QwtScaleMap类 参考

刻度映射 更多...

#include <qwt_scale_map.h>

Public 成员函数
	QwtScaleMap ()
	Default constructor
	QwtScaleMap (const QwtScaleMap &)
	Copy constructor
	QwtScaleMap (QwtScaleMap &&)
	Move constructor
	~QwtScaleMap ()
	Destructor
QwtScaleMap &	operator= (const QwtScaleMap &)
	Copy assignment operator
QwtScaleMap &	operator= (QwtScaleMap &&)
	Move assignment operator
void	setTransformation (QwtTransform *)
	Set the transformation (takes ownership)
const QwtTransform *	transformation () const
	Return the transformation
void	setPaintInterval (double p1, double p2)
	Set the paint device interval boundaries
void	setScaleInterval (double s1, double s2)
	Set the scale interval boundaries
double	transform (double s) const
	Transform a scale value to paint device coordinate
double	invTransform (double p) const
	Transform a paint device coordinate to scale value
double	p1 () const
	Return first border of paint interval
double	p2 () const
	Return second border of paint interval
double	s1 () const
	Return first border of scale interval
double	s2 () const
	Return second border of scale interval
double	pDist () const
	Return distance between paint interval boundaries
double	sDist () const
	Return distance between scale interval boundaries
bool	isInverting () const
	Check if the mapping direction is inverted

静态 Public 成员函数
static QRectF	transform (const QwtScaleMap &, const QwtScaleMap &, const QRectF &)
	Transform a rectangle from scale to paint coordinates
static QRectF	invTransform (const QwtScaleMap &, const QwtScaleMap &, const QRectF &)
	Transform a rectangle from paint to scale coordinates
static QPointF	transform (const QwtScaleMap &, const QwtScaleMap &, const QPointF &)
	Transform a point from scale to paint coordinates
static QPointF	invTransform (const QwtScaleMap &, const QwtScaleMap &, const QPointF &)
	Transform a point from paint to scale coordinates
static bool	isLinerScale (const QwtScaleMap &sm)
	Check if the scale is linear (no transformation)

Protected 成员函数
void	swap (QwtScaleMap &other) noexcept

详细描述

刻度映射

构造及析构函数说明

QwtScaleMap() [1/2]

QwtScaleMap::QwtScaleMap

(

)

Default constructor

默认构造函数

QwtScaleMap() [2/2]

QwtScaleMap::QwtScaleMap

(

const QwtScaleMap &

other

)

Copy constructor

复制构造函数

~QwtScaleMap()

QwtScaleMap::~QwtScaleMap

(

)

Destructor

析构函数

成员函数说明

invTransform() [1/3]

QPointF QwtScaleMap::invTransform ( const QwtScaleMap &  xMap, const QwtScaleMap &  yMap, const QPointF &  pos  )

static

Transform a point from paint to scale coordinates

将点从绘制坐标转换为刻度坐标

invTransform() [2/3]

QRectF QwtScaleMap::invTransform ( const QwtScaleMap &  xMap, const QwtScaleMap &  yMap, const QRectF &  rect  )

static

Transform a rectangle from paint to scale coordinates

将矩形从绘制坐标转换为刻度坐标

invTransform() [3/3]

double QwtScaleMap::invTransform ( double  p ) const

inline

Transform a paint device coordinate to scale value

将绘制设备值转换为刻度区间中的值

isInverting()

bool QwtScaleMap::isInverting ( ) const

inline

Check if the mapping direction is inverted

当 ( p1() < p2() ) != ( s1() < s2() ) 时返回 true

isLinerScale()

bool QwtScaleMap::isLinerScale ( const QwtScaleMap &  sm )

static

Check if the scale is linear (no transformation)

检查刻度是否为线性（无变换）

operator=()

QwtScaleMap & QwtScaleMap::operator=

(

const QwtScaleMap &

other

)

Copy assignment operator

赋值运算符

p1()

double QwtScaleMap::p1 ( ) const

inline

Return first border of paint interval

返回绘制区间的第一个边界

p2()

double QwtScaleMap::p2 ( ) const

inline

Return second border of paint interval

返回绘制区间的第二个边界

pDist()

double QwtScaleMap::pDist ( ) const

inline

Return distance between paint interval boundaries

返回 qwtAbs(p2() - p1())

s1()

double QwtScaleMap::s1 ( ) const

inline

Return first border of scale interval

返回刻度区间的第一个边界

s2()

double QwtScaleMap::s2 ( ) const

inline

Return second border of scale interval

返回刻度区间的第二个边界

sDist()

double QwtScaleMap::sDist ( ) const

inline

Return distance between scale interval boundaries

返回 qwtAbs(s2() - s1())

setPaintInterval()

void QwtScaleMap::setPaintInterval	(	double	p1,
		double	p2
	)

Set the paint device interval boundaries

指定绘制设备区间的边界

setScaleInterval()

void QwtScaleMap::setScaleInterval	(	double	s1,
		double	s2
	)

Set the scale interval boundaries

指定刻度区间的边界

setTransformation()

void QwtScaleMap::setTransformation

(

QwtTransform *

transform

)

Set the transformation (takes ownership)

使用变换初始化映射

transform() [1/3]

QPointF QwtScaleMap::transform ( const QwtScaleMap &  xMap, const QwtScaleMap &  yMap, const QPointF &  pos  )

static

Transform a point from scale to paint coordinates

将点从刻度坐标转换为绘制坐标

transform() [2/3]

QRectF QwtScaleMap::transform ( const QwtScaleMap &  xMap, const QwtScaleMap &  yMap, const QRectF &  rect  )

static

Transform a rectangle from scale to paint coordinates

将矩形从刻度坐标转换为绘制坐标

transform() [3/3]

double QwtScaleMap::transform ( double  s ) const

inline

Transform a scale value to paint device coordinate

将相对于刻度区间的点转换为相对于绘制设备区间的点

transformation()

const QwtTransform * QwtScaleMap::transformation

(

)

const

Return the transformation

获取变换

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该类的文档由以下文件生成:

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