From: Olivier Andrieu <andrieu at ijm.jussieu.fr>
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Message-ID: <16381.19081.326477.851368 at akasha.ijm.jussieu.fr>
Date: Thu, 8 Jan 2004 13:18:17 +0100
To: Artem Prisyznuk <tema at sit.kiev.ua>
Cc: lablgtk at kaba.or.jp
Subject: Re: Some question about lablgtk2
In-Reply-To: <opr1gesqpwafbmjd at uaapc442>
References: <opr1gesqpwafbmjd at uaapc442>

 Artem Prisyznuk [Thursday 8 January 2004] :
 > Hello,
 > 
 > I start develop aplication using lablgtk2, so in development
 > process some questions was raised.
 > 
 > 1) I read tutorial about GtkTreeView
 > 
 > http://scentric.net/temp/tutorial/sec-custom-models.html#sec-custom-models-when
 > 
 > and I found very useful features in native gtk+-2.0:
 > 
 >     - create custom list and tree models;
 >     - create custom cell renderer;
 > 
 > Is it possible in lablgtk2 use this features?

Right now, no. But it should be feasible.
 - for GtkTreeModel : we have to make a GObject that forwards all
   methods of the GtkTreeModel interface to an ocaml object.
 - ditto for renderers, derive GtkCellRenderer, and implement its
   virtual method by forwarding them to an ocaml object.

 > 2) In gtk exists function gtk-tree-model-foreach, and
 > gtk_tree_model_iter_has_child.
 > 
 > It very useful for movement on tree_model. But I not found analog
 > of these function in lablgtk.
 
Yes, these functions are in the CVS now. I can send you a patch if you
want.

 > 3) It is possible save my custom data type in model store. For
 >    ex. I need some like:
 > 
 > type my_custom_type = ......;
 > 
 > let cols = new GTree.column_list;;
 > let my_data_column = cols#add my_custom_type;;
 
Right now, no. There's no point because the renderers wouldn't know
what to do with the caml value, but if custom renderers are available,
maybe. 

-- 
   Olivier