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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 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 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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