gist embed お試し 最新から拾ってきただけ require 'hotcocoa' include HotCocoa application :name => "Hello World" do |app| window :size => [150, 100] do |win| win.view = layout_view :mode => :vertical do |layout| layout.spacing = 10 lbl = label(:text => "", :layout => {:align => :center}) btn = button(:title => "Say Hi", :layout => {:align => :center}) btn.on_action { lbl.text = "Hello World" } layout << lbl layout << btn end win.will_close { exit } end end