QwtDoubleInterval Class Reference

#include <qwt_double_interval.h>

List of all members.

Public Types
enum	BorderMode {   IncludeBorders = 0,   ExcludeMinimum = 1,   ExcludeMaximum = 2,   ExcludeBorders = ExcludeMinimum | ExcludeMaximum }

Public Member Functions
	QwtDoubleInterval ()
	QwtDoubleInterval (double minValue, double maxValue, int borderFlags=IncludeBorders)
int	borderFlags () const
bool	contains (double value) const
QwtDoubleInterval	extend (double value) const
QwtDoubleInterval	intersect (const QwtDoubleInterval &) const
bool	intersects (const QwtDoubleInterval &) const
void	invalidate ()
QwtDoubleInterval	inverted () const
bool	isNull () const
bool	isValid () const
QwtDoubleInterval	limited (double minValue, double maxValue) const
double	maxValue () const
double	minValue () const
QwtDoubleInterval	normalized () const
int	operator!= (const QwtDoubleInterval &) const
QwtDoubleInterval	operator& (const QwtDoubleInterval &) const
QwtDoubleInterval &	operator&= (const QwtDoubleInterval &)
int	operator== (const QwtDoubleInterval &) const
QwtDoubleInterval	operator| (const QwtDoubleInterval &) const
QwtDoubleInterval	operator| (double) const
QwtDoubleInterval &	operator|= (const QwtDoubleInterval &)
QwtDoubleInterval &	operator|= (double)
void	setBorderFlags (int)
void	setInterval (double minValue, double maxValue, int borderFlags=IncludeBorders)
void	setMaxValue (double)
void	setMinValue (double)
QwtDoubleInterval	symmetrize (double value) const
QwtDoubleInterval	unite (const QwtDoubleInterval &) const
double	width () const

---

Detailed Description

A class representing an interval.

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

---

Member Enumeration Documentation

enum QwtDoubleInterval::BorderMode

Flag indicating if a border is included/excluded from an interval

• 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

See also:

setBorderMode(), testBorderMode()

---

Constructor & Destructor Documentation

QwtDoubleInterval::QwtDoubleInterval ( )

inline

Default Constructor.

Creates an invalid interval [0.0, -1.0]

See also:

setInterval(), isValid()

QwtDoubleInterval::QwtDoubleInterval ( double  minValue, double  maxValue, int  borderFlags = IncludeBorders  )

inline

Constructor

Build an interval with from min/max values

Parameters:

minValue	Minimum value
maxValue	Maximum value
borderFlags	Include/Exclude borders

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Member Function Documentation

int QwtDoubleInterval::borderFlags ( ) const

inline

Returns:

Border flags

See also:

setBorderFlags()

bool QwtDoubleInterval::contains

(

double

value

)

const

Test if a value is inside an interval

Parameters:

value

Value

Returns:

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

QwtDoubleInterval QwtDoubleInterval::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

See also:

isValid()

bool QwtDoubleInterval::intersects

(

const QwtDoubleInterval &

other

)

const

Test if two intervals overlap

void QwtDoubleInterval::invalidate ( )

inline

Invalidate the interval

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

See also:

isValid()

QwtDoubleInterval QwtDoubleInterval::inverted

(

)

const

Invert the limits of the interval

Returns:

Inverted interval

See also:

normalized()

bool QwtDoubleInterval::isNull ( ) const

inline

Returns:

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

bool QwtDoubleInterval::isValid ( ) const

inline

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

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

Limit the interval, keeping the border modes

Parameters:

lowerBound	Lower limit
upperBound	Upper limit

Returns:

Limited interval

double QwtDoubleInterval::maxValue ( ) const

inline

Returns:

Upper limit of the interval

double QwtDoubleInterval::minValue ( ) const

inline

Returns:

Lower limit of the interval

QwtDoubleInterval QwtDoubleInterval::normalized

(

)

const

Normalize the limits of the interval.

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

Returns:

Normalized interval

See also:

isValid(), inverted()

QwtDoubleInterval QwtDoubleInterval::operator& ( const QwtDoubleInterval &  interval ) const

inline

Intersection of two intervals

See also:

intersect()

QwtDoubleInterval QwtDoubleInterval::operator| ( const QwtDoubleInterval &  interval ) const

inline

Union of two intervals

See also:

unite()

QwtDoubleInterval QwtDoubleInterval::operator| ( double  value ) const

inline

Extend an interval

See also:

extend()

void QwtDoubleInterval::setBorderFlags ( int  borderFlags )

inline

Change the border flags

Parameters:

borderFlags

Or'd BorderMode flags

See also:

borderFlags()

void QwtDoubleInterval::setInterval ( double  minValue, double  maxValue, int  borderFlags = IncludeBorders  )

inline

Assign the limits of the interval

Parameters:

minValue	Minimum value
maxValue	Maximum value
borderFlags	Include/Exclude borders

void QwtDoubleInterval::setMaxValue ( double  maxValue )

inline

Assign the upper limit of the interval

Parameters:

maxValue

Maximum value

void QwtDoubleInterval::setMinValue ( double  minValue )

inline

Assign the lower limit of the interval

Parameters:

minValue

Minimum value

QwtDoubleInterval QwtDoubleInterval::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

double QwtDoubleInterval::width ( ) const

inline

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

See also:

isValid()