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maartenbreddels/

solara-ipycanvas-smiley

Smiley Face Canvas Drawing Demo Using Solara and Ipycanvas

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  • app.py
  • requirements.txt
app.py
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from math import pi
from ipycanvas import Canvas
import ipycanvas
import traitlets

import solara
import solara.tasks


# in solara, you need to create a canvas manager, since global widgets cannot be share between users
canvas = Canvas(width=1600, height=1200, layout=dict(width='100%'), _canvas_manager=ipycanvas.canvas._CanvasManager())

# ok, use this workaround for ipycanvas for using a singleton widget
# ipycanvas.canvas._CanvasBase._canvas_manager.default_value = traitlets.Undefined
# ipycanvas.canvas._CanvasBase._canvas_manager.make_dynamic_default = ipycanvas.canvas._CanvasManager

canvas.fill_style = '#8ee05e'
canvas.fill_rect(0, 0, canvas.width, canvas.height)

canvas.fill_style = '#f5f533'
canvas.fill_circle(canvas.width / 2., canvas.height / 2., 500)

canvas.stroke_style = 'black'
canvas.line_width = 30
canvas.stroke_circle(canvas.width / 2., canvas.height / 2., 500)

canvas.fill_style = 'black'
canvas.fill_circle(canvas.width / 2.7, canvas.height / 3., 100)  # Right eye
canvas.stroke_arc(canvas.width / 2., canvas.height / 2., 400, 0, pi, False)  # Mouth
canvas.stroke_arc(canvas.width - canvas.width / 2.7, canvas.height / 2.7, 100, 0, pi, True)  # Left eye

page = canvas
requirements.txt
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solara
ipycanvas