[Octave-bug-tracker] [bug #56158] editor file name tabs need improvement

[Andrew Janke]

Follow-up Comment #6, bug #56158 (project octave):

I can reproduce the missing-X behavior in Octave.app 5.1.0 beta 3, which is
built using Homebrew (instead of MacPorts), and is using Qt 5.11.2 (where
MacPorts is using Qt 5.12.x).

https://user-images.githubusercontent.com/2618447/56400560-80279a80-6222-11e9-80ae-86c650333973.png

https://github.com/octave-app/octave-app/issues/31

The weird thing is that Octave.app 4.4.1 was also built against the same Qt
5.11.2, and it doesn't have the issue; it always shows the Xs just fine. This
does sound like a Qt glitch to me too, but it doesn't seem like it's a change
in Qt itself that made it appear.

I'd be surprised if this were an option that was being set: the little area on
the left of the tab where the X appears is still active as a "Close" button if
you click it, so it doesn't seem like it's turned off completely. And having
the X appear only on the selected tab but not the others is really weird.

No clue what's going on here.

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