Message-ID: <43B5A495.2090709 at rftp.com>
Date: Fri, 30 Dec 2005 13:20:21 -0800
From: Robert Roessler <robertr at rftp.com>
Organization: Robert's High-performance Software
MIME-Version: 1.0
To: LablGTK List <lablgtk at math.nagoya-u.ac.jp>
Subject: Re: bug in GEdit.combo_box_text?
References: <e919163f0512300616t1077c345r at mail.gmail.com>	 <43B5817F.80906 at rftp.com> <e919163f0512301256k450a1fcdk at mail.gmail.com>
In-Reply-To: <e919163f0512301256k450a1fcdk at mail.gmail.com>
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Maurizio Colucci wrote:
> 2005/12/30, Robert Roessler <robertr at rftp.com>:
>> Maurizio Colucci wrote:
>>> I can't seem to set the default entry in a combo box: the following code
>>>
>>>       let surfOptMenu = GEdit.combo_box_text ~strings:["Cement"; "Clay"; "Grass"]
>>>           ~packing:(mainGrid#attach ~left:1 ~top:0)  ~active:0 () in
>>>
>>>
>>> gives the following output:
>>>
>>> (freetennis:15185): Gtk-CRITICAL **: gtk_tree_row_reference_new:
>>> assertion `GTK_IS_TREE_MODEL (model)' failed
>>>
>>> (freetennis:15185): Gtk-CRITICAL **: gtk_cell_view_set_displayed_row:
>>> assertion `GTK_IS_TREE_MODEL (cell_view->priv->model)'
>>>
>>>
>>> and the combo box appears empty.
>>>
>>> Any ideas for a workaround? I am using lablgtk2 as in Ubuntu Breezy
>>> (version 2.4.0+2005.06.13-1build1).
>> If the "2.4.0+..." above corresponds to the LablGTK release, then it
>> is not current - a newer release has been out for two months.  You
>> could just grab the current source tree at
>>
>> http://wwwfun.kurims.kyoto-u.ac.jp/soft/olabl/lablgtk.html
>>
>> and build it locally... builds are pretty smooth, even for Windows! :)
>>
>> Also, do not overlook the "examples" directory tree - the file
>> combobox.ml shows uses of combo_box_text.  Note that the default item
>> is being set explicitly just after creation, plus the tuple nature of
>> the constructed value.
>>
>> Robert Roessler
>> robertr at rftp.com
>> http://www.rftp.com
>>
> 
> Thank you Robert. I installed version 2.6.0 but, unfortunately, the
> problem remains: the combobox looks empty by default (even though the
> items appear when you click on it), and I get those runtime errors.
> The error is caused by passing ~active:0 to GEdit.combo_box_text.  
> Any ideas? Thanks anyway :-)

This reminds me of "X hurts!"... "So don't do X!". :)

Am I misunderstanding your problem or did you miss the part of my 
reply about "... the default item is being set explicitly just after 
creation" (referring to the example code in combobox.ml)?  The 
examples seem to always use the set_active method - which may or may 
not have anything to do with bugs.

Robert Roessler
robertr@rftp.com
http://www.rftp.com