On Wed Feb 11 2015 at 4:36:55 PM Ben Abbott <address@hidden
> On Feb 11, 2015, at 1:39 PM, Alex K <address@hidden> wrote:
> Is it possible to run a custom function every time any plot is changed? For example, when running `plot`, `axis` etc., if they modify a figure on the screen I would like to detect that and save it to a new file.
> I use gnuplot as backend, so any solution involving configuring gnuplot will also work for me.
If you can provide mode details, someone may have a more efficient solution … but for a general solution I’d add a listener to the figures “children” property.
See “help addlistener” to see how to do that.
Thanks for the reply! For more context, I'm trying to make octave auto-save plots to files on the disk every time they are updated. I've tried addlistener but it doesn't seem to work:
fprintf ("my_handler called\n");
addlistener (gcf, "children", address@hidden, "my string"})
the handler is not getting called.
Ok, that’s embarrassing. I get no error, and it doesn’t work for me either.
There are many examples of this working correctly in Octave’s sources. (take a look at the m-file code of plotyy or subplot for examples).
Does anyone see a problem with Alex’s example?
I filed a bug report.