Unable to interactively update renderer (i.e. circle, triangle, etc.) size using Bokeh server

I am able to update the color and line width of renderers in Bokeh server, but if I try to update the “size” nothing happens. You can type in a color (black, green, blue, etc) into the color box, and the renderers change color. I have been tweaking the sliders.py example to test this out. The code is below. If you change the glyph.size to glyph.line_width in the update_size method, then the plot does update the line width, but using “size”, nothing happens. I am using Python 2.7.12, Ubuntu 16.04, bokeh server 0.12.5, and Tornado 4.4.2.

A user at stackoverflow did note that if you scrub the sliders, then the size will change, so he felt this was a bug of some sort (https://stackoverflow.com/questions/43577293/unable-to-interactively-update-renderer-i-e-circle-triangle-etc-size-using)

Below is my code:

import numpy as np
from bokeh.io import curdoc
from bokeh.layouts import row, widgetbox
from bokeh.models import ColumnDataSource
from bokeh.models.widgets import Slider, TextInput
from bokeh.plotting import figure

# Set up data
N = 200
x = np.linspace(0, 4*np.pi, N)
y = np.sin(x)
source = ColumnDataSource(data=dict(x=x, y=y))

# Set up widgets
text = TextInput(title="title", value='my sine wave')
text2 = TextInput(title="size", value='6')
text3 = TextInput(title="color", value='red')
offset = Slider(title="offset", value=0.0, start=-5.0, end=5.0, step=0.1)
amplitude = Slider(title="amplitude", value=1.0, start=-5.0, end=5.0)
phase = Slider(title="phase", value=0.0, start=0.0, end=2*np.pi)
freq = Slider(title="frequency", value=1.0, start=0.1, end=5.1)

# Set up plot
plot = figure(plot_height=400, plot_width=400, title="my sine wave",
              tools="crosshair,pan,reset,save,wheel_zoom",
              x_range=[0, 4*np.pi], y_range=[-2.5, 2.5])

r = plot.circle('x', 'y', source=source, size=int(text2.value), line_alpha=0.6, color = text3.value, legend = 'test')
glyph = r.glyph

# Set up callbacks
def update_title(attrname, old, new):
    plot.title.text = text.value

text.on_change('value', update_title)

def update_size(attrname, old, new):
    glyph.size = int(text2.value)    

text2.on_change('value', update_size)

def update_color(attrname, old, new):
    glyph.fill_color = text3.value

text3.on_change('value', update_color)

def update_data(attrname, old, new):

    # Get the current slider values
    a = amplitude.value
    b = offset.value
    w = phase.value
    k = freq.value

    # Generate the new curve
    x = np.linspace(0, 4*np.pi, N)
    y = a*np.sin(k*x + w) + b

    source.data = dict(x=x, y=y)

for w in [offset, amplitude, phase, freq]:
    w.on_change('value', update_data)

# Set up layouts and add to document
inputs = widgetbox(text, text2, text3, offset, amplitude, phase, freq)
plot.legend.location = "top_left"
plot.legend.click_policy="hide"
curdoc().add_root(row(inputs, plot, width=800))
curdoc().title = "Sliders"

[bryevdv]

@oxydron I have scheduled this of for the 0.12.7 release (it is too late for the next release which is tomorrow). In the mean time, have you tried updating the .start and .end on an existing range, instead replacing an entire range? I know for certain that this has been demonstrated successfully on many occasions. (Bokeh is a large and complicated library and some use cases are simply more well-established than others at this point. Of course we’d like everything to be perfect but the only thing that can speed up the rate of development at this point is more developers)

If you have tried this and are saying that this approach is not working, please post a complete minimal test case so that it can be investigated.

[oxydron]

Indeed @bryevdv seems that I can do something with it. I’ve put the change inside the update call, but doesn’t plot right. source: https://pastebin.com/kJbVTEPQ analysis file: https://pastebin.com/VxHuKg9P command: bokeh serve --show filey.py Any help would be appreciated (including on how to not use global vars 👎 )

Thanks