Code for IIPP Mini Project [Stopwatch]

Stopwatch.py

# "Stopwatch: The Game" created by Anirudh Jayaraman
# dated Wed Jun 17, 2015 12:18 PM IST 
import simplegui

# define global variables
canvas_width = 850; canvas_height = 300; button_size = 100
timer_interval = 100; current_time = 0; played = 0; won = 0
running = False
rules_first_line = "Number of successful stops at a whole second" 
rules_second_line = "versus the total number of stops"

# define helper function format that converts time
# in tenths of seconds into formatted string A:BC.D
def format(t):
    D = t % 10; C = (((t - t%10)/10)%60) % 10
    B = (((t - t%10)/10)%60) / 10; A = ((t - t%10)/10)/60
    return str(A) + ":" + str(B) + str(C) + "." + str(D)

# define event handlers for buttons
def start():
    global current_time, played, won, score, running
    timer.start(); running = True
    
def stop():
    global current_time, won, played, running
    t = current_time
    if running == True:
        timer.stop(); played += 1; running = False
        if t % 10 == 0: won += 1
       
def reset():
    global current_time, played, won, running; timer.stop()
    current_time = 0; played = 0; won = 0; running = False
    
# define event handler for timer with 0.1 sec interval
def timer_handler():
    global current_time; current_time +=1

# define draw handler
def draw(canvas):
    global score, current_time, rules
    score = str(won) + "/" + str(played)
    canvas.draw_text(format(current_time), [250,250], 150, "Aqua")
    canvas.draw_text(score, [700, 55], 55, "White")
    canvas.draw_text(rules_first_line, [20,30], 18, "White")
    canvas.draw_text(rules_second_line, [20,60], 18, "White")
    
# create frame
frame = simplegui.create_frame("Stopwatch", canvas_width, canvas_height)

# register event handlers
start_button = frame.add_button("Start", start, button_size)
stop_button = frame.add_button("Stop", stop, button_size)
reset_button = frame.add_button("Reset", reset, button_size)
frame.set_draw_handler(draw)
timer = simplegui.create_timer(timer_interval, timer_handler)

# start frame
frame.start()