QwtCPointerData3
Data class containing two pointers to memory blocks of doubles.
Usage
#include <qwt_point_data.h>
Inherits QwtSeriesData< QPointF >.
Public Member Functions
QwtCPointerData (const double *x, const double *y, size_t size)
virtual QRectF boundingRect () const
Calculate the bounding rectangle. virtual size_t size () const
virtual QPointF sample (size_t index) const
const double * xData () 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_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 rectangle. 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 index) const [virtual]
Return the sample at position i
Parameters:
index 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
Releases
11 releases since Debian 3.1 (Sarge); the text changed 5 times.