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https://issues.apache.org/jira/browse/WICKET-1213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12550669
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Igor Vaynberg commented on WICKET-1213:
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@Johan
and that is fine per page, but what if you want it per session or per
application? you will basically force the user to use a basepages if they want
to handle this in a consistent manner. feel free to refactor it, i really dont
care that much for it. i just implemented it the way that is more consistent
with the current state of how we handle these things...
> enable subclassing of AjaxRequestTarget
> ---------------------------------------
>
> Key: WICKET-1213
> URL: https://issues.apache.org/jira/browse/WICKET-1213
> Project: Wicket
> Issue Type: Wish
> Components: wicket
> Affects Versions: 1.3.0-rc1
> Reporter: Peter Ertl
> Assignee: Igor Vaynberg
> Fix For: 1.3.0-rc3
>
> Attachments: AjaxRequestTarget_using_callback_interface.patch,
> AjaxRequestTarget_with_subclassing.patch
>
>
> In my wicket programming experience so far I always didn't feel quite
> comfortable with the ajax part.
> I had some issues in particular with these as an example:
> - "Always include a common feedback panel from my template page"
> --> add 'target.addComponent(feedbackPanel)' just _everywhere_ (very
> cumbersome and not elegant at all)
> - add a listener using AjaxRequestTarget#addListener
> --> not possible without subclassing the request cycle (which is *yuk* if
> you ask me) to catch the short moment in between AjaxRequestTarget is
> instantiated and AjaxRequestTarget#onRespond() is called
> - automatically set focus on the first form component with errors
> --> add bulky code into all onSubmit() and onError() to check for errrors
> and call AjaxRequestTarget#setFocus
> - add some common function like AjaxRequestTarget#yellowFade(FormComponent)
> --> have some utility method and call it like this:
> AjaxUtil.yellowFade(target) -- not nice as functionality like this should
> really belong to the request target
> I found that all these issues can be solved very elegantly if you could just
> catch the moment where AjaxRequestTarget is instantiated.
> I attached a very little patch (!) which solves all that issues and makes
> ajax just a lot more powerful inside wicket *imho*
> also, it will not break current code but is just an enhancement you will not
> notice unless you need it.
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