This application creates a Music Album protected by a password. It offers facilities for adding tracks to an album (tracks  are by default read from c:\\music), this happens in the new_album()  function. Tracks from this list are added to a global album list  variable.
When the open() function is invoked the user is prompted to enter a  password, which must correspond to the global system_password value.  When access has been granted the user can view a list of files in the  album and choose to play anyone of the files in the album.
The set_password() function does as the name implies change the value  of the global system_password value.

###### Music album python script by
###### Morten Vejen Nielsen (mvejen@cs.aau.dk)
###### Jørn Martin Rasmussen (joern25@cs.aau.dk)
###### Nikolaj Andersen (nikko@cs.aau.dk)

######  import all modules needed
import appuifw
import e32
import os
import audio
import graphics

###### set the screen size (in this example, to large)
appuifw.app.screen='large'

from appuifw import *
from graphics import *

###### Passwords, default password set to 'password'
system_password = u"password"

#Path to store screenshots
sc_path = u'c:\\gfx\\'

#Global album value
album = []

###### Function for playing songs in the album list
def open():
	#Validate user password
	password = query(u"Enter password","code")
	if password == system_password:
		#Show album list
		choice = appuifw.selection_list(album, search_field=0)

		#Play selected song
		song = audio.Sound.open(album[choice])
		song.play()
	else:
		note("Wrong password supplied", "error")

###### Adds a song to our album
def addToAlbum(fileName):
	album.append(fileName)

###### Shows list of files that can be added to album
def new_album():
	appuifw.app.title = u"Add song to album"
	###### Open directory listing of z:\music and show results in menu
	path = u'c:\\music\\'
	files = map(unicode,os.listdir(path))

        #Create and show selectionList
        choice = appuifw.selection_list(files, search_field=0)

        #Add selected track to album
        fileName = path + files[choice]
        addToAlbum(fileName)

####### Changes the system password needed to play songs
def set_password():
	#Change global value holding system password
	globals()["system_password"] = query(u"Enter password","code")
	note(u"Password changed","info")

###### Show main menu
app.menu = [(u"Add to album", new_album),(u"Open", open),(u"Set Password", set_password)]

##### create and set an exit key handler
def exit_key_handler():
    app_lock.signal()
    appuifw.app.set_exit()

##### set the title
appuifw.app.title = u"Music Album"

##### 
app_lock = e32.Ao_lock()
appuifw.app.exit_key_handler = exit_key_handler
app_lock.wait()

musicalbum.py