ImageURL not supporting x_units and y_units

Dear all

I am trying to use ImageURL to put a watermark on a plot, but since ImageURL does not support x_units or y_units it is not possible to set these to “screen” and have plot image stationary to the figure when panning and zooming. I have successfully used Label to put a text string on the plot with x_units=“screen” and would like to do the same with ImageURL.

I am uncertain if I am missing something or this would qualify as a feature request.

A minimal working example would be:

#!/usr/bin/env python

from bokeh.models.glyphs import ImageURL

from bokeh.models import ColumnDataSource

from bokeh.plotting import figure, show

import numpy as np

logo_source = ColumnDataSource(dict(url=[“http://bokeh.pydata.org/en/latest/_static/images/logo.png”]))

x = np.random.normal(loc=5000.0, size=400)

y = np.random.normal(loc=5000.0, size=400)

This works

logo_image = ImageURL(url=“url”, x=5000, y=5000, w=50, h=50, w_units=‘screen’, h_units=‘screen’, global_alpha=0.2, )

This does not work. Not possible to set x_units=‘screen’

#logo_image = ImageURL(url=“url”, x=5000, y=5000, w=50, h=50, w_units=‘screen’, h_units=‘screen’, global_alpha=0.2, x_units=‘screen’, y_units=‘screen’ )

p = figure(plot_width=600, plot_height=600)

p.scatter(x,y)

p.add_glyph(logo_source, logo_image)

show§

``

Kind regards

Thomas Jansson