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. | |
bool | operator!= (const QwtInterval &) const |
Compare two intervals. | |
void | setBorderFlags (BorderFlags) |
BorderFlags | borderFlags () const |
double | minValue () const |
double | maxValue () const |
double | width () const |
void | setMinValue (double) |
void | setMaxValue (double) |
bool | contains (double value) const |
bool | intersects (const QwtInterval &) const |
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 |
QwtInterval & | operator|= (const QwtInterval &) |
Unites this interval with the given interval. | |
QwtInterval & | operator&= (const QwtInterval &) |
Intersects this interval with the given interval. | |
QwtInterval | extend (double value) const |
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 |
bool QwtInterval::intersects | ( | const QwtInterval & | other | ) | const |
Test if two intervals overlap
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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 | ||
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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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Intersection of two intervals
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Union of two intervals
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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().