Re: GtkImageView

["Jeffrey Ratcliffe" <jeffrey ratcliffe gmail com>]

On 15/02/2008, muppet <scott asofyet org> wrote:
> It's a struct (data structure), not an enum (enumeration of constant
>  values).

Yes, of course it is. Fingers getting ahead of the brain.

>  You've marked your newSVGdkPixbufDrawOpts() and SvGdkPixbufDrawOpts()
>  functions with the C storage class keyword "static", which means that
>  the function is visible only within that C file.  Since you need to
>  share the functions between two files, remove the static keyword from
>  those functions in one file, and remove the definitions altogether
>  from the other file.

Ah. Thanks.

>  Still another option, more correct but more work, is to register a
>  GBoxed wrapper for the structure.  Then everything will Just Wonk.

OK. I think I have got the GBoxed wrappers working.

>  Torsten recently added to Glib some useful functions for this purpose,
>  including gperl_sv_is_hash_ref():

That would be excellent, apart from it being too new to be in any
current distribution.

>  Blessing the hash would help you do even more validation, but is not
>  strictly necessary.  If your user is allowed to supply a plain old
>  hash of his own making, then requiring a blessed hash will be
>  breakage, but if the user is supposed to use one of your methods to
>  create one of these things, then blessing the hash is A Very Good Idea.

If I wanted to bless the hash, I assume I would have to do it in the

SV *
newSVGdkPixbufDrawOpts

function, and therefore above the MODULE, which is pure C, and

ST(0) = sv_newmortal();
sv_setref_pv(ST(0), "Gtk2::Gdk::Pixbuf::Draw::Opts", (void*)RETVAL);

isn't going to work. How do I do it?

Lastly, I am getting

IImageTool.c: In function 'XS_Gtk2__ImageView__Tool_paint_image':
IImageTool.c:96: warning: initialization makes pointer from integer
without a cast

which is

GdkPixbufDrawOpts *     opts = SvGdkPixbufDrawOpts (ST(1));

as SvGdkPixbufDrawOpts is defined as a GdkPixbufDrawOpts * in
DrawCache.xs, I assume it is saying that ST(1) isn't SV *. But I don't
see how to fix it.

Regards

Jeff