Josh, (also coming from a non-Cairngorm guy)
I find it helpful to distinguish between presentation models and data models, and that's a way that status flags etc. need not be regarded as "pollution". Just put them in a separate object. There's no rule that says views can only have a reference to one non-local object. Just like the data model, the presentation model(s) may or may not actually be shared by more than one view. A reference can be passed along with events and used by the controller. Having said that, I don't disagree that there may be a place for a more generic way for the controller to notify the view. I believe PureMVC has some sore of Notifier. - RIchard On Thu, Jun 19, 2008 at 5:37 PM, Josh McDonald <[EMAIL PROTECTED]> wrote: > Disclaimer: I don't use Cairngorm or UM, so I might be wrong! But I do > take a keen interest in all that is Flex :) > > Basically, in Cairngorm, from your View, you dispatch an event telling your > command to do some stuff, and then you wait for the model to change before > the view knows to take some action (like say mark the data as saved > on-screen, or close a dialog, etc). Which eventually leads to your model > being polluted with things like status flags, feedback, and other sneaky > things that are really just a back-door direct coupling between command and > view that shouldn't really be in your model. > > When you build a UMEvent, before you dispatch it you say something like > > myEvent.successCallback = this.thingsWereDoneHandler; > myEvent.failCallback = this.somethingWentWrongHandler; > dispatchEvent(myEvent); > > And the UM extensions will keep track of your event, and anything that is > kicked off by the command, and will call back into your view object to let > it know the success / failure of whatever you may have initiated. > > -Josh > > On Fri, Jun 20, 2008 at 10:27 AM, donvoltz <[EMAIL PROTECTED]> wrote: > >> Thanks for your responses. >> >> I agree with the idea that binding should work, I have set up 2 >> datagrids with the same data provider, the standard data grid works >> fine when the model locator is updated, however, the advanced one >> does not. Is it because I am using a grouping tag with the advanced >> data grid that the refresh() is needed or should this work with >> binding as well? >> >> Also, I have looked at the UM Cairngorm. It looks interesting but a >> little beyond me. Do you have any recommendations for getting more >> information on using this than what is supplied at google code?? I do >> not understand the idea of event hooks. >> >> Thanks again for the useful information >> >> Don >> >> >> ------------------------------------ >> >> -- >> Flexcoders Mailing List >> FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt >> Search Archives: >> http://www.mail-archive.com/flexcoders%40yahoogroups.comYahoo! Groups >> Links >> >> >> >> > > > -- > "Therefore, send not to know For whom the bell tolls. It tolls for thee." > > :: Josh 'G-Funk' McDonald > :: 0437 221 380 :: [EMAIL PROTECTED] > >
