# joystick control:

import struct

# define button code:

BUTTON_A = 305

BUTTON_B = 304

BUTTON_X = 307

BUTTON_Y = 306

BUTTON_PLUS = 313

BUTTON_MINUS = 312

BUTTON_START = 317

BUTTON_HOME = 316

class JoyStick():

def __init__(self, eventFile):

self.eventFile = eventFile

self.buttonHandler = None

self.joyLeftHandler = None

self.joyRightHandler = None

def setButtonHandler(self, buttonHandler):

self.buttonHandler = buttonHandler

def setJoyLeftHandler(self, joyLeftHandler):

self.joyLeftHandler = joyLeftHandler

def setJoyRightHandler(self, joyRightHandler):

self.joyRightHandler = joyRightHandler

def startLoop(self):

FORMAT = 'llHHI'

EVENT_SIZE = struct.calcsize(FORMAT)

with open(self.eventFile, 'rb') as infile:

lx, ly, rx, ry = 0, 0, 0, 0

while True:

event = infile.read(EVENT_SIZE)

_, _, t, c, v = struct.unpack(FORMAT, event)

if t == 1 and v == 1:

# button pressed:

if self.buttonHandler:

if not self.buttonHandler(c):

return

if t == 3:

if c == 0 and self.joyLeftHandler:

# left stick & horizontal:

lx = v - 32768

self.joyLeftHandler(lx, ly)

elif c == 1 and self.joyLeftHandler:

# left stick & vertical:

ly = v - 32768

self.joyLeftHandler(lx, ly)

elif c == 3 and self.joyRightHandler:

# right stick & horizontal:

rx = v - 32768

self.joyRightHandler(rx, ry)

elif c == 4 and self.joyRightHandler:

# right stick & vertical:

ry = v - 32768

self.joyRightHandler(rx, ry)