Not working with IpyCanvas

[MarcSkovMadsen]

CROSS POST: bokeh/ipywidgets_bokeh#44

Panel: 0.12.6 Bokeh: 2.4.2 ipywidgets_bokeh: 1.2.1 ipycanvas: 0.10.2 ipykernel: 6.6.0

Raises expected a string or ArrayBuffer, got object.

# pip install ipycanvas panel ipywidgets_bokeh
import panel as pn
from ipycanvas import Canvas

pn.extension('ipywidgets')

canvas = Canvas(width=200, height=200)

# Cubic curves example
def draw():
    canvas.begin_path()
    canvas.move_to(75, 40)
    canvas.bezier_curve_to(75, 37, 70, 25, 50, 25)
    canvas.bezier_curve_to(20, 25, 20, 62.5, 20, 62.5)
    canvas.bezier_curve_to(20, 80, 40, 102, 75, 120)
    canvas.bezier_curve_to(110, 102, 130, 80, 130, 62.5)
    canvas.bezier_curve_to(130, 62.5, 130, 25, 100, 25)
    canvas.bezier_curve_to(85, 25, 75, 37, 75, 40)
    canvas.fill()
    print("drawn")

pn.state.onload(draw)

pn.panel(canvas, height=200, width=200).servable()

[philippjfr]

This is a Bokeh issue and should be resolved by the recent work on serialization support.