Support for the Ruby 2.3 series has ended. See here for reference.
# File tk/lib/tkextlib/iwidgets/shell.rb, line 21 def activate tk_call(@path, 'activate') # may return val of deactibate method end
# File tk/lib/tkextlib/iwidgets/shell.rb, line 25 def center(win=None) tk_call(@path, 'center', win) self end