#!/usr/bin/env python

# example menu.py

import pygtk
pygtk.require('2.0')
import gtk

class MenuExample:
    def __init__(self):
         # create a new window
        window = gtk.Window(gtk.WINDOW_TOPLEVEL)
        window.set_size_request(200, 100)
        window.set_title("GTK Menu Test")
        window.connect("delete_event", lambda w,e: gtk.main_quit())

        # Init the menu-widget, and remember -- never
        # show() the menu widget!!
        # This is the menu that holds the menu items, the one that
        # will pop up when you click on the "Root Menu" in the app
        menu = gtk.Menu()

        # Next we make a little loop that makes three menu-entries for
        # "test-menu". Notice the call to gtk_menu_append. Here we are
        # adding a list of menu items to our menu. Normally, we’d also
        # catch the "clicked" signal on each of the menu items and setup a
        # callback for it, but it’s omitted here to save space.
        for i in range(3):
            # Copy the names to the buf.
            buf = "Test-undermenu - %d" % i

            # Create a new menu-item with a name...
            menu_items = gtk.MenuItem(buf)

            # ...and add it to the menu.
            menu.append(menu_items)

            # Do something interesting when the menuitem is selected
            menu_items.connect("activate", self.menuitem_response, buf)

            # Show the widget
            menu_items.show()

        # This is the root menu, and will be the label
        # displayed on the menu bar. There won’t be a signal handler attached,
        # as it only pops up the rest of the menu when pressed.
        root_menu = gtk.MenuItem("Root Menu")

        root_menu.show()

        # Now we specify that we want our newly created "menu" to be the
        # show() the menu widget!!
        # This is the menu that holds the menu items, the one that
        # will pop up when you click on the "Root Menu" in the app
        menu = gtk.Menu()

        # Next we make a little loop that makes three menu-entries for
        # "test-menu". Notice the call to gtk_menu_append. Here we are
        # adding a list of menu items to our menu. Normally, we’d also
        # catch the "clicked" signal on each of the menu items and setup a
        # callback for it, but it’s omitted here to save space.
        for i in range(3):
            # Copy the names to the buf.
            buf = "Test-undermenu - %d" % i

            # Create a new menu-item with a name...
            menu_items = gtk.MenuItem(buf)

            # ...and add it to the menu.
            menu.append(menu_items)

            # Do something interesting when the menuitem is selected
            menu_items.connect("activate", self.menuitem_response, buf)

            # Show the widget
            menu_items.show()

            # This is the root menu, and will be the label
            # displayed on the menu bar. There won’t be a signal handler attached,
            # as it only pops up the rest of the menu when pressed.
        root_menu = gtk.MenuItem("Root Menu")
        root_menu.show()

# menu for the "root menu"
        root_menu.set_submenu(menu)
        
        # A vbox to put a menu and a button in:
        vbox = gtk.VBox(False, 0)
        window.add(vbox)
        vbox.show()
        
        # Create a menu-bar to hold the menus and add it to our main window
        menu_bar = gtk.MenuBar()
        vbox.pack_start(menu_bar, False, False, 2)
        menu_bar.show()
        
        # Create a button to which to attach menu as a popup
        button = gtk.Button("press me")
        button.connect_object("event", self.button_press, menu)
        vbox.pack_end(button, True, True, 2)
        button.show()
    
        # And finally we append the menu-item to the menu-bar -- this is th         
    
                # Now we specify that we want our newly created "menu" to be the
                # "root" menu-item I have been raving about =)
        menu_bar.append (root_menu)
    
            # always display the window as the last step so it all splashes on
            # the screen at once.
        window.show()

     # Respond to a button-press by posting a menu passed in as widget.
     #
     # Note that the "widget" argument is the menu being posted, NOT
     # the button that was pressed.
    def button_press(self, widget, event):
        if event.type == gtk.gdk.BUTTON_PRESS:
            widget.popup(None, None, None, event.button, event.time)
        # Tell calling code that we have handled this event the buck
        # stops here.
            return True
        # Tell calling code that we have not handled this event pass it on.
        return False

     # Print a string when a menu item is selected
    def menuitem_response(self, widget, string):
        print "%s" % string

def main():
    gtk.main()
    return 0

if __name__ == "__main__":
    MenuExample()
    main()

  

?file_menu = gtk.Menu()

將file_item做為子菜單加入到file_menu

file_item.set_submenu(file_menu)
在menubar中加入菜單項

menu_bar.append(child)

比如：
menu_bar.append(file_item)

在menubar中右調整，比如help菜單等，我們使用下面的方法：

menu_item.set_right_justified(right_justified)
=========================
1.使用gtk.Menu()創建新的menu

2.gtk.MenuItem() 創建子菜單項，然后使用append()

3. set_submenu() 將子菜單項加入menu中

4.使用gtk.MenuBar()創建menubar

5.append()加入菜單項

6.設置事件

widget.connect_object("event", handler, menu)

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pygtk-menu