QwtScaleDiv Class Reference

A class representing a scale division. 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)
	QwtScaleDiv (const QwtInterval &, QList< double >[NTickTypes])
	QwtScaleDiv (double lowerBound, double upperBound, QList< double >[NTickTypes])
	QwtScaleDiv (double lowerBound, double upperBound, const QList< double > &minorTicks, const QList< double > &mediumTicks, const QList< double > &majorTicks)
bool	operator== (const QwtScaleDiv &) const
	Equality operator.
bool	operator!= (const QwtScaleDiv &) const
	Inequality.
void	setInterval (double lowerBound, double upperBound)
void	setInterval (const QwtInterval &)
QwtInterval	interval () const
void	setLowerBound (double)
double	lowerBound () const
void	setUpperBound (double)
double	upperBound () const
double	range () const
bool	contains (double value) const
void	setTicks (int tickType, const QList< double > &)
QList< double >	ticks (int tickType) const
bool	isEmpty () const
	Check if the scale division is empty( lowerBound() == upperBound() )
bool	isIncreasing () const
	Check if the scale division is increasing( lowerBound() <= upperBound() )
void	invert ()
QwtScaleDiv	inverted () const
QwtScaleDiv	bounded (double lowerBound, double upperBound) const

Detailed Description

A class representing a scale division.

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.

See also

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

Definition at line 33 of file qwt_scale_div.h.

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.

Definition at line 37 of file qwt_scale_div.h.

Constructor & Destructor Documentation

QwtScaleDiv() [1/4]

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

explicit

Construct a division without ticks

Parameters

lowerBound	First boundary
upperBound	Second boundary

Note

lowerBound might be greater than upperBound for inverted scales

Definition at line 21 of file qwt_scale_div.cpp.

QwtScaleDiv() [2/4]

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

explicit

Construct a scale division

Parameters

interval	Interval
ticks	List of major, medium and minor ticks

Definition at line 33 of file qwt_scale_div.cpp.

QwtScaleDiv() [3/4]

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

explicit

Construct a scale division

Parameters

lowerBound	First boundary
upperBound	Second boundary
ticks	List of major, medium and minor ticks

Note

lowerBound might be greater than upperBound for inverted scales

Definition at line 51 of file qwt_scale_div.cpp.

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

Parameters

lowerBound	First boundary
upperBound	Second boundary
minorTicks	List of minor ticks
mediumTicks	List medium ticks
majorTicks	List of major ticks

Note

lowerBound might be greater than upperBound for inverted scales

Definition at line 71 of file qwt_scale_div.cpp.

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

Parameters

lowerBound	Lower bound
upperBound	Upper bound

Returns

Scale division with all ticks inside of the given interval

Note

lowerBound might be greater than upperBound for inverted scales

Definition at line 263 of file qwt_scale_div.cpp.

contains()

bool QwtScaleDiv::contains

(

double

value

)

const

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

Parameters

value

Value

Returns

true/false

Definition at line 212 of file qwt_scale_div.cpp.

interval()

QwtInterval QwtScaleDiv::interval

(

)

const

Returns

lowerBound -> upperBound

Definition at line 111 of file qwt_scale_div.cpp.

invert()

void QwtScaleDiv::invert

(

)

Invert the scale division

See also

inverted()

Definition at line 224 of file qwt_scale_div.cpp.

inverted()

QwtScaleDiv QwtScaleDiv::inverted

(

)

const

Returns

A scale division with inverted boundaries and ticks

See also

invert()

Definition at line 244 of file qwt_scale_div.cpp.

isEmpty()

bool QwtScaleDiv::isEmpty

(

)

const

Check if the scale division is empty( lowerBound() == upperBound() )

Definition at line 195 of file qwt_scale_div.cpp.

isIncreasing()

bool QwtScaleDiv::isIncreasing

(

)

const

Check if the scale division is increasing( lowerBound() <= upperBound() )

Definition at line 201 of file qwt_scale_div.cpp.

lowerBound()

double QwtScaleDiv::lowerBound

(

)

const

Returns

First boundary

See also

upperBound()

Definition at line 131 of file qwt_scale_div.cpp.

operator!=()

bool QwtScaleDiv::operator!=

(

const QwtScaleDiv &

other

)

const

Inequality.

Returns

true if this instance is not equal to other

Definition at line 189 of file qwt_scale_div.cpp.

operator==()

bool QwtScaleDiv::operator==

(

const QwtScaleDiv &

other

)

const

Equality operator.

Returns

true if this instance is equal to other

Definition at line 168 of file qwt_scale_div.cpp.

range()

double QwtScaleDiv::range

(

)

const

Returns

upperBound() - lowerBound()

Definition at line 159 of file qwt_scale_div.cpp.

setInterval() [1/2]

void QwtScaleDiv::setInterval

(

const QwtInterval &

interval

)

Change the interval

Parameters

interval

Interval

Definition at line 102 of file qwt_scale_div.cpp.

setInterval() [2/2]

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

Change the interval

Parameters

lowerBound	First boundary
upperBound	Second boundary

Note

lowerBound might be greater than upperBound for inverted scales

Definition at line 91 of file qwt_scale_div.cpp.

setLowerBound()

void QwtScaleDiv::setLowerBound

(

double

lowerBound

)

Set the first boundary

Parameters

lowerBound

First boundary

See also

lowerBound(), setUpperBound()

Definition at line 122 of file qwt_scale_div.cpp.

setTicks()

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

Assign ticks

Parameters

tickType	MinorTick, MediumTick or MajorTick
ticks	Values of the tick positions

Definition at line 297 of file qwt_scale_div.cpp.

setUpperBound()

void QwtScaleDiv::setUpperBound

(

double

upperBound

)

Set the second boundary

Parameters

upperBound

Second boundary

See also

upperBound(), setLowerBound()

Definition at line 142 of file qwt_scale_div.cpp.

ticks()

QList< double > QwtScaleDiv::ticks

(

int

tickType

)

const

Return a list of ticks

Parameters

tickType

MinorTick, MediumTick or MajorTick

Returns

Tick list

Definition at line 309 of file qwt_scale_div.cpp.

upperBound()

double QwtScaleDiv::upperBound

(

)

const

Returns

upper bound

See also

lowerBound()

Definition at line 151 of file qwt_scale_div.cpp.