Em 09/11/2017 18:00, Stuart McGraw escreveu:
On 11/08/2017 03:39 PM, Teresa e Junior wrote:
Murrine is GTK+2, you need a GTK+3 theme for current versions of xfce4-terminal.

Thanks, but are you saying that a gtk+3 theme should have steppers
enabled?  I tried the "greybird" theme (seems to be gtk+3 from what
I can tell) but no steppers.  And with Murrine on F23 I *did* have
steppers in xfce4-terminal.

Yes, you would need a GTK+3 theme that has steppers enabled.

There seems to be on the order of ~100 theme packages available
(that's excluding -icon- themes) so downloading and trying randomly
does not seem to be a practical approach.

Indeed. When I want a new GTK+ theme, I browse the themes with screenshots at https://www.xfce-look.org/browse/cat/135/ord/top/ (read more below before doing that). Unfortunately, many screenshots don't show how the scrollbars look like, though.

The only other info I can think to add is that I notice that on
Fedora I was using xfce4-terminal-0.6.3; on Ubuntu it is xfce4-
terminal-0.8.6.

xfce4-terminal 0.6.3 in Ubuntu 16.04 was GTK+2 indeed, but it has been ported to GTK+3 since Ubuntu 16.10. Newer versions of Fedora will most likely be the same.

Additional suggestions or clarification gratefully welcomed...this
problem is seriously hampering my use of Ubuntu.

I have managed to show the scrollbars steppers on Greybird by editing the theme, but scrolling by clicking on the steppers is ridiculously slow (also the steppers are almost transparent):

$ mkdir ~/.themes/
$ cp -r /usr/share/themes/Greybird/ ~/.themes/
$ mousepad ~/.themes/Greybird/gtk-3.0/gtk-contained.css
replace
    -GtkScrollbar-has-backward-stepper: false;
    -GtkScrollbar-has-forward-stepper: false; }
with
    -GtkScrollbar-has-backward-stepper: true;
    -GtkScrollbar-has-forward-stepper: true; }
restart xfce4-terminal

So I went to xfce-look.org, and searched for a GTK+3 theme with the steppers pre-enabled, and found this one https://www.gnome-look.org/p/1013663/ (which is ugly but would serve the test). Scrolling the terminal with it is also painfully slow.

The method I use to scroll the terminal myself is by creating a vertical border to scroll with the touchpad, and also Shift+PageUp and Shift+PageDown will scroll one page of terminal output.

If editing the Greybird theme was not enough for you, you may want to remove this modified version:
$ rm -rf ~/.themes/Greybird/

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