QwtScaleMap Class Reference

A scale map. More...

#include <qwt_scale_map.h>

Public Member Functions
	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.

Static Public Member Functions
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 Member Functions
void	swap (QwtScaleMap &other) noexcept

Detailed Description

A scale map.

Constructor & Destructor Documentation

QwtScaleMap() [1/2]

QwtScaleMap::QwtScaleMap

(

)

Default constructor.

QwtScaleMap() [2/2]

QwtScaleMap::QwtScaleMap

(

const QwtScaleMap &

other

)

Copy constructor.

Copy constructor .

~QwtScaleMap()

QwtScaleMap::~QwtScaleMap

(

)

Destructor.

Destructor .

Member Function Documentation

invTransform() [1/3]

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

static

Transform a point from paint to scale coordinates.

invTransform() [2/3]

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

static

Transform a rectangle from paint to scale coordinates.

invTransform() [3/3]

double QwtScaleMap::invTransform ( double  p ) const

inline

Transform a paint device coordinate to scale value.

Transform a paint device value into a value in the interval of the scale.

isInverting()

bool QwtScaleMap::isInverting ( ) const

inline

Check if the mapping direction is inverted.

Return true when ( p1() < p2() ) != ( s1() < s2() )

isLinerScale()

bool QwtScaleMap::isLinerScale ( const QwtScaleMap &  sm )

static

Check if the scale is linear (no transformation)

operator=()

QwtScaleMap & QwtScaleMap::operator=

(

const QwtScaleMap &

other

)

Copy assignment operator.

Assignment operator .

p1()

double QwtScaleMap::p1 ( ) const

inline

Return first border of paint interval.

Return first border of the paint interval .

p2()

double QwtScaleMap::p2 ( ) const

inline

Return second border of paint interval.

Return second border of the paint interval .

pDist()

double QwtScaleMap::pDist ( ) const

inline

Return distance between paint interval boundaries.

Return qwtAbs(p2() - p1()) .

s1()

double QwtScaleMap::s1 ( ) const

inline

Return first border of scale interval.

Return first border of the scale interval .

s2()

double QwtScaleMap::s2 ( ) const

inline

Return second border of scale interval.

Return second border of the scale interval .

sDist()

double QwtScaleMap::sDist ( ) const

inline

Return distance between scale interval boundaries.

Return qwtAbs(s2() - s1()) .

setPaintInterval()

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

Set the paint device interval boundaries.

Specify the borders of the paint device interval.

setScaleInterval()

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

Set the scale interval boundaries.

Specify the borders of the scale interval.

setTransformation()

void QwtScaleMap::setTransformation

(

QwtTransform *

transform

)

Set the transformation (takes ownership)

Initialize the map with a transformation.

transform() [1/3]

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

static

Transform a point from scale to paint coordinates.

transform() [2/3]

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

static

Transform a rectangle from scale to paint coordinates.

transform() [3/3]

double QwtScaleMap::transform ( double  s ) const

inline

Transform a scale value to paint device coordinate.

Transform a point related to the scale interval into a point related to the paint device interval.

transformation()

const QwtTransform * QwtScaleMap::transformation

(

)

const

Return the transformation.

Get the transformation.

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

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