Qwt User's Guide 5.2.2
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QwtData defines an interface to any type of curve data. More...
#include <qwt_data.h>
Public Member Functions | |
virtual QwtDoubleRect | boundingRect () const |
virtual QwtData * | copy () const =0 |
QwtData () | |
virtual size_t | size () const =0 |
virtual double | x (size_t i) const =0 |
virtual double | y (size_t i) const =0 |
virtual | ~QwtData () |
Protected Member Functions | |
QwtData & | operator= (const QwtData &) |
QwtData defines an interface to any type of curve data.
Classes, derived from QwtData may:
QwtData::QwtData | ( | ) |
Constructor.
QwtData::~QwtData | ( | ) | [virtual] |
Destructor.
QwtDoubleRect QwtData::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 in QwtArrayData, and QwtCPointerData.
virtual QwtData* QwtData::copy | ( | ) | const [pure virtual] |
Implemented in QwtPolygonFData, QwtArrayData, and QwtCPointerData.
virtual size_t QwtData::size | ( | ) | const [pure virtual] |
Implemented in QwtPolygonFData, QwtArrayData, and QwtCPointerData.
virtual double QwtData::x | ( | size_t | i | ) | const [pure virtual] |
Return the x value of data point i
i | Index |
Implemented in QwtPolygonFData, QwtArrayData, and QwtCPointerData.
virtual double QwtData::y | ( | size_t | i | ) | const [pure virtual] |
Return the y value of data point i
i | Index |
Implemented in QwtPolygonFData, QwtArrayData, and QwtCPointerData.