# Tk_random_colors.py

# Tk_random_colors.py

from Tkinter import *
from random import randint

def color_to_hex(r,g,b):
        return '#%02x%02x%02x' % (r,g,b)

def random_color():
        r = randint(0,255)
        g = randint(0,255)
        b = randint(0,255)
        return color_to_hex(r,g,b)

def color_poll():
    global alarm
    #print
    c.itemconfig(r, fill=random_color())
    if keep_going:
        alarm = c.after(1000, color_poll)

def change_color():
    global keep_going, alarm
    if not keep_going:
        keep_going = True
        b['text']='STOP';b['fg']='red';b['relief']=SUNKEN
        color_poll()
    else:
        keep_going = False; c.after_cancel(alarm); alarm = None
        b['text']='GO';b['fg']='green';b['relief']=RAISED
def main(repetitions=2):
    hexagon = HexagonGenerator(40)
    image = create_canvas(hexagon.pattern_size, repetitions)
    draw = Draw(image)
    for row in range(hexagon.rows(image.size[1])):
        colors = [random_color() for _ in range(repetitions)]
        for column in range(repetitions + 1):
            color = colors[column % repetitions]
            draw.polygon(list(hexagon(row, column)), Brush(color))
    for column, color in enumerate(colors):
        draw.polygon(list(hexagon(-1, column)), Brush(color))
    draw.flush()
    image.show()

root = Tk()
c = Canvas(root)
c['width'] = 400; c['height'] = 400
r = c.create_rectangle(0,0,400,400)
global keep_going, alarm
keep_going = False; alarm = None
b = Button(root, command=change_color)
b['text'] = 'GO';b['fg']='green';b['font']='Arial 16';b['relief']=RAISED
c.pack(); b.pack(); root.mainloop()
color_poll()