[Octave-bug-tracker] [bug #60051] awkward behavior of GUI editor pane (in Octave 6.1.90)

[Hartmut]

Follow-up Comment #2, bug #60051 (project octave):

I am not sure if there has already been another bug report on these issues. I
had only seen two of your commits in the repo some weeks ago (be61ce9c3126 and
bd5961abe971) and was assuming they were intending to fix this behavior I
observed with Octave 6.1.0. But looking a bit close, those commits are linked
to bug #59628, and I am not sure of this is the same problem at all.

first issue: Yes I can reproduce this every single time on my linux machine.
When I have one (or also several) m-files open in tabs of the m-file editor,
then close all those tabs, and afterwards close the Octave GUI, then those
closed tabs will "magically" (but unwantedly) re-appear after a restart of
Octave.

second issue: This happens repeatedly on my Win10 installation of Octave: In
the issue I meant, the edit widget is still present in the GUI layout. It is
just totally empty. I will attach a screenshot to show what I mean  ("GUI
without editor.png")

For the second issue I "played" a bit with the GUI layout (Win10), according
to your suggestions, the results might be helpful to reproduce this:
* On startup of the Octave GUI the editor pane is there but empty. (Screenshot
"without editor").
* When I emit the command "edit" directly after GUI startup, then the editor
pane content appears (see screenshot "after edit command").
* I can also (directly after startup) press Ctrl-4 instead, this also make the
editor pane content appear.
* When I reset the windows layout to default (by the corresponding menu
entry), then the editor pane becomes also fully visible. So far so good. But
there are interesing tweaks to it:
** When I stick to this "default GUI layout", then the editor pane stay fully
visible even after a restart of the Octave GUI. Good.
** When I re-arrange the GUI, to have the editor pane in the top right quarter
of the GUI, and leave everything else as in the default layout, then the
editor pane also stays visible (and full) after restart. Good as well.
** BUT: When I re-arrange all the GUI panes as I had them before (my favorit
GUI layout), you can see how this looks like in the sceenshots, then the
editor pane again becomes empty after restart!

So this behavior seems to have something to do with the precise Windows pane
layout you choose inside the Octave GUI. Can someone now reproduce this
"akward" behavior with the editor pane, when using the SAME window layout as I
do (as can be seen in my screenshots)?

(file #50861, file #50862)
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Additional Item Attachment:

File name: GUI without editor.png         Size:72 KB
    <https://file.savannah.gnu.org/file/GUI without editor.png?file_id=50861>

File name: GUI after edit command.png     Size:82 KB
    <https://file.savannah.gnu.org/file/GUI after edit
command.png?file_id=50862>



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