Re: Is __modified__ graphics prop useful anymore?

[Daniel J Sebald]

On 10/24/2016 04:32 PM, Rik wrote:
> On 10/24/2016 02:14 PM, John W. Eaton wrote:
> > On 10/24/2016 05:10 PM, John W. Eaton wrote:  >> On 10/24/2016 04:48 PM, Rik wrote: >>> 10/24/16 
> > >>> >>> I made the
> graphics property __modified__ a hidden property >>>
> (http://hg.savannah.gnu.org/hgweb/octave/rev/4ea5b0c3b10f).  But, I
> can't >>> see that it is used anywhere usefully in the code.  Maybe it
> had a >>> purpose >>> a long time ago, but should it just be put on the
> road to deprecation >>> now? >> >> Isn't it used in
> base_properties::mark_modified method?  I think the >> purpose is to tag
> a set of properties as modified so that there is a >> quick way to know
> whether something has changed and the object needs to >> be drawn again.
>  > > The base_properties::is_modified method checks the status.  It's
> used in Fdrawnow. >
>
> But nothing seems to set the value to "off".
>
> octave:12> hax = gca;
> octave:13> get (hax, "__modified__")
> ans = on
> octave:14> drawnow
> octave:15> get (hax, "__modified__")
> ans = on
>
> --Rik

Perhaps this is why we see plots being drawn twice quite often, possibly 
all toolkits, but gnuplot for sure, which would most noticeable because 
of its relative slowness.

Dan