QwtInterval(3) | Qwt User's Guide | QwtInterval(3) |
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 }
Public Member Functions¶
QwtInterval ()
Detailed Description¶
A class representing an interval.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()
- 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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