Man page - qwtcpointerdata(3)

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Manual

QwtCPointerData

NAME
SYNOPSIS
Public Member Functions
Additional Inherited Members
Detailed Description
Constructor & Destructor Documentation
QwtCPointerData::QwtCPointerData (const double * x, const double * y,size_t size)
Member Function Documentation
QRectF QwtCPointerData::boundingRect () const [virtual]
QPointF QwtCPointerData::sample (size_t index) const [virtual]
size_t QwtCPointerData::size () const [virtual]
const double * QwtCPointerData::xData () const
const double * QwtCPointerData::yData () const
Author

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NAME

QwtCPointerData - Data class containing two pointers to memory blocks of doubles.

SYNOPSIS

#include <qwt_point_data.h>

Inherits QwtSeriesData< QPointF > .

Public Member Functions

QwtCPointerData (const double *x, const double *y, size_t size )
virtual QRectF boundingRect () const
Calculate the bounding rectangle.
virtual size_t size () const
virtual QPointF sample (size_t index) const
const double * xData () const
const double * yData () const

Additional Inherited Members

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

Author

Generated automatically by Doxygen for Qwt User’s Guide from the source code.

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