require 'gtk2'

builder = Gtk::Builder.new
builder.add_from_file("food.glade")

tree = builder.get_object('food_tree')
model = tree.model

i = model.append
model.set_value(i, 0, 'Jane')
model.set_value(i, 1, 'Pizza')

i = model.append
model.set_value(i, 0, 'John')
model.set_value(i, 1, 'Burger')

tree.model = model

window = builder.get_object('food_window')

window.signal_connect('delete_event') do
  Gtk.main_quit
  false
end

col = tree.get_column(0)
cell = Gtk::CellRendererText.new
col.pack_start(cell, true)

window.show

Gtk.main