QwtCPointerData Class Reference

Data class containing two pointers to memory blocks of doubles. More...

#include <qwt_series_data.h>

Inheritance diagram for QwtCPointerData:
Inheritance graph
[legend]

List of all members.

Public Member Functions

 QwtCPointerData (const double *x, const double *y, size_t size)
virtual QRectF boundingRect () const
virtual size_t size () const
virtual QPointF sample (size_t i) const
const double * xData () 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_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 rect.

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  i  )  const [virtual]

Return the sample at position i

Parameters:
i 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
Generated on Sun Nov 21 12:01:32 2010 for Qwt User's Guide by  doxygen 1.6.3