[Seaside] Dynamically updating the options of a select tag

[Jan van de Sandt]

Thanks, I will give it a try.

I thought of the optimization because the "onchange" attrubute of the select
tag contains a lot of javascript code. If I don't update the code on each
ajax request it could save time on both the server and client.

Jan.


On Sat, Jun 12, 2010 at 1:44 PM, Julian Fitzell <jfitzell at gmail.com> wrote:

> Well, the callbacks are stored in the RenderContext, which is in the
> ActionPhaseContinuation. There's no provided API for getting the
> current action phase continuation at the moment, but it would be in
> the context stack and you could look it up again from the session
> based on the _k key. Maybe we should be stashing it in a
> RequestContext property so it is accessible - might be a useful thing
> to have around. As a test, you could customize
> WASession>>handleFiltered: to do that.
>
> I have no idea how beneficial the optimization would be, off the top of my
> head.
>
> Julian
>
> On Sat, Jun 12, 2010 at 10:17 AM, Jan van de Sandt <jvdsandt at gmail.com>
> wrote:
> > Hello,
> >
> > I have three select lists. When I select an item in the first list the
> > second list should be updated. And when I select something in the second
> > list the third list should be updated.
> >
> > I implemented this with jQuery and everything works fine. But I had an
> idea
> > to make everything a bit more efficient by only updating the option tags
> and
> > not the select tag itself on each ajax request. But now I run into the
> > problem that the values of the WAValuesCallback are not updated
> > automatically. Is there a way that I can get to the callback when
> processing
> > the ajax request so I can update the values? Or should I just forget
> about
> > this optimization.
> >
> > Jan
> >
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> >
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