Re: [flexcoders] two direction binding and cairngorm

[Graham Weldon]

Question one: I would approach this a little differently Rather than attempting to create a double-binding mechanism. Take advantage of the ModelLocator, and rework the target of the data update from the datagrid. The ItemEditor or after edit event should update the ModelLocator directly, rather than attempting to update the bound data item in the datagrid, this should automatically push the updated value back into the datagrid, giving the impression that it was updated directly in the datagrid. ModelLocator  - Send out Data to bound locations  - Receive updated data Data Display Item  - Bind to ModelLocator  - Update ModelLocator with new data Regarding Question two: A command could quite easily perform the item selection after the data update had been retrieved and correctly assigned to the ModelLocator Hope this helps you some. Graham Weldon Larry Liang wrote: As far as I know, in flex 2b3, if you use {} for data binding. it's a one way binding: source = {destination}. However, if you need the binding to work in two ways, do you do another one but switch the source and destination? The reason I ask this question is that in cairngorm, you can bind the dataprovider of a datagrid to an arraycollection object inside ModelLocator. if you make the datagrid editable, then when users make changes inside the datagrid, you want the arraycollection object in modellocator to be updated. but the databinding only works in one way. In this case, if you bind the arrayobject inside modellocator to datagrid provider, it makes the modellocator has to be aware of where the view is. I'm not sure what's the best way to solve this. please help me. Another question of cairgorm, if i assign a remoting result (an array) to the arraycollection object inside modellocator, the data will be shown in the corresponding datagrid in my view. By default, there is no row selected inside datagrid. if I want the first row to be selected after the data is assigned to the datagrid, what's the best way to achieve this? Should this be done by command class? something like: ModelLocator.getInstance().arrcollection = result; myView.datagrid.selectedIndex = 1; In this case, the command class needs to know where the view is. I don 't consider it as a good design. But do I have to use a view helper in this case? Thanks, Larry __._,_.___ -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com SPONSORED LINKS Web site design development Computer software development Software design and development Macromedia flex Software development best practice YAHOO! GROUPS LINKS  Visit your group "flexcoders" on the web.    To unsubscribe from this group, send an email to:  [EMAIL PROTECTED]    Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. __,_._,___