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https://issues.apache.org/jira/browse/WICKET-1969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656984#action_12656984
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Timo Rantalaiho commented on WICKET-1969:
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By overriding newItem you can do this quite easily already.
There's already OddEvenItem (or OddEvenRowItem or something
like that).
> Add IRepeatableBehavior for DataViews, ListViews etc.
> ------------------------------------------------------
>
> Key: WICKET-1969
> URL: https://issues.apache.org/jira/browse/WICKET-1969
> Project: Wicket
> Issue Type: Wish
> Components: wicket
> Reporter: Peter Parson
> Priority: Minor
>
> Having an IRepeatableBehavior for repeatable views (allowing hooking into
> populateItem) would be quite useful. There are quite common tasks one could
> stuff into those behaviors, e.g.
> * apply CSS class names to list item element dependent on index (e.g. first,
> last, odd, even)
> * output separators for all but the last item
> * show/hide elements depending on index, e.g. to clear CSS float after 5
> items or display table header row every 20th line
> Things like that are implemented frequently. Sublassing every repeatable once
> for this purpose would be an option, however I think this would be better as
> behavior, even more since there are several types of repeatable components.
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