#305 Selection text illegible on Mac OS X

[Peter Caffin]

Selected text on Mac needs have the font as a light colour (white?) rather than black, otherwise it's unreadable: eg, http://pc.autons.net/stuff/ttk_treeview_unreadable_macosx.png

In the treeview case above, the stop-gap fix is:

ttk::style map Treeview \
-background { {selected background} systemHighlightSecondary selected systemHighlight } \
-foreground { {selected background} systemDialogInactiveText selected white }

Joe mentioned on the Tclers Chat that: There doesn't appear to be a kThemeTextColorXyzzy constant that contrasts with "HighlightColor" to replace "white" with in a platform sound way.

[Joe English]

Refiled as Tk artifact #2908379.