first tick label on categorical x-axis misplaced when labels are rotated

[JanHomann]

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Versions

hvplot      0.8.1
holoviews   1.15.1
pandas      1.5.0
python      3.9.13
jupyterlab  3.4.5

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Description

The first tick label on a categorical x-axis is not correctly placed horizontally when tick labels are rotated at an angle (not 0 or 90 degrees). It is much closer to the second tick label than it should be. I noticed that while working with a larger set of labels. This can also be easily seen with a smaller set of labels by making the plot very narrow. I have tested bar, area, line, and scatter. They all have that issue.

Example

import hvplot.pandas
import pandas as pd


df = pd.DataFrame([["Steven Spielberg",    5],
                   ["Alfred Hitchcock",    4],
                   ["Stanley Kubrick",     4],
                   ["Billy Wilder",        4],
                   ["John Huston",         3]],
           columns=['Director',  'Frequency'])

df.hvplot.bar(rot=45, x='Director', y='Frequency', width=150)

Stack traceback

No error message.

Screenshots

[jbednar]

Thanks. My guess is that this is a Bokeh issue rather than HoloViews, since I don't think HoloViews messes with the spacing of individual labels. Making a pure-Bokeh example might be difficult for hvplot users, but maybe this is enough for you to go on, @mattpap?

[mattpap]

Looks similar to this https://github.com/bokeh/bokeh/issues/12069 one, which is easily reproducible in bokeh. I didn't have chance yet to investigate why this happens.

[JanHomann]

Looks similar to this bokeh/bokeh#12069 one, which is easily reproducible in bokeh. I didn't have chance yet to investigate why this happens.

@mattpap I think that the plotting library sees the vertical y-axis label as the outer left edge of the plot, so any tick label that extends beyond that gets shifted inwards. But I could be wrong.

[jbednar]

The Bokeh issue suggests it's fixed in bokeh 3.0, which is imminent, though it may be some time before holoviz tools support the big changes that 3.0 brings.

[mattpap]

No, it's a secondary issue that was fixed (no more "invalid bbox" messages). The misplaced tick label is still a problem.

[jbednar]

Ah, the ever-ambiguous "this" was fixed. :-/