Label alignment inconsistent between gtk/pango versions?

[Olivier Fourdan <fourdan xfce org>]

Hi all,

I'm facing some trouble with gtk label alignment and the ellipsize 
property with Pango.

It seems that the alignment of the label changes when setting the 
ellipsize property and I can't find how to get a consistent behavior 
between gtk+-2.6 with pango 1.10 and gtk+-2.8 and pango 1.12.

To illustrate that, I've made a small test program, available here:

http://www.xfce.org/~olivier/misc/testalign.tar.gz

Then I run the same executable on 3 different gtk+ versions and get 
different results, screenshot here:

http://www.xfce.org/~olivier/misc/testalign.png

The first one is with gtk+-2.4 so ellipisze property has no effect and 
generates a warning at runtime (expected).

But when run with gtk+-2.6 and pango 1.10, the label is aligned on the 
right (this is unexpected).

When run with gtk+-2.8 and pango 1.12, the label is properly centered.

Also, note that if I don't reset the "justify" property, then it's just 
the contrary, the label is centered with gtk+-2.6/pango-1.10 and left 
aligned with gtk+-2.8/pango-1.12.

Could someone sched my light on this, how can I get a consistent 
behavior with label alignment?

Thanks in advance,
Best regards,
Olivier.