IlvMultipleAccessor Class Reference

Accessor allowing handling several values at the same time. More...

#include <ilviews/protos/accessor.h>

Inheritance diagram for IlvMultipleAccessor:

List of all members.

Public Member Functions
	IlvMultipleAccessor (const char *name, IlUShort count, const char **names, IlvValueTypeClass ***types)
	Creates a new multiple accessor of name name.
	IlvMultipleAccessor (const char *name, IlUShort count, const char **names, IlvValueTypeClass **types)
	See below.
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 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.
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.
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

Accessor allowing handling several values at the same time.

Library: ilvproto

IlvMultipleAccessor is a subclass of IlvAccessor that is designed to handle several values at the same time. For example, the manager and layer values of an IlvGraphicNode should be handled together, so that the changeValues method can have both values to call manager->addObject(obj,layer). This class of accessors is usually not used directly by applications. It is used internally by subclasses of the IlvGroupNode class.

See also:

IlvGroupNode, IlvMultipleGroupAccessor.

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Constructor & Destructor Documentation

IlvMultipleAccessor::IlvMultipleAccessor	(	const char *	name,
		IlUShort	count,
		const char **	names,
		IlvValueTypeClass ***	types
	)

Creates a new multiple accessor of name name.

The accessor handles count values of names names and types types.

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Member Function Documentation

virtual void IlvMultipleAccessor::getAccessors	(	const IlSymbol *const **	accessors,
		const IlvValueTypeClass *const **	types,
		IlUInt &	count
	)			const [protected, virtual]

Returns the names and types of the values handled by this accessor.

Returns:

The names and types of the values handled by this accessor. The base class implementation adds only the name and type of this accessor to the accessors and types lists, but subclasses (for example IlvMultipleAccessor) may add several names and types to signal that the accessor can respond to requests for several values.

Reimplemented from IlvAccessor.

virtual IlShort IlvMultipleAccessor::matchValues	(	const IlvAccessorHolder *	object,
		const IlvValue *	values,
		IlUShort	count,
		IlvValue *	matchingValues = 0
	)			const [protected, virtual]

Returns the number of values that are handled by the accessor in the values array of length count.

The matching values are copied to the matchingValues array, which must have a length of at least count. This method is called by the changeValue[s]/queryValue[s] methods of the IlvAccessorHolder class to determine which IlvAccessors respond to a request for a set of value names. All the accessors that return a non-null count of matching values will be called by the IlvAccessorHolder, with the matching values as arguments. The base class implementation looks for a value corresponding to the accessor name given in values and copies it to matchingValues. Subclasses of IlvAccessor (for example IlvMultipleAccessor) may match several values.

Reimplemented from IlvAccessor.