On 2005-10-06 13:17:26 +0000 Roman Belenov <[EMAIL PROTECTED]> wrote:
Richard Frith-Macdonald <[EMAIL PROTECTED]> writes:
I have never seen anything in the MacOS-X documentation describing how the
session manager tells the application to shut down other than the
NSWorkspaceWillPowerOffNotification. It is clear that the session manager
sends thay notification to each application to tell it to shut down, but it
is not clear what happens then.
Does NSApp observe the notification and call its own -terminate method when
it receives it, or does it depend on the applicaton programmer to write
code
to observe the notification and call -terminate?
Aforementioned documentation explicitly mentions logout, restart and
shutdown
as possible cases of application termination, so the following text (stating
that NSDocumentController handles graceful termination itself and listing
the
code for manual handling) should be applicable to these situations. So it
seems that applicationShouldTerminate: is called without any help from
programmer, either by framework (by observing
NSWorkspaceWillPowerOffNotification) or by session manager (by iterating
over
the list of running applications after sending
NSWorkspaceWillPowerOffNotification).
My point was that there is nowhere that tells us *which* of the
possibilities is used by MacOS-X.
None of them is used by GNUstep (though app programmers could observe
NSWorkspaceWillPowerOffNotification).
It would be nice to get GNUstep to use the same mechanism as MacOS-X ... but
at the moment we don't know what that is.
I think we can safely infer that the session manager *should* send the
NSWorkspaceWillPowerOffNotification to all apps on session termination, but
we don't know what (if anything) it should do then (other than some sort of
force quit of applications still running after some interval), and we don't
know if the gui library should observe NSWorkspaceWillPowerOffNotification
and call [NSApp terminate]
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