Thanks for the link. It seems a little odd that the numbers are part of the datasource but not the units that the numbers are in… Anyway, I’ve raised an issue on github and maybe someone who knows more about the Bokeh API than I do can take a look.
···
On 18 August 2016 at 01:12, Sarah Bird - Continuum sbird@continuum.io wrote:
w_units and h_units do not accept a "DataSpec" argument - that is a
column of a datasource, they only accept the value “string” or
“data”.
For reference:
http://bokeh.pydata.org/en/latest/docs/reference/models/glyphs.html#bokeh.models.glyphs.ImageURL.h_units
On 8/17/16 7:14 AM, Christian Hill
wrote:
Thanks, Sarah, I guess I'll raise a bug report on this.
The error I got happened when I tried:
image_source = ColumnDataSource(
dict(url=[url],
x=[0], y=[0], w=[200], h=[100],
w_units=["screen"], h_units=["screen"])
)
bkgimage = ImageURL(url="url", x="x", y="y", anchor="bottom_left",
global_alpha=0.2, w="w", h="h",
w_units="w_units", h_units="h_units")
working purely by analogy with the other arguments to
ImageURL since the documentation is somewhat lacking around
how this part of the API is supposed to work (probably as a
consequence of the fact that it doesn’t).
Best wishes,
Christian
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On 16 August 2016 at 21:33, Sarah Bird
I
had to correct your code to make it runnable, but I never saw that error. I was able to
set w_units and h_units to
“screen”.
Having said
that, it didn’t seem to be respecting th em as
screen units. I su ggest
open ing
an issue.
On 8/16/16 4:09 AM, Christian Hill wrote:
Helllo,
What is the correct way to add a background
image to a plot using “screen” coordinates
instead of “data” coordinates in Bokeh 0.12?
When I try the following, it still seems to be
using data coordinates.
p = figure(x_range=[5, 10], y_range=[-1, 1], x_axis_type='log')
image_source = ColumnDataSource(
dict(url=[url],
x=[0], y=[0], w=[200], h=[100],
w_units=["screen"], h_units=["screen"])
)
bkgimage = ImageURL(url="url", x="x", y="y", anchor="bottom_left",
global_alpha=0.2, w="w", h="h",
w_units="screen", h_units="screen")
p.add_glyph(image_source, bkgimage)
I expected to be able to set w_units="w_units", h_units="h_units" in my call to ImageURL, but this just gives an error
(
ValueError: invalid value: 'w_units'; allowed values are screen or data).
Cheers,
Christian
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