QwtCPointerData Class Reference

Data class containing two pointers to memory blocks of doubles. More...

#include <qwt_point_data.h>

Inheritance diagram for QwtCPointerData:

Public Member Functions
	QwtCPointerData (const double *x, const double *y, size_t size)
virtual QRectF	boundingRect () const
	Calculate the bounding rectangle. More...
virtual size_t	size () const
virtual QPointF	sample (size_t i) const
const double *	xData () const
const double *	yData () const
Public Member Functions inherited from QwtSeriesData< QPointF >
	QwtSeriesData ()
	Constructor.
virtual	~QwtSeriesData ()
	Destructor.
virtual void	setRectOfInterest (const QRectF &rect)

Additional Inherited Members
Protected Attributes inherited from QwtSeriesData< QPointF >
QRectF	d_boundingRect
	Can be used to cache a calculated bounding rectangle.

Detailed Description

Data class containing two pointers to memory blocks of doubles.

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()

Member Function Documentation

QRectF QwtCPointerData::boundingRect ( ) const

virtual

Calculate the bounding rectangle.

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  index ) const

virtual

Return the sample at position i

Parameters

index

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