486 lines
14 KiB
Python
486 lines
14 KiB
Python
# SPDX-License-Identifier: LGPL-3.0-or-later
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# Copyright (C) 2020 Daniel Thompson
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"""Widget library
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~~~~~~~~~~~~~~~~~
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The widget library allows common fragments of logic and drawing code to be
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shared between applications.
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"""
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import fonts
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import icons
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import wasp
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import watch
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from micropython import const
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class BatteryMeter:
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"""Battery meter widget.
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A simple battery meter with a charging indicator, will draw at the
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top-right of the display.
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"""
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def __init__(self):
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self.level = -2
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def draw(self):
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"""Draw from meter (from scratch)."""
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self.level = -2
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self.update()
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def update(self):
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"""Update the meter.
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The update is lazy and won't redraw unless the level has changed.
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"""
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icon = icons.battery
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draw = watch.drawable
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if watch.battery.charging():
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if self.level != -1:
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draw.blit(icon, 239-icon[1], 0,
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fg=wasp.system.theme('battery'))
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self.level = -1
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else:
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level = watch.battery.level()
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if level == self.level:
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return
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green = level // 3
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if green > 31:
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green = 31
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red = 31-green
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rgb = (red << 11) + (green << 6)
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if self.level < 0 or ((level > 5) ^ (self.level > 5)):
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if level > 5:
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draw.blit(icon, 239-icon[1], 0,
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fg=wasp.system.theme('battery'))
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else:
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rgb = 0xf800
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draw.blit(icon, 239-icon[1], 0, fg=0xf800)
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w = icon[1] - 10
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x = 239 - 5 - w
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h = 2*level // 11
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if 18 - h:
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draw.fill(0, x, 9, w, 18 - h)
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if h:
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draw.fill(rgb, x, 27 - h, w, h)
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self.level = level
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class Clock:
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"""Small clock widget."""
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def __init__(self, enabled=True):
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self.on_screen = None
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self.enabled = enabled
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def draw(self):
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"""Redraw the clock from scratch.
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The container is required to clear the canvas prior to the redraw
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and the clock is only drawn if it is enabled.
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"""
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self.on_screen = None
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self.update()
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def update(self):
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"""Update the clock widget if needed.
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This is a lazy update that only redraws if the time has changes
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since the last call *and* the clock is enabled.
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:returns: An time tuple if the time has changed since the last call,
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None otherwise.
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"""
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now = wasp.watch.rtc.get_localtime()
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on_screen = self.on_screen
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if on_screen and on_screen == now:
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return None
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if self.enabled and (not on_screen
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or now[4] != on_screen[4] or now[3] != on_screen[3]):
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t1 = '{:02}:{:02}'.format(now[3], now[4])
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draw = wasp.watch.drawable
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draw.set_font(fonts.sans28)
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draw.set_color(wasp.system.theme('status-clock'))
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draw.string(t1, 52, 4, 138)
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self.on_screen = now
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return now
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class NotificationBar:
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"""Show BT status and if there are pending notifications."""
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def __init__(self, x=0, y=0):
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self._pos = (x, y)
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def draw(self):
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"""Redraw the notification widget.
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For this simple widget :py:meth:`~.draw` is simply a synonym for
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:py:meth:`~.update` because we unconditionally update from scratch.
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"""
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self.update()
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def update(self):
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"""Update the widget.
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This widget does not implement lazy redraw internally since this
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can often be implemented (with less state) by the container.
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"""
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draw = watch.drawable
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(x, y) = self._pos
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if wasp.system.notifications:
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draw.blit(icons.notification, x, y,
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fg=wasp.system.theme('notify-icon'))
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draw.fill(0, x+30, y, 22, 32)
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else:
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draw.fill(0, x, y, 52, 32)
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class StatusBar:
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"""Combo widget to handle notification, time and battery level."""
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def __init__(self):
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self._clock = Clock()
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self._meter = BatteryMeter()
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self._notif = NotificationBar()
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@property
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def clock(self):
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"""True if the clock should be included in the status bar, False
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otherwise.
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"""
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return self._clock.enabled
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@clock.setter
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def clock(self, enabled):
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self._clock.enabled = enabled
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def draw(self):
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"""Redraw the status bar from scratch."""
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self._clock.draw()
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self._meter.draw()
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self._notif.draw()
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def update(self):
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"""Lazily update the status bar.
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:returns: An time tuple if the time has changed since the last call,
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None otherwise.
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"""
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now = self._clock.update()
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if now:
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self._meter.update()
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self._notif.update()
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return now
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class ScrollIndicator:
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"""Scrolling indicator.
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A pair of arrows that prompted the user to swipe up/down to access
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additional pages of information.
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"""
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def __init__(self, x=240-18, y=240-24):
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self._pos = (x, y)
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self.up = True
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self.down = True
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def draw(self):
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"""Draw from scrolling indicator.
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For this simple widget :py:meth:`~.draw` is simply a synonym for
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:py:meth:`~.update`.
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"""
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self.update()
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def update(self):
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"""Update from scrolling indicator."""
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draw = watch.drawable
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color = wasp.system.theme('scroll-indicator')
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if self.up:
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draw.blit(icons.up_arrow, self._pos[0], self._pos[1], fg=color)
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if self.down:
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draw.blit(icons.down_arrow, self._pos[0], self._pos[1]+13, fg=color)
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class Button():
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"""A button with a text label."""
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def __init__(self, x, y, w, h, label):
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self._im = (x, y, w, h, label)
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def draw(self):
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"""Draw the button."""
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draw = wasp.watch.drawable
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im = self._im
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bg = draw.darken(wasp.system.theme('ui'))
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frame = wasp.system.theme('mid')
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txt = wasp.system.theme('bright')
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draw.fill(bg, im[0], im[1], im[2], im[3])
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draw.set_color(txt, bg)
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draw.set_font(fonts.sans24)
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draw.string(im[4], im[0], im[1]+(im[3]//2)-12, width=im[2])
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draw.fill(frame, im[0],im[1], im[2], 2)
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draw.fill(frame, im[0], im[1]+im[3]-2, im[2], 2)
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draw.fill(frame, im[0], im[1], 2, im[3])
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draw.fill(frame, im[0]+im[2]-2, im[1], 2, im[3])
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def touch(self, event):
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"""Handle touch events."""
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x = event[1]
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y = event[2]
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# Adopt a slightly oversized hit box
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im = self._im
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x1 = im[0] - 10
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x2 = x1 + im[2] + 20
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y1 = im[1] - 10
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y2 = y1 + im[3] + 20
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if x >= x1 and x < x2 and y >= y1 and y < y2:
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return True
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return False
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class Checkbox():
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"""A simple (labelled) checkbox."""
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def __init__(self, x, y, label=None):
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self._im = (x, y, label)
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self.state = False
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@property
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def label(self):
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return self._im[2]
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def draw(self):
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"""Draw the checkbox and label."""
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draw = wasp.watch.drawable
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im = self._im
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if im[2]:
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draw.set_color(wasp.system.theme('bright'))
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draw.set_font(fonts.sans24)
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draw.string(im[2], im[0], im[1]+6)
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self.update()
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def update(self):
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"""Draw the checkbox."""
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draw = wasp.watch.drawable
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im = self._im
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if self.state:
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c1 = wasp.system.theme('ui')
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c2 = draw.lighten(c1, wasp.system.theme('contrast'))
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fg = c2
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else:
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c1 = 0
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c2 = 0
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fg = wasp.system.theme('mid')
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# Draw checkbox on the right margin if there is a label, otherwise
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# draw at the natural location
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x = 239 - 32 - 4 if im[2] else im[0]
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draw.blit(icons.checkbox, x, im[1], fg, c1, c2)
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def touch(self, event):
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"""Handle touch events."""
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y = event[2]
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im = self._im
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if y >= im[1] and y < im[1]+40:
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self.state = not self.state
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self.update()
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return True
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return False
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class GfxButton():
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"""A button with a graphical icon."""
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def __init__(self, x, y, gfx):
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self._im = (x, y)
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self.gfx = gfx
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def draw(self):
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"""Draw the button."""
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im = self._im
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wasp.watch.drawable.blit(self.gfx, im[0], im[1])
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def touch(self, event):
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x = event[1]
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y = event[2]
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# Adopt a slightly oversized hit box
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im = self._im
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gfx = self.gfx
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x1 = im[0] - 10
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x2 = x1 + gfx[1] + 20
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y1 = im[1] - 10
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y2 = y1 + gfx[2] + 20
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if x >= x1 and x < x2 and y >= y1 and y < y2:
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return True
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return False
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_SLIDER_KNOB_DIAMETER = const(40)
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_SLIDER_KNOB_RADIUS = const(_SLIDER_KNOB_DIAMETER // 2)
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_SLIDER_WIDTH = const(220)
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_SLIDER_TRACK = const(_SLIDER_WIDTH - _SLIDER_KNOB_DIAMETER)
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_SLIDER_TRACK_HEIGHT = const(8)
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_SLIDER_TRACK_Y1 = const(_SLIDER_KNOB_RADIUS - (_SLIDER_TRACK_HEIGHT // 2))
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_SLIDER_TRACK_Y2 = const(_SLIDER_TRACK_Y1 + _SLIDER_TRACK_HEIGHT)
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class Slider():
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"""A slider to select values."""
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def __init__(self, steps, x=10, y=90, color=None):
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self.value = 0
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self._steps = steps
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self._stepsize = _SLIDER_TRACK / (steps-1)
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self._x = x
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self._y = y
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self._color = color
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self._lowlight = None
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def draw(self):
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"""Draw the slider."""
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draw = watch.drawable
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x = self._x
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y = self._y
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color = self._color
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if self._color is None:
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self._color = wasp.system.theme('ui')
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color = self._color
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if self._lowlight is None:
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self._lowlight = draw.lighten(color, wasp.system.theme('contrast'))
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light = self._lowlight
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knob_x = x + ((_SLIDER_TRACK * self.value) // (self._steps-1))
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draw.blit(icons.knob, knob_x, y, color)
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w = knob_x - x
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if w > 0:
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draw.fill(0, x, y, w, _SLIDER_TRACK_Y1)
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if w > _SLIDER_KNOB_RADIUS:
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draw.fill(0, x, y+_SLIDER_TRACK_Y1,
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_SLIDER_KNOB_RADIUS, _SLIDER_TRACK_HEIGHT)
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draw.fill(color, x+_SLIDER_KNOB_RADIUS, y+_SLIDER_TRACK_Y1,
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w-_SLIDER_KNOB_RADIUS, _SLIDER_TRACK_HEIGHT)
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else:
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draw.fill(0, x, y+_SLIDER_TRACK_Y1, w, _SLIDER_TRACK_HEIGHT)
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draw.fill(0, x, y+_SLIDER_TRACK_Y2, w, _SLIDER_TRACK_Y1)
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sx = knob_x + _SLIDER_KNOB_DIAMETER
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w = _SLIDER_WIDTH - _SLIDER_KNOB_DIAMETER - w
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if w > 0:
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draw.fill(0, sx, y, w, _SLIDER_TRACK_Y1)
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if w > _SLIDER_KNOB_RADIUS:
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draw.fill(0, sx+w-_SLIDER_KNOB_RADIUS, y+_SLIDER_TRACK_Y1,
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_SLIDER_KNOB_RADIUS, _SLIDER_TRACK_HEIGHT)
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draw.fill(light, sx, y+_SLIDER_TRACK_Y1,
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w-_SLIDER_KNOB_RADIUS, _SLIDER_TRACK_HEIGHT)
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else:
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draw.fill(0, sx, y+_SLIDER_TRACK_Y1, w, _SLIDER_TRACK_HEIGHT)
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draw.fill(0, sx, y+_SLIDER_TRACK_Y2, w, _SLIDER_TRACK_Y1)
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def update(self):
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self.draw()
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def touch(self, event):
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tx = event[1]
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threshold = self._x + 20 - (self._stepsize / 2)
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v = int((tx - threshold) / self._stepsize)
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if v < 0:
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v = 0
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elif v >= self._steps:
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v = self._steps - 1
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self.value = v
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class Spinner():
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"""A simple Spinner widget.
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In order to have large enough hit boxes the spinner is a fairly large
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widget and requires 60x120 px.
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"""
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def __init__(self, x, y, mn, mx, field=1):
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self._im = (x, y, mn, mx, field)
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self.value = mn
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def draw(self):
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"""Draw the spinner."""
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draw = watch.drawable
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im = self._im
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fg = draw.lighten(wasp.system.theme('ui'), wasp.system.theme('contrast'))
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draw.blit(icons.up_arrow, im[0]+30-8, im[1]+20, fg)
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draw.blit(icons.down_arrow, im[0]+30-8, im[1]+120-20-9, fg)
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self.update()
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def update(self):
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"""Update the spinner value."""
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draw = watch.drawable
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im = self._im
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draw.set_color(wasp.system.theme('bright'))
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draw.set_font(fonts.sans28)
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s = str(self.value)
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if len(s) < im[4]:
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s = '0' * (im[4] - len(s)) + s
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draw.string(s, im[0], im[1]+60-14, width=60)
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def touch(self, event):
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x = event[1]
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y = event[2]
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im = self._im
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if x >= im[0] and x < im[0]+60 and y >= im[1] and y < im[1]+120:
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if y < im[1] + 60:
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self.value += 1
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if self.value > im[3]:
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self.value = im[2]
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else:
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self.value -= 1
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if self.value < im[2]:
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self.value = im[3]
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self.update()
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return True
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return False
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class ConfirmationView:
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"""Confirmation widget allowing user confirmation of a setting."""
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def __init__(self):
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self.active = False
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self.value = False
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self._yes = Button(20, 140, 90, 45, 'Yes')
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self._no = Button(130, 140, 90, 45, 'No')
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def draw(self, message):
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draw = wasp.watch.drawable
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mute = wasp.watch.display.mute
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mute(True)
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draw.set_color(wasp.system.theme('bright'))
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draw.set_font(fonts.sans24)
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draw.fill()
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draw.string(message, 0, 60)
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self._yes.draw()
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self._no.draw()
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mute(False)
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self.active = True
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def touch(self, event):
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if not self.active:
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return False
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if self._yes.touch(event):
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self.active = False
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self.value = True
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return True
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elif self._no.touch(event):
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self.active = False
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self.value = False
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return True
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return False
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