invalid command name "Hello"
    while executing
"Hello !"
    (in namespace eval "::request" script line 2)
    invoked from within
"namespace eval ::request $script"
    ("::try" body line 12)
OUTPUT BUFFER:
Hello !

I want to have a ttk::combobox with white foreground and black background everywhere, and in whatever the widget state is.
According to ttk::style layout TCombobox, there are elements : textarea, downarrow, field. So I tried to map the states bg and fg for these elements but :
- the pulldown arrow itself stays black (so invisible on a black background)
- the items in the pull-down listbox stay with default colors.

Are there some hidden elements (is that is called sub-layouts ?) that should be mapped also ? Or am i missing something else ?
Here is my test code :


ttk::style configure wb.TCombobox -background black -foreground white
foreach e {"" ".textarea" ".field" ".downarrow"} {
    ttk::style map wb.TCombobox$e \
	    -background [list active black disabled black readonly black] \
	    -foreground [list active white disabled white readonly white] \
	    -fieldbackground [list active black disabled black readonly black] \
	    -fieldforeground [list active white disabled white readonly white] \
	    -selectbackground [list active black disabled black readonly black] \
	    -selectforeground [list active white disabled white readonly white] \
	    -disabledbackground [list active black disabled black readonly black] \
	    -disabledforeground [list active white disabled white readonly white]
}

pack [ttk::combobox .c \
	-style wb.TCombobox \
	-state readonly \
	-values [list aezrty qsdfgh poiuyt]]


Thanks for your help !!
Luc