Query: qwtdata
OS: debian
Section: 3
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
QwtData(3) Qwt User's Guide QwtData(3)NAMEQwtData - QwtData defines an interface to any type of curve data.SYNOPSIS#include <qwt_data.h> Inherited by QwtArrayData, QwtCPointerData, and QwtPolygonFData. 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 &) Detailed Description QwtData defines an interface to any type of curve data. Classes, derived from QwtData may: o store the data in almost any type of container o calculate the data on the fly instead of storing it Constructor & Destructor Documentation QwtData::QwtData () Constructor. QwtData::~QwtData () [virtual] Destructor. Member Function Documentation 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 Warning: This is an slow implementation iterating over all points. It is intended to be overloaded by derived classes. In case of auto scaling boundingRect() is called for every replot, so it might be worth to implement a cache, or use x(0), x(size() - 1) for ordered data ... Reimplemented in QwtArrayData, and QwtCPointerData. virtual QwtData* QwtData::copy () const [pure virtual] Returns: Pointer to a copy (virtual copy constructor) Implemented in QwtPolygonFData, QwtArrayData, and QwtCPointerData. QwtData& QwtData::operator= (const QwtData &) [protected] Assignment operator (virtualized) virtual size_t QwtData::size () const [pure virtual] Returns: Size of the data set Implemented in QwtPolygonFData, QwtArrayData, and QwtCPointerData. virtual double QwtData::x (size_ti) const [pure virtual] Return the x value of data point i Parameters: i Index Returns: x X value of data point i Implemented in QwtPolygonFData, QwtArrayData, and QwtCPointerData. virtual double QwtData::y (size_ti) const [pure virtual] Return the y value of data point i Parameters: i Index Returns: y Y value of data point i Implemented in QwtPolygonFData, QwtArrayData, and QwtCPointerData. Author Generated automatically by Doxygen for Qwt User's Guide from the source code. Version 5.2.2 Mon Aug 1 2011 QwtData(3)
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