[maemo-developers] Gtkmm's DrawingArea problem

[From: Dinh Khac Thanh]

Hi all,

I wrote a simple program using gtkmm's DrawingArea widget. It turns out fine
(no error) but does not show up in Xephys window. After searching Google I
got this:

http://www.mail-archive.com/maemo-developers@maemo.org/msg05422.html

> > On Sat, 2006-09-02 at 13:14 +0300, Jarkko Palviainen wrote:
> >> Hi,
> >> I'm trying to build simple drawing app for Nokia 770 IT2006 but here's
> >> the
> >> problem:
> >> When compiling and running some example, like this
> >> http://www.gtkmm.org/gtkmm2/docs/tutorial/html/ch14s03.html#id2524813
> >> it goes well but just doesn't draw anything on Xephyr emulator, just
> >> blank
> >> window. Compiling and running in normal Debian Sarge is fine, I can see
> >> those lines drawn. The problem seems to be related to on_expose_event()
> >> which is not called as I tested by debug printing in it. I can't use
> >> cairo
> >> as I have to use glimm 2.8.9.
> >
> > Yes, the version of gtkmm that is in the maemo repository uses some
> > special optimizations. The most obvious change is that there are no
> > default signal handlers, so you must connect a signal handler instead of
> > just overriding the default one.

which I think is my problem (I check on_expose_event and it is not called).
But I couldn't find the solution from that link.
Could anyone tell me how to solve this? Thnx in advance.

Btw, anyone has experiences on using Gnome Canvas in maemo? I am thinking of
switching to Gnome Canvas since using Drawing Area/Gdk's Pixmap is a pain to
me.

Regards
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