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# SPDX-License-Identifier: LGPL-3.0-or-later
# Copyright (C) 2020 Daniel Thompson
"""Widget library
~~~~~~~~~~~~~~~~~
The widget library allows common fragments of logic and drawing code to be
shared between applications.
"""
import fonts
import icons
import wasp
import watch
from micropython import const
class BatteryMeter:
"""Battery meter widget.
A simple battery meter with a charging indicator, will draw at the
top-right of the display.
"""
def __init__(self):
self.level = -2
def draw(self):
"""Draw from meter (from scratch)."""
self.level = -2
self.update()
def update(self):
"""Update the meter.
The update is lazy and won't redraw unless the level has changed.
"""
icon = icons.battery
draw = watch.drawable
if watch.battery.charging():
if self.level != -1:
draw.rleblit(icon, pos=(239-icon[0], 0), fg=0x7bef)
self.level = -1
else:
level = watch.battery.level()
if level == self.level:
return
if level > 96:
h = 24
rgb = 0x07e0
else:
h = level // 4
green = level // 3
red = 31-green
rgb = (red << 11) + (green << 6)
if (level > 5) ^ (self.level > 5):
if level > 5:
draw.rleblit(icon, pos=(239-icon[0], 0), fg=0x7bef)
else:
rgb = 0xf800
draw.rleblit(icon, pos=(239-icon[0], 0), fg=0xf800)
x = 239 - 30
w = 16
if 24 - h:
draw.fill(0, x, 14, w, 24 - h)
if h:
draw.fill(rgb, x, 38 - h, w, h)
self.level = level
class Clock:
"""Small clock widget."""
def __init__(self, enabled=True):
self.on_screen = None
self.enabled = enabled
def draw(self):
"""Redraw the clock from scratch.
The container is required to clear the canvas prior to the redraw
and the clock is only drawn if it is enabled.
"""
self.on_screen = None
self.update()
def update(self):
"""Update the clock widget if needed.
This is a lazy update that only redraws if the time has changes
since the last call *and* the clock is enabled.
:returns: An time tuple if the time has changed since the last call,
None otherwise.
"""
now = wasp.watch.rtc.get_localtime()
on_screen = self.on_screen
if on_screen and on_screen == now:
return None
if self.enabled and (not on_screen or now[4] != on_screen[4]):
t1 = '{:02}:{:02}'.format(now[3], now[4])
draw = wasp.watch.drawable
draw.set_font(fonts.sans28)
draw.set_color(0xe73c)
draw.string(t1, 52, 12, 138)
self.on_screen = now
return now
class NotificationBar:
"""Show BT status and if there are pending notifications."""
def __init__(self, x=8, y=8):
self._pos = (x, y)
def draw(self):
"""Update the notification widget.
For this simple widget :py:meth:`~.draw` is simply a synonym for
:py:meth:`~.update`.
"""
self.update()
def update(self):
"""Update the widget.
"""
draw = watch.drawable
(x, y) = self._pos
if wasp.watch.connected():
draw.blit(icons.blestatus, x, y, fg=0x7bef)
if wasp.system.notifications:
draw.blit(icons.notification, x+24, y, fg=0x7bef)
else:
draw.fill(0, x+24, y, 32, 32)
elif wasp.system.notifications:
draw.blit(icons.notification, x, y, fg=0x7bef)
draw.fill(0, x+32, y, 32, 32)
else:
draw.fill(0, x, y, 56, 32)
class ScrollIndicator:
"""Scrolling indicator.
A pair of arrows that prompted the user to swipe up/down to access
additional pages of information.
"""
def __init__(self, x=240-18, y=240-24):
self._pos = (x, y)
self.up = True
self.down = True
def draw(self):
"""Draw from scrolling indicator.
For this simple widget :py:meth:`~.draw` is simply a synonym for
:py:meth:`~.update`.
"""
self.update()
def update(self):
"""Update from scrolling indicator."""
draw = watch.drawable
if self.up:
draw.rleblit(icons.up_arrow, pos=self._pos, fg=0x7bef)
if self.down:
draw.rleblit(icons.down_arrow, pos=(self._pos[0], self._pos[1] + 13), fg=0x7bef)
_SLIDER_KNOB_DIAMETER = const(40)
_SLIDER_KNOB_RADIUS = const(_SLIDER_KNOB_DIAMETER // 2)
_SLIDER_WIDTH = const(220)
_SLIDER_TRACK = const(_SLIDER_WIDTH - _SLIDER_KNOB_DIAMETER)
_SLIDER_TRACK_HEIGHT = const(8)
_SLIDER_TRACK_Y1 = const(_SLIDER_KNOB_RADIUS - (_SLIDER_TRACK_HEIGHT // 2))
_SLIDER_TRACK_Y2 = const(_SLIDER_TRACK_Y1 + _SLIDER_TRACK_HEIGHT)
class Slider():
"""A slider to select values."""
def __init__(self, steps, x=10, y=90, color=0x39ff):
self.value = 0
self._steps = steps
self._stepsize = _SLIDER_TRACK / (steps-1)
self._x = x
self._y = y
self._color = color
# Automatically generate a lowlight color
if color < 0b10110_000000_00000:
color = (color | 0b10110_000000_00000) & 0b10110_111111_11111
if (color & 0b111111_00000) < 0b101100_00000:
color = (color | 0b101100_00000) & 0b11111_101100_11111
if (color & 0b11111) < 0b10110:
color = (color | 0b11000) & 0b11111_111111_10110
self._lowlight = color
def draw(self):
"""Draw the slider."""
draw = watch.drawable
x = self._x
y = self._y
color = self._color
light = self._lowlight
knob_x = x + ((_SLIDER_TRACK * self.value) // (self._steps-1))
draw.blit(icons.knob, knob_x, y, color)
w = knob_x - x
if w > 0:
draw.fill(0, x, y, w, _SLIDER_TRACK_Y1)
if w > _SLIDER_KNOB_RADIUS:
draw.fill(0, x, y+_SLIDER_TRACK_Y1,
_SLIDER_KNOB_RADIUS, _SLIDER_TRACK_HEIGHT)
draw.fill(color, x+_SLIDER_KNOB_RADIUS, y+_SLIDER_TRACK_Y1,
w-_SLIDER_KNOB_RADIUS, _SLIDER_TRACK_HEIGHT)
else:
draw.fill(0, x, y+_SLIDER_TRACK_Y1, w, _SLIDER_TRACK_HEIGHT)
draw.fill(0, x, y+_SLIDER_TRACK_Y2, w, _SLIDER_TRACK_Y1)
sx = knob_x + _SLIDER_KNOB_DIAMETER
w = _SLIDER_WIDTH - _SLIDER_KNOB_DIAMETER - w
if w > 0:
draw.fill(0, sx, y, w, _SLIDER_TRACK_Y1)
if w > _SLIDER_KNOB_RADIUS:
draw.fill(0, sx+w-_SLIDER_KNOB_RADIUS, y+_SLIDER_TRACK_Y1,
_SLIDER_KNOB_RADIUS, _SLIDER_TRACK_HEIGHT)
draw.fill(light, sx, y+_SLIDER_TRACK_Y1,
w-_SLIDER_KNOB_RADIUS, _SLIDER_TRACK_HEIGHT)
else:
draw.fill(0, sx, y+_SLIDER_TRACK_Y1, w, _SLIDER_TRACK_HEIGHT)
draw.fill(0, sx, y+_SLIDER_TRACK_Y2, w, _SLIDER_TRACK_Y1)
def update(self):
self.draw()
def touch(self, event):
tx = event[1]
threshold = self._x + 20 - (self._stepsize / 2)
v = int((tx - threshold) / self._stepsize)
if v < 0:
v = 0
elif v >= self._steps:
v = self._steps - 1
self.value = v
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