#!/usr/bin/env python

#------------------------------------------------------------------------------

from Tkinter import Tk, Canvas
import Image, ImageTk, ImageDraw
from random import choice, randint

#------------------------------------------------------------------------------

COLORI = "white", "red", "green", "blue", "yellow", "cyan", "magenta"
WSC, HSC = 500, 400
   
#------------------------------------------------------------------------------
    
def elabora(dr):
    dr.rectangle((0, 0, WSC, HSC), "black")
    for _ in xrange(25):
        x = randint(0, WSC)
        y = randint(0, HSC)
        dr.line((0, 0, x, y),     fill=choice(COLORI))
        dr.line((WSC, HSC, x, y), fill=choice(COLORI))
        dr.line((WSC, 0, x, y),   fill=choice(COLORI))
        dr.line((0, HSC, x, y),   fill=choice(COLORI))

#------------------------------------------------------------------------------

class Applicazione:

    def __init__ (self):
        self.form1 = Tk()
        self.form1.title("Prova PIL")
        self.form1.resizable(False, False)
        self.canvas1 = Canvas(
            self.form1, highlightthickness=0, width=WSC, height=HSC)
        self.canvas1.pack()
        self.img = Image.new("RGB", (WSC, HSC), "black")
        self.dr = ImageDraw.Draw(self.img)
        self.im = ImageTk.PhotoImage(self.img)
        self.z = self.canvas1.create_image(0, 0, image=self.im, anchor="nw")


    def animazione(self):
        self.form1.after(100, self.animazione)
        elabora(self.dr)
        self.im = ImageTk.PhotoImage(self.img)
        self.canvas1.itemconfigure(self.z, image=self.im)

        
    def start(self):
        self.animazione()
        self.form1.mainloop()

#------------------------------------------------------------------------------

app = Applicazione()
app.start()

#img.save("pippo.gif")
#img.save("pippo.png")