Referencia de la Clase QwtRasterData

QwtRasterData defines an interface to any type of raster data. Más...

#include <qwt_raster_data.h>

Diagrama de herencias de QwtRasterData

Lista de todos los miembros.

Clases
class	Contour3DPoint
class	ContourPlane
Tipos públicos
enum	ConrecAttribute { IgnoreAllVerticesOnLevel = 1, IgnoreOutOfRange = 2 }
typedef QMap< double, QwtArray < QwtDoublePoint > >	ContourLines
Métodos públicos
	QwtRasterData ()
	QwtRasterData (const QwtDoubleRect &)
virtual	~QwtRasterData ()
virtual QwtRasterData *	copy () const =0
	Clone the data.
virtual void	setBoundingRect (const QwtDoubleRect &)
QwtDoubleRect	boundingRect () const
virtual QSize	rasterHint (const QwtDoubleRect &) const
	Find the raster of the data for an area.
virtual void	initRaster (const QwtDoubleRect &, const QSize &raster)
	Initialize a raster.
virtual void	discardRaster ()
	Discard a raster.
virtual double	value (double x, double y) const =0
virtual QwtDoubleInterval	range () const =0
virtual ContourLines	contourLines (const QwtDoubleRect &rect, const QSize &raster, const QValueList< double > &levels, int flags) const

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Descripción detallada

QwtRasterData defines an interface to any type of raster data.

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Documentación de los 'Typedef' miembros de la clase

typedef QMap<double, QwtArray<QwtDoublePoint> > QwtRasterData::ContourLines

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Documentación de las enumeraciones miembro de la clase

enum QwtRasterData::ConrecAttribute

Valores de enumeraciones:

IgnoreAllVerticesOnLevel
IgnoreOutOfRange

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Documentación del constructor y destructor

QwtRasterData::QwtRasterData

(

)

QwtRasterData::QwtRasterData

(

const QwtDoubleRect &

boundingRect

)

QwtRasterData::~QwtRasterData

(

)

[virtual]

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Documentación de las funciones miembro

QwtDoubleRect QwtRasterData::boundingRect

(

)

const

QwtRasterData::ContourLines QwtRasterData::contourLines	(	const QwtDoubleRect &	rect,
		const QSize &	raster,
		const QValueList< double > &	levels,
		int	flags
	)		const [virtual]

Calculate contour lines

An adaption of CONREC, a simple contouring algorithm. http://astronomy.swin.edu.au/~pbourke/projection/conrec

virtual QwtRasterData* QwtRasterData::copy

(

)

const [pure virtual]

Clone the data.

Implementado en QwtPlotSpectrogram::PrivateData::DummyData.

void QwtRasterData::discardRaster

(

)

[virtual]

Discard a raster.

After the composition of an image QwtPlotSpectrogram calls discardRaster().

The default implementation does nothing, but if data has been loaded in initRaster(), it could deleted now.

Ver también:

initRaster(), value()

void QwtRasterData::initRaster	(	const QwtDoubleRect &	,
		const QSize &	raster
	)		[virtual]

Initialize a raster.

Before the composition of an image QwtPlotSpectrogram calls initRaster, announcing the area and its resolution that will be requested.

The default implementation does nothing, but for data sets that are stored in files, it might be good idea to reimplement initRaster, where the data is resampled and loaded into memory.

Parámetros:

rect	Area of the raster
raster	Number of horizontal and vertical pixels

Ver también:

initRaster(), value()

virtual QwtDoubleInterval QwtRasterData::range

(

)

const [pure virtual]

Devuelve:

the range of the values

Implementado en QwtPlotSpectrogram::PrivateData::DummyData.

QSize QwtRasterData::rasterHint

(

const QwtDoubleRect &

)

const [virtual]

Find the raster of the data for an area.

The resolution is the number of horizontal and vertical pixels that the data can return for an area. An invalid resolution indicates that the data can return values for any detail level.

The resolution will limit the size of the image that is rendered from the data. F.e. this might be important when printing a spectrogram to a A0 printer with 600 dpi.

The default implementation returns an invalid resolution (size)

Parámetros:

rect	In most implementations the resolution of the data doesn't depend on the requested rectangle.

Devuelve:

Resolution, as number of horizontal and vertical pixels

void QwtRasterData::setBoundingRect

(

const QwtDoubleRect &

boundingRect

)

[virtual]

virtual double QwtRasterData::value	(	double	x,
		double	y
	)		const [pure virtual]

Devuelve:

the value at a raster position

Implementado en QwtPlotSpectrogram::PrivateData::DummyData.

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La documentación para esta clase fue generada a partir de los siguientes ficheros:

• src/qwt/src/qwt_raster_data.h
• src/qwt/src/qwt_raster_data.cpp