QwtInterval man page

enum BorderFlag { IncludeBorders = 0x00, ExcludeMinimum = 0x01, ExcludeMaximum = 0x02, ExcludeBorders = ExcludeMinimum | ExcludeMaximum }
typedef QFlags< BorderFlag > BorderFlags
Border flags.

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

Flag indicating if a border is included or excluded

See also:

Enumerator

IncludeBorders

Min/Max values are inside the interval.

ExcludeMinimum

Min value is not included in the interval.

ExcludeMaximum

Max value is not included in the interval.

ExcludeBorders

Min/Max values are not included in the interval.

Default Constructor. Creates an invalid interval [0.0, -1.0]

See also:

Constructor

Build an interval with from min/max values

Parameters:

minValue Minimum value
maxValue Maximum value
borderFlags Include/Exclude borders

Returns:

Border flags

See also:

setBorderFlags()

Test if a value is inside an interval

Parameters:

value Value

Returns:

true, if value >= minValue() && value <= maxValue()

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

Parameters:

value Value

Returns:

extended interval

See also:

isValid()

Intersect 2 intervals.

Parameters:

other Interval to be intersect with

Returns:

Intersection

Test if two intervals overlap.

Parameters:

other Interval

Returns:

True, when the intervals are intersecting

Invalidate the interval

The limits are set to interval [0.0, -1.0]

See also:

Invert the limits of the interval

Returns:

Inverted interval

See also:

normalized()

Returns:

true, if isValid() && (minValue() >= maxValue())

A interval is valid when minValue() <= maxValue(). In case of QwtInterval::ExcludeBorders it is true when minValue() < maxValue()

Returns:

True, when the interval is valid

Limit the interval, keeping the border modes

Parameters:

lowerBound Lower limit
upperBound Upper limit

Returns:

Limited interval

Returns:

Upper limit of the interval

Returns:

Lower limit of the interval

Normalize the limits of the interval. If maxValue() < minValue() the limits will be inverted.

Returns:

Normalized interval

See also:

isValid(), inverted()

Compare two intervals.

Parameters:

other Interval to compare with

Returns:

True, when this and other are not equal

Intersection of two intervals.

Parameters:

other Interval to intersect with

Returns:

Intersection of this and other

See also:

intersect()

Intersect this interval with the given interval.

Parameters:

other Interval to be intersected with

Returns:

This interval

Compare two intervals.

Parameters:

other Interval to compare with

Returns:

True, when this and other are equal

Union of two intervals

Parameters:

other Interval to unite with

Returns:

Union of this and other

See also:

unite()

Extend an interval

Parameters:

value Value

Returns:

Extended interval

See also:

extend()

Unite this interval with the given interval.

Parameters:

other Interval to be united with

Returns:

This interval

Extend an interval

Parameters:

value Value

Returns:

Reference of the extended interval

See also:

extend()

Change the border flags

Parameters:

borderFlags Or'd BorderMode flags

See also:

borderFlags()

Assign the limits of the interval

Parameters:

minValue Minimum value
maxValue Maximum value
borderFlags Include/Exclude borders

Assign the upper limit of the interval

Parameters:

maxValue Maximum value

Assign the lower limit of the interval

Parameters:

minValue Minimum value

Adjust the limit that is closer to value, so that value becomes the center of the interval.

Parameters:

value Center

Returns:

Interval with value as center

Return the width of an interval. The width of invalid intervals is 0.0, otherwise the result is maxValue() - minValue().

Returns:

Interval width

See also:

isValid()