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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 [email protected], "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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