A class representing an interval 更多...

#include <qwt_interval.h>

Public 类型
enum	BorderFlag { IncludeBorders = 0x00 , ExcludeMinimum = 0x01 , ExcludeMaximum = 0x02 , ExcludeBorders = ExcludeMinimum \| ExcludeMaximum }
	Flag indicating if a border is included or excluded 更多...

Public 成员函数
constexpr	QwtInterval () noexcept
	Border flags

constexpr	QwtInterval (double minValue, double maxValue, BorderFlags=IncludeBorders) noexcept
	Constructor with min/max values

void	setInterval (double minValue, double maxValue, BorderFlags=IncludeBorders) noexcept
	Assign the limits of the interval

QwtInterval	normalized () const
	Normalize the limits of the interval

QwtInterval	inverted () const
	Invert the interval

QwtInterval	limited (double lowerBound, double upperBound) const
	Limit the interval, keeping the border modes

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

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

void	setBorderFlags (BorderFlags) noexcept
	Change the border flags

constexpr BorderFlags	borderFlags () const noexcept

constexpr double	minValue () const noexcept

constexpr double	maxValue () const noexcept

constexpr double	centerValue () const noexcept

constexpr double	width () const noexcept
	Return the width of an interval

constexpr long double	widthL () const noexcept
	Return the width of an interval as long double

void	setMinValue (double) noexcept
	Assign the lower limit of the interval

void	setMaxValue (double) noexcept
	Assign the upper limit of the interval

bool	contains (double value) const
	Test if a value is inside an interval

bool	contains (const QwtInterval &) const
	Test if an interval is inside an interval

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

QwtInterval	intersect (const QwtInterval &) const
	Intersect two intervals

QwtInterval	unite (const QwtInterval &) const
	Unite two intervals

QwtInterval	operator\| (const QwtInterval &) const
	Union of two intervals

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

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

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

QwtInterval	extend (double value) const
	Extend the interval

QwtInterval	operator\| (double) const
	Extend an interval

QwtInterval &	operator\|= (double)
	Extend an interval

constexpr bool	isValid () const noexcept
	Check if the interval is valid

constexpr bool	isNull () const noexcept
	Check if interval is null

void	invalidate () noexcept
	Invalidate the interval

QwtInterval	symmetrize (double value) const
	Symmetrize the interval around a value

详细描述

A class representing an interval

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

成员枚举类型说明

◆ BorderFlag

enum QwtInterval::BorderFlag

Flag indicating if a border is included or excluded

参见: setBorderFlags(), borderFlags()

枚举值
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

构造及析构函数说明

◆ QwtInterval() [1/2]

constexpr QwtInterval::QwtInterval ( )

inlineconstexprnoexcept

Border flags

Default Constructor

Creates an invalid interval [0.0, -1.0]

参见: setInterval(), isValid()

◆ QwtInterval() [2/2]

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

inlineconstexprnoexcept

Constructor with min/max values

参数

minValue	Minimum value
maxValue	Maximum value
borderFlags	Include/Exclude borders

成员函数说明

◆ borderFlags()

constexpr QwtInterval::BorderFlags QwtInterval::borderFlags ( ) const

inlineconstexprnoexcept

返回: Border flags

参见: setBorderFlags()

◆ centerValue()

constexpr double QwtInterval::centerValue ( ) const

inlineconstexprnoexcept

返回: Center of the interval

参见: width()

◆ contains() [1/2]

bool QwtInterval::contains ( const QwtInterval & interval ) const

Test if an interval is inside an interval

参数

[in] interval Interval to test

返回: True if interval lies inside the boundaries

◆ contains() [2/2]

bool QwtInterval::contains ( double value ) const

Test if a value is inside an interval

参数

[in] value Value to test

返回: True if value lies inside the boundaries

◆ 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.

参数

[in] value Value to extend with

返回: Extended interval

参见: isValid()

◆ intersect()

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

Intersect two intervals

参数

[in] other Interval to intersect with

返回: Intersection of this and other

◆ intersects()

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

Test if two intervals overlap

参数

[in] other Interval to test

返回: True when the intervals are intersecting

◆ invalidate()

void QwtInterval::invalidate ( )

inlinenoexcept

Invalidate the interval

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

参见: isValid()

◆ inverted()

QwtInterval QwtInterval::inverted ( ) const

Invert the interval

minValue() and maxValue() are swapped, border flags remain unchanged.

◆ isNull()

constexpr bool QwtInterval::isNull ( ) const

inlineconstexprnoexcept

Check if interval is null

返回: True if isValid() && (minValue() >= maxValue())

◆ isValid()

constexpr bool QwtInterval::isValid ( ) const

inlineconstexprnoexcept

Check if the interval is valid

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

返回: True, if the interval is valid

参见: isValid()

◆ limited()

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

Limit the interval, keeping the border modes

参数

[in]	lowerBound	Lower limit
[in]	upperBound	Upper limit

返回: Limited interval

◆ maxValue()

constexpr double QwtInterval::maxValue ( ) const

inlineconstexprnoexcept

返回: Maximum value of the interval

参见: setMaxValue()

◆ minValue()

constexpr double QwtInterval::minValue ( ) const

inlineconstexprnoexcept

返回: Minimum value of the interval

参见: setMinValue()

◆ normalized()

QwtInterval QwtInterval::normalized ( ) const

Normalize the limits of the interval

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

◆ operator!=()

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

inline

Compare two intervals

参数

[in] other Interval to compare with

返回: True when this and other are not equal

◆ operator&()

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

inline

Intersection of two intervals

参数

[in] other Interval to intersect with

返回: Intersection of this and other

参见: intersect()

◆ operator&=()

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

Intersect this interval with the given interval

参数

[in] other Interval to be intersected with

返回: Reference to this interval

◆ operator==()

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

inline

Compare two intervals

参数

[in] other Interval to compare with

返回: True when this and other are equal

◆ operator|() [1/2]

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

inline

Union of two intervals

参数

[in] other Interval to unite with

返回: Union of this and other

参见: unite()

◆ operator|() [2/2]

QwtInterval QwtInterval::operator| ( double value ) const

inline

Extend an interval

参数

[in] value Value to extend with

返回: Extended interval

参见: extend()

◆ operator|=() [1/2]

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

Unite this interval with the given interval

参数

[in] other Interval to be united with

返回: Reference to this interval

◆ operator|=() [2/2]

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

Extend an interval

参数

[in] value Value to extend with

返回: Reference to the extended interval

参见: extend()

◆ setBorderFlags()

void QwtInterval::setBorderFlags ( BorderFlags borderFlags )

inlinenoexcept

Change the border flags

参数

borderFlags Or'd BorderMode flags

参见: borderFlags()

◆ setInterval()

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

inlinenoexcept

Assign the limits of the interval

参数

minValue	Minimum value
maxValue	Maximum value
borderFlags	Include/Exclude borders

◆ setMaxValue()

void QwtInterval::setMaxValue ( double maxValue )

inlinenoexcept

Assign the upper limit of the interval

参数

maxValue Maximum value

◆ setMinValue()

void QwtInterval::setMinValue ( double minValue )

inlinenoexcept

Assign the lower limit of the interval

参数

minValue Minimum value

◆ symmetrize()

QwtInterval QwtInterval::symmetrize ( double value ) const

Symmetrize the interval around a value

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

参数

[in] value Center value

返回: Interval with value as center

◆ unite()

QwtInterval QwtInterval::unite ( const QwtInterval & other ) const

Unite two intervals

参数

[in] other Interval to unite with

返回: Union of this and other

参见: intersect()

◆ width()

constexpr double QwtInterval::width ( ) const

inlineconstexprnoexcept

Return the width of an interval

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

返回: Interval width

参见: isValid()

◆ widthL()

constexpr long double QwtInterval::widthL ( ) const

inlineconstexprnoexcept

Return the width of an interval as long double

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

返回: Interval width

参见: isValid()

该类的文档由以下文件生成:

/home/runner/work/QWT/QWT/src/core/qwt_interval.h
/home/runner/work/QWT/QWT/src/core/qwt_interval.cpp

Public 类型

Public 成员函数

详细描述

成员枚举类型说明

◆ BorderFlag

构造及析构函数说明

◆ QwtInterval() [1/2]

◆ QwtInterval() [2/2]

成员函数说明

◆ borderFlags()

◆ centerValue()

◆ contains() [1/2]

◆ contains() [2/2]

◆ 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()

◆ unite()

◆ width()

◆ widthL()