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. More...
bool	operator!= (const QwtScaleDiv &) const
	Inequality. More...
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()

Member Enumeration Documentation

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::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

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

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

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

Member Function Documentation

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

bool QwtScaleDiv::contains

(

double

value

)

const

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

Parameters

value

Value

Returns

true/false

QwtInterval QwtScaleDiv::interval

(

)

const

Returns

lowerBound -> upperBound

void QwtScaleDiv::invert

(

)

Invert the scale division

See also

inverted()

QwtScaleDiv QwtScaleDiv::inverted

(

)

const

Returns

A scale division with inverted boundaries and ticks

See also

invert()

double QwtScaleDiv::lowerBound

(

)

const

Returns

First boundary

See also

upperBound()

bool QwtScaleDiv::operator!=

(

const QwtScaleDiv &

other

)

const

Inequality.

Returns

true if this instance is not equal to other

bool QwtScaleDiv::operator==

(

const QwtScaleDiv &

other

)

const

Equality operator.

Returns

true if this instance is equal to other

double QwtScaleDiv::range

(

)

const

Returns

upperBound() - lowerBound()

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

void QwtScaleDiv::setInterval

(

const QwtInterval &

interval

)

Change the interval

Parameters

interval

Interval

void QwtScaleDiv::setLowerBound

(

double

lowerBound

)

Set the first boundary

Parameters

lowerBound

First boundary

See also

lowerBiound(), setUpperBound()

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

Assign ticks

Parameters

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

void QwtScaleDiv::setUpperBound

(

double

upperBound

)

Set the second boundary

Parameters

upperBound

Second boundary

See also

upperBound(), setLowerBound()

QList< double > QwtScaleDiv::ticks

(

int

type

)

const

Return a list of ticks

Parameters

type	MinorTick, MediumTick or MajorTick

Returns

Tick list

double QwtScaleDiv::upperBound

(

)

const

Returns

upper bound

See also

lowerBound()