IlvLoopbackAccessor Class Reference

Watch attribute behavior. More...

#include <ilviews/protos/connacc.h>

Inheritance diagram for IlvLoopbackAccessor:

Public Member Functions
	IlvLoopbackAccessor (const char *name, const IlvValueTypeClass *type, const char *outacc)
	Creates a watching behavior. More...
Public Member Functions inherited from IlvUserAccessor
	IlvUserAccessor (const char *name, const IlvValueTypeClass *type, IlUInt flags=0)
	Constructor. More...
virtual IlBoolean	isOutputValue (const IlSymbol *) const
	Queries if the accessor is an output accessor. More...
IlBoolean	isPrivate () const
	Checks the private status. More...
IlBoolean	isRuntime () const
	Checks the RunTime status. More...
void	setPrivate (IlBoolean val)
	Sets the Private flag of this accessor. More...
void	setRuntime (IlBoolean runTime)
	Sets the RunTime flag of this accessor. More...
Public Member Functions inherited from IlvAccessor
	IlvAccessor (const char *name, IlvValueTypeClass *type)
	Creates a new accessor of name name and type type.
virtual IlBoolean	changeValue (IlvAccessorHolder *object, const IlvValue &val)
	Called by the method IlvAccessible::changeValue() for each IlvAccessor attached to the IlvAccessorHolder.
virtual IlBoolean	changeValues (IlvAccessorHolder *object, const IlvValue *values, IlUShort count)
	Called by the method IlvAccessible::changeValues() for each IlvAccessor attached to the IlvAccessorHolder.
virtual void	getAccessors (const IlSymbol *const **accessors, const IlvValueTypeClass *const **types, IlUInt &count) const
	Returns the names and types of the values handled by this accessor. More...
const IlSymbol *	getName () const
	Returns the name of the accessor. More...
IlvValueTypeClass *	getType () const
	Returns the type of the accessor. More...
virtual IlBoolean	isOutputAccessor (IlBoolean &inputAndOutput)
	Queries if the accessor is an output accessor. More...
virtual IlShort	matchValues (const IlvAccessorHolder *object, const IlvValue *values, IlUShort count, IlvValue *matchingValues=0) const
	Returns the number of values that are handled by the accessor in the values array of length count. More...
virtual IlvValue &	queryValue (const IlvAccessorHolder *object, IlvValue &val) const
	Called by the method IlvAccessible::queryValue() for each IlvAccessor attached to the IlvAccessorHolder.
virtual void	queryValues (const IlvAccessorHolder *object, IlvValue *values, IlUShort count) const
	Called by the method IlvAccessible::queryValues() for each IlvAccessor attached to the IlvAccessorHolder.
void	setName (const IlSymbol *name)
	Sets the name of the accessor. More...

Protected Member Functions
virtual void	initialize (const IlvAccessorHolder *object)
	Attachment method to an IlvAccessorHolder. More...
Protected Member Functions inherited from IlvUserAccessor
virtual IlUInt	compareValues (const IlvAccessorHolder *object, const IlvAccessible *ref, IlvValue *values, IlUShort count, IlvValueArray &diffs) const
	Compares the values in ref and object and returns the differing values. More...
IlBoolean	getValue (IlvValue &val, const IlvAccessorHolder *object, IlvDisplay *display, IlvValueTypeClass *typeClass=0, IlSymbol *typeVal=0, const IlvValue *arg=0) const
	Evaluates a parameter of a user accessor. More...

Detailed Description

Watch attribute behavior.

Library: ilvproto

This accessor class attaches a subscription to an observed attribute (also called output value). The attribute to which this behavior is attached will automatically be set to the value of the watched attribute when this watched attribute is modified. It is equivalent to an internal value subscription. The observed attribute must be capable of notification, that is, it must have a behavior of type 'Event', 'Callback', or 'Output'.

See Also

IlvOutputAccessor, IlvCallbackAccessor, IlvEventAccessor, IlvExportOutputAccessor.

Constructor & Destructor Documentation

IlvLoopbackAccessor::IlvLoopbackAccessor	(	const char *	name,
		const IlvValueTypeClass *	type,
		const char *	outacc
	)

Creates a watching behavior.

Parameters

name	Name of the attribute to attach the behavior to.
type	Type of the behavior, needed only for initialization.
outacc	Name of the notifying attribute (also called output value) that the accessor will watch. Whenever this notifying attribute is changed, the loopback accessor value is changed to the new value of the notifying attribute. This parameter should correspond to an attribute that has an attached 'notifying behavior' so that notification can occur.

Member Function Documentation

virtual void IlvLoopbackAccessor::initialize ( const IlvAccessorHolder *  object )

protectedvirtual

Attachment method to an IlvAccessorHolder.

This method is called when the accessor object is attached to a group. You can redefine it in subclasses of IlvUserAccessor to perform any kind of initialization.

Parameters

object

The object the accessor is attached to.

Reimplemented from IlvUserAccessor.