From: Olivier Andrieu <andrieu at ijm.jussieu.fr>
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Message-ID: <16476.29143.422239.542096 at karryall.dnsalias.org>
Date: Sat, 20 Mar 2004 17:31:19 +0100
To: Henri Binsztok <Henri.Binsztok at lip6.fr>
Cc: lablgtk at kaba.or.jp
Subject: Re: GnoCanvas question
In-Reply-To: <1079790058.22467.30.camel at seamaster>
References: <1079790058.22467.30.camel at seamaster>

 Henri Binsztok [Saturday 20 March 2004] :
 >
 > Hi
 > 
 > I am beginning to use lablgtk, and while many things just work, one
 > problem persist.
 > 
 > I want to delete all items from the whole canvas or a given
 > GnoCanvas.group (canvas#root or another). Therefore, I tried
 > unsuccessfully two ways:
 > 
 > - List.iter canvas#remove canvas#children 
 > which does not work, since canvas#children is always an empty list...

Yes: canvas is a GtkWidget, derived from GtkContainer. That's where
the #children method comes from. However the GnomeCanvasItem are not
widgets so they do not appear in this list.

 > - Use group#get_items, which gives a GnomeCanvas.item Gobject.obj list,
 > but then to use the GnoCanvas.item#destroy method, I need to convert
 > those items, which I couldn't figure out :(

You can simply destroy them directly with GtkBase.Widget.destroy :
 List.iter GtkBase.Widget.destroy group#get_items

-- 
   Olivier