casa::DisplayMethod Class Reference

Base class for drawing a particular element (view) of a DisplayData. More...

#include <DisplayMethod.h>

Inheritance diagram for casa::DisplayMethod:

Public Member Functions
	DisplayMethod (DisplayData *parentDisplayData)
	Constructor.
virtual	~DisplayMethod ()
	Destructor.
virtual void	draw (Display::RefreshReason reason, WorldCanvasHolder &wcHolder)=0
	Draw on the provided WorldCanvasHolder.
virtual void	cleanup ()
	clear drawlist state.
void	addRestriction (Attribute &newAt, Bool permanent)
	Set & remove restrictions.
void	addRestrictions (AttributeBuffer &newBuf)
void	setRestriction (Attribute &newAt)
void	setRestrictions (AttributeBuffer &newBuf)
void	removeRestriction (const String &name)
Bool	existRestriction (const String &name)
void	clearRestrictions ()
Bool	matches (Attribute &at)
	match restriction
Bool	matches (AttributeBuffer &atBuf)
Protected Member Functions
	DisplayMethod ()
	(Required) default constructor.
	DisplayMethod (const DisplayMethod &other)
	(Required) copy constructor.
void	operator= (const DisplayMethod &other)
	(Required) copy assignment.
DisplayData *	parentDisplayData ()
	Return the parent DisplayData.
Protected Attributes
AttributeBuffer	restrictions
Private Attributes
DisplayData *	itsParentDisplayData
Friends
class	DisplayData
	Allow DisplayData objects to find out about restrictions in DisplayMethod elements.

Detailed Description

Base class for drawing a particular element (view) of a DisplayData.

Synopsis

This base class defines an interface for drawing a single view of a DisplayData object. The fundamental idea is that a DisplayData class will manage one or more DisplayMethod objects, and request the individual objects to draw as necessary.

Definition at line 56 of file DisplayMethod.h.

Constructor & Destructor Documentation

casa::DisplayMethod::DisplayMethod ( DisplayData * parentDisplayData )

Constructor.

DisplayMethods need to know who their parent DisplayData is.

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

Destructor.

casa::DisplayMethod::DisplayMethod ( ) [protected]

(Required) default constructor.

casa::DisplayMethod::DisplayMethod ( const DisplayMethod & other ) [protected]

(Required) copy constructor.

Member Function Documentation

void casa::DisplayMethod::addRestriction	(	Attribute &	newAt,
		Bool	permanent
	)

Set & remove restrictions.

void casa::DisplayMethod::addRestrictions ( AttributeBuffer & newBuf )

virtual void casa::DisplayMethod::cleanup ( ) [virtual]

clear drawlist state.

dk note 11/03: Only used by the PrincipleAxesDM branch, where the implementation has been moved. Implementation should remain null on the CachingDD/DM branch, which uses different interface (purgeCache) and state for this.

Reimplemented in casa::AxesDisplayMethod, casa::DrawingDisplayMethod, casa::Histogram2dDM, casa::PrincipalAxesDM, casa::Profile2dDM, casa::SkyCatOverlayDM, casa::TblAsContourDM, casa::TblAsRasterDM, casa::TblAsXYDM, casa::WedgeDM, and casa::WorldAxesDM.