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https://issues.apache.org/jira/browse/WICKET-5464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13865229#comment-13865229
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Sven Meier commented on WICKET-5464:
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If others agree, I can backport the improvements to 6.x. It introduces a minor
functional change only: #restart() and #stop() no longer updates the hosting
component automatically.
> AbstractAjaxTimerBehavior does not work in combination with Wizards
> -------------------------------------------------------------------
>
> Key: WICKET-5464
> URL: https://issues.apache.org/jira/browse/WICKET-5464
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 6.12.0
> Reporter: Marcus Thiesen
> Attachments: ajaxwizard-quickstart.tar.bz2
>
>
> AbstractAjaxTimerBehavior calls stop() in it's onRemove() method. When used
> in a Wizard onRemove is triggered by onActiveStepChanged. This disabled, but
> never re-enables the behavior if the component tree is reused during wizard
> stepping.
> In my opinion it is more correct to disable the frontend timer but keep the
> internal state of the Bahavior as is (or resetting headRendered to false as
> the Behavior is in the pre render state after the onRemove) in order to
> re-enable the Timer when the step using the Behavior is rendered again.
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