[jira] Updated: (TAP5-801) Add Trigger component to trigger a component event during rendering

["Igor Drobiazko (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAP5-801?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Igor Drobiazko updated TAP5-801:
--------------------------------

    Summary: Add Trigger component to trigger a component event during rendering  (was: TriggerEvent component to trigger a component event during rendering)

> Add Trigger component to trigger a component event during rendering
> -------------------------------------------------------------------
>
>                 Key: TAP5-801
>                 URL: https://issues.apache.org/jira/browse/TAP5-801
>             Project: Tapestry 5
>          Issue Type: New Feature
>          Components: tapestry-component-report
>    Affects Versions: 5.1.0.5
>            Reporter: Howard M. Lewis Ship
>            Assignee: Igor Drobiazko
>            Priority: Minor
>
> It would be nice if it were possible to trigger an arbitrary component event during rendering; this is often useful to add JavaScript to a page (via calls to the RenderSupport environmental).
> Currently this can be accomplished using Delegator and providing a Renderable object (as an anonymous inner class) ... but that's ugly, i.e.
> <t:delegate to="wireEventHandlers"/>
> public Renderable getWireEventHandlers()
> {
>   return new Renderable()
>   {
>     public void render(MarkupWriter writer)
>    {
>      ...
>    }
>   };
> }
> I would rather something like:
> <t:triggerevent event="wireEventHandlers"/>
> void onWireEventHandlers()
> {
>   ...
> }
> The MarkupWriter could be passed as the event context, for handlers that need to write markup as well as perform other functions.

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