Re: Trouble with create_cairo_context

[Jonathon Jongsma <jonathon quotidian org>]

Mark Tilford wrote:
> On Sat, Sep 27, 2008 at 1:55 PM, Mark Tilford <ralphmerridew gmail com> wrote:
> > Anybody ever figure out what caused this problem?  I can't get the
> > clock example to work:
> >
> > ~/src/gtk/clock$ g++ `pkg-config --cflags --libs gtkmm-2.4`
> > `pkg-config --cflags --libs cairomm-1.0` -g clock.cc main.cc
> > ~/src/gtk/clock$ ./a.out
> > ./a.out: symbol lookup error: ./a.out: undefined symbol:
> > _ZN3Gdk8Drawable20create_cairo_contextEv
>
> I found a workaround:
> Instead of
> m_cairo_context = widget.get_window()->create_cairo_context();
> Use
> m_cairo_context = Cairo::RefPtr<Cairo::Context>(new
> Cairo::Context(gdk_cairo_create(widget.get_window()->gobj())));
>
> In case anybody else runs into the same problem.
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You're probably trying to link against a too-old version of gtkmm (?)  I 
believe the gdk_cairo_create() function was added in GTK+ 2.6, but it 
wasn't wrapped until the next release of gtkmm (due to the fact that 
cairomm wasn't yet stable in time for gtkmm-2.6)

* I might not have the version numbers exactly correct, but I know for 
sure that there was a 1-version gap between when cairo support was added 
to GTK+ and when it was added to gtkmm.

--
jonner