GtkSourceView (gedit - Text Editor and others) wrongly has monospaced font in dropdown (context) menu

The correct (expected) font is presented on the screenshot from Ubuntu MATE 16.04 LTS.

The issue:
* exists with the following themes - Ambiant-MATE, Ambiant-MATE-Dark, BlackMATE, GreenLaguna, Radiant-MATE, TraditionalGreen, TraditionalOk;
* does not exist with BlueMenta, Blue-Submarine, Green-Submarine, High Contrast, High Contrast Inverse, Menta.

So all default `mate-themes` themes should be changed to have normal font in aforementioned dropdown menus. See BlueMenta as good example in attachment.

The problem is also exists in Gedit, which is by default themed with Ambiance theme from `light-themes` package.
Problem confirmed on Ubuntu session (means GNOME) of Ubuntu 18.04.2 LTS and in upcoming 19.04 while running Unity desktop. Here only Adwaita theme looks correct.

So all modern GTK themes should be fixed to correctly show drop-down menu in GtkSourceView.

Did you try changing font by de-selecting "use system fixed width font" ?

I'm using default clean installation of Ubuntu with default settings of GNOME desktop (say 18.04 LTS).

> Did you try changing font by de-selecting "use system fixed width font" ?

Going to Preferences → Font & Colors → Font, and deselecting "use system fixed width font" substitutes font with other monospaced font - see image.

So this is not a solution.

Status changed to 'Confirmed' because the bug affects multiple users.

@Norbert

No, I actually wanted you to change the font from gedit preference. For example select purisha oblique.

Reset geit pref. Install tweak-tool. Try changing monospace font. It will change both context menu and soureview font.

But I think you are right by default it is set to monospace font. But you can force it to use other fonts.

And yes this can be set in the theme too.

It doesn't seem an issue on a default disco install with the new yaru theme?

@seb128

Yaru theme on regular Ubuntu desktop (GNOME Shell) is not affected.

In lp: #1242984 light theme is already using (see https://code.launchpad.net/~larsu/ubuntu-themes/gedit-fixes/+merge/201212)

.context-menu { font: regular medium;}

not sure why it is not working. May be it needs to use font-family. So changing it in ~/.config/gtk-3.0/gtk.css works for me.

.context-menu {
    font-weight: medium;
    font-family: regular;
}

Thanks, Khurshid!

I automated your method by

```
mkdir -p ~/.config/gtk-3.0

cat > ~/.config/gtk-3.0/gtk.css << EOF
.context-menu {
    font-weight: medium;
    font-family: regular;
}
EOF
```

and got almost normal context menu in Pluma.

For reference this is the commit for ubuntu-mate-artwork that resolves this issue in our themes:

  * https://github.com/ubuntu-mate/ubuntu-mate-artwork/commit/da425237ea3eba1e95d95154af25150dc94d7f50

This bug was fixed in the package ubuntu-mate-artwork - 19.10.2

---------------
ubuntu-mate-artwork (19.10.2) eoan; urgency=medium

  * Add suggested-action button style.
  * Add -secure icons required for correct VPN icon display in
    AppIndicator mode. (LP: #1681654)
  * Add Apport icons.
  * Optimise all .png and .jpg image assets.
  * De-duplicate icon themes.
  * Fix low contrast text selection in dialog windows. (LP: #1763942)
  * Fix inconsistent OK buttons.
  * Fix model buttons popovers.
  * Fix styling of paned headerbars.
  * Increase treeview expander size.
  * Increase minimum size of checkbox/radio buttons.
  * Improve font and font-size for context-menu. (LP: #1823550)
  * Improve spacing and padding for tabs, toolbars, menu items and column
    headers.

 -- Martin Wimpress <email address hidden> Mon, 20 May 2019 08:12:40 +0100