[Seaside] [Q] Conditional Updating Using Scriptaculous

[Lukas Renggli]

> To update element with id 'id', I can use html updater id:'id'; ... in scriptaculous.
> But there're times that updating is not needed conditionally. For example,
> div element "itemList" does have 1000+ sub element in itself and a link
> for updating 'itemList' is clicked, but there's no new element added so updating
> should not be done. (Doing update does not harm, but it takes 10+ seconds).
>
> How can I do this, "updater with condition"?

As you say, you use a condition.

html updater
     id: 'somewhere';
     callback: [ :r | ... ];
     condition: ((html element
         id: 'id';
         childElements) size
             addDecoration: (SUBinary new operator: '<='; statement: 1000))

For the last line you maybe want to add some conveniance method to
SUObject, this looks a bit ulgy right now.

Generally for complicated JavaScript behavior it makes sense to write
the script in an editor and include it as an external file.

Lukas

-- 
Lukas Renggli
http://www.lukas-renggli.ch