X-Authentication-Warning:	delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient:	geda-user AT delorie DOT com
Date:	Fri, 13 Jul 2012 15:31:58 -0700
From:	Colin D Bennett <colin AT gibibit DOT com>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] Question/advise/suggestion on gschem 'undo'
Message-ID:	<20120713153158.118f8568@svelte>
In-Reply-To:	<20120713192118.3132.qmail@stuge.se>
References:	<20120713122112 DOT 3247247ee710b39349b6bc74 AT jcoppens DOT com>
	<20120713192118 DOT 3132 DOT qmail AT stuge DOT se>
X-Mailer:	Claws Mail 3.8.0 (GTK+ 2.24.10; x86_64-pc-linux-gnu)
Mime-Version:	1.0
X-AntiAbuse:	This header was added to track abuse, please include it with any abuse report
X-AntiAbuse:	Primary Hostname - gator297.hostgator.com
X-AntiAbuse:	Original Domain - delorie.com
X-AntiAbuse:	Originator/Caller UID/GID - [47 12] / [47 12]
X-AntiAbuse:	Sender Address Domain - gibibit.com
X-BWhitelist:	no
X-Source:
X-Source-Args:
X-Source-Dir:
X-Source-Sender:	(svelte) [67.160.113.82]:43452
X-Source-Auth:	colin AT gibibit DOT com
X-Email-Count:	1
X-Source-Cap:	c2t5bGVuO3NreWxlbjtnYXRvcjI5Ny5ob3N0Z2F0b3IuY29t
Reply-To:	geda-user AT delorie DOT com
Errors-To:	nobody AT delorie DOT com
X-Mailing-List:	geda-user AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

On Fri, 13 Jul 2012 21:21:18 +0200
Peter Stuge <peter AT stuge DOT se> wrote:

> John Coppens wrote:
> > To my surprise the number of levels of undo was very limited.
> ..
> > (undo-levels 10)
> ..
> > Are the resources necessary for undo levels so large?
> 
> I would also like to know this.
> 
> 
> > Would it be a problem to have, say, 100 or even 500 undo levels?
> 
> Make that 50000, or simply infinite in a linked list.
> 
> How are actions stored in memory?
> 
> 
> //Peter

It would probably make sense to limit the actual memory consuption
as well.  For instance, the GIMP has the following two items under
Preferences > Environment > Resources Consumption:

  Minimal number of undo level: 5
  Maximum undo memory:          64 megabytes

There are always at least 5 (in this case) undo levels, but as many
as can fit in 64 MB (according to current setting) will be saved.

This is a great solution.

Regards,
Colin

- Raw text -