proto_node::proto_eventout< FieldValue >::listener_t Class Reference

Inheritance diagram for proto_node::proto_eventout< FieldValue >::listener_t:

Detailed Description

Listens for events emitted from nodes in the PROTO implementation in order to propagate them out of the PROTO instance.

For internal use only.


Public Member Functions
	listener_t (proto_eventout &emitter, proto_node &node, const FieldValue &initial_value)
	Construct.
virtual	~listener_t () throw ()
	Destroy.
Public Attributes
FieldValue	value
	The value of the most recently emitted event.
Private Member Functions
virtual void	do_process_event (const FieldValue &value, double timestamp) throw (std::bad_alloc)
	Process event.
Private Attributes
proto_eventout &	emitter
	Reference to the outer proto_eventout class.
proto_node &	node
	Reference to the proto_node instance.

template<typename FieldValue>
proto_node::proto_eventout< FieldValue >::listener_t::listener_t	(	proto_eventout &	emitter,
		proto_node &	node,
		const FieldValue &	initial_value
	)

Construct.

Parameters:

	emitter	proto_eventout.
	node	proto_node.
	initial_value	initial value (used for exposedFields).

template<typename FieldValue>
proto_node::proto_eventout< FieldValue >::listener_t::~listener_t	(		)	throw () `[virtual]`

Destroy.

template<typename FieldValue>
void proto_node::proto_eventout< FieldValue >::listener_t::do_process_event	(	const FieldValue &	value,
		double	timestamp
	)	throw (std::bad_alloc) `[private, virtual]`

Process event.

Parameters:

	value	new value.
	timestamp	the current time.

Exceptions:

std::bad_alloc

if memory allocation fails.

template<typename FieldValue>
proto_node::proto_eventout & proto_node::proto_eventout< FieldValue >::listener_t::emitter `[private]`

Reference to the outer proto_eventout class.

Todo:: It's annoying that we need to carry this around. Should investigate the possibility of promoting all this stuff to proto_eventout and have proto_eventout privately inherit field_value_listener<FieldValue>.

template<typename FieldValue>
proto_node & proto_node::proto_eventout< FieldValue >::listener_t::node `[private]`

Reference to the proto_node instance.

template<typename FieldValue>
FieldValue proto_node::proto_eventout< FieldValue >::listener_t::value

The value of the most recently emitted event.