Coursera IIPP Mini-project number 4

IIPP_Proj_4.py

import simplegui

my_number = int(0)
n_stops = int(0)
n_stops_on_zero = int(0)
is_running = False

def timer_handler():
    global my_number
    my_number += 1
    print my_number
    
def draw_handler(canvas):
    canvas.draw_text(format(my_number), (20, 20), 20, 'White')
    canvas.draw_text(str(n_stops_on_zero) + '/' + str(n_stops), (100, 20), 20, 'White')
    
def start_handler():
    global is_running
    is_running = True
    timer.start()
    
def stop_handler():
    global n_stops
    global is_running
    if is_running:
        n_stops += 1
        timer.stop()
        is_running = False
        if my_number % 10 == 0:
            global n_stops_on_zero
            n_stops_on_zero += 1
    
    
def reset_handler():
    global my_number
    global n_stops
    global n_stops_on_zero
    my_number = 0
    n_stops = int(0)
    n_stops_on_zero = int(0)


def format(t):
    """From t tenths of a second, return time in 0:00.0 format as a string"""
    A, B, C, D = 0, 0, 0, 0
    t = t / 10.0			# Puts t into seconds, not tenths
    if t > 59:				# Figure the minutes
        A = int(t // 60)
        t = t - (A * 60)	# Subtract, now t is in seconds
    t = str(t)				# Change t to a string
    t = t.replace('.', '')	# And get rid of the decimal in it
    l = len(t)
    D = t[l-1]				# The last element in t is the tenths
    C = t[l - 2]			# Second to last is the ones
    if l == 3:				# And third to last, if it exists, is the tens
        B = t[l - 3]
    return str(A) + ':' + str(B) + str(C) + '.' + str(int(D))
  
timer = simplegui.create_timer(100, timer_handler)
frame = simplegui.create_frame('Stopwatch', 150, 150)
start_button = frame.add_button('Start', start_handler)
stop_button = frame.add_button('Stop', stop_handler)
reset_button = frame.add_button('Reset', reset_handler)


frame.set_draw_handler(draw_handler)
frame.start()