[maemo-developers] Semi-transparent background for Desktop Widget (Python + Cairo)

[From: Brent Chiodo]

Thank you very much! It is working well, now. There is only one minor
issue: When I do this the widget is nicely transparent, but what I'm
packing into the widget remains opaque. I took a screenshot:

http://img192.imageshack.us/img192/5650/cairo.png

What is going on is: there are two gtk.Image's shown. They are both
packed into gtk.EventBox's which is packed into a gtk.VBox which is
added to the widget itself.

How would I go about making everything but the actual image
transparent? (the two images are transparent png's so I do not believe
that is what is causing the black opaque boxes).

If you need the actually code (which is a bit sloppy at the moment)
I'll be glad to clean it up and send it along.

You've been a great help, thanks so much!

P.S. Merry Christmas!

On 12/24/09, Anderson Lizardo <anderson.lizardo at openbossa.org> wrote:
> On Thu, Dec 24, 2009 at 1:40 PM, Anderson Lizardo
> <anderson.lizardo at openbossa.org> wrote:
>> * Use do_expose_event() and do_realize() methods instead of realize()
>> and screen_changed() ones you used (just rename "def expose(self,
>> widget, event)" to "def do_expose_event(self, event)" and "def
>> screen_changed(self, widget)" to "def do_realize(self)"
>
> I forgot to mention: you should not connect these methods
> (do_expose_event() and do_realize()) to any signal, they are "virtual
> methods" called automatically by PyGTK.
>
> I got the idea partially from
> http://ralph-glass.homepage.t-online.de/clock/clock.py and from
> interpreting the example clock widget C code.
>
> Regards,
> --
> Anderson Lizardo
> OpenBossa Labs - INdT
> Manaus - Brazil
>


-- 
Best Regards,

Brent Chiodo