class Scroller:
def __init__(self):
random.seed()
self.width = 40
self.height = 2
self.timeoutmin = 20
self.timeoutmax = 100
self.wait_time = 40
self.separator = ' +++ '
self.paused = False
self.paused_loop = 0
self.busy = False
self.busy_loop = 0
self.elapsed = ''
self.lines = []
self.offset = []
self.tag = []
for i in range(self.height):
self.lines.append('')
self.offset.append(0)
self.tag.append('')
self.ascii_art = {}
self.load_ascii_art()
# 0 - animation running
# > 0 - animation countdown
# -1 - animation and countdown disabled
self.easter_egg_countdown = -1
self.animation_index = self.ascii_art.keys()[random.randrange(0, len(self.ascii_art))]
self.animation_phase = 0
self.lcd = Adafruit_CharLCD()
self.lcd.begin(40, 2)
self.lcd.define_char(1, [0, 0x10, 0x08, 0x04, 0x02, 0x01, 0, 0])
self.lcd.define_char(2, [0, 31, 14, 4, 21, 10, 0, 0])
self.current_lines = ["", ""]
def tr(self, s):
result = ''.encode('latin-1')
for c in unicode(s, 'UTF-8'):
#print(c, ord(c))
if ord(c) == 92:
result += u'\x01'.encode('latin-1')
elif ord(c) < 128:
result += c.encode('latin-1')
elif ord(c) == 246:
result += u'\xef'.encode('latin-1')
elif ord(c) == 252:
result += u'\xf5'.encode('latin-1')
elif ord(c) == 228:
result += u'\xe1'.encode('latin-1')
elif ord(c) == 223:
result += u'\xe2'.encode('latin-1')
elif ord(c) == 169:
result += '(c)'.encode('latin-1')
else:
pass
#print(c)
#print(ord(c))
return result
def load_ascii_art(self):
with open('ascii-art.txt') as f:
while True:
tag = f.readline().strip()
if len(tag) == 0:
break
self.ascii_art[tag] = []
while True:
line1 = f.readline().rstrip()
if len(line1) == 0:
break
line2 = f.readline().rstrip()
line1 = self.tr(line1)
line2 = self.tr(line2)
if len(line1) > len(line2):
line2 += ' ' * (len(line1) - len(line2))
if len(line2) > len(line1):
line1 += ' ' * (len(line2) - len(line1))
self.ascii_art[tag].append(line1)
self.ascii_art[tag].append(line2)
def set_line(self, i, s = '', tag = ''):
if s == None:
s = ''
if tag == self.tag[i]:
if self.offset[i] > 0:
return
s = self.tr(s)
if s != self.lines[i]:
self.lines[i] = s
self.offset[i] = -self.wait_time
self.tag[i] = tag
if self.lines[0] == '' and self.lines[1] == '':
if self.easter_egg_countdown < 0:
self.easter_egg_countdown = random.randrange(self.timeoutmin, self.timeoutmax)
self.animation_index = self.ascii_art.keys()[random.randrange(0, len(self.ascii_art))]
self.animation_phase = 0
else:
self.easter_egg_countdown = -1
def set_paused(self, paused):
self.paused = paused
def set_busy(self, busy):
self.busy = busy
def set_elapsed(self, elapsed):
self.elapsed = elapsed
def render(self):
result_lines = []
if self.easter_egg_countdown > 0:
self.easter_egg_countdown -= 1
if self.easter_egg_countdown == 0:
# animation
for i in range(2):
offset = -len(self.ascii_art[self.animation_index][i]) + self.animation_phase
frames = len(self.ascii_art[self.animation_index]) / 2
part = self.ascii_art[self.animation_index][i + (2 * (self.animation_phase % frames))]
if offset < 0:
part = part[-offset:]
else:
part = (' ' * offset) + part
part += ' ' * self.width
part = part[:self.width]
result_lines.append(part)
if (offset > self.width):
self.easter_egg_countdown = random.randrange(self.timeoutmin, self.timeoutmax)
self.animation_index = self.ascii_art.keys()[random.randrange(0, len(self.ascii_art))]
self.animation_phase = 0
self.animation_phase = self.animation_phase + 1
else:
# print lines
for i in range(self.height):
line = self.lines[i]
cropped = line
if len(line) > self.width:
cropped += self.separator
cropped += line
offset = self.offset[i]
if offset < 0:
offset = 0
cropped += ' ' * self.width
cropped = cropped[offset:(offset + self.width)]
if i == 0:
if self.busy:
cropped = cropped[:-2]
self.busy_loop = (self.busy_loop + 1) % 4
cropped += ' '
cropped += ('/-' + u'\x01'.encode('latin-1') + '|')[self.busy_loop]
if i == 1:
if self.paused:
cropped = cropped[:-2]
self.paused_loop = (self.paused_loop + 1) % 4
cropped += ' '
cropped += '.oOo'[self.paused_loop]
#else:
#if self.elapsed != '':
#cropped = cropped[:-(len(self.elapsed) + 2)]
#cropped += "|%s" % self.elapsed
if i == 0:
cropped = cropped[:-2]
cropped += ' '
cropped += '"'
if i == 1:
cropped = cropped[:-2]
cropped += ' '
cropped += u'\x02'.encode('latin-1')
result_lines.append(cropped)
#os.system("clear")
#self.lcd.clear()
self.lcd.setCursor(0, 0)
for index, cropped in enumerate(result_lines):
#if cropped != self.current_lines[index]:
self.current_lines[index] = cropped
self.lcd.message(cropped)
#print(cropped)
#print(cropped)
#print()
def animate(self):
for i in range(self.height):
line = self.lines[i]
if len(line) <= self.width:
self.offset[i] = 0
else:
self.offset[i] += 1
if self.offset[i] == len(line) + len(self.separator):
self.offset[i] = -self.wait_time
def clear(self):
for i in range(self.height):
self.set_line(i, '')
