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https://issues.apache.org/jira/browse/WICKET-627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12515090
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Matej Knopp commented on WICKET-627:
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I'm not sure how calling onBeforeRenderChildren from onBeforeRender could help
here, nor i'm i aware of all the sideeffect it could possibly bring. Imho the
problem is that even if you do it, you'll only have the children components on
the nearest level initialized (not the entire hierarchy). To be able to visit
the components and add behaviors to all of them, we would imho need to make the
initialization two step. (Which would need an extra traversal).
Also if we do this, then we would basically allow a child component to add a
component to parent component in onBeforeRender. What would call beforeRender
on the new component?
> Can't visit components in a ListView before they're rendered.
> -------------------------------------------------------------
>
> Key: WICKET-627
> URL: https://issues.apache.org/jira/browse/WICKET-627
> Project: Wicket
> Issue Type: Bug
> Affects Versions: 1.3.0-beta1
> Reporter: Alastair Maw
> Fix For: 1.3.0-beta3
>
>
> I'm trying to create a Form subclass which automatically adds a Behaviour to
> all of its FormComponents using a visitor. The only place to do this is in
> the Form's onBeforeRender() method. This works fine, until you put your
> FormComponents into a ListView, at which point it doesn't work, because the
> ListView children are yet to be created.
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