RE: [flexcoders] ViewHelper and Cairngorm

Thu, 27 Oct 2005 09:08:32 -0700

Title: Mensagem
Hi Michel,
 
Apologies for the quick response here; with Cairngorm 0.99, we'd recommend here that you learn to use the ModelLocator pattern.  Have your view bind to a model in the ModelLocator, and in the result handler on your
commands, update the model.  No need for view helper, unless you need to represent the data that comes
back from the server in some particular fashion, before the view renders it.
 
I'm pretty sure the current Cairngorm Store sample shows the ModelLocator in action !
 
Best,
 
Steven
 
--
Steven Webster
RIA Practice Director (EMEA)
Macromedia Consulting
 
Office: + 44 (0) 131 338 6108
Mobile: +44 (0) 7917 428 947
 

From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Michel Bertrand
Sent: 27 October 2005 16:51
To: flexcoders@yahoogroups.com
Subject: RES: [flexcoders] ViewHelper and Cairngorm

Hello !
 
My problem is to update a view after an execution of a Command. For example, I would like to update
DataGrid rows after performing a new database query. So, I was taking I look on Cairngorm source
code and I found the following comments for ViewHelper.as:
 
 * In order to carry out their function, Command classes will require
 * to both interrogate and update the view.  Prior to performing any
 * business logic, the Command class may require to fetch values that
 * have been set on the view; following completion of any business logic,
 * the final task often to be performed of a Command class is to update
 * the View (user interface) with any results returned, or perhaps to
 * switch the View entirely (to a different screen).
 
So, I think this pattern can help me to solve this question. Am I right ? Is it the best approuch
for updating my view ?
 
P.S: What about Cairngorm Framework compatibility in Flex 2.0 platform ? Any news ?
 
Thanks to Stanislav for his sample also !
 
Regards,
Michel.
-----Mensagem original-----
De: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] Em nome de Steven Webster
Enviada em: quinta-feira, 27 de outubro de 2005 13:34
Para: flexcoders@yahoogroups.com
Assunto: RE: [flexcoders] ViewHelper and Cairngorm

Michel,
 
Why do YOU want to use a view helper ?  What is the business problem you are trying to solve ?  What is the technical challenge ?  Design patterns are solutions to problems.  Do you have the right problem for a ViewHelper to solve ?
 
Tell us what you're trying to do ?  Who knows, maybe the ModelLocator would better suit your task.
 
Steven
 
--
Steven Webster
RIA Practice Director (EMEA)
Macromedia Consulting
 
Office: + 44 (0) 131 338 6108
Mobile: +44 (0) 7917 428 947
 

From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Michel Bertrand
Sent: 27 October 2005 14:01
To: flexcoders@yahoogroups.com
Subject: [flexcoders] ViewHelper and Cairngorm

Hello !

How can I use ViewHelper on Cairngorm ?

Could anybody give me a sample ?

Thanks in advance,
Michel Bertrand | Desenvolvimento | DATASUL Tecnologia
Acesse www.datasuldirect.com.br e conheça mais sobre os produtos e soluções de tecnologia




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