[BUG] ImageURL selection_glyph raises "TypeError: this.retries is undefined"

ALL software version info (bokeh, python, notebook, OS, browser, any other relevant packages)

Windows 10 python 3.6 bokeh 1.1.0 firefox 66.0.3 (64-Bit)

Description of expected behavior and the observed behavior

Essentially I’m trying to hide all ImageURL glyphs, which are not selected. To do so, I’m using the the global_alpha attribute of the ImageURL glyph, however, as soon as something gets selected in the data source, all images disappear, and I get a “TypeError: this.retries is undefined” in my browsers console.

Complete, minimal, self-contained example code that reproduces the issue

from bokeh.plotting import figure, show
from bokeh.models.sources import ColumnDataSource
from bokeh.models import ImageURL


sample_url = "https://upload.wikimedia.org/wikipedia/commons/0/06/CIELAB_color_space_top_view.png"

ds = ColumnDataSource(data=dict(
    xs = [0,5,10],
    ys = [0,5,10],
    urls = [sample_url,sample_url,sample_url],
    hs = [50, 50, 50],
    ws = [50, 50, 50]
))

p = figure(title="Sample", tools=["tap"])


# Circle to select since images can't be selected
p.circle(x='xs', y='ys', size=20, source=ds)

renderer = p.image_url(url='urls', x = 'xs', y = 'ys', h='hs', w = 'ws', w_units="screen", h_units="screen", source=ds)

# We want to hide the non-selected image glyphs
selected_image = ImageURL(url='urls', x = 'xs', y = 'ys', h='hs', w = 'ws', global_alpha=1.0, w_units="screen", h_units="screen")
nonselected_image = ImageURL(url='urls', x = 'xs', y = 'ys', h='hs', w = 'ws', global_alpha=0.0, w_units="screen", h_units="screen")


renderer.selection_glyph = selected_image
renderer.nonselection_glyph = nonselected_image

show(p)

Stack traceback and/or browser JavaScript console output

TypeError: this.retries is undefined

[bryevdv]

@ghalter sorry, actually I think your suggestion might be fine after all, since the check to prevent loads is elsewhere. Please submit a PR when you can!

[ghalter]

@bryevdv No Problem, I will do so soon!