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QwtCPointerData(3) Qwt User's Guide QwtCPointerData(3)

NAME

QwtCPointerData -

SYNOPSIS

#include <qwt_data.h>

Inherits QwtData.

Public Member Functions


QwtCPointerData (const double *x, const double *y, size_t size)
virtual QwtDoubleRect boundingRect () const
virtual QwtData * copy () const
QwtCPointerData & operator= (const QwtCPointerData &)
virtual size_t size () const
virtual double x (size_t i) const
const double * xData () const
virtual double y (size_t i) 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_tsize)

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::setRawData()

Member Function Documentation

QwtDoubleRect QwtCPointerData::boundingRect () const [virtual]

Returns the bounding rectangle of the data. If there is no bounding rect, like for empty data the rectangle is invalid: QwtDoubleRect::isValid() == false

Reimplemented from QwtData.

QwtData * QwtCPointerData::copy () const [virtual]

Returns:
Pointer to a copy (virtual copy constructor)

Implements QwtData.

size_t QwtCPointerData::size () const [virtual]

Returns:
Size of the data set

Implements QwtData.

double QwtCPointerData::x (size_ti) const [virtual]

Return the x value of data point i

Parameters:

i Index

Returns:

x X value of data point i

Implements QwtData.

const double * QwtCPointerData::xData () const

Returns:
Array of the x-values

double QwtCPointerData::y (size_ti) const [virtual]

Return the y value of data point i

Parameters:

i Index

Returns:

y Y value of data point i

Implements QwtData.

const double * QwtCPointerData::yData () const

Returns:
Array of the y-values

Author

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Tue Nov 20 2012 Version 5.2.3