表格式包装实例

这里，我们构造了一个包含三个按钮的 2x2 表格。前两个按钮时放在第一行，第三个，退出按钮，放在下一行，占满整行。

下面是源代码:

#!/usr/bin/env ruby

require 'gtk2'

window = Gtk::Window.new("Table")
window.signal_connect("delete_event") do
    Gtk.main_quit
    false
end
window.border_width = 20

# Creates a 2x2 table.
table = Gtk::Table.new(2, 2, true)
window.add(table)

[1, 2].each do |i|
    button = Gtk::Button.new("button #{i}")
    button.signal_connect("clicked") do
        puts "Hello again - button #{i} was pressed"
    end
    # Insert button 1 into the upper left quadrant of the table,
    # and button 2 into the upper right quadrant of the table.
    table.attach_defaults(button, i - 1, i, 0, 1)
end

button = Gtk::Button.new("Quit")
button.signal_connect("clicked") do
    Gtk::main_quit
end

# Insert the quit button into the both lower quadrants of the table.
table.attach_defaults(button, 0, 2, 1, 2)

window.show_all
Gtk.main