[Seaside] revel decoration

Diogenes Moreira diogenes.moreira at gmail.com
Wed Mar 30 16:01:54 UTC 2011

well, I solved my problem extended WAActionCallback and using a Annoucement.

It may not be very elegant, but work.. :).

In this way I modify the decoration without generate functional dependences
in the subComponents, when I have actions


WAActionCallback class>>on: aBlock
    newBlock := [
        WACurrentRequestContext value announce: SBAnnouncementClean.
        aBlock value. ].
    ^ self new block: aBlock

    ^ announcer ifNil:[ announcer := Announcer new].

    ^ self session announcer.

MyComponent>>on: anAnnouncement  send: aMessage to: anObject
    self announcer on: anAnnouncement  send: aMessage to: anObject.

      super initialize.
      self on: SBAnnouncementClean send: #clean: to:self.
      "and do other staff"

     "here remove the decorations and do my staff"

---------- Forwarded message ----------
From: Diogenes Moreira <diogenes.moreira at gmail.com>
Date: Tue, Mar 29, 2011 at 3:04 PM
Subject: Re: [Seaside] revel decoration
To: Seaside - general discussion <seaside at lists.squeakfoundation.org>

well, in fact i'm remove the decoration, after rendering process.. is it
I wanna use a decorator only one time.

On Tue, Mar 29, 2011 at 2:29 PM, Johan Brichau <johan at inceptive.be> wrote:

> On 29 Mar 2011, at 19:17, Diogenes Moreira wrote:
> > I don't know why, but  the decorator is present at next rendering time
> for my component.
> afaik, adding or removing a decorator is similar to changing the state of
> the component: you should not do that while rendering.
> The component state is saved before rendering, which means state changes
> during rendering are lost.
> A solution can be to add/remove the decorator in an action callback (e.g.
> from the calling site of #inform: ?)
> But I'm also interested why you are dynamically adding/removing a decorator
> like that.
> Johan_______________________________________________
> seaside mailing list
> seaside at lists.squeakfoundation.org
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
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