Hi all,

Just started using flex in the past couple of weeks and while I think I have
the hang of the basic stuff, I wanted to move onto a more realistic project and
ran into some confusion.

Basically, I have an app that will load up an XML file and has a bunch of
custom components. What I'd like to do is load up the XML file in the main
application and have the results of the parsed XML available to all the custom
components.

So if I have a combo box in one of my custom components, I would like for it
to get it's dataprovider from the reloaded XML file.

So I looked through some books and several other online sites and I think
there are 3 strategies but some are less elegant than others.

1) My first inclination is to trigger an XMLFileLoaded event when the
application loads or reloads the xml file and have that event dispatched and
add handlers to all my custom components to deal with the reloaded xml in it's
own way. I'm having some difficulties here in that the application initialize
event seems to dispatch before my custom component's preinitialization gets
called so my event handlers aren't being registered in time for the first load
of the XML file.

2) My second one is to maintain a view state. This is something that's a bit
new to me so I'm not sure how to use it or if it was meant to maintain an
internal state of the app or just the user interface level stuff.

3) reset the desired data in all the components. and manually propogate the
event down the component hierarchy.

Anyone with more experience on how best to handle such a case, I'd really
appreciate any advice.

Thanks

spark

Hi,

I would have created a VO (AS class) which is a singleton and create a
variable which is Bindable and has the result of the parsed XML file. In my
custom components i would have bound the components to the Bindable variable in
the singleton VO created.

This was marking your variable as Bindable will handle notifying all the bound
components when the data changes. As the VO is singleton, you need not worry
about multiple instances being created or making sure only one instance of the
VO is used in all places.

Hope this helps.

"ironblunt" <webforumsuser@macromedia.com> wrote in message
news:gg5g92$ftj$1@forums.macromedia.com...
> Hi all,
>
> Just started using flex in the past couple of weeks and while I think I
> have
> the hang of the basic stuff, I wanted to move onto a more realistic
> project and
> ran into some confusion.

Look at the answer to Q3 here:
http://www.magnoliamultimedia.com/fl...s_Flex_FAQ.pdf

It more focuses on communication up from the components to the application,
but the links apply to your situation as well.

Also, check out the terms "getter" and "setter" in the Help. Also look up
the word "binding."

HTH;

Amy