[sugar] Feedback on Measure (was Re: Another pass through some basic Activity test results)

[Erik Blankinship]

> On Sun, Sep 28, 2008 at 6:02 AM, Gary C Martin <gary at garycmartin.com>
wrote:
> > On 26 Sep 2008, at 19:31, Arjun Sarwal wrote:
> >
> >> 2008/9/26 Gary C Martin <gary at garycmartin.com>:
> >>>
> >>> Here's a set of basic Activity test results for build 8.2-763, hope
the
> >>> ASCI
> >>> art doesn't get too mangled by the list server (need to view with a
fixed
> >>>      Measure-20 . . - . x x x . x Doesn't sleep when Activity is in
the
> >>>                                   background (eats 75% cpu). Can't
seem
> >>> to
> >>>                                   record anything. Keep error when
> >>
> >> -- When Measure is in background and some other Activity comes in
> >> foreground, then Measure releases sound device - you can record sound
> >> using any other program/application. In this state Measure also
> >> doesn't hog CPU.
> >
> > Just testing with Measure-21 and 8.2-765, yes I see this now. However
> > switching to any of the Neighborhood/Group/Home views does not seem
count as
> > putting Measure into the background, it still consumes the cpu and
claims
> > the sound input device. I'm guessing this is a Sugar behaviour? Is this
a
> > bug or a feature (feels like a Sugar bug that would make the UI sluggish
for
> > no go reason)?
>
> See #7856. Seems like a Sugar related issue to me. I had borrowed the
> code and concept from Record activity, which now apparently uses some
> other method to determine switch of view/context/activity.( I think
> they detect whether one of the main gtk widgets is the topmost or not
> etc. not sure) I should try exploring that. Any help on this would be
> great.

Record listens for "visibility-notify-event":

self.playOggWindow.add_events(gtk.gdk.VISIBILITY_NOTIFY_MASK)
self.playOggWindow.connect("visibility-notify-event", self._visibleNotifyCb)

Because Record has many different windows, we listen on each window and run
through a series of checks on the callback to determine if it is the active
activity anymore.

Be sure to look out for #5500 when trying to get access to a resource like
the camera or microphone.
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