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https://issues.apache.org/jira/browse/WICKET-4540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13270397#comment-13270397
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Sebastien Briquet commented on WICKET-4540:
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Hi Emond,
So, if I sum-up (and if I understood well):
- Using ContextParameter gets something like: function (event,ui) { ... }
- Using ExplicitParameter gets something like: function (event,ui) { var params
= {'event': event, 'ui': ui}; ... }. This is the actual implementation.
- Using ResolvedParameter could get something like: var myresolvedvalue = 2 +
2; var params = {'myresolvedvalue': myresolvedvalue} ?
- Using ConvertedParameter could get something like: function (event,ui) { var
params = { 'itemId': ui.item.id } ... }
Did I understood well until here?
Moreover, just because I am thinking of that now: I forgot to mention in my
first mail that getCallbackFunctionBody is using a jQuery statement directly
(jQuery.extend({}, attrs.ep, params)).
According to https://cwiki.apache.org/confluence/display/WICKET/Wicket+Ajax:
"All Java components and behaviors should still use the Wicket.** API. This way
if someday we decide to not use JQuery anymore we will have less work to do.
Also if a user uses Dojo/YUI/ExtJS/... and prefer to not have JQuery in her
application then she will be able to provide wicket-ajax-xyz.js implementation
and replace the default one."
It is just a small mistake, but I prefer to point it so can fix it while
updating getCallbackFunctionBody...
To be continued...
Thanks again,
Sebastien.
> Allow AJAX callback function generation to also generate parameters
> -------------------------------------------------------------------
>
> Key: WICKET-4540
> URL: https://issues.apache.org/jira/browse/WICKET-4540
> Project: Wicket
> Issue Type: Improvement
> Components: wicket
> Affects Versions: 6.0.0-beta1
> Reporter: Emond Papegaaij
> Assignee: Emond Papegaaij
> Fix For: 6.0.0-RC1
>
>
> We need an easy way to pass parameters from JavaScript to Java via a function
> that takes parameters. For example, of JQuery UI event callbacks, the
> function takes two parameters: event and ui. But, these aren't the parameters
> you want to pass to Java. A conversion is needed.
> I was thinking about the following: let getCallbackFunction take a
> CallbackParameter vararg, with 4 implementations for CallbackParameter:
> ContextParameter, ExplicitParameter, ResolvedParameter and
> ConvertedParameter. A context parmater, only provides context to the
> function, it is not added to the Ajax call. Both event and ui are context
> parameter. Explicit parameters are context parameters that are also passed to
> the Ajax call. Resolved parameters are resolved using some javascript code.
> The last adds a context parameter and a conversion script to add it to the
> Ajax call.
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