Qwt User's Guide 5.2.2
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A class representing an interval. More...
#include <qwt_double_interval.h>
Public Types | |
enum | BorderMode { IncludeBorders = 0, ExcludeMinimum = 1, ExcludeMaximum = 2, ExcludeBorders = ExcludeMinimum | ExcludeMaximum } |
Public Member Functions | |
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| (double) const |
QwtDoubleInterval | operator| (const QwtDoubleInterval &) const |
QwtDoubleInterval & | operator|= (double) |
QwtDoubleInterval & | operator|= (const QwtDoubleInterval &) |
QwtDoubleInterval (double minValue, double maxValue, int borderFlags=IncludeBorders) | |
QwtDoubleInterval () | |
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
QwtDoubleInterval::QwtDoubleInterval | ( | ) | [inline] |
QwtDoubleInterval::QwtDoubleInterval | ( | double | minValue, |
double | maxValue, | ||
int | borderFlags = IncludeBorders |
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) | [inline] |
Constructor
Build an interval with from min/max values
minValue | Minimum value |
maxValue | Maximum value |
borderFlags | Include/Exclude borders |
int QwtDoubleInterval::borderFlags | ( | ) | const [inline] |
bool QwtDoubleInterval::contains | ( | double | value | ) | const |
Test if a value is inside an interval
value | Value |
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
value | Value |
QwtDoubleInterval QwtDoubleInterval::intersect | ( | const QwtDoubleInterval & | other | ) | const |
Intersect 2 intervals.
bool QwtDoubleInterval::intersects | ( | const QwtDoubleInterval & | other | ) | const |
Test if two intervals overlap
void QwtDoubleInterval::invalidate | ( | ) | [inline] |
QwtDoubleInterval QwtDoubleInterval::inverted | ( | ) | const |
bool QwtDoubleInterval::isNull | ( | ) | const [inline] |
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
lowerBound | Lower limit |
upperBound | Upper limit |
double QwtDoubleInterval::maxValue | ( | ) | const [inline] |
double QwtDoubleInterval::minValue | ( | ) | const [inline] |
QwtDoubleInterval QwtDoubleInterval::normalized | ( | ) | const |
Normalize the limits of the interval.
If maxValue() < minValue() the limits will be inverted.
int QwtDoubleInterval::operator!= | ( | const QwtDoubleInterval & | other | ) | const [inline] |
Compare two intervals.
QwtDoubleInterval QwtDoubleInterval::operator& | ( | const QwtDoubleInterval & | interval | ) | const [inline] |
Intersection of two intervals
QwtDoubleInterval & QwtDoubleInterval::operator&= | ( | const QwtDoubleInterval & | interval | ) |
Intersects this interval with the given interval.
int QwtDoubleInterval::operator== | ( | const QwtDoubleInterval & | other | ) | const [inline] |
Compare two intervals.
QwtDoubleInterval QwtDoubleInterval::operator| | ( | const QwtDoubleInterval & | interval | ) | const [inline] |
Union of two intervals
QwtDoubleInterval QwtDoubleInterval::operator| | ( | double | value | ) | const [inline] |
Extend an interval
QwtDoubleInterval & QwtDoubleInterval::operator|= | ( | const QwtDoubleInterval & | interval | ) |
Unites this interval with the given interval.
void QwtDoubleInterval::setBorderFlags | ( | int | borderFlags | ) | [inline] |
void QwtDoubleInterval::setInterval | ( | double | minValue, |
double | maxValue, | ||
int | borderFlags = IncludeBorders |
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) | [inline] |
Assign the limits of the interval
minValue | Minimum value |
maxValue | Maximum value |
borderFlags | Include/Exclude borders |
void QwtDoubleInterval::setMaxValue | ( | double | maxValue | ) | [inline] |
Assign the upper limit of the interval
maxValue | Maximum value |
void QwtDoubleInterval::setMinValue | ( | double | minValue | ) | [inline] |
Assign the lower limit of the interval
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.
value | Center |
QwtDoubleInterval QwtDoubleInterval::unite | ( | const QwtDoubleInterval & | other | ) | const |
Unite 2 intervals.
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().