[Seaside] How to access the parent of a component?

[Bahman Movaqar]

On 2013-06-02 09:45, Robert Sirois wrote:
> I suppose it depends on if you're going to use the call/answer method or
> a WATask or something. I'm not very schooled in the ways of Seaside
> architecture, but I hope that helps in the meantime.
> 
> I always just use Announcements because they're clean, organized, and
> they allow for a bit more of a remote approach I suppose.

Thanks!  I just put "Announcements" on my TODO list.  However, for the
time being, I'll stick with the dirty approach to keep it simple :-)

>> Date: Sun, 2 Jun 2013 07:30:58 +0430
>> From: Bahman at BahmanM.com
>> To: seaside at lists.squeakfoundation.org
>> CC: watchlala at hotmail.com
>> Subject: Re: [Seaside] How to access the parent of a component?
>>
>> On 2013-06-02 07:25, Robert Sirois wrote:
>> > Just because the "smallComponent" is included in the children of your
>> > "bigComponent" doesn't make the "bigComponent" the parent of
>> > "smallComponent" architecturally. That statement sounds confusing, I
>> > know. Including components in children does not cause those children to
>> > have references (instance variables, for example) to the component that
>> > returns them as children (which you're expecting to be parent). What
>> > you'll have to do is create an instance variable on "smallComponent" and
>> > set a reference to "bigComponent".
>>
>> Thanks for the hint! I thought so too but then I wondered is that the
>> best way? I mean putting a reference to the so-called parent inside the
>> child looks a bit suspicious, right?
>>
>> I'll proceed with the approach you suggested but please let me know if
>> there's some cleaner way.
>>
>> > RS
>> >
>> >> Date: Sun, 2 Jun 2013 05:19:48 +0430
>> >> From: Bahman at BahmanM.com
>> >> To: seaside at lists.squeakfoundation.org
>> >> Subject: [Seaside] How to access the parent of a component?
>> >>
>> >> Hi all,
>> >>
>> >> I have a big component consisting of smaller ones.
>> >>
>> >> <code>
>> >>
>> >> WAComponent subclass: #BigComponent
>> >> instanceVariableNames: 'smallComponent placeHolder'
>> >> classVariableNames: ''
>> >> poolDictionaries: ''
>> >> category: ''
>> >>
>> >> WAComponent>>#children
>> >> ^ Array with: self smallComponent with: self placeHolder.
>> >>
>> >> </code>
>> >>
>> >> Now I'm trying to change `placeHolder' from an `anchor' callback in
>> >> `smallComponent'.
>> >>
>> >> <code>
>> >>
>> >> SmallComponent>>#renderContentOn: h
>> >> h anchor
>> >> callback: [
>> >> self parent placeHolder: SomeOtherComponent new ];
>> >> with: 'Some other component' ].
>> >>
>> >> </code>
>> >>
>> >> But I get this exception: `SmallComponent(Object)>>doesNotUnderstand:
>> >> #parent' which, I believe, says that I cannot access the container
>> >> component like this.
>> >>
>> >> What is the best way to do this (access the container component)? Is it
>> >> possible at all?


-- 
Bahman Movaqar  (http://BahmanM.com)
ERP Evaluation, Implementation, Deployment Consultant