QwtScaleDiv Class Reference

A class representing a scale division/表示刻度划分的类 More...

#include <qwt_scale_div.h>

Public Types
enum	TickType {   NoTick = -1 , MinorTick , MediumTick , MajorTick ,   NTickTypes }
	Scale tick types. More...

Public Member Functions
	QwtScaleDiv (double lowerBound=0.0, double upperBound=0.0)
	Construct a division without ticks.
	QwtScaleDiv (const QwtInterval &, QList< double >[NTickTypes])
	Construct a scale division.
	QwtScaleDiv (double lowerBound, double upperBound, QList< double >[NTickTypes])
	Construct a scale division.
	QwtScaleDiv (double lowerBound, double upperBound, const QList< double > &minorTicks, const QList< double > &mediumTicks, const QList< double > &majorTicks)
	Construct a scale division.
bool	operator== (const QwtScaleDiv &) const
	Equality operator.
bool	operator!= (const QwtScaleDiv &) const
	Inequality operator.
bool	fuzzyCompare (const QwtScaleDiv &other) const
	Fuzzy comparison.
void	setInterval (double lowerBound, double upperBound)
	Change the interval.
void	setInterval (const QwtInterval &)
	Change the interval.
QwtInterval	interval () const
	Get the interval from lowerBound to upperBound.
void	setLowerBound (double)
	Set the first boundary.
double	lowerBound () const
	Get the first boundary.
void	setUpperBound (double)
	Set the second boundary.
double	upperBound () const
	Get the upper bound.
double	range () const
	Get the range (upperBound - lowerBound)
bool	contains (double value) const
	Check if a value is between lowerBound() and upperBound()
void	setTicks (int tickType, const QList< double > &)
	Assign ticks.
QList< double >	ticks (int tickType) const
	Return a list of ticks.
bool	isEmpty () const
	Check if the scale division is empty.
bool	isIncreasing () const
	Check if the scale division is increasing.
void	invert ()
	Invert the scale division.
QwtScaleDiv	inverted () const
	Get a scale division with inverted boundaries and ticks.
QwtScaleDiv	bounded (double lowerBound, double upperBound) const
	Return a scale division with an interval [lowerBound, upperBound] where all ticks outside this interval are removed.

Detailed Description

A class representing a scale division/表示刻度划分的类

A Qwt scale is defined by its boundaries and 3 list for the positions of the major, medium and minor ticks.

The upperBound() might be smaller than the lowerBound() to indicate inverted scales.

Scale divisions can be calculated from a QwtScaleEngine.

Qwt 刻度由其边界以及分别表示主刻度、中刻度和次刻度位置的三个列表定义。

upperBound() 可能小于 lowerBound()，以此表示刻度是反向的。

刻度划分可通过 QwtScaleEngine 计算得出。

See also

QwtScaleEngine::divideScale(), QwtPlot::setAxisScaleDiv(), QwtAbstractSlider::setScaleDiv()

Member Enumeration Documentation

TickType

enum QwtScaleDiv::TickType

Scale tick types.

Enumerator
NoTick	No ticks.
MinorTick	Minor ticks.
MediumTick	Medium ticks.
MajorTick	Major ticks.
NTickTypes	Number of valid tick types.

Constructor & Destructor Documentation

QwtScaleDiv() [1/4]

QwtScaleDiv::QwtScaleDiv ( double  lowerBound = 0.0, double  upperBound = 0.0  )

explicit

Construct a division without ticks.

QwtScaleDiv() [2/4]

QwtScaleDiv::QwtScaleDiv ( const QwtInterval &  interval, QList< double >  ticks[NTickTypes]  )

explicit

Construct a scale division.

QwtScaleDiv() [3/4]

QwtScaleDiv::QwtScaleDiv ( double  lowerBound, double  upperBound, QList< double >  ticks[NTickTypes]  )

explicit

Construct a scale division.

QwtScaleDiv() [4/4]

QwtScaleDiv::QwtScaleDiv ( double  lowerBound, double  upperBound, const QList< double > &  minorTicks, const QList< double > &  mediumTicks, const QList< double > &  majorTicks  )

explicit

Construct a scale division.

Member Function Documentation

bounded()

QwtScaleDiv QwtScaleDiv::bounded	(	double	lowerBound,
		double	upperBound
	)		const

Return a scale division with an interval [lowerBound, upperBound] where all ticks outside this interval are removed.

contains()

bool QwtScaleDiv::contains

(

double

value

)

const

Check if a value is between lowerBound() and upperBound()

fuzzyCompare()

bool QwtScaleDiv::fuzzyCompare

(

const QwtScaleDiv &

other

)

const

Fuzzy comparison.

interval()

QwtInterval QwtScaleDiv::interval

(

)

const

Get the interval from lowerBound to upperBound.

invert()

void QwtScaleDiv::invert

(

)

Invert the scale division.

inverted()

QwtScaleDiv QwtScaleDiv::inverted

(

)

const

Get a scale division with inverted boundaries and ticks.

isEmpty()

bool QwtScaleDiv::isEmpty

(

)

const

Check if the scale division is empty.

isIncreasing()

bool QwtScaleDiv::isIncreasing

(

)

const

Check if the scale division is increasing.

lowerBound()

double QwtScaleDiv::lowerBound

(

)

const

Get the first boundary.

operator!=()

bool QwtScaleDiv::operator!=

(

const QwtScaleDiv &

other

)

const

Inequality operator.

operator==()

bool QwtScaleDiv::operator==

(

const QwtScaleDiv &

other

)

const

Equality operator.

range()

double QwtScaleDiv::range

(

)

const

Get the range (upperBound - lowerBound)

setInterval() [1/2]

void QwtScaleDiv::setInterval

(

const QwtInterval &

interval

)

Change the interval.

setInterval() [2/2]

void QwtScaleDiv::setInterval	(	double	lowerBound,
		double	upperBound
	)

Change the interval.

setLowerBound()

void QwtScaleDiv::setLowerBound

(

double

lowerBound

)

Set the first boundary.

setTicks()

void QwtScaleDiv::setTicks	(	int	tickType,
		const QList< double > &	ticks
	)

Assign ticks.

setUpperBound()

void QwtScaleDiv::setUpperBound

(

double

upperBound

)

Set the second boundary.

ticks()

QList< double > QwtScaleDiv::ticks

(

int

tickType

)

const

Return a list of ticks.

upperBound()

double QwtScaleDiv::upperBound

(

)

const

Get the upper bound.

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

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