# https://artofproblemsolving.com/assets/pythonbook/events.html

import turtle

turtle.setup(500,500)                # Determine the window size
wn = turtle.Screen()                 # Get a reference to the window
wn.title("Handling Events")          # Change the window title
wn.bgcolor("lightgreen")             # Set the background color
tess = turtle.Turtle()               # Create our favorite turtle

# The next five functions are our "event handlers".
def go_straight():
    tess.forward(30)

def turn_left():
    tess.left(45)

def turn_right():
    tess.right(45)

def come_here(x, y):
    tess.goto(x, y)

def quit():
    wn.bye()                        # Close down the turtle window

# These lines "wire up" keypresses to the handlers we've defined.
wn.onkey(go_straight, " ")
wn.onkey(turn_left, "Left")
wn.onkey(turn_right, "Right")
wn.onkey(quit, "q")

# Wire up a click on the window.
wn.onclick(come_here)

# Now we need to tell the window to start listening for events,
# If any of the keys that we're monitoring is pressed, its
# handler will be called.
wn.listen()
wn.mainloop()