QwtCPointerData man page
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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