class MyMeter(Meter):
def __init__(self, x, text):
CWriter.set_textpos(ssd, 0,
0) # In case previous tests have altered it
wri = CWriter(ssd, arial10, GREEN, BLACK, verbose=False)
wri.set_clip(True, True, False)
super().__init__(wri,
5,
x,
divisions=4,
ptcolor=YELLOW,
label=text,
style=Meter.BAR,
legends=('0.0', '0.5', '1.0'))
self.led = LED(wri,
ssd.height - 16 - wri.height,
x,
bdcolor=YELLOW,
label='over')
self.task = asyncio.create_task(self._run())
async def _run(self):
while True:
v = int.from_bytes(uos.urandom(3), 'little') / 16777216
self.value(v, color(v))
self.led.color(color(v))
self.led.text(txt(v), fgcolor=color(v))
# Slow asynchronous data acquisition might occur here. Note
# that meters update themselves asynchronously (in a real
# application as data becomes available).
await asyncio.sleep(v) # Demo variable times
def meter():
print('meter')
refresh(ssd, True) # Clear any prior image
m = Meter(wri, 5, 2, height = 45, divisions = 4, ptcolor=YELLOW,
label='level', style=Meter.BAR, legends=('0.0', '0.5', '1.0'))
l = LED(wri, 5, 40, bdcolor=YELLOW, label ='over')
steps = 10
for _ in range(steps):
v = int.from_bytes(uos.urandom(3),'little')/16777216
m.value(v)
l.color(GREEN if v < 0.5 else RED)
refresh(ssd)
utime.sleep(1)
refresh(ssd)
def __init__(self):
super().__init__()
labels = {
'width': 50,
'fontcolor': WHITE,
'border': 2,
'fgcolor': RED,
'bgcolor': DARKGREEN,
'font': font10,
}
quitbutton()
self.meter = Meter((129, 0),
font=font6,
legends=('0', '5', '10'),
pointercolor=YELLOW,
fgcolor=CYAN)
self.lbl_result = Label((25, 80), **labels)
self.led = LED((0, 80), border=2)
self.master = HorizSlider((0, 16),
font=font6,
fgcolor=YELLOW,
fontcolor=WHITE,
legends=('0', '5', '10'),
cb_end=self.callback,
cbe_args=('Master', ),
cb_move=self.master_moved,
value=0.5,
border=2)
self.slave = HorizSlider((0, 44),
fgcolor=GREEN,
cbe_args=('Slave', ),
cb_move=self.slave_moved,
border=2)
self.reg_task(self.coro())
# On/Off toggle: enable/disable quit button and one slider
bs = ButtonList(self.cb_en_dis)
lst_en_dis = [self.slave, self.master]
button = bs.add_button((0, 107),
font=font10,
fontcolor=BLACK,
fgcolor=GREEN,
text='Dis',
args=[True, lst_en_dis])
button = bs.add_button((0, 107),
font=font10,
fontcolor=BLACK,
fgcolor=RED,
text='En',
args=[False, lst_en_dis])
def __init__(self, x, text):
CWriter.set_textpos(ssd, 0,
0) # In case previous tests have altered it
wri = CWriter(ssd, arial10, GREEN, BLACK, verbose=False)
wri.set_clip(True, True, False)
super().__init__(wri,
5,
x,
divisions=4,
ptcolor=YELLOW,
label=text,
style=Meter.BAR,
legends=('0.0', '0.5', '1.0'))
self.led = LED(wri,
ssd.height - 16 - wri.height,
x,
bdcolor=YELLOW,
label='over')
self.task = asyncio.create_task(self._run())
async def meter(n, x, text, t):
print('Meter {} test.'.format(n))
m = Meter(wri, 5, x, divisions = 4, ptcolor=YELLOW,
label=text, style=Meter.BAR, legends=('0.0', '0.5', '1.0'))
l = LED(wri, ssd.height - 16 - wri.height, x, bdcolor=YELLOW, label ='over')
while True:
v = int.from_bytes(uos.urandom(3),'little')/16777216
m.value(v, color(v))
l.color(color(v))
l.text(txt(v), fgcolor=color(v))
refresh(ssd)
await asyncio.sleep_ms(t)
class SliderScreen(Screen):
def __init__(self):
super().__init__()
labels = {
'width': 50,
'fontcolor': WHITE,
'border': 2,
'fgcolor': RED,
'bgcolor': DARKGREEN,
'font': font10,
}
quitbutton()
self.meter = Meter((129, 0),
font=font6,
legends=('0', '5', '10'),
pointercolor=YELLOW,
fgcolor=CYAN)
self.lbl_result = Label((25, 80), **labels)
self.led = LED((0, 80), border=2)
self.master = HorizSlider((0, 16),
font=font6,
fgcolor=YELLOW,
fontcolor=WHITE,
legends=('0', '5', '10'),
cb_end=self.callback,
cbe_args=('Master', ),
cb_move=self.master_moved,
value=0.5,
border=2)
self.slave = HorizSlider((0, 44),
fgcolor=GREEN,
cbe_args=('Slave', ),
cb_move=self.slave_moved,
border=2)
self.reg_task(self.coro())
# On/Off toggle: enable/disable quit button and one slider
bs = ButtonList(self.cb_en_dis)
lst_en_dis = [self.slave, self.master]
button = bs.add_button((0, 107),
font=font10,
fontcolor=BLACK,
fgcolor=GREEN,
text='Dis',
args=[True, lst_en_dis])
button = bs.add_button((0, 107),
font=font10,
fontcolor=BLACK,
fgcolor=RED,
text='En',
args=[False, lst_en_dis])
# CALLBACKS
# cb_end occurs when user stops touching the control
def callback(self, slider, device):
print('{} returned {}'.format(device, slider.value()))
def master_moved(self, slider):
val = slider.value()
self.led.value(val > 0.8)
self.slave.value(val)
self.lbl_result.value(to_string(val))
def cb_en_dis(self, button, disable, itemlist):
for item in itemlist:
item.greyed_out(disable)
# Either slave has had its slider moved (by user or by having value altered)
def slave_moved(self, slider):
val = slider.value()
if val > 0.8:
slider.color(RED)
else:
slider.color(GREEN)
self.lbl_result.value(to_string(val))
# COROUTINE
async def coro(self):
oldvalue = 0
await asyncio.sleep(0)
while True:
val = int.from_bytes(os.urandom(1), 1) / 255
steps = 20
delta = (val - oldvalue) / steps
for _ in range(steps):
oldvalue += delta
self.meter.value(oldvalue)
await asyncio.sleep_ms(100)
def meter():
print('Meter test.')
refresh(ssd, True) # Clear any prior image
color = lambda v: RED if v > 0.7 else YELLOW if v > 0.5 else GREEN
txt = lambda v: 'ovr' if v > 0.7 else 'high' if v > 0.5 else 'ok'
m0 = Meter(wri,
5,
2,
divisions=4,
ptcolor=YELLOW,
label='left',
style=Meter.BAR,
legends=('0.0', '0.5', '1.0'))
l0 = LED(wri,
ssd.height - 16 - wri.height,
2,
bdcolor=YELLOW,
label='over')
m1 = Meter(wri,
5,
50,
divisions=4,
ptcolor=YELLOW,
label='right',
style=Meter.BAR,
legends=('0.0', '0.5', '1.0'))
l1 = LED(wri,
ssd.height - 16 - wri.height,
50,
bdcolor=YELLOW,
label='over')
m2 = Meter(wri,
5,
98,
divisions=4,
ptcolor=YELLOW,
label='bass',
style=Meter.BAR,
legends=('0.0', '0.5', '1.0'))
l2 = LED(wri,
ssd.height - 16 - wri.height,
98,
bdcolor=YELLOW,
label='over')
steps = 10
for n in range(steps):
v = int.from_bytes(uos.urandom(3), 'little') / 16777216
m0.value(v, color(v))
l0.color(color(v))
l0.text(txt(v), fgcolor=color(v))
v = n / steps
m1.value(v, color(v))
l1.color(color(v))
l1.text(txt(v), fgcolor=color(v))
v = 1 - n / steps
m2.value(v, color(v))
l2.color(color(v))
l2.text(txt(v), fgcolor=color(v))
refresh(ssd)
utime.sleep(1)