CEGUI::LinkedEvent Class Reference

LinkedEvent is an Event subclass that provides a mechanism to link or chain Events together, such that when a specified target event is fired, then this event will additionally fire in response. More...

Inheritance diagram for CEGUI::LinkedEvent:

Collaboration diagram for CEGUI::LinkedEvent:

Public Member Functions
	LinkedEvent (const String &event_name, EventSet *target_event_set)
	Constructor. More...
void	addLinkedTarget (Event &link_target)
	Add a link target for this event. A link target is an event that will trigger this event. More...
Public Member Functions inherited from CEGUI::Event
	Event (const String &name)
	Constructs a new Event object with the specified name.
virtual	~Event ()
	Destructor for Event objects. Note that this is non-virtual and so you should not sub-class Event.
const String &	getName (void) const
	Return the name given to this Event object when it was created. More...
Connection	subscribe (const Subscriber &slot)
	Subscribes some function or object to the Event. More...
Connection	subscribe (Group group, const Subscriber &slot)
	Subscribes some function or object to the Event. More...
void	operator() (EventArgs &args)
	Fires the event. All event subscribers get called in the appropriate sequence. More...

Protected Types
typedef std::vector < Event::Connection CEGUI_VECTOR_ALLOC(Event::Connection)>	LinkedConnections
Protected Types inherited from CEGUI::Event
typedef std::multimap< Group, Connection, std::less< Group > CEGUI_MULTIMAP_ALLOC(Group, Connection)>	SlotContainer

Protected Member Functions
bool	handler (const EventArgs &args)
	LinkedEvent (const LinkedEvent &e)
Protected Member Functions inherited from CEGUI::Event
void	unsubscribe (const BoundSlot &slot)
	Disconnects and removes the given BoundSlot from the collection of bound slots attached to this Event, thus 'unsubscribing' it. More...
	Event (const Event &)
Event &	operator= (const Event &)

Protected Attributes
LinkedConnections	d_connections
	collection of connection to the linked Events.
const EventSet *	d_owner
	reference to the event set that we added ourself to
Protected Attributes inherited from CEGUI::Event
SlotContainer	d_slots
	Collection holding ref-counted bound slots.
const String	d_name
	Name of this event.

Additional Inherited Members
Public Types inherited from CEGUI::Event
typedef RefCounted< BoundSlot >	Connection
	Connection object. This is a thin 'smart pointer' wrapper around the actual BoundSlot that represents the connection. You can use this object to inspect the current connection state and also to disconnect from the event.
typedef CEGUI::SubscriberSlot	Subscriber
	Subscriber object type. This is now just a typedef to SubscriberSlot, the use of the name Event::Subscriber is maintained for hostorical and compatability reasons.
typedef unsigned int	Group
	Type for a subscriber group. You can use the subscriber group to order calls to multiple subscribers. Groups are called in ascending order, with subscribers with no group called last.

Detailed Description

LinkedEvent is an Event subclass that provides a mechanism to link or chain Events together, such that when a specified target event is fired, then this event will additionally fire in response.

The expected use of this mechanism is for container or compound widgets to be able to expose events of component widgets without needing to provide repetetive boilerplate event forwarding code, and also for scenarios where code is not typically provided (i.e. data based skinning scenarios).

Constructor & Destructor Documentation

CEGUI::LinkedEvent::LinkedEvent	(	const String &	event_name,
		EventSet *	target_event_set
	)

Constructor.

Parameters

name	String object describing the name that this Event will use.
target_event_set	EventSet that the LinkedEvent should add itself to.

Member Function Documentation

void CEGUI::LinkedEvent::addLinkedTarget

(

Event &

link_target

)

Add a link target for this event. A link target is an event that will trigger this event.

Parameters

link_target

Reference to an Event that, when fired, will additionally cause this Event to fire.

Note

Once an event link is established it can not currently be broken without destroying this Event completely.