Assistance class for auto-caching of DisplayData objects. More...

#include <CachingDisplayMethod.h>

Inheritance diagram for casa::CachingDisplayMethod:

Public Member Functions
	CachingDisplayMethod (WorldCanvas worldCanvas, AttributeBuffer wchAttributes, AttributeBuffer ddAttributes, CachingDisplayData parentDisplayData)
	Constructor.
virtual	~CachingDisplayMethod ()
	Destructor.
virtual WorldCanvas *	worldCanvas ()
	Return the WorldCanvas recorded in this CachingDisplayMethod.
virtual void	draw (Display::RefreshReason reason, WorldCanvasHolder &wcHolder)
	Draw this slice of data on the supplied WorldCanvasHolder.
Protected Member Functions
	CachingDisplayMethod ()
	(Required) default constructor.
	CachingDisplayMethod (const CachingDisplayMethod &other)
	(Required) copy constructor.
void	operator= (const CachingDisplayMethod &other)
	(Required) copy assignment.
virtual Bool	drawIntoList (Display::RefreshReason reason, WorldCanvasHolder &wcHolder)=0
	Draw into a cached drawing list, called by draw function.
Private Attributes
WorldCanvas *	itsWorldCanvas
	Store for the WorldCanvas which this has previously drawn upon.
AttributeBuffer *	itsWCHAttributes
	Store for WorldCanvasHolder- and DisplayData-specific AttributeBuffers.
AttributeBuffer *	itsDDAttributes
Bool	itsHasList
	Do we have a cached drawing list?
uInt	itsCachedDrawingList
	Store for cached drawing list number.

Detailed Description

Assistance class for auto-caching of DisplayData objects.

Intended use:

Public interface

Prerequisite

Etymology

"CachingDisplayMethod" is an implementation of a DisplayMethod which provides a single element in a cache of individual depictions of some data.

Synopsis

Definition at line 66 of file CachingDisplayMethod.h.

Constructor & Destructor Documentation

casa::CachingDisplayMethod::CachingDisplayMethod	(	WorldCanvas *	worldCanvas,
		AttributeBuffer *	wchAttributes,
		AttributeBuffer *	ddAttributes,
		CachingDisplayData *	parentDisplayData
	)

Constructor.

A single instance of a CachingDisplayMethod is setup to draw on a particular WorldCanvas, and only when particular conditions, as stored in the provided AttributeBuffers, are met. The parent DisplayData is given in parentDisplayData.

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

Destructor.

casa::CachingDisplayMethod::CachingDisplayMethod ( ) [protected]

(Required) default constructor.

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

(Required) copy constructor.