def __init__(self):
# setup display
self.lcd = Adafruit_CharLCDPlate()
self.lcd.begin(16, 2)
self.lcd.clear()
# init state
self.last_mask = 0
self.num_buttons = 5
self.last_repeat = []
self.first_flag = []
self.start_time = 0.5
self.repeat_time = 0.2
self.clear_line = " " * 16
self.last_value_len = 0
self.last_status_len = 0
self.last_msg_len = 0
self.last_back = self.BACK_OFF
for i in xrange(self.num_buttons):
self.last_repeat.append([0])
self.first_flag.append(True)
# map buttons
self.map = {
self.lcd.BUTTON_SELECT: self.EVENT_PICK,
self.lcd.BUTTON_RIGHT: self.EVENT_INC,
self.lcd.BUTTON_LEFT: self.EVENT_DEC,
self.lcd.BUTTON_DOWN: self.EVENT_NEXT,
self.lcd.BUTTON_UP: self.EVENT_PREV
}
# map background
self.map_back = {
self.BACK_OFF: self.lcd.OFF,
self.BACK_WHITE: self.lcd.WHITE,
self.BACK_RED: self.lcd.RED,
self.BACK_GREEN: self.lcd.GREEN,
self.BACK_BLUE: self.lcd.BLUE,
self.BACK_YELLOW: self.lcd.YELLOW,
self.BACK_TEAL: self.lcd.TEAL,
self.BACK_VIOLET: self.lcd.VIOLET
}
def __init__(self):
# setup display
self.lcd = Adafruit_CharLCDPlate()
self.lcd.begin(16, 2)
self.lcd.clear()
# init state
self.last_mask = 0
self.num_buttons = 5
self.last_repeat = []
self.first_flag = []
self.start_time = 0.5
self.repeat_time = 0.2
self.clear_line = " " * 16
self.last_value_len = 0
self.last_status_len = 0
self.last_msg_len = 0
self.last_back = self.BACK_OFF
for i in xrange(self.num_buttons):
self.last_repeat.append([0])
self.first_flag.append(True)
# map buttons
self.map = {
self.lcd.BUTTON_SELECT : self.EVENT_PICK,
self.lcd.BUTTON_RIGHT : self.EVENT_INC,
self.lcd.BUTTON_LEFT : self.EVENT_DEC,
self.lcd.BUTTON_DOWN : self.EVENT_NEXT,
self.lcd.BUTTON_UP : self.EVENT_PREV
}
# map background
self.map_back = {
self.BACK_OFF : self.lcd.OFF,
self.BACK_WHITE : self.lcd.WHITE,
self.BACK_RED : self.lcd.RED,
self.BACK_GREEN : self.lcd.GREEN,
self.BACK_BLUE : self.lcd.BLUE,
self.BACK_YELLOW : self.lcd.YELLOW,
self.BACK_TEAL : self.lcd.TEAL,
self.BACK_VIOLET : self.lcd.VIOLET
}
class LCDUI(UI):
def __init__(self):
# setup display
self.lcd = Adafruit_CharLCDPlate()
self.lcd.begin(16, 2)
self.lcd.clear()
# init state
self.last_mask = 0
self.num_buttons = 5
self.last_repeat = []
self.first_flag = []
self.start_time = 0.5
self.repeat_time = 0.2
self.clear_line = " " * 16
self.last_value_len = 0
self.last_status_len = 0
self.last_msg_len = 0
self.last_back = self.BACK_OFF
for i in xrange(self.num_buttons):
self.last_repeat.append([0])
self.first_flag.append(True)
# map buttons
self.map = {
self.lcd.BUTTON_SELECT: self.EVENT_PICK,
self.lcd.BUTTON_RIGHT: self.EVENT_INC,
self.lcd.BUTTON_LEFT: self.EVENT_DEC,
self.lcd.BUTTON_DOWN: self.EVENT_NEXT,
self.lcd.BUTTON_UP: self.EVENT_PREV
}
# map background
self.map_back = {
self.BACK_OFF: self.lcd.OFF,
self.BACK_WHITE: self.lcd.WHITE,
self.BACK_RED: self.lcd.RED,
self.BACK_GREEN: self.lcd.GREEN,
self.BACK_BLUE: self.lcd.BLUE,
self.BACK_YELLOW: self.lcd.YELLOW,
self.BACK_TEAL: self.lcd.TEAL,
self.BACK_VIOLET: self.lcd.VIOLET
}
def shutdown(self):
self.lcd.clear()
self.lcd.noDisplay()
self.lcd.backlight(self.lcd.OFF)
def update_background(self, back):
"""update background"""
if back != self.last_back:
self.last_back = back
mapped_back = self.map_back[back]
self.lcd.backlight(mapped_back)
def show_menu(self, title):
"""start showing a menu"""
# limit to 8 chars
t = (title + " " * 8)[:8]
t += " " * 8
self.last_value_len = 0
self.lcd.setCursor(0, 1)
self.lcd.message(t)
def hide_menu(self):
self.show_menu("")
def _update_value(self, value, last_len, size, pad_right=False):
"""update value and return (txt, pos, new_last_len)"""
t = str(value)
n = len(t)
# limit to n chars
if n > size:
t = t[:size]
n = size
# overwrite last value
if n < last_len:
d = last_len - n
if pad_right:
t = t + (" " * d)
else:
t = (" " * d) + t
pos = size - len(t)
return (t, pos, n)
def update_menu_value(self, value):
"""update a value change in the menu"""
(txt, pos,
self.last_value_len) = self._update_value(value, self.last_value_len,
4)
self.lcd.setCursor(pos + 12, 1)
self.lcd.message(txt)
def update_title(self, title):
"""update the title message"""
self.lcd.setCursor(0, 0)
self.lcd.message(title)
def update_status(self, status):
"""update the status bar"""
(txt, pos,
self.last_status_len) = self._update_value(status,
self.last_status_len, 10)
self.lcd.setCursor(pos + 6, 0)
self.lcd.message(txt)
def show_message(self, msg):
"""if no menu is shown then you can show a message"""
self.last_msg_len = 16
self.update_message(msg)
def update_message(self, msg):
(txt, pos,
self.last_msg_len) = self._update_value(msg, self.last_msg_len, 16,
True)
self.lcd.setCursor(0, 1)
self.lcd.message(txt)
def hide_message(self):
"""if a message is shown then hide it"""
self.update_message("")
def get_next_event(self):
"""return the next button event or 0 if no event occurred"""
# check for new press
mask = self.lcd.buttonRead()
changes = (self.last_mask ^ mask) & mask
self.last_mask = mask
# any button newly pressed
ts = time.time()
result = 0
if changes != 0:
for i in xrange(self.num_buttons):
if changes & (1 << i) != 0:
# store begin of press
self.last_repeat[i] = ts
self.first_flag[i] = True
result = mask
elif mask != 0:
# check for auto-repeat
for i in xrange(self.num_buttons):
if mask & (1 << i) != 0:
delta = ts - self.last_repeat[i]
flag = self.first_flag[i]
# first repeat
if flag:
if delta > self.start_time:
result |= 1 << i
self.last_repeat[i] = ts
self.first_flag[i] = False
# continious repeat
else:
if delta > self.repeat_time:
result |= 1 << i
self.last_repeat[i] = ts
if result == 0:
return 0
else:
# map button
mapped_result = 0
for e in self.map:
if result & e == e:
mapped_result |= self.map[e]
return mapped_result
class LCDUI(UI):
def __init__(self):
# setup display
self.lcd = Adafruit_CharLCDPlate()
self.lcd.begin(16, 2)
self.lcd.clear()
# init state
self.last_mask = 0
self.num_buttons = 5
self.last_repeat = []
self.first_flag = []
self.start_time = 0.5
self.repeat_time = 0.2
self.clear_line = " " * 16
self.last_value_len = 0
self.last_status_len = 0
self.last_msg_len = 0
self.last_back = self.BACK_OFF
for i in xrange(self.num_buttons):
self.last_repeat.append([0])
self.first_flag.append(True)
# map buttons
self.map = {
self.lcd.BUTTON_SELECT : self.EVENT_PICK,
self.lcd.BUTTON_RIGHT : self.EVENT_INC,
self.lcd.BUTTON_LEFT : self.EVENT_DEC,
self.lcd.BUTTON_DOWN : self.EVENT_NEXT,
self.lcd.BUTTON_UP : self.EVENT_PREV
}
# map background
self.map_back = {
self.BACK_OFF : self.lcd.OFF,
self.BACK_WHITE : self.lcd.WHITE,
self.BACK_RED : self.lcd.RED,
self.BACK_GREEN : self.lcd.GREEN,
self.BACK_BLUE : self.lcd.BLUE,
self.BACK_YELLOW : self.lcd.YELLOW,
self.BACK_TEAL : self.lcd.TEAL,
self.BACK_VIOLET : self.lcd.VIOLET
}
def shutdown(self):
self.lcd.clear()
self.lcd.noDisplay()
self.lcd.backlight(self.lcd.OFF)
def update_background(self, back):
"""update background"""
if back != self.last_back:
self.last_back = back
mapped_back = self.map_back[back]
self.lcd.backlight(mapped_back)
def show_menu(self, title):
"""start showing a menu"""
# limit to 8 chars
t = (title + " " * 8)[:8]
t += " " * 8
self.last_value_len = 0
self.lcd.setCursor(0,1)
self.lcd.message(t)
def hide_menu(self):
self.show_menu("")
def _update_value(self, value, last_len, size, pad_right=False):
"""update value and return (txt, pos, new_last_len)"""
t = str(value)
n = len(t)
# limit to n chars
if n > size:
t = t[:size]
n = size
# overwrite last value
if n < last_len:
d = last_len - n
if pad_right:
t = t + (" " * d)
else:
t = (" " * d) + t
pos = size - len(t)
return (t, pos, n)
def update_menu_value(self, value):
"""update a value change in the menu"""
(txt, pos, self.last_value_len) = self._update_value(value, self.last_value_len, 4)
self.lcd.setCursor(pos + 12,1)
self.lcd.message(txt)
def update_title(self, title):
"""update the title message"""
self.lcd.setCursor(0,0)
self.lcd.message(title)
def update_status(self, status):
"""update the status bar"""
(txt, pos, self.last_status_len) = self._update_value(status, self.last_status_len, 10)
self.lcd.setCursor(pos + 6,0)
self.lcd.message(txt)
def show_message(self, msg):
"""if no menu is shown then you can show a message"""
self.last_msg_len = 16
self.update_message(msg)
def update_message(self, msg):
(txt, pos, self.last_msg_len) = self._update_value(msg, self.last_msg_len, 16, True)
self.lcd.setCursor(0,1)
self.lcd.message(txt)
def hide_message(self):
"""if a message is shown then hide it"""
self.update_message("")
def get_next_event(self):
"""return the next button event or 0 if no event occurred"""
# check for new press
mask = self.lcd.buttonRead()
changes = (self.last_mask ^ mask) & mask
self.last_mask = mask
# any button newly pressed
ts = time.time()
result = 0
if changes != 0:
for i in xrange(self.num_buttons):
if changes & (1<<i) != 0:
# store begin of press
self.last_repeat[i] = ts
self.first_flag[i] = True
result = mask
elif mask != 0:
# check for auto-repeat
for i in xrange(self.num_buttons):
if mask & (1<<i) != 0:
delta = ts - self.last_repeat[i]
flag = self.first_flag[i]
# first repeat
if flag:
if delta > self.start_time:
result |= 1<<i
self.last_repeat[i] = ts
self.first_flag[i] = False
# continious repeat
else:
if delta > self.repeat_time:
result |= 1<<i
self.last_repeat[i] = ts
if result == 0:
return 0
else:
# map button
mapped_result = 0
for e in self.map:
if result & e == e:
mapped_result |= self.map[e]
return mapped_result