SYNOPSIS

#include <qwt_data.h>

Inherits QwtData.

Public Member Functions

virtual QwtDoubleRect boundingRect () const

virtual QwtData * copy () const

QwtCPointerData & operator= (const QwtCPointerData &)

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

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

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.

QwtCPointerData & QwtCPointerData::operator= (const QwtCPointerData &data)

Assignment.

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 () constReturns:

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 () constReturns:

Array of the y-values

Author

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