Using Display Styles
Create a TixDisplayStyle object:
set style1 [tixDisplayStyle imagetext -refwindow $tlist \
-foreground #a04040 -font $bold_font]
Use this style for display items of a matching type:
$tlist insert end -itemtype imagetext -image $folder
-text $name -style $style1
$tlist entryconfigure 10 -style $style1
Modify a style on-the-fly:
$style1 configure -foreground white
update idletasks
$style1 configure -foreground black