Re: Undo framework

[Rodrigo Moya <rodrigo gnome-db org>]

On Mon, 2007-09-24 at 09:23 -0400, Jody Goldberg wrote:
> On Mon, Sep 24, 2007 at 02:41:19PM +0200, Rodrigo Moya wrote:
> > 
> > On Fri, 2007-09-21 at 16:21 -0300, Johan Dahlin wrote:
> > > 
> > > I'm not sure we should talk about a 'document' there, there are many 
> > > operations outside of documents which are undoable.
> > > 
> > yes, we are not talking only about document, and yes, I think it should
> > be in Glib, except for the widgets that might be needed.
> 
> Agreed.
> 
> > As for transation-based framework, I'm not sure exactly what Jody is
> > thinking about, but to me, if I understood it correctly, it makes a lot
> > of sense to be able to group performed actions into a set that can be
> > undone/redone and even repeated. That would, probably, fit the GIMP's
> > needs, as stated by Sven, to have nested undo groups. Each group would
> > be a transaction, that can be redone/undone/repeated as a single entity.
> 
> The 'transaction' refered to a mechanism for persisting the details
> of each operation to a file.
>     1) The options could be re-played in the case of failure.
>     2) The data would provide useful hooks for auditing and
>        validation.
> 
> It seems useful for anything that operates on persistent data, be it
> a document, or control-center settings.
>
I'm thinking, maybe a crazy idea though, but this could also be useful,
once the actions are stored in a file, to be able to repeat/run those
actions outside of the application. That is, you could do a set of
operations on a document-oriented application, save that to a file, and
use that as a sort of 'script' to do the same operations on another
document.
-- 
Rodrigo Moya <rodrigo gnome-db org>