QwtCPointerData Class Reference

#include <qwt_series_data.h>

Inherits QwtSeriesData< QPointF >.

List of all members.

Public Member Functions
virtual QRectF	boundingRect () const
	QwtCPointerData (const double *x, const double *y, size_t size)
virtual QPointF	sample (size_t i) const
virtual void	setRectOfInterest (const QRectF &)
virtual size_t	size () const
const double *	xData () const
const double *	yData () const
Protected Attributes
QRectF	d_boundingRect

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Detailed Description

Data class containing two pointers to memory blocks of doubles.

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Constructor & Destructor Documentation

QwtCPointerData::QwtCPointerData	(	const double *	x,
		const double *	y,
		size_t	size
	)

Constructor

Parameters:

x	Array of x values
y	Array of y values
size	Size of the x and y arrays

Warning:

The programmer must assure that the memory blocks referenced by the pointers remain valid during the lifetime of the QwtPlotCPointer object.

See also:

QwtPlotCurve::setData(), QwtPlotCurve::setRawSamples()

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Member Function Documentation

QRectF QwtCPointerData::boundingRect

(

)

const [virtual]

Calculate the bounding rect.

The bounding rectangle is calculated once by iterating over all points and is stored for all following requests.

Returns:

Bounding rectangle

Implements QwtSeriesData< QPointF >.

QPointF QwtCPointerData::sample

(

size_t

i

)

const [virtual]

Return the sample at position i

Parameters:

i

Index

Returns:

Sample at position i

Implements QwtSeriesData< QPointF >.

size_t QwtCPointerData::size

(

)

const [virtual]

Returns:

Size of the data set

Implements QwtSeriesData< QPointF >.

const double * QwtCPointerData::xData

(

)

const

Returns:

Array of the x-values

const double * QwtCPointerData::yData

(

)

const

Returns:

Array of the y-values

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Member Data Documentation

QRectF QwtSeriesData< QPointF >::d_boundingRect [mutable, protected, inherited]

Can be used to cache a calculated bounding rectangle.