Sorry, my bad English. Should be Stefan.
-TH
--- In flexcoders@yahoogroups.com, "Tim Hoff" <[EMAIL PROTECTED]> wrote:
>
> Hi Stephan,
>
> Don't worry about good/bad English here, communication is the
key.
> The beauty of Cairngorm and Flex is that you can accomplish the
same
> thing several ways. Chances are that your edit/delete form is a
> view also. So you can either change view state (ModelLocator) to
> add the view child, or create a PopUp with the view as the child.
> Either way works, but PopUps add a level of event processing that
> can be tricky.
>
> To answer your question, the Cairngorm pundits would recommend
that
> the DataGrid's selected event should trigger a Command that
updates
> a ModelLocator state variable, and selected item, to display the
> form. That's one way. Or you can launch a PopUp from the command
> itself.
>
> Another approach is to not worry about the view knowing about the
> model. I mean it's bound one way, why not the other. Every bound
> view knows about the ModelLocator. So it makes sense, since a
view
> has a hard coded variable name for state, that you can also
directly
> change a ModelLocator variable from the view. Total encapsulation
> or limited encapsulation?
>
> Just make sure that you keep the data in the model. What you
choose
> beyond that is apparently up to you. I personally like the PopUp
> approach. From the view, it's quicker and valid for local
> processing. But, the Command/ModelLocator approach is considered
> more stable .02
>
> -TH
>
> --- In flexcoders@yahoogroups.com, "Stefan Schmalhaus" <stefan@>
> wrote:
> >
> > I've done some research on this list but haven't found any valid
> > information on what's considered best pratice in dealing with
popup
> > windows. The few Cairngorm sample apps that are around don't
seem
> to
> > use the TitleWindow component at all.
> >
> > Let's say I have a simple DataGrid populated with some user
data.
> If I
> > click on a row in the DataGrid a popup window opens with a form
for
> > editing the user information. The popup window also has two
buttons
> > for deleting or saving (updating) the user account.
> >
> > I have done stuff like this several times in Flash/AS2 but I've
> never
> > used a framework approach so far. Now, if I look at this rather
> simple
> > task from a Cairngorm perspective it doesn't seem to be that
simple
> > any more. (But I guess that's because I'm not yet too familiar
with
> > Cairngorm.) I know how to establish databinding between the data
> > provider and {model.users} and all this basic Cairngorm stuff.
> >
> > But what happens when a row is clicked? I'm not even sure if I'm
> > supposed to treat this event as a single event ("selectUser" or
> > "openPopup"?) or as a chain of two events ("selectUser" ->
> > "openPopup"). Since my user information is organized as an array
of
> > value objects it's easy to assign the selected user VO to
> > model.selectedUser:
> >
> > model.selectedUser = UserVO(userList.selectedItem);
> >
> > But am I "allowed" to directly access the ModelLocator from my
view
> > component? Or am I supposed to route this simple action through
the
> > Cairngorm "command chain" (Cairngorm Event -> Front Controller ->
> > Command Class -> ModelLocator)?
> >
> > Next question, what about the popup itself? Can I simply use
> > PopUpManager.createPopUp( this, UserFormView , true)? Or am I
> supposed
> > to treat this as a Cairngorm Event, too?
> >
> > I feel in "safe Cairngorm terrain" again with the "updateUser"
and
> > "deleteUser" actions on the buttons. But what about closing the
> popup
> > window? Is this even worth a Cairngorm event?
> >
> > I guess these questions sound rather stupid to those of you who
are
> > more experienced with frameworks. But at the moment these
questions
> > are obstacles on my way to master Cairngorm (which I will
> hopefully do
> > one day). I apologize for my verbose post and my bad English,
but I
> > hope that someone can shed some light on these issues.
> >
> > Stefan
> >
>
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