QwtAbstractScale Class Reference

An abstract base class for widgets having a scale. More...

#include <qwt_abstract_scale.h>

Inheritance diagram for QwtAbstractScale:

Classes
class	PrivateData

Public Member Functions
	QwtAbstractScale (QWidget *parent=nullptr)
	Constructor for QwtAbstractScale.
virtual	~QwtAbstractScale ()
	Destructor for QwtAbstractScale .
void	setScale (double lowerBound, double upperBound)
	Specify a scale by interval bounds.
void	setScale (const QwtInterval &)
	Specify a scale by interval.
void	setScale (const QwtScaleDiv &)
	Specify a scale by scale division.
const QwtScaleDiv &	scaleDiv () const
	Return the scale division.
void	setLowerBound (double value)
	Set the lower bound of the scale.
double	lowerBound () const
	Return the lower bound of the scale.
void	setUpperBound (double value)
	Set the upper bound of the scale.
double	upperBound () const
	Return the upper bound of the scale.
void	setScaleStepSize (double stepSize)
	Set the step size used for calculating scale division.
double	scaleStepSize () const
	Return the step size hint.
void	setScaleMaxMajor (int ticks)
	Set the maximum number of major tick intervals.
int	scaleMaxMinor () const
	Return the maximum number of minor tick intervals.
void	setScaleMaxMinor (int ticks)
	Set the maximum number of minor tick intervals.
int	scaleMaxMajor () const
	Return the maximum number of major tick intervals.
void	setScaleEngine (QwtScaleEngine *)
	Set the scale engine.
const QwtScaleEngine *	scaleEngine () const
	Return the scale engine (const version)
QwtScaleEngine *	scaleEngine ()
	Return the scale engine (non-const version)
int	transform (double) const
	Transform a scale value to widget coordinates.
double	invTransform (int) const
	Transform a widget coordinate to scale value.
bool	isInverted () const
	Check if scale is inverted.
double	minimum () const
	Return the minimum boundary.
double	maximum () const
	Return the maximum boundary.
const QwtScaleMap &	scaleMap () const
	Return the scale map.

Protected Member Functions
virtual void	changeEvent (QEvent *) override
	Handle change events (English only)
void	rescale (double lowerBound, double upperBound, double stepSize)
	Recalculate scale and update scale draw (English only)
void	setAbstractScaleDraw (QwtAbstractScaleDraw *)
	Set the scale draw object (English only)
const QwtAbstractScaleDraw *	abstractScaleDraw () const
	Return the scale draw (const version) (English only)
QwtAbstractScaleDraw *	abstractScaleDraw ()
	Return the scale draw (non-const version) (English only)
void	updateScaleDraw ()
	Update the scale draw (English only)
virtual void	scaleChange ()
	Notify about scale changes (English only)

Properties
double	lowerBound
double	upperBound
int	scaleMaxMajor
int	scaleMaxMinor
double	scaleStepSize

Detailed Description

An abstract base class for widgets having a scale.

Constructor & Destructor Documentation

QwtAbstractScale()

QwtAbstractScale::QwtAbstractScale ( QWidget *  parent = nullptr )

explicit

Constructor for QwtAbstractScale.

~QwtAbstractScale()

QwtAbstractScale::~QwtAbstractScale ( )

virtual

Destructor for QwtAbstractScale .

Member Function Documentation

abstractScaleDraw() [1/2]

QwtAbstractScaleDraw * QwtAbstractScale::abstractScaleDraw ( )

protected

Return the scale draw (non-const version) (English only)

Return the scale draw object (non-const)

abstractScaleDraw() [2/2]

const QwtAbstractScaleDraw * QwtAbstractScale::abstractScaleDraw ( ) const

protected

Return the scale draw (const version) (English only)

Return the scale draw object (const)

changeEvent()

void QwtAbstractScale::changeEvent ( QEvent *  event )

overrideprotectedvirtual

Handle change events (English only)

Handle change events.

Reimplemented in QwtDial, QwtKnob, QwtSlider, and QwtThermo.

invTransform()

double QwtAbstractScale::invTransform

(

int

value

)

const

Transform a widget coordinate to scale value.

isInverted()

bool QwtAbstractScale::isInverted

(

)

const

Check if scale is inverted.

lowerBound()

double QwtAbstractScale::lowerBound

(

)

const

Return the lower bound of the scale.

maximum()

double QwtAbstractScale::maximum

(

)

const

Return the maximum boundary.

minimum()

double QwtAbstractScale::minimum

(

)

const

Return the minimum boundary.

rescale()

void QwtAbstractScale::rescale ( double  lowerBound, double  upperBound, double  stepSize  )

protected

Recalculate scale and update scale draw (English only)

Recalculate scale division and update scale.

scaleChange()

void QwtAbstractScale::scaleChange ( )

protectedvirtual

Notify about scale changes (English only)

Notify about scale changes.

Reimplemented in QwtAbstractSlider, QwtDial, QwtSlider, and QwtThermo.

scaleDiv()

const QwtScaleDiv & QwtAbstractScale::scaleDiv

(

)

const

Return the scale division.

scaleEngine() [1/2]

QwtScaleEngine * QwtAbstractScale::scaleEngine

(

)

Return the scale engine (non-const version)

scaleEngine() [2/2]

const QwtScaleEngine * QwtAbstractScale::scaleEngine

(

)

const

Return the scale engine (const version)

scaleMap()

const QwtScaleMap & QwtAbstractScale::scaleMap

(

)

const

Return the scale map.

scaleMaxMajor()

int QwtAbstractScale::scaleMaxMajor

(

)

const

Return the maximum number of major tick intervals.

scaleMaxMinor()

int QwtAbstractScale::scaleMaxMinor

(

)

const

Return the maximum number of minor tick intervals.

scaleStepSize()

double QwtAbstractScale::scaleStepSize

(

)

const

Return the step size hint.

setAbstractScaleDraw()

void QwtAbstractScale::setAbstractScaleDraw ( QwtAbstractScaleDraw *  scaleDraw )

protected

Set the scale draw object (English only)

Set the scale draw object.

setLowerBound()

void QwtAbstractScale::setLowerBound

(

double

value

)

Set the lower bound of the scale.

setScale() [1/3]

void QwtAbstractScale::setScale

(

const QwtInterval &

interval

)

Specify a scale by interval.

setScale() [2/3]

void QwtAbstractScale::setScale

(

const QwtScaleDiv &

scaleDiv

)

Specify a scale by scale division.

setScale() [3/3]

void QwtAbstractScale::setScale	(	double	lowerBound,
		double	upperBound
	)

Specify a scale by interval bounds.

setScaleEngine()

void QwtAbstractScale::setScaleEngine

(

QwtScaleEngine *

scaleEngine

)

Set the scale engine.

setScaleMaxMajor()

void QwtAbstractScale::setScaleMaxMajor

(

int

ticks

)

Set the maximum number of major tick intervals.

setScaleMaxMinor()

void QwtAbstractScale::setScaleMaxMinor

(

int

ticks

)

Set the maximum number of minor tick intervals.

setScaleStepSize()

void QwtAbstractScale::setScaleStepSize

(

double

stepSize

)

Set the step size used for calculating scale division.

setUpperBound()

void QwtAbstractScale::setUpperBound

(

double

value

)

Set the upper bound of the scale.

transform()

int QwtAbstractScale::transform

(

double

value

)

const

Transform a scale value to widget coordinates.

updateScaleDraw()

void QwtAbstractScale::updateScaleDraw ( )

protected

Update the scale draw (English only)

Recalculate ticks and scale boundaries.

upperBound()

double QwtAbstractScale::upperBound

(

)

const

Return the upper bound of the scale.

---

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

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