[maemo-developers] [pymaemo] hildon-desktop: getting D-Bus?

[From: Thomas Waelti]

As a final status update:
a vastly improved version of Recaller has been built and uploaded - it will show up in extras-devel during the next hours :-)

Thanks for all the inputs and have fun
-Tom


> Thanks to all of you! Based on your feedbacks, I was able to find a solution :-)
> So here is on how to get your hands on a dbus system object in a
> python-based hildon-home widget in a way that you can attach
> callbacks.
>
> from dbus.mainloop.glib import DBusGMainLoop
> dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
> dbus.mainloop.glib.threads_init()
>
> class YourHomePlugin(hildondesktop.HomePluginItem):
>
>  def __init__(self):
>    self.bus = dbus.bus.BusConnection("unix:path=/var/run/dbus/system_bus_socket")
>
>
> This means that auto-recording now works in my Recaller widget...
> I'll post a new version to Extras-Devel during the next days.
>
> Thanks again to everybody!
> -Tom
>
>
> 2010/4/14 Kimmo Hämäläinen <kimmo.hamalainen at nokia.com>:
>> On Tue, 2010-04-13 at 23:19 +0200, ext Thomas Waelti wrote:
>>> (Crossposting to maemo-devel, hoping for a Hildon-Desktop or D-Bus expert to pick this up. Original thread is at https://garage.maemo.org/pipermail/pymaemo-developers/2010-April/001444.html )
>>>
>>> Thanks for a very interesting input. Unfortunately, it didn't work for my needs, as I must get my hands on the SYSTEM bus, not the Session one.
>>> I tried your example, changing it to
>>>
>>>     self.bus = dbus.bus.BusConnection("unix:abstract=/var/run/dbus/system_bus_socket")
>>>
>>> However, I get this error:
>>> dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoServer: Failed to connect to socket /var/run/dbus/system_bus_socket: Connection refused
>>>
>>>
>>> Isn't this the correct address of the system dbus?
>>> Or do I have a permission (or other) problem when trying to get on the system-dbus from hildon-desktop?
>>
>> You mean hildon-home (hildon-desktop does not have plugins). I found
>> some code from
>> http://dbus.freedesktop.org/doc/dbus-python/doc/tutorial.html#connecting-to-the-bus
>>
>> =====
>> import dbus
>> from dbus.mainloop.glib import DBusGMainLoop
>>
>> dbus_loop = DBusGMainLoop()
>>
>> bus = dbus.SessionBus(mainloop=dbus_loop)
>> =====
>>
>> Just replace SessionBus with SystemBus, yes?
>>
>> -Kimmo
>>>
>>>
>>> Thanks all
>>> -Tom
>>>
>>>
>>> > As a follow-up to the discussion about d-bus from a hildon widget a
>>> > few days ago that I found out while having the same problem, I've
>>> > finally managed to get something that seems to be working for me:
>>> >
>>> > # Create a session bus.
>>> > import dbus
>>> > from dbus.mainloop.glib import DBusGMainLoop
>>> > dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
>>> > from os import environ
>>> > bus = dbus.bus.BusConnection(environ["DBUS_SESSION_BUS_ADDRESS"])
>>> >
>>> > And then bus can be used as usual. I haven't done a whole lot of
>>> > testing, as I just found this out, but it appears to be working both
>>> > in command line mode and as a home widget.
>>> >  Yves.
>>> > _______________________________________________
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>>> > pymaemo-developers at garage.maemo.org
>>> > https://garage.maemo.org/mailman/listinfo/pymaemo-developers
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