IlvCompositeAccessor Class Reference

Assign the current attribute value to multiple other attributes or subattributes. More...

#include <ilviews/protos/useracc.h>

Inheritance diagram for IlvCompositeAccessor:

List of all members.

Public Member Functions
	IlvCompositeAccessor (const char *name, const IlvValueTypeClass *type, IlUInt count, const char **accnames)
	Creates a new composite accessor of name name and type type.
Protected Member Functions
virtual IlBoolean	changeValue (IlvAccessorHolder *object, const IlvValue &val)
	Called by the method IlvAccessible::changeValue for each IlvAccessor attached to the IlvAccessorHolder.
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.
virtual IlvValue &	queryValue (const IlvAccessorHolder *object, IlvValue &val) const
	Called by the method IlvAccessible::queryValue for each IlvAccessor attached to the IlvAccessorHolder.

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Detailed Description

Assign the current attribute value to multiple other attributes or subattributes.

Library: ilvproto

The IlvCompositeAccessor class dispatches its value changes to multiple other attributes and subattributes of the group.

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Constructor & Destructor Documentation

IlvCompositeAccessor::IlvCompositeAccessor	(	const char *	name,
		const IlvValueTypeClass *	type,
		IlUInt	count,
		const char **	accnames
	)

Creates a new composite accessor of name name and type type.

Changing the value of the attribute will change the values of the count accessors whose names are contained in accnames.

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Member Function Documentation

virtual IlUInt IlvCompositeAccessor::compareValues	(	const IlvAccessorHolder *	object,
		const IlvAccessible *	ref,
		IlvValue *	values,
		IlUShort	count,
		IlvValueArray &	diffs
	)			const [protected, virtual]

Compares the values in ref and object and returns the differing values.

Compares the objects object and ref for the values specified by the values array of length count. The differences are stored in the diffs array, and the method returns the number of differences. The default implementation simply calls the IlvAccessible::compareValues method, which will query the values for the two objects and compare them one by one. Subclasses may compare values more cleverly by grouping differences: for example, the IlvGroupAccessor subclass detects when all nodes of a group differ homogeneously and reports only one difference for the whole group.

See also:

IlvAccessible::compareValues, IlvProtoInstance, IlvPrototype.

Reimplemented from IlvUserAccessor.