NAME¶

QwtInterval - A class representing an interval.

SYNOPSIS¶

#include <qwt_interval.h>

Public Types¶

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

Public Member Functions¶

QwtInterval () QwtInterval (double minValue, double maxValue, BorderFlags=IncludeBorders) void setInterval (double minValue, double maxValue, BorderFlags=IncludeBorders) QwtInterval normalized () const QwtInterval inverted () const QwtInterval limited (double minValue, double maxValue) const bool operator== (const QwtInterval &) const bool operator!= (const QwtInterval &) const 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 QwtInterval unite (const QwtInterval &) const QwtInterval operator| (const QwtInterval &) const QwtInterval operator& (const QwtInterval &) const QwtInterval & operator|= (const QwtInterval &) QwtInterval & operator&= (const QwtInterval &) 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

Detailed Description¶

A class representing an interval. The interval is represented by 2 doubles, the lower and the upper limit.

Member Typedef Documentation¶

typedef QFlags< BorderFlag> QwtInterval::BorderFlags¶

Border flags.

Member Enumeration Documentation¶

enum QwtInterval::BorderFlag 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.

Constructor & Destructor Documentation¶

QwtInterval::QwtInterval () [inline]¶

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

QwtInterval::QwtInterval (doubleminValue, doublemaxValue, BorderFlagsborderFlags = IncludeBorders) [inline] Constructor¶

Build an interval with from min/max values Parameters:

Member Function Documentation¶

QwtInterval::BorderFlags QwtInterval::borderFlags () const [inline] Returns:¶

See also:

bool QwtInterval::contains (doublevalue) const Test if a value is inside an interval¶

Parameters: Returns:

QwtInterval QwtInterval::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: See also:

QwtInterval QwtInterval::intersect (const QwtInterval &other) const¶

Intersect 2 intervals.

bool QwtInterval::intersects (const QwtInterval &other) const Test if two intervals overlap¶

void QwtInterval::invalidate () [inline] Invalidate the interval¶

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

QwtInterval QwtInterval::inverted () const Invert the limits of the interval¶

Returns: See also:

bool QwtInterval::isNull () const [inline] Returns:¶

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 (doublelowerBound, doubleupperBound) const Limit the interval, keeping the border modes¶

Parameters: Returns:

double QwtInterval::maxValue () const [inline] Returns:¶

double QwtInterval::minValue () const [inline] Returns:¶

QwtInterval QwtInterval::normalized () const¶

Normalize the limits of the interval. If maxValue() < minValue() the limits will be inverted. Returns: See also:

bool QwtInterval::operator!= (const QwtInterval &other) const [inline]¶

Compare two intervals.

QwtInterval QwtInterval::operator& (const QwtInterval &interval) const [inline] Intersection of two intervals¶

See also:

QwtInterval & QwtInterval::operator&= (const QwtInterval &interval)¶

Intersects this interval with the given interval.

bool QwtInterval::operator== (const QwtInterval &other) const [inline]¶

Compare two intervals.

QwtInterval QwtInterval::operator| (const QwtInterval &interval) const [inline] Union of two intervals¶

See also:

QwtInterval QwtInterval::operator| (doublevalue) const [inline] Extend an interval¶

Parameters: Returns: See also:

QwtInterval & QwtInterval::operator|= (const QwtInterval &interval)¶

Unites this interval with the given interval.

QwtInterval & QwtInterval::operator|= (doublevalue) Extend an interval¶

Parameters: Returns: See also:

void QwtInterval::setBorderFlags ( BorderFlagsborderFlags) [inline] Change the border flags¶

Parameters: See also:

void QwtInterval::setInterval (doubleminValue, doublemaxValue, BorderFlagsborderFlags = IncludeBorders) [inline] Assign the limits of the interval¶

Parameters:

void QwtInterval::setMaxValue (doublemaxValue) [inline] Assign the upper limit of the interval¶

Parameters:

void QwtInterval::setMinValue (doubleminValue) [inline] Assign the lower limit of the interval¶

Parameters:

QwtInterval QwtInterval::symmetrize (doublevalue) const Adjust the limit that is closer to value, so that value becomes the center of the interval.¶

Parameters: Returns:

QwtInterval QwtInterval::unite (const QwtInterval &other) const¶

Unite 2 intervals.

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().¶

See also:

Author¶

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