Ok - I've read the request and got the idea.

I have the followwing proposal:
what if one had a set of pre-loaded selections, and could switch back 
and forth among then with a single keystroke - Do you (and others) 
think it could  be as usefull/more usefull/just the same as these 
proposed drawing zones? 
 
Why do I ask this?
Because implementing what you are asking requires some fiddling in the 
core, and will complicate the interface with another kind of object, 
besides selections, channels, layers, masks, guides, sample points 
and the grid...

Ok, you can imagine that what it brings of convenience for some it 
brings of complication to certain user groups.

The idea I propose, instead, would use already existing objects, like 
this: one would store his drawing zones as a set of selections, each 
in a separate image channel, and a simple script, with no imput 
parameters, would replace the current selection with a selection in 
the channel stack.

Todo this manually, one would have to:
1) select the channel tab in the layers/channels dock
2) select the apropriate channel
3) click on "channel to selection"
4) change back to the layers tab on the dock
5) select the actyual layer where one is drawing back
6) start painting.

Looking at this, it si a lot of work, and the drawing zones seems a 
better idea.
However, a script fu can perform steps 1-5 with a single keystroke (if 
one will select the next/same/previous channel on the stack that has 
been previusly used). so it becomes:
1) hit key that changes teh selection until the desired selection is 
set
2) start painting

Which seems as practical as the drawing zones proposal.

There is a final advantage in this proposal: it is ready for serving 
_now_,a s writing such a script would take less than 30min.

What do you say?

        js
        -><-


On Tuesday 16 January 2007 20:54, David Gowers wrote:
> On 1/17/07, Thorsten Wilms <[EMAIL PROTECTED]> wrote:
> > Hi!
> >
> > So I was asked to suggest new features on the mailing-list and
> > only file bug report after they have been discussed there ... and
> > it seems theres a misunderstanding to be resolved and i wouldn't
> > mind more exposure for this ... :)
> >
> >
> > My proposal is about an alternative to using either layers
> > or saved selections to draw on areas of an image with sharp
> > edges between them.
> >
> > http://bugzilla.gnome.org/attachment.cgi?id=80388
> >
> > Shows a typical case, ignoring the background we have
> > two such areas: body and hand.
> >
> > Drawing zones are about dividing the image into 2 or more
> > (non-overlapping) regions. These zones would be a bit like
> > multiple selections. If you start drawing in one zone, you can't
> > draw over another zone without releasing the mouse-button /
> > lifting the pen (same effect as drawing outside of the current
> > selection).
> >
> > Such a feature would remove the need for using layers and moving
> > between them
> > or constantly changing selections in cases where adjacent areas
> > need sharp edges between them.
> >
> > Using layers would mean constant switching between them. Same for
> > selections. Long mouse-ways in both cases. Zones, once setup
> > could be left active for long durations.
> >
> > This has nothing to do with split-views, Sven, as the image is
> > shown the same way, not in parts. You would just need marching
> > ants or similar for the zone extents and the ability to hide
> > them.
> >
> > If it's still unclear, I'll provide graphical explanation.
> >
> >
> > http://bugzilla.gnome.org/show_bug.cgi?id=397237
>
> This would be wonderfully useful to me for CGing. You would need to
> be able to define zones per-layer - It would only greatly reduce
> the need for layers, not obviate them completely, for example when
> I'm making an alternate coloration or remake of something, I like
> to paste it over the original as a new layer, and use the enter key
> to toggle it's visibility.
>
> I think you would have to use saved selections rather than layers,
> to avoid the strange 'sibling-effects-sibling' behaviour (ie one
> layer is real, other is zonemasks, but they're both in the same
> list). If you specified a rule such as 'zonemasks are always the
> layer immediately above the layer they apply to, if the layer has
> zonemasks at all' you could probably manage layer based zonemasks
> (of course they're better cause they can be in color.)
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