El Wed, Mar 18, 2009 at 04:00:50PM +0100, Christophe-Marie Duquesne ens deleit�
amb les seg�ents paraules:
> ->"On the other hand, I think power status changes are announced
> through dbus, so this should still be doable without timers."
> If you have more informations about this, I would be glad if you
> shared it. I would like to improve my widgets and did not know that.
Sure! Here's an extract from 'dbus-monitor --session --monitor'
Plugging AC
signal sender=:1.19 -> dest=(null destination)
path=/org/freedesktop/PowerManagement;
interface=org.freedesktop.PowerManagement; member=OnBatteryChanged
boolean false
signal sender=:1.19 -> dest=(null destination)
path=/org/freedesktop/PowerManagement;
interface=org.freedesktop.PowerManagement; member=PowerSaveStatusChanged
boolean false
Unplugging AC
signal sender=:1.19 -> dest=(null destination)
path=/org/freedesktop/PowerManagement;
interface=org.freedesktop.PowerManagement; member=OnBatteryChanged
boolean true
signal sender=:1.19 -> dest=(null destination)
path=/org/freedesktop/PowerManagement;
interface=org.freedesktop.PowerManagement; member=PowerSaveStatusChanged
boolean true
The thing is that I've only found the specification in
http://people.freedesktop.org/~hughsient/temp/dbus-interface.html, so I'm not
sure whether this is standarized into freedesktop right now, or either it's a
proposal from GNOME.
Nevertheless, you'll still have to have some power-management-aware deamon
sitting around (I start most of the GNOME daemons with awesome) in order to get
those events posted in DBus.
OTOH, this comes for sure from a lower level notification layer, probably HAL
(present in Linux and FreeBSD), so you could probably post a DBus message (or
any other notification mechanism you like) triggered by a HAL event.
apa!
--
"And it's much the same thing with knowledge, for whenever you learn
something new, the whole world becomes that much richer."
-- The Princess of Pure Reason, as told by Norton Juster in The Phantom
Tollbooth
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