[sugar] Activation / Deactivation

[Marco Pesenti Gritti]

Bert Freudenberg wrote:
> Hi folks,
>
> is there a notification of activation / deactivation for an activity? 
> Or do I have to watch X11 events when matchbox shuffles windows back 
> and forth?
>

Activity is a GtkWindow so you can listen of focus-in/focus-out. See the 
attached patch for an example. This way you will get 
activated/deactivated also when switching to the home page or the zoom 
view temporarily though. And I'm not sure if that's what we actually 
want. I need to talk with Eben about it.

> I noticed etoys is happily animating and playing sounds even if it is 
> not the top activity, which is most likely not desired.
>
> Is there a general policy of background activity? I guess the chat, 
> for example, would continue to receive messages even when not at top. 
> An animation should be stopped if nobody sees it. But what about a 
> longer-running simulation? Or some time-lapse data measuring from the 
> analogue input?

We should probably have a policy for this in our (planned) activity 
guidelines. Can you open a ticket about this and assign it to me please?

Thanks,
Marco
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