借助RubyGnome2库进行GTK下的Ruby GUI编程的基本方法

 
最后，贴上一个计算器的界面部分的代码例子，你能从代码中看出UI布局么？

require 'gtk2' 
require 'simple_layout' 
 
class MyWin < Gtk::Window 
 include SimpleLayout::Base 
 def initialize 
  super 
  add my_layout 
  signal_connect('destroy') do 
   Gtk.main_quit 
  end 
 end 
 
 def my_layout 
  vbox do 
   with_attr :border_width => 3 do 
    hbox do 
     entry :id => :ent_input, :layout => [true, true, 5] 
    end 
    hbox do 
     frame do 
      label 'M', :set_size_request => [20, 20] 
     end 
     hbutton_box do 
      button 'Backspace' 
      button 'CE' 
      button 'C' 
     end 
    end 
    hbox do 
     vbutton_box do 
      button 'MC' 
      button 'MR' 
      button 'MS' 
      button 'M+' 
     end 
     with_attr :layout => [true, true] do 
      number_and_operators_layout 
     end 
    end 
   end 
  end 
 end 
 
 def number_and_operators_layout 
  vbox do 
   [ ['7', '8', '9', '/', 'sqt'], 
    ['4', '5', '6', '*', '%'], 
    ['1', '2', '3', '-', '1/x'], 
    ['0', '+/=', '.', '+', '=']].each do |cols| 
    hbox :layout => [true, true] do 
     cols.each do |txt| 
      button txt, :set_size_request => [20, 20], :layout => [true, true] 
     end 
    end 
   end 
  end 
 end 
 
end 

 
MyWin.new.show_all 
Gtk.main 

Enjoy it :-)