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https://issues.apache.org/jira/browse/WICKET-4204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13147790#comment-13147790
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Andrea Del Bene commented on WICKET-4204:
-----------------------------------------

When an item of the list is selected, the event "onclick" is passed to 
AutoCompleteTextField's onchange by the click handler defined at line 578 of 
wicket-autocomplete.js.
A possible solution is to trigger a new event which is not ignored by 
AutoCompleteTextField. See patch.

                
> AutoCompleteTextField+OnChangeAjaxBehavior doesn't fire updates on item 
> selection
> ---------------------------------------------------------------------------------
>
>                 Key: WICKET-4204
>                 URL: https://issues.apache.org/jira/browse/WICKET-4204
>             Project: Wicket
>          Issue Type: Bug
>          Components: wicket-extensions
>    Affects Versions: 1.5.2
>            Reporter: Xavier López
>         Attachments: WICKET-4204.patch
>
>
> When adding an OnChangeAjaxBehavior to an AutoCompleteTextField, onUpdate() 
> doesn't fire when selecting an item from the autocomplete item list. 
> It is firing when using an AjaxFormComponentUpdatingBehavior. 
> wicket-autocomplete.js seems to be using the onchange event handler, which is 
> cleared by Wicket.ChangeHandler. 
> Maybe obj.onchangeoriginal should be checked in first place in 
> wicket-autocomplete.js
> See this related discussion at SO for context: 
> http://stackoverflow.com/q/8047769/851811

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