Provided by: libqwt5-doc_5.2.3-1_all 
NAME
QwtDoubleInterval -
SYNOPSIS
#include <qwt_double_interval.h>
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 (doubleminValue, doublemaxValue, intborderFlags =
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
int QwtDoubleInterval::borderFlags () const [inline]
Returns:
Border flags
See also:
setBorderFlags()
bool QwtDoubleInterval::contains (doublevalue) const
Test if a value is inside an interval
Parameters:
value Value
Returns:
true, if value >= minValue() && value <= maxValue()
QwtDoubleInterval QwtDoubleInterval::extend (doublevalue) 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 (doublelowerBound, doubleupperBound) 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| (doublevalue) const [inline]
Extend an interval
See also:
extend()
void QwtDoubleInterval::setBorderFlags (intborderFlags) [inline]
Change the border flags
Parameters:
borderFlags Or'd BorderMode flags
See also:
borderFlags()
void QwtDoubleInterval::setInterval (doubleminValue, doublemaxValue, intborderFlags =
IncludeBorders) [inline]
Assign the limits of the interval
Parameters:
minValue Minimum value
maxValue Maximum value
borderFlags Include/Exclude borders
void QwtDoubleInterval::setMaxValue (doublemaxValue) [inline]
Assign the upper limit of the interval
Parameters:
maxValue Maximum value
void QwtDoubleInterval::setMinValue (doubleminValue) [inline]
Assign the lower limit of the interval
Parameters:
minValue Minimum value
QwtDoubleInterval QwtDoubleInterval::symmetrize (doublevalue) 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()
Author
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