Philippe Guillard wrote:
Hi
I was happy/surprised to discover the xhr_carselector in 2.1.7 samples, and just want to get news about it (Sorry i can't access Bugzilla today, and before didn't find much on bug 34077).
I imagine this feature needs lots of work, maybe CForms re-work, so i just wonder what is the situation.
The current situation is just this nice sample, but I had some background thinking about Ajax-ifying CForms for some times now and this is itching me more and more :-)
Basically, the idea is that widget stylings can be "ajax-aware". This means two things:
1 - the styling can send some events back to the form
2 - the various elements of the styling can be asynchronously updated,
The first item can be bound to the fact that a widget has an on-value-changed or on-action event handler, sending form values back to the server using XHR, and waiting for some update actions from the server.
When receiving an XHR-originated post, the form tracks all changes made to widgets as a reaction to this post (i.e. values/selection-lists/labels/errors/repeater-sizes, etc) and sends back this event list to the client (we will need a special generator for this).
The client sends these changes to the individual widget stylings in the page, which updates the display.
If some non-ajax-enabled styling needs to be updated (e.g. a repeater table), then a full page reload is triggered. This allows for the coexistence of "passive" stylings (the current ones) and ajax-aware stylings in a single page.
Just some rough ideas for now...
Sylvain
-- Sylvain Wallez Anyware Technologies http://apache.org/~sylvain http://anyware-tech.com Apache Software Foundation Member Research & Technology Director
