adding support for hibernation to xfce4-sessions's exit dialog

[Benedikt Meurer]

Jani Monoses wrote:
>>Hm, but why do both Windows and OSX work out of the box here then? (yes,
>>not a very qualified statement)
> 
> As you probably guessed, because of actual interaction between hw
> manufacturers and Microsoft, and very close interaction between apple
> systems software and apple hardware developers ;)

As said, the statement was rather unqualified, but I think it highlights
the point...

>>IMHO, the whole power management stuff (including the battery plugin)
>>should be done in a sane and well-integrated way, w/o any unnecessary
>>action on the users side. I'm not sure, but maybe GNOME's power manager
>>is worth a look? Dunno how messed up it is, but maybe we can convince
>>them to clean it up, so we can use it in Xfce as well? That'd probably
>>reduce the additional overhead.
> 
> G-p-m has user interaction for the same reasons.
> Investigating g-p-m is one of the xubuntu edgy goals.

IMHO, we should cooperate here. It'd be definitely nice for all Xfce
users if xfce4-session and the battery plugin (and probably other
relevant parts), would support proper power management, combined with a
settings dialog (yes, I'm convinced).

> Apparently as for
> many other useful gnome apps the only thing tying it to the extra ~30
> gnome lib dependencies is GnomeClient used by the libgnomeui library.
> If they'd use exo they'd be set ;)

exo doesn't provide an XSM session client, but only a X11R5 session
client, but that should do the job here as well. GnomeSession is totally
overloaded. You can write a simple session client class for you
application in 15-30mins, without adding dependency on another 10
libraries, see ThunarSessionClient.

> Which brings me to something I wanted to ask you anyway: it seems to me
> that if single-instance-apps API as used by thunar and xfce4-terminal
> woudl be available in exo, it would be another good reason for gnome to
> use it. They need such a thing and AFAIK evince is the only one that
> does it reasonably well.
> Of course I did not talk to gnome devels about this, but how does this
> look to you? It'd be a good step in helping reducing bloat in gnome and
> helping cross-(GTK)-desktop stuff while project ridley is shaping up.

You don't any kind of special API here. Just use D-BUS to register your
application as service, then on startup, try to invoke the method on an
already running service, and if no service is available, continue to launch.

> Anyway I'll keep you updated wrt gnome-power-manager.

Yep.

> Jani

Benedikt