Qwt User's Guide
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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 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 |
Return the width of an interval. | |
void | setMinValue (double) |
void | setMaxValue (double) |
bool | contains (double value) 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.
Flag indicating if a border is included or excluded
QwtInterval::QwtInterval | ( | ) | [inline] |
QwtInterval::QwtInterval | ( | double | minValue, |
double | maxValue, | ||
BorderFlags | 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 |
QwtInterval::BorderFlags QwtInterval::borderFlags | ( | ) | const [inline] |
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 |
void QwtInterval::invalidate | ( | ) | [inline] |
QwtInterval QwtInterval::inverted | ( | ) | const |
bool QwtInterval::isNull | ( | ) | const [inline] |
bool QwtInterval::isValid | ( | ) | const [inline] |
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 |
double QwtInterval::maxValue | ( | ) | const [inline] |
double QwtInterval::minValue | ( | ) | const [inline] |
QwtInterval QwtInterval::normalized | ( | ) | const |
Normalize the limits of the interval.
If maxValue() < minValue() the limits will be inverted.
bool QwtInterval::operator!= | ( | const QwtInterval & | other | ) | const [inline] |
Compare two intervals.
other | Interval to compare with |
QwtInterval QwtInterval::operator& | ( | const QwtInterval & | other | ) | const [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 |
bool QwtInterval::operator== | ( | const QwtInterval & | other | ) | const [inline] |
Compare two intervals.
other | Interval to compare with |
QwtInterval QwtInterval::operator| | ( | const QwtInterval & | other | ) | const [inline] |
Union of two intervals
other | Interval to unite with |
QwtInterval QwtInterval::operator| | ( | double | value | ) | const [inline] |
QwtInterval & QwtInterval::operator|= | ( | const QwtInterval & | other | ) |
Unite this interval with the given interval.
other | Interval to be united with |
QwtInterval & QwtInterval::operator|= | ( | double | value | ) |
Extend an interval
value | Value |
void QwtInterval::setBorderFlags | ( | BorderFlags | borderFlags | ) | [inline] |
void QwtInterval::setInterval | ( | double | minValue, |
double | maxValue, | ||
BorderFlags | borderFlags = IncludeBorders |
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) | [inline] |
Assign the limits of the interval
minValue | Minimum value |
maxValue | Maximum value |
borderFlags | Include/Exclude borders |
void QwtInterval::setMaxValue | ( | double | maxValue | ) | [inline] |
Assign the upper limit of the interval
maxValue | Maximum value |
void QwtInterval::setMinValue | ( | double | minValue | ) | [inline] |
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 |
double QwtInterval::width | ( | ) | const [inline] |
Return the width of an interval.
The width of invalid intervals is 0.0, otherwise the result is maxValue() - minValue().