| Qwt User's Guide
    6.1.3
    | 
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.  More... | |
| QwtInterval (double minValue, double maxValue, BorderFlags=IncludeBorders) | |
| void | setInterval (double minValue, double maxValue, BorderFlags=IncludeBorders) | 
| QwtInterval | normalized () const | 
| Normalize the limits of the interval.  More... | |
| QwtInterval | inverted () const | 
| QwtInterval | limited (double minValue, double maxValue) const | 
| bool | operator== (const QwtInterval &) const | 
| Compare two intervals.  More... | |
| bool | operator!= (const QwtInterval &) const | 
| Compare two intervals.  More... | |
| void | setBorderFlags (BorderFlags) | 
| BorderFlags | borderFlags () const | 
| double | minValue () const | 
| double | maxValue () const | 
| double | width () const | 
| Return the width of an interval.  More... | |
| void | setMinValue (double) | 
| void | setMaxValue (double) | 
| bool | contains (double value) const | 
| bool | intersects (const QwtInterval &) const | 
| Test if two intervals overlap.  More... | |
| QwtInterval | intersect (const QwtInterval &) const | 
| Intersect 2 intervals.  More... | |
| QwtInterval | unite (const QwtInterval &) const | 
| Unite 2 intervals. | |
| QwtInterval | operator| (const QwtInterval &) const | 
| QwtInterval | operator& (const QwtInterval &) const | 
| Intersection of two intervals.  More... | |
| QwtInterval & | operator|= (const QwtInterval &) | 
| Unite this interval with the given interval.  More... | |
| QwtInterval & | operator&= (const QwtInterval &) | 
| Intersect this interval with the given interval.  More... | |
| QwtInterval | extend (double value) const | 
| Extend the interval.  More... | |
| 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.
Flag indicating if a border is included or excluded
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Constructor
Build an interval with from min/max values
| minValue | Minimum value | 
| maxValue | Maximum value | 
| borderFlags | Include/Exclude borders | 
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| bool QwtInterval::contains | ( | double | value | ) | const | 
Test if a value is inside an interval
| value | Value | 
| 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 | 
| QwtInterval QwtInterval::intersect | ( | const QwtInterval & | other | ) | const | 
Intersect 2 intervals.
| other | Interval to be intersect with | 
| bool QwtInterval::intersects | ( | const QwtInterval & | other | ) | const | 
Test if two intervals overlap.
| other | Interval | 
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| QwtInterval QwtInterval::inverted | ( | ) | const | 
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A interval is valid when minValue() <= maxValue(). In case of QwtInterval::ExcludeBorders it is true when minValue() < maxValue()
| QwtInterval QwtInterval::limited | ( | double | lowerBound, | 
| double | upperBound | ||
| ) | const | 
Limit the interval, keeping the border modes
| lowerBound | Lower limit | 
| upperBound | Upper limit | 
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| QwtInterval QwtInterval::normalized | ( | ) | const | 
Normalize the limits of the interval.
If maxValue() < minValue() the limits will be inverted.
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Compare two intervals.
| other | Interval to compare with | 
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 | inline | 
Intersection of two intervals.
| other | Interval to intersect with | 
| QwtInterval & QwtInterval::operator&= | ( | const QwtInterval & | other | ) | 
Intersect this interval with the given interval.
| other | Interval to be intersected with | 
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Compare two intervals.
| other | Interval to compare with | 
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Union of two intervals
| other | Interval to unite with | 
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| QwtInterval & QwtInterval::operator|= | ( | const QwtInterval & | other | ) | 
Unite this interval with the given interval.
| other | Interval to be united with | 
| QwtInterval & QwtInterval::operator|= | ( | double | value | ) | 
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Assign the limits of the interval
| minValue | Minimum value | 
| maxValue | Maximum value | 
| borderFlags | Include/Exclude borders | 
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Assign the upper limit of the interval
| maxValue | Maximum value | 
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Assign the lower limit of the interval
| minValue | Minimum value | 
| 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 | 
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Return the width of an interval.
The width of invalid intervals is 0.0, otherwise the result is maxValue() - minValue().