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QwtDoubleInterval(3) Qwt User's Guide QwtDoubleInterval(3)

QwtDoubleInterval -

#include <qwt_double_interval.h>


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


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
 

A class representing an interval.
The interval is represented by 2 doubles, the lower and the upper limit.

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()

Default Constructor. Creates an invalid interval [0.0, -1.0]
See also:
setInterval(), isValid()

Constructor
Build an interval with from min/max values
Parameters:
minValue Minimum value
 
maxValue Maximum value
 
borderFlags Include/Exclude borders

Returns:
Border flags
See also:
setBorderFlags()

Test if a value is inside an interval
Parameters:
value Value
Returns:
true, if value >= minValue() && value <= maxValue()

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()

Test if two intervals overlap

Invalidate the interval
The limits are set to interval [0.0, -1.0]
See also:
isValid()

Invert the limits of the interval
Returns:
Inverted interval
See also:
normalized()

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

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

Limit the interval, keeping the border modes
Parameters:
lowerBound Lower limit
 
upperBound Upper limit
Returns:
Limited interval

Returns:
Upper limit of the interval

Returns:
Lower limit of the interval

Normalize the limits of the interval. If maxValue() < minValue() the limits will be inverted.
Returns:
Normalized interval
See also:
isValid(), inverted()

Intersection of two intervals
See also:
intersect()

Union of two intervals
See also:
unite()

Extend an interval
See also:
extend()

Change the border flags
Parameters:
borderFlags Or'd BorderMode flags
See also:
borderFlags()

Assign the limits of the interval
Parameters:
minValue Minimum value
 
maxValue Maximum value
 
borderFlags Include/Exclude borders

Assign the upper limit of the interval
Parameters:
maxValue Maximum value

Assign the lower limit of the interval
Parameters:
minValue Minimum value

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

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

Generated automatically by Doxygen for Qwt User's Guide from the source code.
Tue Nov 20 2012 Version 5.2.3

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