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From "Bob Schellink (JIRA)" <>
Subject [jira] Commented: (CLK-524) Improve ControlRegistry to support custom callback events
Date Sun, 19 Apr 2009 09:33:47 GMT


Bob Schellink commented on CLK-524:

- Form needs to add its hidden fields (form_name and submit_token) as late as possible so
not to interfere with the insert index. If Form adds the hidden fields in the onRender event,
two issues arrise. Overriding onRender and not invoking super.onRender will break Form. User
can also skip the onRender phase by returning false from a Listener, meaning Form will render
without its hidden fields. One can argue that the Form could add the hidden fields in its
#render method, however this might break existing custom Forms as they might not invoke super.render().

- ClickClick has a Repeater control which needs to manipulate its child control names by adding
an index before the Repeater is rendered.

- ClickClick has Ajax support which uses an AjaxControlRegistry that needs to fire certain
events before onProcess. With the new ControlRegistry implementation its easy to add a new
custom event.

This change does make ControlRegistry more complex however I'm hoping that it won't effect

I'm open for alternative solutions as well :)

> Improve ControlRegistry to support custom callback events
> ---------------------------------------------------------
>                 Key: CLK-524
>                 URL:
>             Project: Click
>          Issue Type: Improvement
>            Reporter: Bob Schellink
>            Assignee: Bob Schellink
>             Fix For: 2.1.0
> Improve ControlRegistry to handle callbacks for different events. Currently ControlRegistry
only supports firing listeners after the onProcess event.
> I have a number of use cases where listeners should fire after the onRender event.
> Note: this improvement targets component developers, not users.

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