[Glade-users] liststore with GObjects

[tristan.van.berkom at gmail.com (Tristan Van Berkom)]

I ran your program in gdb.

The bug is in GTK+, specifically gtk_builder_value_from_string_type()
returns false without
setting an error, this causes gtkliststore.c:list_store_text() to
crash a few lines later.

It seems the current implementation of
gtk_builder_value_from_string_type() doesnt
know how to lookup objects by reference (only to build pixbufs), and
that the object
referencing is done in subclasses or implicitly when the type is reffered to by
a property (in gtkbuilder.c properties are handled with special care
and references
are resolved in the parse finish state).

Sigh, I suppose bugs should be filed... maybe it would be better to just
bring this up on gtk-devel-list...


On Thu, Aug 20, 2009 at 12:51 PM, Alexey
Kurochkin<alexey.kurochkin at pathfinderlwd.com> wrote:
> On Thu, 2009-08-20 at 12:04 -0400, Tristan Van Berkom wrote:
> > On Thu, Aug 20, 2009 at 11:54 AM, Alexey
> > Kurochkin<alexey.kurochkin at pathfinderlwd.com> wrote:
> > [...]
> > > > Yes, note that GObjects in the liststore are be passed by
> > > > reference (i.e. the value of an object column is the id/name
> > > > of the referred object in the file... the same object can show
> > > > up in multiple rows and columns...).
> > >
> > > If you mean replacing <col id="0" /> which Glade generates for GObject
> > > column with something like this:
> > >
> > > <col id="0">adjustment1</col>
> > >
> > > then it does not work. It segfaults... :(
> >
> > Does it ? try manually placing the adjustment definition /before/ the
> > liststore definition.
> >
> > As a liststore can refer to many different types I doubt its a good
> > policy to force all
> > reffered objects to be before the liststore, so, if the above formula
> > successfully
> > works around the segfault, I would call it a bug in GTK+ (that the
> > liststore does
> > not wait for the "finished" signal to resolve referred objects by id).
>
> Nope, the same result. If you care to look, attached is a simple test.
>
> By the way, I have gtk+2.14.5 source here and do not see liststore
> implementing anything called "finished", only custom_tag_start and
> custom_tag_end.