majorTicks, int  maxMinorSteps, double  stepSize, QList< double > &  minorTicks, QList< double > &  mediumTicks  ) const

protected

计算主刻度的次刻度/中刻度

buildTicks()

void QwtLogScaleEngine::buildTicks ( const QwtInterval &  interval, double  stepSize, int  maxMinorSteps, QList< double >  ticks[QwtScaleDiv::NTickTypes]  ) const

protected

计算区间的刻度

divideScale()

QwtScaleDiv QwtLogScaleEngine::divideScale ( double  x1, double  x2, int  maxMajorSteps, int  maxMinorSteps, double  stepSize = 0.0  ) const

overridevirtual

计算区间的刻度划分

实现了 QwtScaleEngine.

---

该类的文档由以下文件生成:

• /home/runner/work/QWT/QWT/src/plot/qwt_scale_engine.h
• /home/runner/work/QWT/QWT/src/plot/qwt_scale_engine.cpp