class LCD():
# All avalaible colors
COLOR_RED = 0
COLOR_YELLOW = 1
COLOR_GREEN = 2
COLOR_TEAL = 3
COLOR_BLUE = 4
COLOR_VIOLET = 5
COLOR_ON = 6
COLOR_OFF = 7
def __init__(self):
self.__lcd = Adafruit_CharLCDPlate()
self.__buttons = (
self.__lcd.LEFT,
self.__lcd.UP,
self.__lcd.DOWN,
self.__lcd.RIGHT,
self.__lcd.SELECT,
)
self.__col = (
self.__lcd.RED,
self.__lcd.YELLOW,
self.__lcd.GREEN,
self.__lcd.TEAL,
self.__lcd.BLUE,
self.__lcd.VIOLET,
self.__lcd.ON,
self.__lcd.OFF
)
def stop(self):
self.change_color(7)
self.__lcd.clear()
def clear(self, clear_background):
if clear_background:
self.change_color(6)
self.__lcd.clear()
def change_color(self, index):
self.__lcd.backlight(self.__col[index])
def set_message(self, msg):
self.__lcd.message(msg)
def button_pressed(self, index):
return self.__lcd.buttonPressed(self.__buttons[index])
(times + ' ')[0:16])
else:
lcd.message(scroller.scroll()[0:16] + '\n' + \
(times + ' ')[0:16])
else:
lcd.message((playStatus + ' ')[0:16] + '\n' + \
(times + ' ')[0:16])
# Poll the buttons most of the sleep time, to make them responsive the plan is to
# poll the buttons for 400ms and then update the status on the display
# If we sleep for 40ms between each poll time and have five buttons that equals to 200 ms
# Two iterations of this gives us 400 ms.
# for i in range (0, 10):
for i in range (0, 5):
for b in btn:
if lcd.buttonPressed(b):
if isinstance(tmr, threading._Timer):
lcd.backlight(lcd.ON)
tmr.cancel()
tmr = None
if b is lcd.RIGHT:
subprocess.Popen('mpc next', shell=True)
sleep(0.2) # Sleep a little extra to avoid dubble registrations
if b is lcd.LEFT:
subprocess.Popen('mpc prev', shell=True)
sleep(0.2) # Sleep a little extra to avoid dubble registrations
if b is lcd.UP:
# subprocess.Popen('mpc play', shell=True)
subprocess.Popen('mpc volume +1', shell=True)
# sleep(0.2) # Sleep a little extra to avoid dubble registrations
(times + ' ')[0:16])
else:
lcd.message(scroller.scroll()[0:16] + '\n' + \
(times + ' ')[0:16])
else:
lcd.message((playStatus + ' ')[0:16] + '\n' + \
(times + ' ')[0:16])
# Poll the buttons most of the sleep time, to make them responsive the plan is to
# poll the buttons for 400ms and then update the status on the display
# If we sleep for 40ms between each poll time and have five buttons that equals to 200 ms
# Two iterations of this gives us 400 ms.
# for i in range (0, 10):
for i in range(0, 5):
for b in btn:
if lcd.buttonPressed(b):
if isinstance(tmr, threading._Timer):
lcd.backlight(lcd.ON)
tmr.cancel()
tmr = None
if b is lcd.RIGHT:
subprocess.Popen('mpc next', shell=True)
sleep(
0.2
) # Sleep a little extra to avoid dubble registrations
if b is lcd.LEFT:
subprocess.Popen('mpc prev', shell=True)
sleep(
0.2
) # Sleep a little extra to avoid dubble registrations
