class BaseScreen(Screen):
def __init__(self):
super().__init__()
Label((0, 0), font=font14, value='Dialog box demonstration.')
Label((0, 100),
font=font10,
value='User written and gdialog generated')
self.lbl_result = Label((10, 50),
font=font10,
fontcolor=WHITE,
width=70,
border=2,
fgcolor=RED,
bgcolor=DARKGREEN)
# User written dialog
fwdbutton(195, 242, UserDialogBox, text='User')
# Dialog built using gdialog.py DialogBox
dialog_elements = (('Yes', GREEN), ('No', RED), ('Foo', YELLOW))
fwdbutton(0,
242,
DialogBox,
text='Gen',
args=(font14, ),
kwargs={
'elements': dialog_elements,
'label': 'Test dialog'
})
quitbutton(390, 242)
def on_open(self):
self.lbl_result.value(Aperture.value())
class BaseScreen(Screen):
def __init__(self):
super().__init__()
# Scale with custom variable and legends.
Label((0, 0), font=font14, value='FM radio scale 88-108MHz.')
def legendcb(f):
return '{:2.0f}'.format(88 + ((f + 1) / 2) * (108 - 88))
self.scale = Scale((0, 30),
font10,
legendcb=legendcb,
width=350,
height=60,
bgcolor=BLACK,
fgcolor=GREEN,
pointercolor=RED,
fontcolor=YELLOW)
self.reg_task(self.radio())
# Scale with varying color.
Label((0, 130),
font=font14,
value='Default scale -1 to +1, varying colors.')
def tickcb(f, c):
if f > 0.8:
return RED
if f < -0.8:
return BLUE
return c
self.lbl_result = Label((0, 240),
font=font14,
fontcolor=WHITE,
width=70,
border=2,
fgcolor=RED,
bgcolor=DARKGREEN)
self.scale1 = Scale((0, 160),
font10,
tickcb=tickcb,
width=350,
height=60,
bgcolor=BLACK,
fgcolor=GREEN,
pointercolor=RED,
fontcolor=YELLOW)
self.reg_task(self.default())
quitbutton(390, 242)
# COROUTINES
async def radio(self):
cv = 88.0 # Current value
val = 108.0 # Target value
while True:
v1, v2 = val, cv
steps = 200
delta = (val - cv) / steps
for _ in range(steps):
cv += delta
# Map user variable to -1.0..+1.0
self.scale.value(2 * (cv - 88) / (108 - 88) - 1)
await asyncio.sleep_ms(200)
val, cv = v2, v1
async def default(self):
cv = -1.0 # Current
val = 1.0
while True:
v1, v2 = val, cv
steps = 400
delta = (val - cv) / steps
for _ in range(steps):
cv += delta
self.scale1.value(cv)
self.lbl_result.value('{:4.3f}'.format(cv))
await asyncio.sleep_ms(250)
val, cv = v2, v1
class KnobScreen(Screen):
def __init__(self):
super().__init__()
Button((390, 240),
font=IFONT16,
callback=self.quit,
fgcolor=RED,
text='Quit',
shape=RECTANGLE,
width=80,
height=30)
dial = VectorDial((120, 0), fgcolor=YELLOW, border=2)
hrs = Pointer(dial)
mins = Pointer(dial)
k0 = Knob((0, 0),
fgcolor=GREEN,
bgcolor=(0, 0, 80),
color=(168, 63, 63),
border=2,
cb_end=self.callback,
cbe_args=['Knob1'],
cb_move=self.knob_moved,
cbm_args=(mins, 0.9))
k1 = Knob((0, 120),
fgcolor=WHITE,
border=2,
arc=pi * 1.5,
cb_end=self.callback,
cbe_args=['Knob2'],
cb_move=self.knob_moved,
cbm_args=(hrs, 0.7))
Label((0, 225), font=font10, value='Arc = 270 degs.')
# Dropdown
self.lbl_dd = Label((120, 120),
font=IFONT16,
width=100,
border=2,
bgcolor=(0, 40, 0),
fgcolor=RED)
self.dropdown = Dropdown(
(280, 0),
font=IFONT16,
width=100,
callback=self.cbdb,
elements=('Dog', 'Cat', 'Rat', 'Goat', 'Snake', 'Pig'))
btnrst = Button((280, 70),
font=IFONT16,
callback=self.set_dropdown,
fgcolor=BLUE,
text='Reset',
shape=RECTANGLE,
width=80,
height=30) # Test of set by value
btnsnake = Button((280, 120),
font=IFONT16,
callback=self.set_bytext,
args=('Snake', ),
fgcolor=CYAN,
fontcolor=BLACK,
text='Snake',
shape=RECTANGLE,
width=80,
height=30) # test set by text
# Listbox
self.lbl_lb = Label((120, 150),
font=IFONT16,
width=100,
border=2,
bgcolor=(0, 40, 0),
fgcolor=RED)
listbox = Listbox(
(370, 70),
font=IFONT16,
width=105,
bgcolor=GREY,
fgcolor=YELLOW,
select_color=BLUE,
elements=('aardvark', 'zebra', 'armadillo', 'warthog'),
callback=self.cblb)
# On/Off toggle grey style
self.lbl_style = Label((170, 210),
font=font10,
value='Current style: grey')
bstyle = ButtonList(self.cb_style)
bstyle.add_button((170, 240),
font=IFONT16,
fontcolor=WHITE,
height=30,
width=90,
fgcolor=RED,
shape=RECTANGLE,
text='Dim',
args=(False, ))
bstyle.add_button((170, 240),
font=IFONT16,
fontcolor=WHITE,
height=30,
width=90,
fgcolor=GREEN,
shape=RECTANGLE,
text='Grey',
args=(True, ))
# On/Off toggle enable/disable
bs = ButtonList(self.cb_en_dis)
self.lst_en_dis = (bstyle, k0, k1, self.dropdown, listbox, btnrst,
btnsnake)
bs.add_button((280, 240),
font=IFONT16,
fontcolor=BLACK,
height=30,
width=90,
fgcolor=GREEN,
shape=RECTANGLE,
text='Disable',
args=(True, ))
bs.add_button((280, 240),
font=IFONT16,
fontcolor=BLACK,
height=30,
width=90,
fgcolor=RED,
shape=RECTANGLE,
text='Enable',
args=(False, ))
# CALLBACKS
# cb_end occurs when user stops touching the control
def callback(self, knob, control_name):
print('{} returned {}'.format(control_name, knob.value()))
def knob_moved(self, knob, pointer, length):
val = knob.value() # range 0..1
pointer.value(length * cmath.exp(-2j * val * pi))
def quit(self, button):
Screen.shutdown()
def cb_en_dis(self, button, disable):
for item in self.lst_en_dis:
item.greyed_out(disable)
def cb_style(self, button, desaturate):
self.lbl_style.value(''.join(
('Current style: ', 'grey' if desaturate else 'dim')))
Screen.set_grey_style(desaturate=desaturate)
def cbdb(self, dropdown):
self.lbl_dd.value(dropdown.textvalue())
def cblb(self, listbox):
self.lbl_lb.value(listbox.textvalue())
def set_dropdown(self, button):
self.dropdown.value(0)
def set_bytext(self, button, txt):
self.dropdown.textvalue(txt)
def __init__(self):
super().__init__()
# These tables contain args that differ between members of a set of related buttons
table = [
{
'fgcolor': GREEN,
'text': 'Yes',
'args': ('Oui', 2),
'fontcolor': (0, 0, 0)
},
{
'fgcolor': RED,
'text': 'No',
'args': ('Non', 2)
},
{
'fgcolor': BLUE,
'text': '???',
'args': ('Que?', 2)
}, # 'fill': False to see effect
{
'fgcolor': GREY,
'text': 'Rats',
'args': ('Rats', 2)
},
]
# Highlight buttons: only tabulate data that varies
table_highlight = [
{
'text': 'P',
'args': ('p', 2)
},
{
'text': 'Q',
'args': ('q', 2)
},
{
'text': 'R',
'args': ('r', 2)
},
{
'text': 'S',
'args': ('s', 2)
},
]
# A Buttonset with two entries
table_buttonset = [
{
'fgcolor': GREEN,
'shape': CLIPPED_RECT,
'text': 'Start',
'args': ('Live', 2)
},
{
'fgcolor': RED,
'shape': CLIPPED_RECT,
'text': 'Stop',
'args': ('Die', 2)
},
]
table_radiobuttons = [
{
'text': '1',
'args': ('1', 3)
},
{
'text': '2',
'args': ('2', 3)
},
{
'text': '3',
'args': ('3', 3)
},
{
'text': '4',
'args': ('4', 3)
},
]
labels = {
'width': 70,
'fontcolor': WHITE,
'border': 2,
'fgcolor': RED,
'bgcolor': (0, 40, 0),
'font': font14,
}
# Uncomment this line to see 'skeleton' style greying-out:
# Screen.tft.grey_color()
# Labels
self.lstlbl = []
for n in range(5):
self.lstlbl.append(Label((390, 40 * n), **labels))
self.lst_en_dis = [] # Controls affected by disable button.
# Button assortment
x = 0
for t in table:
self.lst_en_dis.append(
Button((x, 0),
font=font14,
shape=CIRCLE,
callback=self.callback,
**t))
x += 70
# Highlighting buttons
x = 0
for t in table_highlight:
self.lst_en_dis.append(
Button((x, 60),
fgcolor=CYAN,
shape=CIRCLE,
fontcolor=BLACK,
litcolor=WHITE,
font=font14,
callback=self.callback,
**t))
x += 70
# Pad
lbl_pad = Label((0, 200),
value='touch me',
fontcolor=WHITE,
border=2,
fgcolor=RED,
bgcolor=DARKGREEN,
font=font14)
pad = Pad((0, 200),
width=lbl_pad.width,
height=lbl_pad.height,
onrelease=False,
callback=lambda _: lbl_pad.value('Short'),
lp_callback=lambda _: lbl_pad.value('Long'))
self.lst_en_dis.append(pad)
# Start/Stop toggle
self.bs = ButtonList(self.callback)
self.bs0 = None
for t in table_buttonset: # Buttons overlay each other at same location
button = self.bs.add_button((0, 240),
font=font14,
fontcolor=BLACK,
height=30,
**t)
if self.bs0 is None: # Save for reset button callback
self.bs0 = button
self.lst_en_dis.append(self.bs)
# Radio buttons
x = 0
self.rb = RadioButtons(BLUE, self.callback) # color of selected button
self.rb0 = None
for t in table_radiobuttons:
button = self.rb.add_button((x, 140),
font=font14,
fontcolor=WHITE,
fgcolor=(0, 0, 90),
height=40,
width=40,
**t)
if self.rb0 is None: # Save for reset button callback
self.rb0 = button
x += 60
self.lst_en_dis.append(self.rb)
# Checkbox
self.cb1 = Checkbox((340, 0), callback=self.cbcb, args=(0, ))
self.cb2 = Checkbox((340, 40),
fillcolor=RED,
callback=self.cbcb,
args=(1, ))
self.lst_en_dis.extend([self.cb1, self.cb2])
# Reset button
self.lbl_reset = Label((200, 210),
font=font10,
value='Reset also responds to long press')
self.btn_reset = Button((300, 240),
font=font14,
height=30,
width=80,
fgcolor=BLUE,
shape=RECTANGLE,
text='Reset',
fill=True,
callback=self.cbreset,
args=(4, ),
onrelease=False,
lp_callback=self.callback,
lp_args=('long', 4))
# Quit
self.btn_quit = Button((390, 240),
font=font14,
height=30,
width=80,
fgcolor=RED,
shape=RECTANGLE,
text='Quit',
callback=self.quit)
# Enable/Disable toggle
self.bs_en = ButtonList(self.cb_en_dis)
self.bs_en.add_button((200, 240),
font=font14,
fontcolor=BLACK,
height=30,
width=90,
fgcolor=GREEN,
shape=RECTANGLE,
text='Disable',
args=(True, ))
self.bs_en.add_button((200, 240),
font=font14,
fontcolor=BLACK,
height=30,
width=90,
fgcolor=RED,
shape=RECTANGLE,
text='Enable',
args=(False, ))