[Seaside] Error: Components not found

Yoel Jacobsen yoel at emet.co.il
Thu Oct 21 21:32:15 CEST 2004


 Thank you! it works now.


----- Original Message -----
From: Avi Bryant <avi at beta4.com>
Date: Thursday, October 21, 2004 8:48 pm
Subject: Re: [Seaside] Error: Components not found

> On Oct 21, 2004, at 7:22 PM, Yoel Jacobsen wrote:
> > What's the role of #children whan using a callback?
> A component's callbacks are evaluated in the dynamic context of its 
> ancestors in the UI tree.  This lets its ancestors "control" those 
> callbacks - they can prevent them from executing if the user has 
> not 
> been authenticated, for example, or they can catch validation 
> errors 
> that occur within them and record these for displaying to the user 
> later, or they can set up thread-local variables that will be 
> useful to 
> them, and so on.  To achieve this, the component tree is walked 
> recursively during callback processing, and the callbacks for each 
> component are executed as it is visited.  The #children method 
> controls 
> this traversal - it's what's used to know which subcomponents to 
> recurse into.  If a component isn't listed in #children, it won't 
> get 
> visited, and so its callbacks will never get executed.
> Avi
> _______________________________________________
> Seaside mailing list
> Seaside at lists.squeakfoundation.org
> http://lists.squeakfoundation.org/listinfo/seaside
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