[Libreoffice-bugs] [Bug 126933] New: LO Writer shows some Buttons almost Unreadable when using High Contrast Theme

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=126933

            Bug ID: 126933
           Summary: LO Writer shows some Buttons almost Unreadable when
                    using High Contrast Theme
           Product: LibreOffice
           Version: 6.4.0.0.alpha0+ Master
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: trivial
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: adalbert.hanssen at gmx.de

Created attachment 153397
  --> https://bugs.documentfoundation.org/attachment.cgi?id=153397&action=edit
first picture: some depressed and some undepressed buttons in
LibreOfficeWriter.

This bug report pertains to

Version: 6.4.0.0.alpha0+
Build-ID: 9ee5ad5a0b84bfa652da34694ba4f75668f06087
CPU-Threads: 4; BS: Linux 4.4; UI-Render: Standard; VCL: gtk3; 
TinderBox: Linux-rpm_deb-x86_64 at 86-TDF, Branch:master, Time:
2019-07-30_13:21:44
Gebietsschema: de-DE (de_DE.UTF-8); UI-Sprache: de-DE
Calc: threaded
running on Xubuntu 16.04 and as well on 18.04.

I tried windows manager’s theme „Hoher Kontrast“ (probably it is called High
Contrast in an English version). However, using it in connection with
LibreOffice, the buttons which have a permanent on/off state become almost
unreadable when they are activated. 

When depressed, LibreOffice's buttons are flooded with dark color. Since the
key caps inscription is in dark grey, they become almost unreadable then. Try
it out e.g. with bold, italic, underlined, … as shown in my first picture.
First I thought this is a problem of xfwm4, the window manager of xfce4 and I
reported a bug at https://bugzilla.xfce.org/show_bug.cgi?id=15826. However I
was told, xfwm4 has nothing to do with how the applications draw their own
widgets. I should report the bug at the make of the application instead.

If one would just invert the color of the pressed key, the on and off states
for bold/italic/underlined/subscripted/superscripted…. would clearly be
recognized in one or the other state and this would work in any a windows
manager settings as shown in my second picture.

Instead of inverting, one might do a little better by inverting the button
using a negatively bent brightness curve as shown in my third picture.

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