QwtDoubleInterval (3)

#include <qwt_double_interval.h>

Public Types

enum BorderMode { IncludeBorders = 0, ExcludeMinimum = 1, ExcludeMaximum = 2, ExcludeBorders = ExcludeMinimum | ExcludeMaximum }

Public Member Functions

QwtDoubleInterval ()

QwtDoubleInterval (double minValue, double maxValue, int borderFlags=IncludeBorders)

int borderFlags () const

bool contains (double value) const

QwtDoubleInterval extend (double value) const

QwtDoubleInterval intersect (const QwtDoubleInterval &) const

bool intersects (const QwtDoubleInterval &) const

void invalidate ()

QwtDoubleInterval inverted () const

bool isNull () const

bool isValid () const

QwtDoubleInterval limited (double minValue, double maxValue) const

double maxValue () const

double minValue () const

QwtDoubleInterval normalized () const

int operator!= (const QwtDoubleInterval &) const

QwtDoubleInterval operator& (const QwtDoubleInterval &) const

QwtDoubleInterval & operator&= (const QwtDoubleInterval &)

int operator== (const QwtDoubleInterval &) const

QwtDoubleInterval operator| (const QwtDoubleInterval &) const

QwtDoubleInterval operator| (double) const

QwtDoubleInterval & operator|= (const QwtDoubleInterval &)

QwtDoubleInterval & operator|= (double)

void setBorderFlags (int)

void setInterval (double minValue, double maxValue, int borderFlags=IncludeBorders)

void setMaxValue (double)

void setMinValue (double)

QwtDoubleInterval symmetrize (double value) const

QwtDoubleInterval unite (const QwtDoubleInterval &) const

double width () const

A class representing an interval.

The interval is represented by 2 doubles, the lower and the upper limit.

enum \fBQwtDoubleInterval::BorderMode\fP

Flag indicating if a border is included/excluded from an interval

• 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

See also:

setBorderMode(), testBorderMode()

QwtDoubleInterval::QwtDoubleInterval ()\fC [inline]\fP

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

See also:

setInterval(), isValid()

QwtDoubleInterval::QwtDoubleInterval (doubleminValue, doublemaxValue, intborderFlags = \fCIncludeBorders\fP)\fC [inline]\fP

Constructor

Build an interval with from min/max values

Parameters:

minValue Minimum value

maxValue Maximum value

borderFlags Include/Exclude borders

int QwtDoubleInterval::borderFlags () const\fC [inline]\fP

Returns:

Border flags

See also:

setBorderFlags()

bool QwtDoubleInterval::contains (doublevalue) const

Test if a value is inside an interval

Parameters:

value Value

Returns:

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

\fBQwtDoubleInterval\fP QwtDoubleInterval::extend (doublevalue) 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

Parameters:

value Value

See also:

isValid()

bool QwtDoubleInterval::intersects (const \fBQwtDoubleInterval\fP &other) const

Test if two intervals overlap

void QwtDoubleInterval::invalidate ()\fC [inline]\fP

Invalidate the interval

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

See also:

isValid()

\fBQwtDoubleInterval\fP QwtDoubleInterval::inverted () const

Invert the limits of the interval

Returns:

Inverted interval

See also:

normalized()

bool QwtDoubleInterval::isNull () const\fC [inline]\fP

Returns:

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

bool QwtDoubleInterval::isValid () const\fC [inline]\fP

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

\fBQwtDoubleInterval\fP QwtDoubleInterval::limited (doublelowerBound, doubleupperBound) const

Limit the interval, keeping the border modes

Parameters:

lowerBound Lower limit

upperBound Upper limit

Returns:

Limited interval

double QwtDoubleInterval::maxValue () const\fC [inline]\fP

Returns:

Upper limit of the interval

double QwtDoubleInterval::minValue () const\fC [inline]\fP

Returns:

Lower limit of the interval

\fBQwtDoubleInterval\fP QwtDoubleInterval::normalized () const

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

Returns:

Normalized interval

See also:

isValid(), inverted()

\fBQwtDoubleInterval\fP QwtDoubleInterval::operator& (const \fBQwtDoubleInterval\fP &interval) const\fC [inline]\fP

Intersection of two intervals

See also:

intersect()

\fBQwtDoubleInterval\fP QwtDoubleInterval::operator| (const \fBQwtDoubleInterval\fP &interval) const\fC [inline]\fP

Union of two intervals

See also:

unite()

\fBQwtDoubleInterval\fP QwtDoubleInterval::operator| (doublevalue) const\fC [inline]\fP

Extend an interval

See also:

extend()

void QwtDoubleInterval::setBorderFlags (intborderFlags)\fC [inline]\fP

Change the border flags

Parameters:

borderFlags Or'd BorderMode flags

See also:

borderFlags()

void QwtDoubleInterval::setInterval (doubleminValue, doublemaxValue, intborderFlags = \fCIncludeBorders\fP)\fC [inline]\fP

Assign the limits of the interval

Parameters:

minValue Minimum value

maxValue Maximum value

borderFlags Include/Exclude borders

void QwtDoubleInterval::setMaxValue (doublemaxValue)\fC [inline]\fP

Assign the upper limit of the interval

Parameters:

maxValue Maximum value

void QwtDoubleInterval::setMinValue (doubleminValue)\fC [inline]\fP

Assign the lower limit of the interval

Parameters:

minValue Minimum value

\fBQwtDoubleInterval\fP QwtDoubleInterval::symmetrize (doublevalue) const

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

double QwtDoubleInterval::width () const\fC [inline]\fP

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

See also:

isValid()

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