Equivalent of curdoc().hold("combine") on slider mouseup

jzimmer · July 12, 2023, 10:07am

This example shows how to use the nice hold(“combine” ) function:

bokeh/bokeh/blob/branch-2.4/examples/howto/hold_app.py

import numpy as np

from bokeh.events import ButtonClick
from bokeh.io import curdoc
from bokeh.layouts import column, row
from bokeh.models import Button, ColumnDataSource, Div, Slider
from bokeh.plotting import figure

doc = curdoc()

x = np.linspace(0, 2, 1000)
y = 1 - (x-1)**2

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

p  = figure(toolbar_location=None, background_fill_color="#fafafa")
p.circle(x=1, y=list(range(0, 11)))
p.line('x', 'y', color="orange", source=source)

slider = Slider(start=0, end=10, step=0.1, value=1)

This file has been truncated. show original

A slider widget has the value_throttled attribute, that can be used for a callback:

Is there a way to somehow combine the two ideas?

I want my slider to call its callback on every update, but on mouseup all the (potentially) remaining events should be combined into a single event. This would make it seem much more responsive.

Is there any chance this is possible?

Bryan · July 12, 2023, 3:04pm

It’s possible to add callbacks to both "value" and "value_throttled" at the same time, so I don’t see why not.