borderless MacOS menus (was 'Gtk3 MacOS (OSX) context menu issues')

[Roger Davis <rbd soest hawaii edu>]

Hi all,

Thanks to Jim Charlton for the nice fix (or workaround) on the context 
menu problem! I've had a MacOS menu problem for some time which may be 
related to this, but as it's a bit off-topic re: the context menu thread 
I've started a new thread here.

My MacOS gtk3 menus have no borders whatsoever, a rather annoying graphics 
glitch. This includes menus built-in to gtk3 widgets (e.g., made from 
gtk_combo_box_text_new()) as well as those made directly by me via 
gtk_menu_new(). The same menus look fine under CentOS.

I'm using a perhaps unusual gtk3 setup under MacOS (although it does seem 
like many folks' MacOS gtk3 installs are unique). I am running the XQuartz 
backend with a very minimal gnome environment. I set XDG_CONFIG_HOME to 
reference my own private settings.ini file with the contents

[Settings]
gtk-application-prefer-dark-theme = false
gtk-theme-name = Adwaita
gtk-icon-theme-name = Adwaita
gtk-font-name = Cantarell 12

This at least solved a recent font problem of mine (see the Feb. 2015 
'gtk3 (GtkTextView) and MacOS' thread), so it seems to be doing something 
useful, and my shadowless menu issue pre-dates use of this file so it's 
not the source of the current problem. However, I'm not sure how to make 
any use of Jim's shadow-removing workaround to *add* shadows to my menus, 
since:

(1) It seems that shadowed menus are supposed to be default bahavior, but 
I'm not getting shadows despite having done nothing to disable them.

(2) My /opt/local/share/themes/Adwaita/gtk-3.0/gtk.css contains only the 
comment line

/* Adwaita is the default theme of GTK+ 3, this file is not used */

implying there's nothing I can add there that will make the slightest bit 
of difference anyway.

Of course, probably I should just be grateful that I don't suffer from the 
MacOS context menu sensitivity problem and leave well enough alone!

Does anyone have any ideas? Thanks!

Roger Davis
Univ. of Hawaii

> From: Jim Charlton <charltn gmail com>
> To: gtk-app-devel-list gnome org
> Subject: Re: Fwd: Gtk3 MacOS (OSX) context menu issues
>
> To answer part of my own question.... I am using my own gtk3 theme
> rather than the compiled Adwaita theme that comes with Gtk3.  I set the
> environment variable XDG_CONFIG_HOME (export
> XDG_CONFIG_HOME=/opt/local/share/themes/Adwaita/gtk-3.0), edited
> /opt/local/share/themes/Adwaita/gtk-3.0/gtk.css to "@import
> url("gtk-main.css");" and then edit
> /opt/local/share/themes/Adwaita/gtk-3.0/gtk-main.css to customize the
> theme. (careful... your theme directory may be elsewhere, depending on
> how you installed Gtk3).
>
> To cure the context menu problem, I eliminated the margin on popup
> windows by adding
>
> |.window-frame,
> .window-frame:backdrop {
>   box-shadow: none;
>   margin: 0;}
>
> to the end of the gtk.css file.  Without the margin box the selection 
> problem seems to go away.
>
> This is not a cure... but perhaps a useful work-around!  The inspiration 
> for this idea comes from https://forum.xfce.org/viewtopic.php?pid=36005.