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List:       koffice-devel
Subject:    Re: Patch for KPresenter (Undo and Redo with Text Object)
From:       Werner Trobin <trobin () kde ! org>
Date:       2001-05-24 13:18:09
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David Faure wrote:
> 
> On Thursday 24 May 2001 14:28, Werner Trobin wrote:
> > David Faure wrote:
> > >
> > > On Thursday 24 May 2001 08:11, Werner Trobin wrote:
> > > > Toshitaka Fujioka wrote:
> > > > >
> > > > > On Tuesday 22 May 2001 19:44, Toshitaka Fujioka wrote:
> > > > > [snip]
> > > > > > 2. Crash assumes that I execute Redo after I select it more than
> > > > > >    one character, and pushed Del or Back Space or Ctrl+X key.
> > > > > >    (Even if this problem doesn't apply a patch, it is generated.)
> > > > >
> > > > > Sorry, it is not Redo. It is Undo.
> > > >
> > > > I'm sorry, but I don't have the time right now (exams,
> > > > projects,...). Anyone?
> > >
> > > Hmm, ok, but you wrote this undo/redo integration (between the text-object
> > > and kpresenter's global history). Does the patch look sensible at first sight
> > > (i.e. not necessarily testing it) ?
> >
> > The problem I see is that it manipulates the local text object
> > history and not the global one. I didn't test it, but I can
> > imagine that some commands are undone and still are "scheduled
> > for undo" in the global history.
> 
> I see.
> 
> > The connection between those histories is really simple: Every time
> > a text object creates a command for its history we store a fake
> > command in the global history. If we undo that one, we forward the
> > undo request to the local history. Period. This will get out of
> > sync with this patch :}
> 
> Yes, that's exactly how I did it in KWord too.
> If the problem is with "redo" only, doesn't that mean that you forgot to
> do the same with redo ?

Huh? The fake action just forwards undo and redo. If the command
is inserted once it should work all the time. Sorry, but I don't
get your question. One possibility is that undo/redo itself is
broken in this very early version of QRT :}

Ciao,
Werner

-- 
Werner Trobin - trobin@kde.org
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