File: //usr/local/rvm/src/ruby-2.3.8/ext/tk/sample/tkextlib/iwidgets/sample/panedwindow.rb
#!/usr/bin/env ruby
# frozen_string_literal: false
require 'tk'
require 'tkextlib/iwidgets'
pw = Tk::Iwidgets::Panedwindow.new(:width=>300, :height=>300)
pw.add('top')
pw.add('middle', :margin=>10)
pw.add('bottom', :margin=>10, :minimum=>10)
pw.pack(:fill=>:both, :expand=>true)
pw.child_site_list.each{|pane|
TkButton.new(pane, :text=>pane.path, :relief=>:raised,
:borderwidth=>2).pack(:fill=>:both, :expand=>true)
}
pw.fraction(50,30,20)
pw.paneconfigure(0, :minimum=>20)
pw.paneconfigure('bottom', :margin=>15)
Tk.mainloop