Subclass MAReport (in Magritte) to get clickable (selectable) rows

> I'm trying to subclass MAReport (in Magritte) to get clickable (selectable)
> rows.  I modified #renderTableBodyOn: in MAReport as shown below but, while
> the callback code is surely executed (the #editEvent: method is executed),
> nothing appears in the browser.
> renderTableBodyOn: html
>     self visible isEmpty
>         ifTrue: [...]
>         ifFalse: [
>            self visible keysAndValuesDo: [ :index :row |
>               html tableRow
>                  class: (self rowStyleForNumber: index);
>                  onClick: (html scriptaculous evaluator
>                     callback: [ :script | component editEvent: row ];
>                     return: false);
>                  with: [
>                     self visibleColumns do: [ :col |
>                        col
>                           renderCell: row
>                           index: index
>                           on: html ] ] ] ]
>
> where:
>
> editEvent: event
>    | task |
>     task := self call: (event descriptionEdit asComponentOn: event)
> addValidatedForm.
>     task ifNotNil: [
>         self session database save: event.
>         self refreshReport ]
>
> ---John
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>

>> You cannot use #call: from within an ajax callback. Also you don't use
>> the script variable that should be used to insert new contents into
>> page.
>
> Lukas, can you point me to an example or something that I might read?
>  Thanks!
> ---John
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>