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

NAME

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

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 () 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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Mon Aug 1 2011 Version 5.2.2