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Manual syncing question
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Manual syncing question


  • Subject: Manual syncing question
  • From: Miguel Arroz <email@hidden>
  • Date: Fri, 15 Sep 2006 01:19:01 +0100

Hi!

I'm trying to follow the advice I received on WWDC from experienced people to avoid using components that auto-synch their values (ie, the normal way WO works). I was open to this suggestion because I was having some problems that were clearly related to auto- syncing.

So, I'm trying to make some subcomponents that do not use auto- sync. It works great for some stuff (like binding actions, yahoo!) but there are some other stuff that I guess I'm not doing right.

Imagine I have on the top component an object, say, an User. I want to bind the User object to a subcomponent inside the top component. The subcomponent does not auto-sync.

So, I override the synchronizesVariablesWithBindings method on the subcomponent, and I create a method, called user:

  public User user() {
        return (User)valueForBinding(USER_BINDING_NAME);
  }

Well, but this is stupid. I'm actually doing a lot more work (with valueForBinding) than what was done on auto-synch. Every time I access the user, WO goes and grabs the binding. This is a waste of cycles and does not solve one of the problems that lead me to try to write non-auto-synching componentes - to control exactly when is the stuff synced.

I thought about using the subcomponent constructor, but I tested, and when I regenerate the page with another user (imagine I click on a "Next" link that shows me another user, but the parent component it's the same - the method binded to the link returns null) WO apparently re-uses the subcomponent too, so no constructor is called.

  So... basically... how do you solve this?

<Waiting for a one line reply with a really obvious answer that I totally missed>

  Yours

Miguel Arroz

"The world lies in the hands of evil
 And we pray it would last" -- Apocalyptica, Life Burns!

Miguel Arroz
http://www.ipragma.com




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