QwtCPointerData(3)

NAME
QwtCPointerData -

Data class containing two pointers to memory blocks of doubles.

SYNOPSIS

#include <qwt_data.h>

Inherits QwtData.

  Public Member Functions
QwtCPointerData (const double *x, const double *y, size_t size)
QwtCPointerData & operator= (const QwtCPointerData &)
virtual QwtData * copy () const
virtual size_t size () const
virtual double x (size_t i) const
virtual double y (size_t i) const
const double * xData () const
const double * yData () const
virtual QwtDoubleRect boundingRect () 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_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::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_t i) 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_t i) 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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