Provided by: libqwt-doc_6.0.0-1.2_all 
NAME
QwtInterval -
A class representing an interval.
SYNOPSIS
#include <qwt_interval.h>
Public Types
enum BorderFlag { IncludeBorders = 0x00, ExcludeMinimum = 0x01, ExcludeMaximum = 0x02,
ExcludeBorders = ExcludeMinimum | ExcludeMaximum }
typedef QFlags< BorderFlag > BorderFlags
Public Member Functions
QwtInterval ()
QwtInterval (double minValue, double maxValue, BorderFlags=IncludeBorders)
void setInterval (double minValue, double maxValue, BorderFlags=IncludeBorders)
QwtInterval normalized () const
QwtInterval inverted () const
QwtInterval limited (double minValue, double maxValue) const
bool operator== (const QwtInterval &) const
bool operator!= (const QwtInterval &) const
void setBorderFlags (BorderFlags)
BorderFlags borderFlags () const
double minValue () const
double maxValue () const
double width () const
void setMinValue (double)
void setMaxValue (double)
bool contains (double value) const
bool intersects (const QwtInterval &) const
QwtInterval intersect (const QwtInterval &) const
QwtInterval unite (const QwtInterval &) const
QwtInterval operator| (const QwtInterval &) const
QwtInterval operator& (const QwtInterval &) const
QwtInterval & operator|= (const QwtInterval &)
QwtInterval & operator&= (const QwtInterval &)
QwtInterval extend (double value) const
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 Typedef Documentation
typedef QFlags<BorderFlag> QwtInterval::BorderFlags
Border flags.
Member Enumeration Documentation
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::QwtInterval () [inline]
Default Constructor. Creates an invalid interval [0.0, -1.0]
See also:
setInterval(), isValid()
QwtInterval::QwtInterval (doubleminValue, doublemaxValue, BorderFlagsborderFlags =
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
QwtInterval::BorderFlags QwtInterval::borderFlags () const [inline] Returns:
Border flags
See also:
setBorderFlags()
bool QwtInterval::contains (doublevalue) const Test if a value is inside an interval
Parameters:
value Value
Returns:
true, if value >= minValue() && value <= maxValue()
QwtInterval QwtInterval::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()
QwtInterval QwtInterval::intersect (const QwtInterval &other) const
Intersect 2 intervals.
bool QwtInterval::intersects (const QwtInterval &other) const Test if two intervals overlap
void QwtInterval::invalidate () [inline] Invalidate the interval
The limits are set to interval [0.0, -1.0]
See also:
isValid()
QwtInterval QwtInterval::inverted () const Invert the limits of the interval
Returns:
Inverted interval
See also:
normalized()
bool QwtInterval::isNull () const [inline] Returns:
true, if isValid() && (minValue() >= maxValue())
bool QwtInterval::isValid () const [inline] A interval is valid when minValue() <= maxValue().
In case of QwtInterval::ExcludeBorders it is true when minValue() < maxValue()
QwtInterval QwtInterval::limited (doublelowerBound, doubleupperBound) const Limit the
interval, keeping the border modes
Parameters:
lowerBound Lower limit
upperBound Upper limit
Returns:
Limited interval
double QwtInterval::maxValue () const [inline] Returns:
Upper limit of the interval
double QwtInterval::minValue () const [inline] Returns:
Lower limit of the interval
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()
bool QwtInterval::operator!= (const QwtInterval &other) const [inline]
Compare two intervals.
QwtInterval QwtInterval::operator& (const QwtInterval &interval) const [inline] Intersection
of two intervals
See also:
intersect()
QwtInterval & QwtInterval::operator&= (const QwtInterval &interval)
Intersects this interval with the given interval.
bool QwtInterval::operator== (const QwtInterval &other) const [inline]
Compare two intervals.
QwtInterval QwtInterval::operator| (const QwtInterval &interval) const [inline] Union of two
intervals
See also:
unite()
QwtInterval QwtInterval::operator| (doublevalue) const [inline] Extend an interval
Parameters:
value Value
Returns:
Extended interval
See also:
extend()
QwtInterval & QwtInterval::operator|= (const QwtInterval &interval)
Unites this interval with the given interval.
QwtInterval & QwtInterval::operator|= (doublevalue) Extend an interval
Parameters:
value Value
Returns:
Reference of the extended interval
See also:
extend()
void QwtInterval::setBorderFlags (BorderFlagsborderFlags) [inline] Change the border flags
Parameters:
borderFlags Or'd BorderMode flags
See also:
borderFlags()
void QwtInterval::setInterval (doubleminValue, doublemaxValue, BorderFlagsborderFlags =
IncludeBorders) [inline] Assign the limits of the interval
Parameters:
minValue Minimum value
maxValue Maximum value
borderFlags Include/Exclude borders
void QwtInterval::setMaxValue (doublemaxValue) [inline] Assign the upper limit of the interval
Parameters:
maxValue Maximum value
void QwtInterval::setMinValue (doubleminValue) [inline] Assign the lower limit of the interval
Parameters:
minValue Minimum value
QwtInterval QwtInterval::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
QwtInterval QwtInterval::unite (const QwtInterval &other) const
Unite 2 intervals.
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().
See also:
isValid()
Author
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