A class representing an interval. More...

#include <qwt_interval.h>

Public Types
enum	BorderFlag { IncludeBorders = 0x00, ExcludeMinimum = 0x01, ExcludeMaximum = 0x02, ExcludeBorders = ExcludeMinimum \| ExcludeMaximum }

typedef QFlags< BorderFlag >	BorderFlags
	Border flags.

Public Member Functions
	QwtInterval ()
	Default Constructor. More...

	QwtInterval (double minValue, double maxValue, BorderFlags=IncludeBorders)

void	setInterval (double minValue, double maxValue, BorderFlags=IncludeBorders)

QwtInterval	normalized () const
	Normalize the limits of the interval. More...

QwtInterval	inverted () const

QwtInterval	limited (double lowerBound, double upperBound) const

bool	operator== (const QwtInterval &) const
	Compare two intervals. More...

bool	operator!= (const QwtInterval &) const
	Compare two intervals. More...

void	setBorderFlags (BorderFlags)

BorderFlags	borderFlags () const

double	minValue () const

double	maxValue () const

double	width () const
	Return the width of an interval. More...

void	setMinValue (double)

void	setMaxValue (double)

bool	contains (double value) const

bool	intersects (const QwtInterval &) const
	Test if two intervals overlap. More...

QwtInterval	intersect (const QwtInterval &) const
	Intersect 2 intervals. More...

QwtInterval	unite (const QwtInterval &) const
	Unite 2 intervals.

QwtInterval	operator\| (const QwtInterval &) const

QwtInterval	operator& (const QwtInterval &) const
	Intersection of two intervals. More...

QwtInterval &	operator\|= (const QwtInterval &)
	Unite this interval with the given interval. More...

QwtInterval &	operator&= (const QwtInterval &)
	Intersect this interval with the given interval. More...

QwtInterval	extend (double value) const
	Extend the interval. More...

QwtInterval	operator\| (double) const

QwtInterval &	operator\|= (double)

bool	isValid () const

bool	isNull () const

void	invalidate ()

QwtInterval	symmetrize (double value) const

Detailed Description

A class representing an interval.

The interval is represented by 2 doubles, the lower and the upper limit.

Member Enumeration Documentation

◆ BorderFlag

enum QwtInterval::BorderFlag

Flag indicating if a border is included or excluded

See also: setBorderFlags(), borderFlags()

Enumerator
IncludeBorders	Min/Max values are inside the interval.
ExcludeMinimum	Min value is not included in the interval.
ExcludeMaximum	Max value is not included in the interval.
ExcludeBorders	Min/Max values are not included in the interval.

Constructor & Destructor Documentation

◆ QwtInterval() [1/2]

QwtInterval::QwtInterval ( )

inline

Default Constructor.

Creates an invalid interval [0.0, -1.0]

See also: setInterval(), isValid()

◆ QwtInterval() [2/2]

QwtInterval::QwtInterval	(	double	minValue,
		double	maxValue,
		BorderFlags	borderFlags = `IncludeBorders`
	)

inline

Constructor

Build an interval with from min/max values

Parameters

minValue	Minimum value
maxValue	Maximum value
borderFlags	Include/Exclude borders

Member Function Documentation

◆ borderFlags()

QwtInterval::BorderFlags QwtInterval::borderFlags ( ) const

inline

Returns: Border flags

See also: setBorderFlags()

◆ contains()

bool QwtInterval::contains ( double value ) const

Test if a value is inside an interval

Parameters

value Value

Returns: true, if value >= minValue() && value <= maxValue()

◆ extend()

QwtInterval QwtInterval::extend ( double value ) const

Extend the interval.

If value is below minValue(), value becomes the lower limit. If value is above maxValue(), value becomes the upper limit.

extend() has no effect for invalid intervals

Parameters

value Value

Returns: extended interval

See also: isValid()

◆ intersect()

QwtInterval QwtInterval::intersect ( const QwtInterval & other ) const

Intersect 2 intervals.

Parameters

other Interval to be intersect with

Returns: Intersection

◆ intersects()

bool QwtInterval::intersects ( const QwtInterval & other ) const

Test if two intervals overlap.

Parameters

other Interval

Returns: True, when the intervals are intersecting

◆ invalidate()

void QwtInterval::invalidate ( )

inline

Invalidate the interval

The limits are set to interval [0.0, -1.0]

See also: isValid()

◆ inverted()

QwtInterval QwtInterval::inverted ( ) const

Invert the limits of the interval

Returns: Inverted interval

See also: normalized()

◆ isNull()

bool QwtInterval::isNull ( ) const

inline

Returns: true, if isValid() && (minValue() >= maxValue())

◆ isValid()

bool QwtInterval::isValid ( ) const

inline

A interval is valid when minValue() <= maxValue(). In case of QwtInterval::ExcludeBorders it is true when minValue() < maxValue()

Returns: True, when the interval is valid

◆ limited()

QwtInterval QwtInterval::limited	(	double	lowerBound,
		double	upperBound
	)		const

Limit the interval, keeping the border modes

Parameters

lowerBound	Lower limit
upperBound	Upper limit

Returns: Limited interval

◆ maxValue()

double QwtInterval::maxValue ( ) const

inline

Returns: Upper limit of the interval

◆ minValue()

double QwtInterval::minValue ( ) const

inline

Returns: Lower limit of the interval

◆ normalized()

QwtInterval QwtInterval::normalized ( ) const

Normalize the limits of the interval.

If maxValue() < minValue() the limits will be inverted.

Returns: Normalized interval

See also: isValid(), inverted()

◆ operator!=()

bool QwtInterval::operator!= ( const QwtInterval & other ) const

inline

Compare two intervals.

Parameters

other Interval to compare with

Returns: True, when this and other are not equal

◆ operator&()

QwtInterval QwtInterval::operator& ( const QwtInterval & other ) const

inline

Intersection of two intervals.

Parameters

other Interval to intersect with

Returns: Intersection of this and other

See also: intersect()

◆ operator&=()

QwtInterval & QwtInterval::operator&= ( const QwtInterval & other )

Intersect this interval with the given interval.

Parameters

other Interval to be intersected with

Returns: This interval

◆ operator==()

bool QwtInterval::operator== ( const QwtInterval & other ) const

inline

Compare two intervals.

Parameters

other Interval to compare with

Returns: True, when this and other are equal

◆ operator|() [1/2]

QwtInterval QwtInterval::operator| ( const QwtInterval & other ) const

inline

Union of two intervals

Parameters

other Interval to unite with

Returns: Union of this and other

See also: unite()

◆ operator|() [2/2]

QwtInterval QwtInterval::operator| ( double value ) const

inline

Extend an interval

Parameters

value Value

Returns: Extended interval

See also: extend()

◆ operator|=() [1/2]

QwtInterval & QwtInterval::operator|= ( const QwtInterval & other )

Unite this interval with the given interval.

Parameters

other Interval to be united with

Returns: This interval

◆ operator|=() [2/2]

QwtInterval & QwtInterval::operator|= ( double value )

Extend an interval

Parameters

value Value

Returns: Reference of the extended interval

See also: extend()

◆ setBorderFlags()

void QwtInterval::setBorderFlags ( BorderFlags borderFlags )

inline

Change the border flags

Parameters

borderFlags Or'd BorderMode flags

See also: borderFlags()

◆ setInterval()

void QwtInterval::setInterval	(	double	minValue,
		double	maxValue,
		BorderFlags	borderFlags = `IncludeBorders`
	)

inline

Assign the limits of the interval

Parameters

minValue	Minimum value
maxValue	Maximum value
borderFlags	Include/Exclude borders

◆ setMaxValue()

void QwtInterval::setMaxValue ( double maxValue )

inline

Assign the upper limit of the interval

Parameters

maxValue Maximum value

◆ setMinValue()

void QwtInterval::setMinValue ( double minValue )

inline

Assign the lower limit of the interval

Parameters

minValue Minimum value

◆ symmetrize()

QwtInterval QwtInterval::symmetrize ( double value ) const

Adjust the limit that is closer to value, so that value becomes the center of the interval.

Parameters

value Center

Returns: Interval with value as center

◆ width()

double QwtInterval::width ( ) const

inline

Return the width of an interval.

The width of invalid intervals is 0.0, otherwise the result is maxValue() - minValue().

Returns: Interval width

See also: isValid()

Public Types

Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ BorderFlag

Constructor & Destructor Documentation

◆ QwtInterval() [1/2]

◆ QwtInterval() [2/2]

Member Function Documentation

◆ borderFlags()

◆ contains()

◆ extend()

◆ intersect()

◆ intersects()

◆ invalidate()

◆ inverted()

◆ isNull()

◆ isValid()

◆ limited()

◆ maxValue()

◆ minValue()

◆ normalized()

◆ operator!=()

◆ operator&()

◆ operator&=()

◆ operator==()

◆ operator|() [1/2]

◆ operator|() [2/2]

◆ operator|=() [1/2]

◆ operator|=() [2/2]

◆ setBorderFlags()

◆ setInterval()

◆ setMaxValue()

◆ setMinValue()

◆ symmetrize()

◆ width()