Re: Having trouble with TreeView, GNOME 3.2 (GTK 3.2)

["Jasper St. Pierre" <jstpierre mecheye net>]

Right, that's because of flat GValue arrays.

On Fri, Aug 24, 2012 at 2:28 AM, Amy C <mathematical coffee gmail com> wrote:
> On 24 August 2012 16:12, Jasper St. Pierre <jstpierre mecheye net> wrote:
>> I doubt gjs from GNOME 3.2 works properly with TreeModel and
>> everything. I wrote a lot of code for GNOME 3.4 for gjs for it.
>>
>
> Cheers. I found a way to make it not segfault, but if GNOME 3.2 + gjs
> + TreeModel is sort of buggy I may just steer clear of it and find
> another way to do what I want.
>
> For interest, this is how I got it "working" (it doesn't segfault and
> displays the labels in the TreeView. Haven't tested editting,
> removing, ...):
>
> I found out about GObject.type_from_name and
> GObject.type_from_name('gchararray') returns 64.
>
> So I set the column type to 64, and using .set segfaults but using
> .set_value doesn't:
>
> store.set(iter, [0], ['asdf']); // <-- segfaults
> store.set_value(iter, 0, 'asdf'); // <-- doesn't segfault
>
> cheers.
>
>> On Fri, Aug 24, 2012 at 2:05 AM, Amy C <mathematical coffee gmail com> wrote:
>>> Hi all,
>>>
>>> I'm trying to append a value to my TreeView/ListStore, but keep
>>> getting a segmentation fault.
>>>
>>> The segmentation fault occurs when I try to call ListStore.append(),
>>> and using gdb the problem is:
>>>
>>> 0x445fc373 in g_type_check_is_value_type () from /lib/libgobject-2.0.so.0
>>>
>>> This snippet is sufficient to reproduce the problem (run in
>>> gjs-console on GNOME 3.2):
>>>
>>> const Gtk = imports.gi.Gtk;
>>>
>>> let store = new Gtk.ListStore();
>>> store.set_column_types([16]); // <-- looked up G_TYPE_STRING: cannot
>>> find this anywhere (it is not exported in imports.gi.GObject on GNOME
>>> 3.2)
>>>
>>> // try add the first row 'asdf'
>>> let iter = store.append();
>>> store.set(iter, [0], ['asdf']); // <-- segfault here
>>>
>>> Now I suspect the problem is somehow to do with me specifying 16 as
>>> the column type (I want G_TYPE_STRING), but according to the GObject
>>> docs[0] G_TYPE_STRING is G_TYPE_MAKE_FUNDAMENTAL(16), and when I tried
>>>
>>> const GObject = imports.gi.GObject;
>>> GObject.type_fundamental(16); // <-- gives 16
>>> GObject.type_check_type_is_value_type(16); // <-- gives TRUE
>>>
>>> If I instead try:
>>>
>>> store.set_value(iter, 0, 'asdf');
>>>
>>> I get "Unable to convert from gchararray to guchar".
>>>
>>> Can anyone shed some light on this?
>>>
>>> [0]: http://developer.gnome.org/gobject/stable/gobject-Type-Information.html#G-TYPE-STRING:CAPS
>>> _______________________________________________
>>> gtk-list mailing list
>>> gtk-list gnome org
>>> https://mail.gnome.org/mailman/listinfo/gtk-list
>>
>>
>>
>> --
>>   Jasper



-- 
  Jasper