Gregor,
Very interesting indeed. If I login, load the module, interact with the
combobox, logout, the instance remains in the profiler. However if I do
all that and THEN load another module and logout, the number of
instances of the first module goes to zero. These modules are being
loaded into a ViewStack, BTW.
Is this the FocusManager bug you described? Is there a workaround?
I'd be thrilled to discover that Binding was not the culprit here.
Jeff
-----Original Message-----
From: flexcoders@yahoogroups.com
[mailto:flexcod...@yahoogroups.com] On Behalf Of Gregor Kiddie
Sent: Thursday, April 23, 2009 9:40 AM
To: flexcoders@yahoogroups.com
Subject: RE: [flexcoders] Unloading Modules - Binding is the
Enemy?
It does sound like you are describing the bug where the focus
manager holds onto the reference of the combo box and stops the module
unloading...
If you lose the combobox focus, does the module unload?
Gk.
Gregor Kiddie
Senior Developer
INPS
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________________________________
From: flexcoders@yahoogroups.com
[mailto:flexcod...@yahoogroups.com] On Behalf Of Battershall, Jeff
Sent: 23 April 2009 14:32
To: flexcoders@yahoogroups.com
Subject: RE: [flexcoders] Unloading Modules - Binding is the
Enemy?
Thanks Pedro,
I've seen what your describing in the docs - I'm looking at this
via the profiler which is giving me feedback as to number of live
instances, etc.
Here's what I'm basing my statements on:.
1) I start up my app, which loads modules at runtime based upon
user choice from a menu.
2) Module exectues Cairngorm Event/Command/Delegate to get array
to populate a combo box. I'm passing a reference to the module's model
in my Cairngorm event and the model is updated upon completion of the
Command.
3) Combobox is bound (via MXML) to the model.
4) If I don't interact with the combobox, I can then logout and
unload the module successfully. The profiler tells me there was
previously 1 instance of the module and now there are zero instances.
5) If I make the combobox active (by interacting with it in any
way), and then logout, the module remains in memory, with the profiler
reporting one instance instead of zero.
6) If I then login again, the Profiler reports 2 active
instances of the module. Note that any model objects are duplicated as
well. For example, if my list of suppliers (used to popuate my combobox)
(a strongly typed AS class) was previously 64, the profiler now reports
there are 128 instances.
There's my behavior. When my UI object (in this case ComboBox),
becomes active, the binding becomes active and then the module will not
unload, even if I set the modules model to null before attempting to
unload. It would appear that I need to invalidate all outstanding
bindings to any data object before the module will fully unload. This
would seem to indicate that MXML binding (via curly braces) isn't going
to allow this.
Jeff
