Qwt User's Guide: QwtIntervalData Class Reference

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QwtIntervalData Class Reference

Series of samples of a value and an interval. More...

#include <qwt_interval_data.h>

Public Member Functions
	QwtIntervalData ()
	QwtIntervalData (const QwtArray< QwtDoubleInterval > &, const QwtArray< double > &)
	~QwtIntervalData ()
void	setData (const QwtArray< QwtDoubleInterval > &, const QwtArray< double > &)
size_t	size () const
const QwtDoubleInterval &	interval (size_t i) const
double	value (size_t i) const
QwtDoubleRect	boundingRect () const

Detailed Description

Series of samples of a value and an interval.

QwtIntervalData is a series of samples of a value and an interval. F.e. error bars are built from samples [x, y1-y2], while a histogram might consist of [x1-x2, y] samples.

Constructor & Destructor Documentation

QwtIntervalData::QwtIntervalData ( )

Constructor.

QwtIntervalData::QwtIntervalData	(	const QwtArray< QwtDoubleInterval > &	intervals,
		const QwtArray< double > &	values
	)

Constructor.

QwtIntervalData::~QwtIntervalData ( )

Destructor.

Member Function Documentation

QwtDoubleRect QwtIntervalData::boundingRect ( ) const

Calculate the bounding rectangle of the samples

The x coordinates of the rectangle are built from the intervals, the y coordinates from the values.

Returns:: Bounding rectangle

const QwtDoubleInterval & QwtIntervalData::interval ( size_t i ) const [inline]

Interval of a sample

Parameters:

Sample index

Returns:: Interval

See also:: value(), size()

void QwtIntervalData::setData	(	const QwtArray< QwtDoubleInterval > &	intervals,
		const QwtArray< double > &	values
	)

Assign samples.

size_t QwtIntervalData::size ( ) const [inline]

Returns:: Number of samples

double QwtIntervalData::value ( size_t i ) const [inline]

Value of a sample