Re: [ruby-gnome2-devel-en] Bug in ListStore?

[Quintus <qu...@qu...>]

Am Sun, 24 Feb 2013 14:56:40 +0900 (JST)
schrieb Kouhei Sutou <ko...@co...>:
> > That is, the symbol has been converted to a string. I’m not sure
> > whether this is a bug or expected behaviour, but if the latter, I
> > was unable to find it documented somewhere. Can someone light up
> > this?
> 
> GObject doesn't have symbol type. So Ruby/GLib2 maps Symbol
> to G_TYPE_STRING(*).
> 
> (*)
> http://developer.gnome.org/gobject/stable/gobject-Type-Information.html#G-TYPE-STRING:CAPS
> 
> So you get string by the column that is specified as Symbol.

Thank you kou :-). So this is kind of expected behaviour... However, I
can’t imagine GObject has a type for Ruby objects, which work as
expected:

=============================================
require "gtk2"

class Foo

  def initialize
    @foo = 12
  end

end

model = Gtk::ListStore.new(String, Foo, Integer)
row = model.append
row[0] = "String"
row[1] = Foo.new
row[2] = 10

row2 = model.iter_first
p [row[0], row[1], row[2]]
=============================================

The Foo instance coming out here is exactly the same that I passed in
(it even has the same object_id), so it is possible to store arbitrary
objects into ListStore. Perhaps it is possible to store the Symbol
instance (i.e. the VALUE pointer rather than the ID it maps to) the
same way? I’m not sure how ID is defined, but I imagine it to be some
kind of integral value, so another option could be storing it as an
integer probably and converting that back on retrieval?

> Thanks,
> --
> kou

Vale,
Marvin