[Octave-bug-tracker] [bug #58408] closing gnuplot windows without "close" makes other toolkits unusable

[Daniel Molina García]

URL:
  <https://savannah.gnu.org/bugs/?58408>

                 Summary: closing gnuplot windows without "close" makes other
toolkits unusable
                 Project: GNU Octave
            Submitted by: dmolina
            Submitted on: Wed 20 May 2020 05:39:33 AM UTC
                Category: Plotting with gnuplot
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: dev
         Discussion Lock: Any
        Operating System: GNU/Linux

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Details:

I reproduced it in development version and 5.2.

Commands graphics_toolkit("qt") and graphics_toolkit("fltk") work as expected.
However, once graphics_toolkit("gnuplot") is introduced, the former two
commands have no effect when plotting if plot is closed using the environment
(e.g., pressing 'x' in the top corner or ALT+F4). It is, even if
graphics_toolkit print the expected toolkit, the window appearing is always
gnuplot's one.

It does not happen if gnuplot windows are closed by using "close".

Example to reproduce it:

octave:1> x=0:0.1:10; y=sin(x);
octave:2> plot(x,y) # qt window appear. Close window pressing "x" or Alt+F4.
octave:3> graphics_toolkit("fltk")
octave:4> plot(x,y) # fltk window appear. Close window pressing "x" or
Alt+F4.
octave:5> graphics_toolkit("gnuplot")
octave:6> plot(x,y) # gnuplot window appear. Close window pressing "x" or
Alt+F4.
octave:7> graphics_toolkit("fltk")
octave:8> plot(x,y) # *gnuplot* window appear. Close window pressing "x" or
Alt+F4.
octave:9> graphics_toolkit
ans = fltk
octave:10> graphics_toolkit("qt")
octave:11> plot(x,y) # *gnuplot* window appear. Close window pressing "x" or
Alt+F4.
octave:12> graphics_toolkit
ans = qt





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