To: stalkern2 at tin.it
Cc: lablgtk at kaba.or.jp
Subject: Re: Tree and Entry in a file viewer
In-Reply-To: <200301221749.18377.stalkern2 at tin.it>
References: <200301221451.28097.stalkern2 at tin.it>
	<20030122155346.28e64617.maxence.guesdon@inria.fr>
	<200301221749.18377.stalkern2@tin.it>
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Message-Id: <20030123113433Z.garrigue at kurims.kyoto-u.ac.jp>
Date: Thu, 23 Jan 2003 11:34:33 +0900
From: Jacques Garrigue <garrigue at kurims.kyoto-u.ac.jp>
Lines: 22

From: Stalkern 2 <stalkern2 at tin.it>

> OK, so I set everything in order to have an Alignment as the first and sole 
> child of the Tree_item , and then a label as a child of the Alignment.
> 
> The problem now is that I can't get the child of the Alignment using method 
> #children; Alignment is recognized to be a GObj.widget and so I can't use 
> method #children. How can I tell Lablgtk that Alignment is a single-child 
> Container, and that I need the child?

Casts ar available in the Gtk* modules.

The general method to convert a GObj.widget to a GBin.alignment is:

   new GBin.alignment (GtkBin.Alignment.cast w#as_widget)

However, since this cast is often needed, an explicit function is
defined for that (you can pass it any widget):

   GBin.alignment_cast : < as_widget : 'a Gtk.obj; .. > -> GBin.alignment

Jacques