Re-2: [Newbies] Catching message send

[Mathieu]

Lukas Renggli a écrit :
>> > The original code comes from OmniBrowser. I generalized and extended
>> > it a little bit, since I use it in several projects. The original idea
>> > of announcements comes from Vassili Bykov as described in
>> > <http://www.cincomsmalltalk.com/userblogs/vbykov/blogView?
>> > showComments=true&entry=3310034894>.
>>
>> Ok thanks but What is the aim of Annoucements?
> 
> Have a look at Vassili's blog entry, he explains it much more in
> detail than I can do here.
> 
> Announcements are a clean and object-oriented replacement for the
> #change:, #update: and #triggerEvent: hacks in Squeak and other
> Smalltalk's.
> 
> Announcements can be used pretty much the same way as exceptions,
> except that they are not limited to the execution stack. Interested
> parties can declare their interest for certain events to an announcer:
> 
>   announcer
>      on: SomethingChanged
>      do: [ :ann | ... ]
> 
> Whenever the owner of the announcer triggers an event, all the
> registered blocks are evaluated:
> 
>   announcer announce: (SomethingChanged new
>      foo: 12;
>      yourself)
> 
> Since announcements are objects they can be passed around, they can
> carry data, and they can even modified during the announcement
> processing (veto-able announcements).
> 
> That's basically it.
> 
> Lukas
> 

oops ok I haven't seen the link you given me sorry :-/