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Qwt User's Guide 6.3.0
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A class representing an interval. More...
#include <qwt_interval.h>
Public Types | |
| enum | BorderFlag { IncludeBorders = 0x00 , ExcludeMinimum = 0x01 , ExcludeMaximum = 0x02 , ExcludeBorders = ExcludeMinimum | ExcludeMaximum } |
| typedef QFlags< BorderFlag > | BorderFlags |
| Border flags. | |
Public Member Functions | |
| QwtInterval () | |
| Default Constructor. | |
| QwtInterval (double minValue, double maxValue, BorderFlags=IncludeBorders) | |
| void | setInterval (double minValue, double maxValue, BorderFlags=IncludeBorders) |
| QwtInterval | normalized () const |
| Normalize the limits of the interval. | |
| QwtInterval | inverted () const |
| QwtInterval | limited (double lowerBound, double upperBound) const |
| bool | operator== (const QwtInterval &) const |
| Compare two intervals. | |
| bool | operator!= (const QwtInterval &) const |
| Compare two intervals. | |
| void | setBorderFlags (BorderFlags) |
| BorderFlags | borderFlags () const |
| double | minValue () const |
| double | maxValue () const |
| double | width () const |
| Return the width of an interval. | |
| long double | widthL () const |
| Return the width of an interval as long double. | |
| void | setMinValue (double) |
| void | setMaxValue (double) |
| bool | contains (double value) const |
| bool | contains (const QwtInterval &) const |
| bool | intersects (const QwtInterval &) const |
| Test if two intervals overlap. | |
| QwtInterval | intersect (const QwtInterval &) const |
| Intersect 2 intervals. | |
| QwtInterval | unite (const QwtInterval &) const |
| Unite 2 intervals. | |
| QwtInterval | operator| (const QwtInterval &) const |
| QwtInterval | operator& (const QwtInterval &) const |
| Intersection of two intervals. | |
| QwtInterval & | operator|= (const QwtInterval &) |
| Unite this interval with the given interval. | |
| QwtInterval & | operator&= (const QwtInterval &) |
| Intersect this interval with the given interval. | |
| QwtInterval | extend (double value) const |
| Extend the interval. | |
| QwtInterval | operator| (double) const |
| QwtInterval & | operator|= (double) |
| bool | isValid () const |
| bool | isNull () const |
| void | invalidate () |
| QwtInterval | symmetrize (double value) const |
A class representing an interval.
The interval is represented by 2 doubles, the lower and the upper limit.
Definition at line 22 of file qwt_interval.h.
| typedef QFlags<BorderFlag > QwtInterval::BorderFlags |
Border flags.
An ORed combination of BorderFlag values.
Definition at line 45 of file qwt_interval.h.
Flag indicating if a border is included or excluded
Definition at line 29 of file qwt_interval.h.
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Default Constructor.
Creates an invalid interval [0.0, -1.0]
Definition at line 112 of file qwt_interval.h.
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Constructor
Build an interval with from min/max values
| minValue | Minimum value |
| maxValue | Maximum value |
| borderFlags | Include/Exclude borders |
Definition at line 128 of file qwt_interval.h.
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| bool QwtInterval::contains | ( | const QwtInterval & | interval | ) | const |
Test if an interval is inside an interval
| interval | Interval |
Definition at line 90 of file qwt_interval.cpp.
| bool QwtInterval::contains | ( | double | value | ) | const |
Test if a value is inside an interval
| value | Value |
Definition at line 67 of file qwt_interval.cpp.
| QwtInterval QwtInterval::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 |
Definition at line 363 of file qwt_interval.cpp.
| QwtInterval QwtInterval::intersect | ( | const QwtInterval & | other | ) | const |
Intersect 2 intervals.
| other | Interval to be intersect with |
Definition at line 186 of file qwt_interval.cpp.
| bool QwtInterval::intersects | ( | const QwtInterval & | other | ) | const |
Test if two intervals overlap.
| other | Interval |
Definition at line 277 of file qwt_interval.cpp.
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Invalidate the interval
The limits are set to interval [0.0, -1.0]
Definition at line 325 of file qwt_interval.h.
| QwtInterval QwtInterval::inverted | ( | ) | const |
Invert the limits of the interval
Definition at line 48 of file qwt_interval.cpp.
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Definition at line 314 of file qwt_interval.h.
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A interval is valid when minValue() <= maxValue(). In case of QwtInterval::ExcludeBorders it is true when minValue() < maxValue()
Definition at line 210 of file qwt_interval.h.
| QwtInterval QwtInterval::limited | ( | double | lowerBound, |
| double | upperBound ) const |
Limit the interval, keeping the border modes
| lowerBound | Lower limit |
| upperBound | Upper limit |
Definition at line 336 of file qwt_interval.cpp.
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Definition at line 198 of file qwt_interval.h.
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Definition at line 192 of file qwt_interval.h.
| QwtInterval QwtInterval::normalized | ( | ) | const |
Normalize the limits of the interval.
If maxValue() < minValue() the limits will be inverted.
Definition at line 29 of file qwt_interval.cpp.
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Compare two intervals.
| other | Interval to compare with |
Definition at line 296 of file qwt_interval.h.
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Intersection of two intervals.
| other | Interval to intersect with |
Definition at line 258 of file qwt_interval.h.
| QwtInterval & QwtInterval::operator&= | ( | const QwtInterval & | other | ) |
Intersect this interval with the given interval.
| other | Interval to be intersected with |
Definition at line 265 of file qwt_interval.cpp.
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Compare two intervals.
| other | Interval to compare with |
Definition at line 284 of file qwt_interval.h.
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Union of two intervals
| other | Interval to unite with |
Definition at line 272 of file qwt_interval.h.
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Extend an interval
| value | Value |
Definition at line 308 of file qwt_interval.h.
| QwtInterval & QwtInterval::operator|= | ( | const QwtInterval & | other | ) |
Unite this interval with the given interval.
| other | Interval to be united with |
Definition at line 253 of file qwt_interval.cpp.
| QwtInterval & QwtInterval::operator|= | ( | double | value | ) |
Extend an interval
| value | Value |
Definition at line 380 of file qwt_interval.cpp.
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Change the border flags
| borderFlags | Or'd BorderMode flags |
Definition at line 157 of file qwt_interval.h.
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Assign the limits of the interval
| minValue | Minimum value |
| maxValue | Maximum value |
| borderFlags | Include/Exclude borders |
Definition at line 143 of file qwt_interval.h.
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Assign the upper limit of the interval
| maxValue | Maximum value |
Definition at line 186 of file qwt_interval.h.
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Assign the lower limit of the interval
| minValue | Minimum value |
Definition at line 176 of file qwt_interval.h.
| QwtInterval QwtInterval::symmetrize | ( | double | value | ) | const |
Adjust the limit that is closer to value, so that value becomes the center of the interval.
| value | Center |
Definition at line 317 of file qwt_interval.cpp.
| QwtInterval QwtInterval::unite | ( | const QwtInterval & | other | ) | const |
Unite 2 intervals.
Definition at line 123 of file qwt_interval.cpp.
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Return the width of an interval.
The width of invalid intervals is 0.0, otherwise the result is maxValue() - minValue().
Definition at line 227 of file qwt_interval.h.
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Return the width of an interval as long double.
The width of invalid intervals is 0.0, otherwise the result is maxValue() - minValue().
Definition at line 241 of file qwt_interval.h.