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Message-ID: <17143.26260.182393.468416 at karryall.dnsalias.org>
Date: Mon, 8 Aug 2005 16:05:08 +0200
From: Olivier Andrieu <andrieu at ijm.jussieu.fr>
To: Yann LE FABLEC <yann.le-fablec at cena.fr>
Cc: LablGTK Mailing List <lablgtk at math.nagoya-u.ac.jp>
Subject: Re: How to temporarily disable GTree sorting ?
In-Reply-To: <42F74918.4090503 at ath.cena.fr>
References: <42F74918.4090503 at ath.cena.fr>

 Yann LE FABLEC [Monday 8 August 2005] :
 >
 > Dear all,
 > 
 > I am trying to use GTree.view/model in order to display informations as
 > a list.
 > Everything works fine except when I use sorting :
 > 1. First, I create a model + a view, insert my elements in the model
 > 2. Using set_sort_func & set_sort_column_id I tell the view to allow
 >     the user to sort data in the GTree.view.
 > 3. Then later I want to display new data in my model/view : I first
 >     detach the model from the view, clear the model and insert my new
 >     elements.
 > 
 > The problem is that this third step is extremely slow as, as stated
 > in the Tree View tutorial, the elements are sorted after each
 > insertion. In this tutorial, one can read that to get rid of that
 > slowdown problem, one has to "make sure that sorting is disabled while 
 > you are doing your mass insertions".
 > (See : 
 > http://compiler.kaist.ac.kr/~shoh/ocaml/lablgtk2/treeview-tutorial/ch03s03.html#sec-treestore-adding-many-rows).
 > 
 > I can't find the way to achieve this. I have searched through this
 > mailing-list, on Internet, in the GTK+-2.0 C API reference but I was not
 > able to find how to temporarily disable the tree sorting while I insert
 > new elements in it.
 > 
 > Does someone know how to do this ??? Help would be greatly appreciated,

Try using #set_sort_column_id (on the list store) with a column id of -2.

There are two special values of column ids :
  GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID = -1,
  GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID = -2
These should probably appear somewhere in GTree, I'll add them.

-- 
   Olivier