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#!/usr/bin/env ruby require 'tk' require "tkextlib/tkimg/jpeg" require "open-uri" photo = open("http://www.oschina.net/img/logo.png", "rb") {|io| io.read} TkRoot.new {title "Sunrise" } TkLabel.new { image TkPhotoImage.new( :data => Tk::BinaryString( photo ) ) width 300 pack } TkLabel.new { font TkFont.new( 'verdana 24 bold' ) text "Sunrise at sunset!" pack } TkButton.new { text 'Quit' command 'exit' pack } Tk.mainloop