kopia lustrzana https://github.com/peterhinch/micropython-nano-gui
76 wiersze
2.2 KiB
Python
76 wiersze
2.2 KiB
Python
# scale.py Test/demo of scale widget for nano-gui
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# Released under the MIT License (MIT). See LICENSE.
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# Copyright (c) 2020 Peter Hinch
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# Usage:
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# import gui.demos.scale
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# Initialise hardware and framebuf before importing modules.
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from color_setup import ssd # Create a display instance
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from gui.core.nanogui import refresh
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from gui.core.writer import CWriter
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import uasyncio as asyncio
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from gui.core.colors import *
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import gui.fonts.arial10 as arial10
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from gui.widgets.label import Label
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from gui.widgets.scale import Scale
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# COROUTINES
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async def radio(scale):
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cv = 88.0 # Current value
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val = 108.0 # Target value
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while True:
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v1, v2 = val, cv
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steps = 200
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delta = (val - cv) / steps
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for _ in range(steps):
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cv += delta
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# Map user variable to -1.0..+1.0
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scale.value(2 * (cv - 88)/(108 - 88) - 1)
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await asyncio.sleep_ms(200)
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val, cv = v2, v1
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async def default(scale, lbl):
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cv = -1.0 # Current
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val = 1.0
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while True:
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v1, v2 = val, cv
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steps = 400
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delta = (val - cv) / steps
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for _ in range(steps):
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cv += delta
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scale.value(cv)
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lbl.value('{:4.3f}'.format(cv))
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refresh(ssd)
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await asyncio.sleep_ms(250)
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val, cv = v2, v1
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def test():
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def tickcb(f, c):
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if f > 0.8:
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return RED
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if f < -0.8:
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return BLUE
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return c
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def legendcb(f):
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return '{:2.0f}'.format(88 + ((f + 1) / 2) * (108 - 88))
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refresh(ssd, True) # Initialise and clear display.
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CWriter.set_textpos(ssd, 0, 0) # In case previous tests have altered it
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wri = CWriter(ssd, arial10, GREEN, BLACK, verbose=False)
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wri.set_clip(True, True, False)
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scale1 = Scale(wri, 2, 2, width = 124, legendcb = legendcb,
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pointercolor=RED, fontcolor=YELLOW)
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asyncio.create_task(radio(scale1))
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lbl = Label(wri, ssd.height - wri.height - 2, 2, 50,
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bgcolor = DARKGREEN, bdcolor = RED, fgcolor=WHITE)
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scale = Scale(wri, 45, 2, width = 124, tickcb = tickcb,
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pointercolor=RED, fontcolor=YELLOW, bdcolor=CYAN)
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asyncio.run(default(scale, lbl))
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test()
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