def __init__(self):
self.lcdPanel = Adafruit_CharLCDPlate()
self.volumeString = "100%"
self.trackInfo = "No track is currently played"
self.state = ""
self.line1 = ""
self.line2 = ""
self.backColor = self.lcdPanel.BLUE
self.disco = False
self._recalculateLines()
self._startTickerThread()
class DisplayRenderer:
def __init__(self):
self.lcdPanel = Adafruit_CharLCDPlate()
self.volumeString = "100%"
self.trackInfo = "No track is currently played"
self.state = ""
self.line1 = ""
self.line2 = ""
self.backColor = self.lcdPanel.BLUE
self.disco = False
self._recalculateLines()
self._startTickerThread()
def _startTickerThread(self):
self.tickerStarted = True
start_new_thread(self._tickerLoop, ())
def _tickerLoop(self):
while self.tickerStarted:
time.sleep(0.5)
self.handleTimerTick()
def stopRenderer(self):
self.tickerStarted = False
self.disco = False
def setTrackInfo(self, trackinfo):
self.trackInfo = trackinfo
self.Invalidate()
def setVolume(self, volume):
self.volumeString = str(volume) + "%"
self.Invalidate()
def setState(self, state):
self.state = state
self.Invalidate()
def toggleDisco(self):
if self.disco == False:
self.disco = True
start_new_thread(self._discoLoop, ())
else:
self.disco = False
def _discoLoop(self):
while self.disco:
time.sleep(0.2)
self.backColor = random.randint(1, 7)
self.RenderDisplayTexts()
def Invalidate(self):
self._recalculateLines()
self.RenderDisplayTexts()
def handleTimerTick(self):
self.line1position = self._incPos(self.line1position, self.line1)
self.RenderDisplayTexts()
def _incPos(self, oldPosition, line):
if len(line) - oldPosition < 16:
return 0
else:
return oldPosition + 1
def _recalculateLines(self):
newline1 = self.trackInfo
n = 16 - len(self.state) - len(self.volumeString)
newline2 = self.state + (n * " ") + self.volumeString
if newline1 != self.line1:
self.line1position = 0
if newline2 != self.line2:
self.line2position = 0
self.line1 = newline1
self.line2 = newline2
def RenderDisplayTexts(self):
self.lcdPanel.clear()
logger.debug("Showing on line 1: " + self.line1)
logger.debug("Showing on line 2: " + self.line2)
self.lcdPanel.message(
self.line1[self.line1position:] + "\n" +
self.line2[self.line2position:])
self.lcdPanel.backlight(self.backColor)
