Qwt User's Guide
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Data class containing two pointers to memory blocks of doubles. More...
#include <qwt_point_data.h>
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 i) const |
const double * | xData () const |
const double * | yData () const |
Data class containing two pointers to memory blocks of doubles.
QwtCPointerData::QwtCPointerData | ( | const double * | x, |
const double * | y, | ||
size_t | size | ||
) |
Constructor
x | Array of x values |
y | Array of y values |
size | Size of the x and y arrays |
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.
Implements QwtSeriesData< QPointF >.
QPointF QwtCPointerData::sample | ( | size_t | index | ) | const [virtual] |
Return the sample at position i
index | Index |
Implements QwtSeriesData< QPointF >.
size_t QwtCPointerData::size | ( | ) | const [virtual] |
Implements QwtSeriesData< QPointF >.
const double * QwtCPointerData::xData | ( | ) | const |
const double * QwtCPointerData::yData | ( | ) | const |