[ChangeSet] print.m: support for figure handles

[Ben Abbott]

On Mar 4, 2008, at 2:46 PM, John W. Eaton wrote:

> On 29-Feb-2008, Ben Abbott wrote:
>
> |
> | On Feb 29, 2008, at 6:58 PM, Ben Abbott wrote:
> |
> | >
> | > On Feb 29, 2008, at 5:24 PM, John W. Eaton wrote:
> | >
> | >> On 29-Feb-2008, Ben Abbott wrote:
> | >>
> | >> When you want to make a temporary change to some global state  
> like
> | >> the
> | >> current figure, you should use unwind_protect to prevent the  
> change
> | >> from sticking in case an error occurs or an interrupt arrives  
> while
> | >> the setting is in the changed state.  For example
> | >>
> | >> old_fig = get (0, 'currentfigure');
> | >> unwind_protect
> | >>   figure (arg);
> | >>   ...
> | >> unwind_protect_cleanup
> | >>   if (ishandle (old_fig))
> | >>     figure (old_fig)
> | >>   endif
> | >> end_unwind_protect
> | >>
> | >> jwe
> | >
> | > ahhh-ha ... very cool!
> | >
> | > I'll make the change!
> | >
> | > The indent between unwind_protect and the cleanup will mean nearly
> | > all lines will be included in the changeset. Is that ok?
> | >
> | > Ben
> |
> | ok, the not so trivial changeset is attached ;-)
>
> I applied this patch.
>
> Should the handle be allowed in any position in the argument list?
> Should there be an error if more than one figure handle or filename
> argument is found?
>
> Thanks,
>
> jwe

I pondered that for a bit, but decided I had no motivation to place a  
restriction on the syntax.

.... hmmm .... actually that's not really so much the problem as would  
be the extra effort to do otherwise ;-)

If you'd prefer the syntax to be restricted, I can take care of it.  
Say the word!

Ben