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https://issues.apache.org/jira/browse/WICKET-627?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alastair Maw updated WICKET-627:
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Assignee: (was: Alastair Maw)
Summary: Can't visit components in a ListView before they're rendered.
(was: onBeforeRenderChildren should be made protected)
I still can't work out how to do this. Igor suggested moving the call to
Component#onBeforeRenderChildren() inside Component#onBeforeRender(), but if I
do that, I get an NPE in the ListView#renderItem() method even for basic code.
> 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've discussed this with Johan and we think we need to make
> onBeforeRenderChildren() protected.
> <AlMaw> I have a ValidationTaggedForm extends Form.
> <AlMaw> And in onBeforeRender, I call visitChildren(validationTaggingVisitor)
> <AlMaw> And the validationTaggingVisitor adds a behaviour.
> <AlMaw> If I have a ListView in the Form, onBeforeRender for the Form is
> called before the ListView populateItem calls.
> <AlMaw> Thus the components added in the ListView aren't visited.
> We can't just swap the order of the calls to onBeforeRender() and
> onBeforeRenderChildren() in Component#beforeRender() because that will break
> existing code and the repeaters. Besides, someone will only want to do things
> the other way around at some later date (e.g. attach a behaviour to a parent
> using a child then needs to reference/find).
> Suggested solution is to make onBeforeRenderChildren() protected, which will
> allow as much flexibility as you like.
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