from Tkinter import *

# some vocabulary to keep from getting confused. This terminology 
# is something I cooked up for this file, but follows the man pages 
# pretty closely
# 
# 
# 
#       This is a MENUBUTTON
#       V
# +-------------+
# |             |
# 
# +------------++------------++------------+
# |            ||            ||            |
# |  File      ||  Edit      || Options    |   <-------- the MENUBAR
# |            ||            ||            |
# +------------++------------++------------+
# | New...         |
# | Open...        |
# | Print          |
# |                |  <-------- This is a MENU. The lines of text in the menu are
# |                |                            MENU ENTRIES
# |                +---------------+
# | Open Files >   | file1         |               
# |                | file2         |
# |                | another file  | <------ this cascading part is also a MENU
# +----------------|               |
#                  |               |
#                  |               |
#                  |               |
#                  +---------------+



def new_file():
    print "opening new file"


def open_file():
    print "opening OLD file"


def makeFileMenu():
    # make menu button : "File"
    File_button = Menubutton(mBar, {'text': 'File', 
				    'underline': 0,
				    Pack: {'side': 'left', 
					   'padx': '1m'}})
    
    # make the pulldown part of the File menu. The parameter passed is the master.
    # we attach it to the File button as a python attribute called "menu" by convention.
    # hopefully this isn't too confusing...
    File_button.menu = Menu(File_button)
    
    # add an item. The first param is a menu entry type, 
    # must be one of: "cascade", "checkbutton", "command", "radiobutton", "seperator"
    # see menu-demo-2.py for examples of use
    File_button.menu.add('command', {'label': 'New...', 
				     'underline': 0, 
				     'command' : new_file})
    
    
    File_button.menu.add('command', {'label': 'Open...', 
				     'underline': 0, 
				     'command' : open_file})
    
    File_button.menu.add('command', {'label': 'Quit', 
				     'underline': 0, 
				     'command': 'exit'})
    
    
    # set up a pointer from the file menubutton back to the file menu
    File_button['menu'] = File_button.menu

    return File_button



def makeEditMenu():
    Edit_button = Menubutton(mBar, {'text': 'Edit', 
				    'underline': 0,
				    Pack: {'side': 'left', 
					   'padx' : '1m'}})
    Edit_button.menu = Menu(Edit_button)

    # just to be cute, let's disable the undo option:
    Edit_button.menu.add('command', {"label" : "Undo"} )
    # undo is the 0th entry...
    Edit_button.menu.entryconfig(0, {"state" : "disabled"})

    # and these are just for show. No "command" callbacks attached.
    Edit_button.menu.add('command', {"label" : "Cut"} )
    Edit_button.menu.add('command', {"label" : "Copy"} )
    Edit_button.menu.add('command', {"label" : "Paste"} )
					
    # set up a pointer from the file menubutton back to the file menu
    Edit_button['menu'] = Edit_button.menu

    return Edit_button


#################################################

#### Main starts here ...
root = Tk()


# make a menu bar
mBar = Frame(root, {'relief': 'raised', 
		    'bd': 2,
		    Pack: {'side': 'top', 
			   'fill': 'x'}})

File_button = makeFileMenu()
Edit_button = makeEditMenu()

# finally, install the buttons in the menu bar. 
# This allows for scanning from one menubutton to the next.
mBar.tk_menuBar(File_button, Edit_button)


root.title('menu demo')
root.iconname('packer')

root.mainloop()