Viewport and style (gtk3)

[Juergen Harms <Juergen Harms unige ch>]

I had hoped that my problem with viewports in gtk2 might have gone away 
in gkt3. It apparently has not, and I have hit additional problems
- I do not manage to call provider->load_from_file ( <path> )
- I cannot even attach a child to the viewport

The attachment contains the corresponding error messages as comments + 
the workaround for the load_from_file problem. Again: my error?, a gtk3 
problem?

Juergen

Attachment: gtk3_viewport.pl
Description: Perl program