RE: [flexcoders] Re: Cairngorm and popup window design question
| when a user logs in. If your UserVO represents the currently logged-in
user, then I would
| store it in the ModelLocator since it is extremely convenient. Otherwise
(if you're
| editing someone else's UserVO), I would pass it to the controller.
Todd makes good sense here ... if I could elaborate on when to use the
ModelLocator, I would think of a VO as either being "state" or "transient".
Transient data is that data that "comes and goes" during the lifetime
of your application; for instance you want to construct an EmailVO
solely for the purposes of calling the "SendPasswordReminder" command
(by way of convoluted example) then I'd create that EmailVO wherever
I'm broadcasting the "sendPasswordReminder" event - it's a transient
Value Object that only need exist for the lifetime of that use-case
being executed.
If however, the value object I'm creating can be considered application
state - something that dictates the current behavior/appearance of the
application, then I'd add it to the ModelLocator. So - to use Todd's
example, if you want to store the "currently logged in user", you may
choose to attach an instance ("loggedInUser") of UserVO to the model
locator.
Bad Cairngorm Code Smell: The Fat View Helper. We consistently see
people using the View Helper as the "catch all for business logic"
when it doesn't feel like business logic that belongs in a Command
or Business Delegate. Don't forget that Cairngorm is the skeleton
of your application, but that the creation of flesh and muscle and
fur and feathers depends on the nature of the beast that you're
building. So adhere to good OO, create rich hierarchies of classes
that help you describe your business domain, and use these classes
from your Command classes and Business Delegates. Make sure you
have LoanCalculator.as, ShoppingBasket.as, and all other manner of
classes that describe the business domain that you are operating in.
View Helpers manipulate the model to present it for the view.
Best,
Steven
--
Steven Webster
Technical Director
iteration::two
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RE: [flexcoders] Re: Cairngorm and popup window design question
Why not store the object that you wish available to
multiple aspects of your application,
on the ModelLocator ?
Steven
--
Steven WebsterTechnical
Director
iteration::two[EMAIL PROTECTED]
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From: flexcoders@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Shlomi
CohenSent: 14 June 2005 20:52To:
'flexcoders@yahoogroups.com'Subject: RE: [flexcoders] Re: Cairngorm
and popup window design question
Hi
yes
you are right , and i shorten the calls for simplicity. the question is how
the the userVO object is shared among all those
View--Helper--Control--Delegate
i
understand that the helper pass it on but where is it best to define it , on the
helper ? or the view ??
thanks
Shlomi
From: flexcoders@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of
charged2885Sent: Tuesday, June 14, 2005 10:34 PMTo:
flexcoders@yahoogroups.comSubject: [flexcoders] Re: Cairngorm and
popup window design question
disclaimer: i'm new to actionscript and caingorm so i could be
mistaken.From what I understand, you should not be accessing any
services from the viewhelper. Broadcast a FrontController.SAVE_USER event
with the UserVO as data inside the viewhelper instead. this should invoke
the SaveUserCommand which calls your AccountDelegate's saveUser method which
calls the service's saveUser.Todd BolandCharged Software---
In flexcoders@yahoogroups.com, Shlomi Cohen <[EMAIL PROTECTED]> wrote:>
Hi> > This is a design question using the cairngorm
framework .> > How is it best to implement the design
pattern (MVC) proposed by the> framework , regarding object passed from a
window to a popup window , > considering that this object needs to be
accessed both in the View and> ViewHelper> > for
example: you have the CreateUser.mxml and the
CreateUserViewHelper.as> > --here is CreateUser.mxml
> > .>
>
public var userVO:UserVO; // this is set by the calling
window>
>
>
>
>
>
width="200"/>>
>
>
direction="horizontal">>
> text="{userVO.loginName}"
width="200"/>>
>
> > --- here is
CreateUserViewHelper.as> > class
CreateUserViewHelper.as{>
> function
saveUser(){>
service.saveUser(view.userVO); // is this the best way or for this>
class to hold it ???>
> }> > >
}> > Thanks > > Shlomi>
> > > >
__>
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RE: [flexcoders] Re: Cairngorm and popup window design question
Hi
yes
you are right , and i shorten the calls for simplicity. the question is how
the the userVO object is shared among all those
View--Helper--Control--Delegate
i
understand that the helper pass it on but where is it best to define it , on the
helper ? or the view ??
thanks
Shlomi
From: flexcoders@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of
charged2885Sent: Tuesday, June 14, 2005 10:34 PMTo:
flexcoders@yahoogroups.comSubject: [flexcoders] Re: Cairngorm and
popup window design question
disclaimer: i'm new to actionscript and caingorm so i could be
mistaken.From what I understand, you should not be accessing any
services from the viewhelper. Broadcast a FrontController.SAVE_USER event
with the UserVO as data inside the viewhelper instead. this should invoke
the SaveUserCommand which calls your AccountDelegate's saveUser method which
calls the service's saveUser.Todd BolandCharged Software---
In flexcoders@yahoogroups.com, Shlomi Cohen <[EMAIL PROTECTED]> wrote:>
Hi> > This is a design question using the cairngorm
framework .> > How is it best to implement the design
pattern (MVC) proposed by the> framework , regarding object passed from a
window to a popup window , > considering that this object needs to be
accessed both in the View and> ViewHelper> > for
example: you have the CreateUser.mxml and the
CreateUserViewHelper.as> > --here is CreateUser.mxml
> > .>
>
public var userVO:UserVO; // this is set by the calling
window>
>
>
>
>
>
width="200"/>>
>
>
direction="horizontal">>
> text="{userVO.loginName}"
width="200"/>>
>
> > --- here is
CreateUserViewHelper.as> > class
CreateUserViewHelper.as{>
> function
saveUser(){>
service.saveUser(view.userVO); // is this the best way or for this>
class to hold it ???>
> }> > >
}> > Thanks > > Shlomi>
> > > >
__>
This email has been scanned by the MessageLabs Email Security System.>
For more information please visit http://www.messagelabs.com/email
>
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email has been scanned by the MessageLabs Email Security System.For more
information please visit http://www.messagelabs.com/email
__
__
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