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Merge pull request #83 from Amrykid/f449d2b7611b4d945eabe03ffb52b5235c544d80

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events.nim updates
This commit is contained in:
Araq 2011-12-29 07:32:51 -08:00
commit 0cda7d59fe
1 changed files with 24 additions and 17 deletions
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7
lib/pure/events.nim
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@ -12,6 +12,7 @@
## This module implements an event system that is not dependant on external ## This module implements an event system that is not dependant on external
## graphical toolkits. It was originally called ``NimEE`` because ## graphical toolkits. It was originally called ``NimEE`` because
## it was inspired by Python's PyEE module. There are two ways you can use events: one is a python-inspired way; the other is more of a C-style way. ## it was inspired by Python's PyEE module. There are two ways you can use events: one is a python-inspired way; the other is more of a C-style way.
##
## .. code-block:: Nimrod ## .. code-block:: Nimrod
## var ee = initEventEmitter() ## var ee = initEventEmitter()
## var genericargs: TEventArgs ## var genericargs: TEventArgs
@ -31,6 +32,7 @@
## myobj.SomeEvent = initEventHandler("SomeEvent") ## myobj.SomeEvent = initEventHandler("SomeEvent")
## myobj.SomeEvent.addHandler(handleevent) ## myobj.SomeEvent.addHandler(handleevent)
## ee.emit(myobj.SomeEvent, genericargs) ## ee.emit(myobj.SomeEvent, genericargs)
type type
TEventArgs* = object of TObject ## Base object for event arguments that are passed to callback functions. TEventArgs* = object of TObject ## Base object for event arguments that are passed to callback functions.
TEventHandler* = tuple[name: string, handlers: seq[proc(e:TEventArgs)]] ## An eventhandler for an event. TEventHandler* = tuple[name: string, handlers: seq[proc(e:TEventArgs)]] ## An eventhandler for an event.
@ -57,6 +59,11 @@ proc removeHandler*(handler: var TEventHandler, func: proc(e: TEventArgs)) =
handler.handlers.del(i) handler.handlers.del(i)
break break
proc containsHandler*(handler: var TEventHandler, func: proc(e: TEventArgs)): bool =
## Checks if a callback is registered to this event handler.
return handler.handlers.contains(func)
proc clearHandlers*(handler: var TEventHandler) = proc clearHandlers*(handler: var TEventHandler) =
## Clears all of the callbacks from the event handler. ## Clears all of the callbacks from the event handler.
setLen(handler.handlers, 0) setLen(handler.handlers, 0)