File: //usr/local/rvm/src/ruby-2.3.8/ext/tk/sample/tkextlib/iwidgets/sample/shell.rb
#!/usr/bin/env ruby
# frozen_string_literal: false
require 'tk'
require 'tkextlib/iwidgets'
sh = Tk::Iwidgets::Shell.new(:modality=>:application,
:padx=>20, :pady=>20, :title=>'Shell')
TkButton.new(:text=>'ACTIVATE', :padx=>7, :pady=>7,
:command=>proc{puts sh.activate}).pack(:padx=>10, :pady=>10)
TkLabel.new(sh.child_site, :text=>'SHELL').pack
TkButton.new(sh.child_site, :text=>'YES',
:command=>proc{sh.deactivate 'press YES'}).pack(:fill=>:x)
TkButton.new(sh.child_site, :text=>'NO',
:command=>proc{sh.deactivate 'press NO'}).pack(:fill=>:x)
Tk.mainloop