installing and using tk in ruby, fwiw:
1 download latest tcl/tc fr activestate (
https://www.activestate.com/activetcl/downloads). by default it downloads
2 set lib location (wc is under /opt/ if you opted for the default) using
3 use tk in ruby using ffi-tk gem (https://github.com/manveru/ffi-tk)
4 try the examples included in ffi-tk. they should work.
many thanks and kind regards,