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Qwt User's Guide
5.2.3
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#include <qwt_double_interval.h>
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| enum | BorderMode { IncludeBorders = 0, ExcludeMinimum = 1, ExcludeMaximum = 2, ExcludeBorders = ExcludeMinimum | ExcludeMaximum } |
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
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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 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 |
| bool QwtDoubleInterval::intersects | ( | const QwtDoubleInterval & | other | ) | const |
Test if two intervals overlap
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| QwtDoubleInterval QwtDoubleInterval::inverted | ( | ) | const |
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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 | ||
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Limit the interval, keeping the border modes
| lowerBound | Lower limit |
| upperBound | Upper limit |
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| QwtDoubleInterval QwtDoubleInterval::normalized | ( | ) | const |
Normalize the limits of the interval.
If maxValue() < minValue() the limits will be inverted.
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Intersection of two intervals
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Union of two intervals
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Extend an interval
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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 |
| 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 |
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Return the width of an interval The width of invalid intervals is 0.0, otherwise the result is maxValue() - minValue().
1.8.1