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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 watch
class BatteryMeter(object):
"""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 ScrollIndicator():
"""Scrolling indicator.
A simple battery meter with a charging indicator, will draw at the
top-right of the display.
"""
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)
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