A class that encapsulates grid data and provides interpolation methods. More...

#include <qwt_grid_raster_data.h>

Inheritance diagram for QwtGridRasterData:

Classes
class	PrivateData

Public Types
enum	ResampleMode { NearestNeighbour , BilinearInterpolation , BicubicInterpolation }
	Resampling algorithm. More...

Public Types inherited from QwtRasterData
enum	Attribute { WithoutGaps = 0x01 }
	Raster data attributes. More...

enum	ConrecFlag { IgnoreAllVerticesOnLevel = 0x01 , IgnoreOutOfRange = 0x02 }
	Flags to modify the contour algorithm . More...

using	ContourLines = QMap< double, QPolygonF >
	Contour lines.

Public Member Functions
	QwtGridRasterData ()
	Constructor. .

virtual	~QwtGridRasterData ()
	Destructor .

void	setResampleMode (ResampleMode mode)
	Set the resample method.

ResampleMode	resampleMode () const
	Get the current resample method.

virtual QwtInterval	interval (Qt::Axis axis) const override final
	Return bounding interval for an axis.

void	setValue (const QVector< double > &x, const QVector< double > &y, const QVector< QVector< double > > &v)
	Set new x-axis, y-axis, and data matrix.

virtual double	value (double x, double y) const override
	Return the value at a raster position.

virtual QRectF	pixelHint (const QRectF &) const override
	Calculate the pixel hint.

int	xSize () const
	Return the size of x-axis.

int	ySize () const
	Return the size of y-axis.

std::pair< int, int >	valueSize () const
	Return the size of the value matrix.

double	atValue (int xIndex, int yIndex) const
	Return the value at specified position in the value matrix.

double	atX (int xIndex) const
	Return the x-axis value at specified index.

double	atY (int yIndex) const
	Return the y-axis value at specified index.

Public Member Functions inherited from QwtRasterData
	QwtRasterData ()
	Constructor.

virtual	~QwtRasterData ()
	Destructor.

void	setAttribute (Attribute, bool on=true)
	Set an attribute.

bool	testAttribute (Attribute) const
	Test an attribute.

virtual void	initRaster (const QRectF &, const QSize &raster)
	Initialize the raster.

virtual void	discardRaster ()
	Discard the raster.

virtual ContourLines	contourLines (const QRectF &rect, const QSize &raster, const QList< double > &levels, ConrecFlags) const
	Calculate contour lines.

Detailed Description

A class that encapsulates grid data and provides interpolation methods.

Member Enumeration Documentation

◆ ResampleMode

enum QwtGridRasterData::ResampleMode

Resampling algorithm.

Enumerator
NearestNeighbour	Return the value from the matrix that is nearest to the requested position.
BilinearInterpolation	Interpolate the value from the distances and values of the 4 surrounding values in the matrix.
BicubicInterpolation	Interpolate the value from the 16 surrounding values in the matrix using hermite bicubic interpolation.

Constructor & Destructor Documentation

◆ QwtGridRasterData()

QwtGridRasterData::QwtGridRasterData ( )

Constructor. .

◆ ~QwtGridRasterData()

QwtGridRasterData::~QwtGridRasterData ( )

virtual

Destructor .

Member Function Documentation

◆ atValue()

double QwtGridRasterData::atValue	(	int	xIndex,
		int	yIndex
	)		const

Return the value at specified position in the value matrix.

◆ atX()

double QwtGridRasterData::atX ( int xIndex ) const

Return the x-axis value at specified index.

◆ atY()

double QwtGridRasterData::atY ( int yIndex ) const

Return the y-axis value at specified index.

◆ interval()

QwtInterval QwtGridRasterData::interval ( Qt::Axis axis ) const

finaloverridevirtual

Return bounding interval for an axis.

Implements QwtRasterData.

◆ pixelHint()

QRectF QwtGridRasterData::pixelHint ( const QRectF & area ) const

overridevirtual

Calculate the pixel hint.

Reimplemented from QwtRasterData.

◆ resampleMode()

QwtGridRasterData::ResampleMode QwtGridRasterData::resampleMode ( ) const

Get the current resample method.

◆ setResampleMode()

void QwtGridRasterData::setResampleMode ( QwtGridRasterData::ResampleMode mode )

Set the resample method.

◆ setValue()

void QwtGridRasterData::setValue	(	const QVector< double > &	x,
		const QVector< double > &	y,
		const QVector< QVector< double > > &	v
	)

Set new x-axis, y-axis, and data matrix.

◆ value()

double QwtGridRasterData::value	(	double	x,
		double	y
	)		const

overridevirtual

Return the value at a raster position.

Implements QwtRasterData.

◆ valueSize()

std::pair< int, int > QwtGridRasterData::valueSize ( ) const

Return the size of the value matrix.

◆ xSize()

int QwtGridRasterData::xSize ( ) const

Return the size of x-axis.

◆ ySize()

int QwtGridRasterData::ySize ( ) const

Return the size of y-axis.

The documentation for this class was generated from the following files:

/home/runner/work/QWT/QWT/src/plot/qwt_grid_raster_data.h
/home/runner/work/QWT/QWT/src/plot/qwt_grid_raster_data.cpp

Classes

Public Types

Public Member Functions