GUIs in Tk, GTK+

require 'gtk2'
Gtk.init

window = Gtk::Window.new
button = Gtk::Button.new("Hello World")
button.signal_connect("clicked") { exit }
window.add(button)
window.show_all

Gtk.main

require 'tk'

root = TkRoot.new
TkButton.new(root) {
	text "Hello World"
	command { exit }
}.pack

Tk.mainloop

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