[Scilab-users] Scilab console, xwindows -- plotting kills console keyboard

[shorne at energetiq.com]

RE the bug described below.. 

I can't run precisely through the sequence you recommend - 
but I did discover this - 

The problem is related to the scilab console loosing focus. 
To produce the bug all I need to do is click outside the 
console window.  Normally, the 4 separate  windows in the console - when 
you click
inside any of them, the title bar turns black, indicating the location of 
keyboard focus.
I can click from pane to pane and see the title turn black.

But if I click once outside the console (to this email, for instance)
then I cannot get keyboard focus back to scilab.
The main scilab window (Scilab 5.4.1 Console) lights up to indicate focus,
but the individual panes don't get focus when I click in them.

The -->| vertical cursor still blinks, if that helps.. 

I also tried capturing the scilab session within a separate xserver:.  I 
tried xnest, but this worked better... 

Xephyr :1 -screen 1000x1000 &
xterm  -display :1 -e "/home/shorne/src/scilab-5.4.1/bin/scilab"

This required usecanvas(%T) but otherwise
worked fine.  Focus could be moved around at will without getting lost.
(This was the minimal case.  I tried first running a window manager in the 
display - that worked fine as well.)

  Oddly, plotting seemed faster.

Hope this helps find the bug - 

Steve














Antoine Monmayrant <antoine.monmayrant at laas.fr> 
Sent by: users-bounces at lists.scilab.org
08/06/2013 01:02 PM
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Subject
Re: [Scilab-users] Scilab console, xwindows -- plotting kills console 
keyboard






His Steve,

I think you need to run a couple of tests to see where the problem comes 
from.
Here is what I propose:

1) Write the smallest script that raises the issue: like a script with 
just "scf()" or "plot()" then some other commands.
2) Try to run this script locally on the linux box to see if the problem 
is still present. If not this means your problem is linked with the remote 
use of scilab.
2bis) If the problem is due to the remote connection, try to run scilab 
remotely from another linux box (to rule out cygwin as a possible cause).
3) Try to run remotely scilab -nw (to avoid the fancy console as you call 
it). See if you script still causes an issue.
4) Try to run the last official version of scilab and also maybe the last 
nightly build of the master branch to see if the issue is still there.
5) Report on your progress here and we'll try to see whether it's a scilab 
bug, a debian bug or something else.

Antoine

Le 06/08/13 16:09, shorne at energetiq.com a écrit :
I work in a windows environment.(xp)   I usually use scilab on a linux 
computer, with display set to the windows
box via the cygwin xserver.  I have used this configuration happily with 
scilab 4.0.  Never an issue.

Open a cygwin xterminal on the xp box
log into linux box with ssh -Y in that xterminal
type "scilab" into the xterminal
All works well.  The linux box runs an old version of mandrake
 uname -a
Linux dataserver.energetiq.com 2.6.11-6mdk #1 Tue Mar 22 16:04:32 CET 2005 

i686 Intel(R) Pentium(R) 4 CPU 2.80GHz unknown GNU/Linux
I have used this scheme for years, running "production" code for data 
analysis.


Recently I decided to upgrade the linux machine to a more modern 
distribution -- Mint Debian. 
$ uname -a
Linux dataserver1 3.8.0-19-generic #29-Ubuntu SMP Wed Apr 17 18:19:42 UTC 
2013 i686 i686 i686 GNU/Linux

I installed  scilab 5.x - to get access to some of the newer atoms 
toolboxes.
I should say this is the debian scilab installed via apt-get.

$ scilab -version
Scilab version "5.4.1.1364571296"
scilab-5.4.1

Now, if I start up scilab, the fancy new console comes up and works until
I plot once.  Or do anything to bring up a plot window. (eg, demo 

After that I can no longer type into the console.  cut/paste with the 
mouse works; but keyboard is dead,
when typing into the scilab window.  Works fine on all other xterms.

What can I do to fix this? 

Thanks,
Steve























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