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https://issues.apache.org/jira/browse/WICKET-2955?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Igor Vaynberg resolved WICKET-2955.
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Resolution: Fixed
> Component#onConfigure() - Create a new callback to help manage states such as
> visibility, enabled, etc
> ------------------------------------------------------------------------------------------------------
>
> Key: WICKET-2955
> URL: https://issues.apache.org/jira/browse/WICKET-2955
> Project: Wicket
> Issue Type: New Feature
> Reporter: Igor Vaynberg
> Assignee: Igor Vaynberg
> Fix For: 1.4.10, 1.5-M1
>
>
> Currently it is difficult to manage visibility and enabled states. overriding
> getters comes with the price of multiple calls per request, while overriding
> onbeforerender causes problems with it no longer being called once a
> component is invisible.
> we should have a callback that is always called before the component is
> rendered, and make sure it is only called once per request.
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