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EventRouter::EventMapper Class Reference

#include <EventRouter.h>

List of all members.


Detailed Description

Does the actual storage of the mapping between EventBase's and the EventListeners/EventTrappers who should receive them.

Actually only stores void*'s, so it's more general than just Listeners or Trappers

Definition at line 188 of file EventRouter.h.

Public Member Functions

 EventMapper ()
 constructor

void addMapping (void *el, EventBase::EventGeneratorID_t egid)
 Adds a listener for all events from a given event generator.

void addMapping (void *el, EventBase::EventGeneratorID_t egid, unsigned int sid, EventBase::EventTypeID_t etid)
 Adds a listener for a specific source id and type from a given event generator.

void removeMapping (void *el, EventBase::EventGeneratorID_t egid)
 Removes a listener for all events from a given event generator.

void removeMapping (void *el, EventBase::EventGeneratorID_t egid, unsigned int sid, EventBase::EventTypeID_t etid)
 Removes a listener for a specific source id and type from a given event generator.

void clean ()
 compresses empty data structures

void clear ()
 Resets the mapping.

template<class T> void getMapping (const EventBase &e, std::vector< T * > &listeners)
 builds a list of all listeners which should receive the event, templated to typecast the pointers for you

bool verifyMapping (void *listener, const EventBase &e)
 Used to make sure that the specified listener exists for the given event.

bool verifyMapping (void *listener, EventBase::EventGeneratorID_t egid, unsigned int sid, EventBase::EventTypeID_t etid)
 Used to make sure that the specified listener exists for the given event.

bool hasMapping (EventBase::EventGeneratorID_t egid)
 so stuff can tell if it even needs to bother generating an event...

bool hasMapping (EventBase::EventGeneratorID_t egid, unsigned int sid)
 so stuff can tell if it even needs to bother generating an event...

bool hasMapping (EventBase::EventGeneratorID_t egid, unsigned int sid, EventBase::EventTypeID_t etid)
 so stuff can tell if it even needs to bother generating an event...


Protected Types

typedef std::map< unsigned
int, std::vector< void * >,
std::less< unsigned int > > 
SIDtoListenerVectorMap_t
 a mapping from source IDs (unsigned ints), each to a vector of pointers to listeners


Protected Attributes

std::vector< void * > allevents [EventBase::numEGIDs]
 an array of vectors of pointers to listeners... in other words, a vector of listener pointers for each generator

SIDtoListenerVectorMap_tfilteredevents [EventBase::numEGIDs][EventBase::numETIDs]
 not for the faint of heart: a matrix of mappings to vectors of pointers to listeners


Private Member Functions

 EventMapper (const EventMapper &)
 this shouldn't be called...

EventMapper operator= (const EventMapper &)
 this shouldn't be called...


Member Typedef Documentation

typedef std::map<unsigned int,std::vector<void*>,std::less<unsigned int> > EventRouter::EventMapper::SIDtoListenerVectorMap_t [protected]
 

a mapping from source IDs (unsigned ints), each to a vector of pointers to listeners

main use in filteredevents

See also:
filteredevents

Definition at line 241 of file EventRouter.h.

Referenced by addMapping(), clean(), clear(), getMapping(), hasMapping(), removeMapping(), and verifyMapping().


Constructor & Destructor Documentation

EventRouter::EventMapper::EventMapper  ) 
 

constructor

Definition at line 164 of file EventRouter.cc.

EventRouter::EventMapper::EventMapper const EventMapper  )  [private]
 

this shouldn't be called...


Member Function Documentation

void EventRouter::EventMapper::addMapping void *  el,
EventBase::EventGeneratorID_t  egid,
unsigned int  sid,
EventBase::EventTypeID_t  etid
 

Adds a listener for a specific source id and type from a given event generator.

Definition at line 170 of file EventRouter.cc.

void EventRouter::EventMapper::addMapping void *  el,
EventBase::EventGeneratorID_t  egid
[inline]
 

Adds a listener for all events from a given event generator.

Definition at line 193 of file EventRouter.h.

Referenced by EventRouter::addListener(), and EventRouter::addTrapper().

void EventRouter::EventMapper::clean  ) 
 

compresses empty data structures

Definition at line 214 of file EventRouter.cc.

Referenced by EventRouter::removeListener(), and EventRouter::removeTrapper().

void EventRouter::EventMapper::clear  ) 
 

Resets the mapping.

Definition at line 249 of file EventRouter.cc.

Referenced by EventRouter::reset().

template<class T>
void EventRouter::EventMapper::getMapping const EventBase e,
std::vector< T * > &  listeners
 

builds a list of all listeners which should receive the event, templated to typecast the pointers for you

Parameters:
e the key event
listeners upon return, the resulting list of listeners e maps to
listeners is not cleared prior to building, new listeners are pushed on end
Results are in the order: all specific matches first, all generator listeners second, in order they were added to the EventMapper.

Definition at line 304 of file EventRouter.cc.

Referenced by EventRouter::doSendEvent().

bool EventRouter::EventMapper::hasMapping EventBase::EventGeneratorID_t  egid,
unsigned int  sid,
EventBase::EventTypeID_t  etid
 

so stuff can tell if it even needs to bother generating an event...

... if a tree falls in a forest, and there's no one around to see it, does it make a sound?
... if Vision sees a ball in an image, and there's no listeners, does it make an event? ;)

Returns:
true if it has any listeners, false otherwise

Definition at line 291 of file EventRouter.cc.

bool EventRouter::EventMapper::hasMapping EventBase::EventGeneratorID_t  egid,
unsigned int  sid
 

so stuff can tell if it even needs to bother generating an event...

... if a tree falls in a forest, and there's no one around to see it, does it make a sound?
... if Vision sees a ball in an image, and there's no listeners, does it make an event? ;)

Returns:
true if it has any listeners, false otherwise

Definition at line 277 of file EventRouter.cc.

bool EventRouter::EventMapper::hasMapping EventBase::EventGeneratorID_t  egid  ) 
 

so stuff can tell if it even needs to bother generating an event...

... if a tree falls in a forest, and there's no one around to see it, does it make a sound?
... if Vision sees a ball in an image, and there's no listeners, does it make an event? ;)

Returns:
true if it has any listeners, false otherwise

Definition at line 262 of file EventRouter.cc.

Referenced by EventRouter::hasListeners().

EventMapper EventRouter::EventMapper::operator= const EventMapper  )  [private]
 

this shouldn't be called...

void EventRouter::EventMapper::removeMapping void *  el,
EventBase::EventGeneratorID_t  egid,
unsigned int  sid,
EventBase::EventTypeID_t  etid
 

Removes a listener for a specific source id and type from a given event generator.

Doesn't necessarily remove the vector or mapping if this was the last listener, use clean() to do that

Definition at line 203 of file EventRouter.cc.

void EventRouter::EventMapper::removeMapping void *  el,
EventBase::EventGeneratorID_t  egid
 

Removes a listener for all events from a given event generator.

Doesn't necessarily remove the vector or mapping if this was the last listener, use clean() to do that

Definition at line 186 of file EventRouter.cc.

Referenced by EventRouter::removeListener(), and EventRouter::removeTrapper().

bool EventRouter::EventMapper::verifyMapping void *  listener,
EventBase::EventGeneratorID_t  egid,
unsigned int  sid,
EventBase::EventTypeID_t  etid
 

Used to make sure that the specified listener exists for the given event.

This is needed because after we call processEvent on a lister, we can't assume that no other listeners have been modified - one listener could cause another to turn off. If that has happened, we shouldn't send the event, even if it was in the queue originally.

Definition at line 322 of file EventRouter.cc.

bool EventRouter::EventMapper::verifyMapping void *  listener,
const EventBase e
[inline]
 

Used to make sure that the specified listener exists for the given event.

This is needed because after we call processEvent on a lister, we can't assume that no other listeners have been modified - one listener could cause another to turn off. If that has happened, we shouldn't send the event, even if it was in the queue originally.

Definition at line 230 of file EventRouter.h.

Referenced by EventRouter::doSendEvent().


Member Data Documentation

std::vector<void*> EventRouter::EventMapper::allevents[EventBase::numEGIDs] [protected]
 

an array of vectors of pointers to listeners... in other words, a vector of listener pointers for each generator

Definition at line 244 of file EventRouter.h.

Referenced by addMapping(), getMapping(), hasMapping(), removeMapping(), and verifyMapping().

SIDtoListenerVectorMap_t* EventRouter::EventMapper::filteredevents[EventBase::numEGIDs][EventBase::numETIDs] [protected]
 

not for the faint of heart: a matrix of mappings to vectors of pointers to listeners

Definition at line 246 of file EventRouter.h.

Referenced by addMapping(), clean(), clear(), EventMapper(), getMapping(), hasMapping(), removeMapping(), and verifyMapping().


The documentation for this class was generated from the following files:
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Generated Wed Jan 21 03:23:10 2004 by Doxygen 1.3.4