ruby

test.rb

#!/usr/bin/ruby
require 'gir_ffi-gtk3'
Gtk.init

win = Gtk::Window.new(:toplevel)
win.title = "Hello World"
win.signal_connect "delete-event" do
	Gtk.main_quit
	false
end

onclick = lambda { |widget, data|
	new_win = Gtk::Window.new
	label = Gtk::Label.new("Tweet!")
	label.show
	new_win.add label
	new_win.show
}

button = Gtk::Button.new_with_label("Button")
button.signal_connect "clicked", &onclick
button.show
win.add button
win.show

Gtk.main