On Fri, Mar 07, 2014 at 19:44:30 +0100, Francesco Potortì wrote: > Good news first: > > launching Octave 3.8 from screen under a virtual terminal shows no > problems with fltk. Same from the gui. > > From inside the inferior-octave emacs mode, the plot window appears and > is regularly updated if I make a new plot. If it is resized, the plot > inside is resized only if I replot it. It freezes if I use close or use > the mouse to close the window.
Ciao Francesco, More good news. In case you're not monitoring the upstream bug, I commented that I am now able to reproduce this and think I know the cause. The fltk toolkit relies on the readline event loop running in the Octave shell as its event loop. If readline is disabled (--no-line-editing) or was not compiled in Octave (not the case for Debian) then fltk exhibits exactly the behavior you are describing. It is responsive to commands from the interpreter but freezes after that and cannot react to events originating from the windowing environment. When Octave is running in the Emacs inferior mode, it is given the --no-line-editing option. Therefore, I believe that this is the same underlying cause. And that means that fltk cannot work within Emacs currently. I think there are two possible ways forward. This can be discussed with the Emacs maintainers to see if that option can be removed. If Octave does run readline, does it fatally break the inferior mode interface to Emacs, or is it just doing extra work and the mode authors thought they would be saving some overhead? Another way is to simply prevent the fltk toolkit from being selected as the active toolkit when readline is disabled in Octave. This is already done when DISPLAY is unset, for example. Gnuplot would be used as a fallback. Of course, if you or anyone else can show a case where this fltk problem still happens without the --no-line-editing option and outside of Emacs mode, then there may still be an undiagnosed problem with fltk. -- mike -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
