[python] How can a noob get a simple implementation?
Jakub Piotr Cłapa
jpc at pld-linux.org
Tue Aug 30 21:56:32 PDT 2005
Federico Pelloni wrote:
> Hi everybody :-)
> First of all, a bit of scenery:
> - python window manager (today, a wrapper over Pywm)
> - python taskbar (building it on my own)
> They should communicate between them, and since I want this simple
> DE to be modern (the taskbar uses cairo for rendering) I thought
> the best way is DBus.
> My idea:
> 1 - a window is created
> 2 - the WM should emit a signal (let's say "window.created") over dbus
> with no particular destination (it could be useful also for a pager, one
> 3 - the taskbar receives the signal "window.created" sent by "org.fredp.wm"
> 4 - it draws the new task using the infos shipping with the signal
Isn't this better handled using some X IPC mechanisms? (you will loose
network transparency if you do it over DBus, won't you?)
> My questions:
> A - is it possible to have this done with a few (I mean 2 or 3, not many
> function calls? Maybe a
> dbus.emit_signal("window.created", (windowobject))
> in the WM code and a
> dbus.add_signal_receiver("window.created", self.draw_task)
> in the taskbar code. Quick and simple, I don't need much more.
DISCLAIMER: It's not obvious if my work is a GoodThing(TM) (I'm not
totally sure either) so please consider choosing it over the bindings
If you want quick and simple you could give my experimental pure-python
implementation a try (you can find it in the archives). The Python
bindings are quite sophisticated and unfortunately depend on glib (thus
on pygtk) requiring a glib mainloop in your program.
If you have any questions, don't be afraid to ask (I don't have much
documentation for my work right now --- just what's written in the
source + the example dbus_monitor.py).
> B - is there an up-to-date clear tutorial showing how to do something
> Often I find code that doesn't work (even that from the official how-to,
> I can't import dbus.service)
There where some API changes (but I'm afraid I do not remember what it
was changed into).
Jakub Piotr Cłapa
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