Class which provides non-linear axis labelling using a CoordinateSystem. More...

#include <WCCSNLAxisLabeller.h>

Inheritance diagram for casa::WCCSNLAxisLabeller:

Public Member Functions
	WCCSNLAxisLabeller ()
	Constructor.
virtual	~WCCSNLAxisLabeller ()
	Destructor.
virtual Bool	draw (const WCRefreshEvent &ev)
	Draw axis labels for the provided WorldCanvas refresh event.
virtual void	invalidate ()
	Invalidate/return any cached drawing list.
virtual void	setCoordinateSystem (const CoordinateSystem &coordsys)
	Install the CoordinateSystem to use.
void	setWorldRanges (const Vector< Double > &worldMin, const Vector< Double > &worldMax, const Vector< String > &units)
	Set the world min and max ranges (and their associated units) to be used by the CoordinateSystem::toMix computations.
virtual void	setDefaultOptions ()
	install the default options for this DisplayData
virtual Bool	setOptions (const Record &rec, Record &updatedOptions)
	apply options stored in rec to the DisplayData; return value True means a refresh is needed.
virtual Record	getOptions () const
	retrieve the current and default options and parameter types.
Private Attributes
Bool	itsValid
	Is the drawlist state below valid?
uInt	itsDrawListNumber
	our drawlist number
AttributeBuffer	itsDrawStateBuffer
	attribute buffer that suits the drawlist we have made
WorldCanvas *	itsLastWorldCanvas
	last WorldCanvas drawn upon

Detailed Description

Class which provides non-linear axis labelling using a CoordinateSystem.

Synopsis

This class implements the interface defined in WCCSAxisLabeller to provide arbitrary non-linear axis labelling, using coordinate transformations provided by a supplied CoordinateSystem.

Definition at line 48 of file WCCSNLAxisLabeller.h.

Constructor & Destructor Documentation

casa::WCCSNLAxisLabeller::WCCSNLAxisLabeller ( )

Constructor.

virtual casa::WCCSNLAxisLabeller::~WCCSNLAxisLabeller ( ) [virtual]

Destructor.

Member Function Documentation

virtual Bool casa::WCCSNLAxisLabeller::draw ( const WCRefreshEvent & ev ) [virtual]

Draw axis labels for the provided WorldCanvas refresh event.

Note: it is the responsibility of the caller to assure that this object is invalidated (or destroyed) before the WorldCanvas corresponding to ev gets destroyed, so that any cached axis drawing which the WC is holding for us can be deleted properly.

Implements casa::WCAxisLabeller.

virtual Record casa::WCCSNLAxisLabeller::getOptions ( ) const [virtual]

retrieve the current and default options and parameter types.

Reimplemented from casa::WCCSAxisLabeller.

virtual void casa::WCCSNLAxisLabeller::invalidate ( ) [virtual]

Invalidate/return any cached drawing list.

Reimplemented from casa::WCAxisLabeller.

virtual void casa::WCCSNLAxisLabeller::setCoordinateSystem ( const CoordinateSystem & coordsys ) [virtual]

Install the CoordinateSystem to use.

Reimplemented from casa::WCCSAxisLabeller.

virtual void casa::WCCSNLAxisLabeller::setDefaultOptions ( ) [virtual]

install the default options for this DisplayData

Reimplemented from casa::WCCSAxisLabeller.

virtual Bool casa::WCCSNLAxisLabeller::setOptions	(	const Record &	rec,
		Record &	updatedOptions
	)		`[virtual]`

apply options stored in rec to the DisplayData; return value True means a refresh is needed.

Any fields added to the updatedOptions argument are options which have changed in some way due to the setting of other options - ie. they are context sensitive.

Reimplemented from casa::WCCSAxisLabeller.

void casa::WCCSNLAxisLabeller::setWorldRanges	(	const Vector< Double > &	worldMin,
		const Vector< Double > &	worldMax,
		const Vector< String > &	units
	)

Set the world min and max ranges (and their associated units) to be used by the CoordinateSystem::toMix computations.

If not specified with this function, -180->180, -90->90 for DirectionCoordinates used (rest don't matter). Specifying this correctly can make the toMix computations much faster (it uses an iterative solution) and avoid solution ambiguities.