xfce: changing scrollbar looks

[Lee <ler762@gmail.com>]

Is there a _debian_ doc somewhere that shows how to change the xfce
scrollbar looks?

What I want is the "traditional" scrollbar look - ie. the damn thing
doesn't play hide & seek with me, it looks like a bar instead of a
wire, is wide enough that I can easily click on it when I'm using the
laptop mousepad, has enough contrast between the bar & background so
that I can easily find it, has up/down arrows that scroll the contents
of the window up/down one line at a time, etc.

I've found lots of little snippets, for various systems, that show how
to change one thing but nothing that pulls it all together.  And I'm
*really* sick and tired of making a change & rebooting to see what
effect the change has.

What I've got so far:

$ cat .gtkrc-2.0
style "myscrollbar"
{
    GtkScrollbar::activate-slider      =  0 # if set, slider uses
trough color when sliding
    GtkScrollbar::has_backward_stepper =  1 # if set, display the
standard backward arrow button
    GtkScrollbar::has_forward_stepper  =  1 # if set, display the
standard forward  arrow button
    GtkScrollbar::min-slider-length    = 20
    GtkScrollbar::slider-width         = 16 # width of the scrollbar
    GtkScrollbar::stepper-size         = 16 #
    GtkScrollbar::trough-border        =  2 # spacing between steppers
and outer trough bevel

    GtkScrollbar::has_secondary_backward_stepper = 0 # i want only one button on
    GtkScrollbar::has_secondary_forward_stepper  = 0 # either end of
the scrollbar

      # bg: color of the widget
    bg[ACTIVE]      = "#606060"  # trough colour
    bg[INSENSITIVE] = "#D0D0D0"  # ??? button color ???
    bg[NORMAL]      = "#D0D0D0"  # scrollbar
    bg[PRELIGHT]    = "#E0E0E0"  # button/scrollbar hover
    bg[SELECTED]    = "#FF0000"  # ???

      # fg: color of the text/graphic on the widget
    fg[ACTIVE]      = "#000000"  # button will do something + pressed
    fg[INSENSITIVE] = "#B3B3B3"  # scrollbar at limit, button inactive
    fg[NORMAL]      = "#000000"  # button will do something - pressed
    fg[PRELIGHT]    = "#00FF00"  # ???
    fg[SELECTED]    = "#FF00FF"  # ???
}
widget_class "*Scrollbar*" style "myscrollbar"
class        "*Scrollbar*" style "myscrollbar"

Which gets me pretty close for GTK2 apps.

install qt5-style-plugins to "... also provides the GTK+ 2
platformtheme, which you would likely want to use if you want the GTK+
2 style."

and then set some environment variables:
$ cat /etc/environment
export QT_QPA_PLATFORMTHEME=gtk2
# -LR- try to get QT to use GTK2 theme
# -LR- ?? requires qt5-style-plugins package ??

export GTK_OVERLAY_SCROLLING=0
# -LR- always show scrollbars
# -LR- default is to hide the scrollbar until a mouseover

create a gtk3 css something
$ cat .config/gtk-3.0/gtk.css

.scrollbar, scrollbar {
  -GtkScrollbar-has-backward-stepper: true;
  -GtkScrollbar-has-forward-stepper: true;
  -GtkRange::activate-slider: 0;
  -GtkRange-slider-width: 16;
  -GtkRange-stepper-size: 16;
}


and I'm getting there.  Slowly.  I'm hoping to get some pointers on
how2doit so I can quit the whole "make a change, reboot, see how it
looks" loop.

Thanks,
Lee