On Tue, 2011-01-11 at 01:22 -0300, Marco Diego Aurélio Mesquita wrote:
> Hi devs!
>
> I'm working on some improvements for the preview feature[1] but I got
> stuck. Glade must kill current running previews when a project is
> closed, but, I don't know why, the finalize, dispose, and close_impl
> methods are not been called. What is happening? What should I do?
>
> The attached is part of my ongoing work on this issue. It's full of
> debug printf's but shows that the finalize, dispose, and close_impl
> methods are not been called.
>

I looked at the patch briefly, currently it still includes
unneeded functions like glade_preview_kill_preview().

- glade_preview_kill_preview() should be an implied exercise
   by way of finalizing a GladePreview.
- The hash table bookkeeping the running previews should
   hold the reference to the previews (i.e. the GDestroyNotify
   for the hash table of previews should be g_object_unref).
- glade_preview_add_watch() should go away and the watch should
   be added internally by the preview object, and destroyed
   properly when the preview is unreffed.
- If the preview is notified that the child preview process
   died, it should emit a "die" signal so that the GladeProject
   which owns the preview can use that to remove it from the
   hash table, resulting in it's dispose/finalize.

Please deal with these basic API/functionality issues first,
if the ref counts dont balance after that I'll help you take
a look at it and make sure that it finalizes properly.

Hint:
From GladeProject creating a preview should be:

/* comes with initial ref */
preview = glade_preview_launch (...);

/* hash table takes a ref */
g_hash_table_insert (project->priv->preview_hash, preview...);

/* pass ownership of the preview to the hash table */
g_object_unref (preview);

/* Watch previews that die */
g_signal_connect (preview, "die",
                   G_CALLBACK (remove_preview_from_hash_cb),
                   project);


... furthermore, the GDestroyNotify for the preview hash should
be a function that first disconnects the "die" signal callback
and *then* unrefs the preview.

Cheers,
    -Tristan

> [1] https://bugzilla.gnome.org/show_bug.cgi?id=637835
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