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I'm not sure I understand what you mean by a central model
I can't hard code a single class to send requests to many places if
that's what you're suggesting. The reason for this is I'm developing a
core application that can have any number of modules loaded into it.
The purpose of the EventManager class would be when a module loads, it
registers itself for events then sits back and waits.
If it's not something that exists already, however, it's not a big
deal. I have a lot of code ready for conversion.
Thanks,
Seth
On Apr 01, 2005, at 07:13, r0main wrote:
Hello,
not sure global-multicasting is a better event handling than the
Cairngorm's core-handling.
In the past a good software re-design allowed me to skip a lot of
requirements I was asking Steven to put into Cairngorm, like event
sequencing...
Can't a central model fit your need ?
(updated by one command or action, but with many bindings destination
across the application) ?
Romain
--- In flexcoders@yahoogroups.com, Robert Stuttaford [EMAIL PROTECTED]
wrote:
Seth, I think you're looking for a way to notify multiple
views/other
elements when a command is complete.
Cairngorm maps a single command to a single event. It doesn't
prescribe much
about what to do when the event is done, but provides ViewLocator to
find
the views you might need to update.
I think you're possibly looking to formalize a listener list to
broadcast to
for the onResult element of your command class. You could expose
logic in
the front controller to allow views and other classes to listen for
command
completion by command name, and then create a base command class,
which
contains the listen/broadcast functionality, to derive your commands
from.
I guess you could also include a broadcast for the execute, to
allow for
pre-execution logic.
I've not personally run into a situation where I could use this
(done
nothing big enough, yet :D), but I'm certain this could provide
value.
Give it a go!
Sunny skies,
Robert
-Original Message-
From: Seth Voltz [mailto:[EMAIL PROTECTED]
Sent: 01 April 2005 10:16 AM
To: Flex Coders
Subject: [flexcoders] New event manager
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Hey everyone,
So I'm considering writing an event handler slightly different than
the
one in cairngorm and wanted to make sure I can't already do it or
that
it doesn't already exist somewhere in a similar form.
So currently the way events work in cairngorm (at least the way I
learned them and use them) is I broadcast an event from anywhere,
it
gets picked up by an event commander, passed through a delegator
and on
to a specific location, usually through the use of view helpers.
Now, this has been real handy for most stuff because all events
passed
only had one destination. Unfortunately, now my app is getting a
bit
more complicated and it has multiple things that need to know when
something happens. The first solution to this was a Login Handler
(which I'm going to release at some point... probably when I get
the
free time to package it up and document it properly.) which allows
any
class to register itself (either with calls to the static class or
through a LoginHelper which is simply an MXML wrapper for those
calls) and when the login managers triggerLogin function is
called,
it executes the loginTriggered function in all registered
classes.
The same goes for triggerLogout and logoutTriggered
respectively.
So, to recap. I need a better event handler. I want to register
classes
with a master event manager which calls back to all classes when
any
class triggers the specified event. Is this already in existence?
Is it
already in Cairngorm? If not... I'll write it. :)
Thanks,
Seth
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