Improving bokeh unselected glyph styling

[denglert]

According to
http://holoviews.org/Tutorials/Bokeh_Backend.html
-> Selection tools
one should be able to specify the unselected_color which determines the color of unselected colors when using e.g. tools=[lasso_select].

However, this

%opts Points [tools=['lasso_select']] (s=5 color='tomato' unselected_color='white' alpha=0.05)  Layout [shared_axes=True shared_datasource=True]
a  = all_ds.to(hv.Points, kdims=['mA', 'gt'], vdims=[], mdims=[])
b = a.map(lambda x: x.clone(kdims=['PS', 'rs'], vdims=[]), [hv.Points]) 
c = a.map(lambda x: x.clone(kdims=['xsec_zh_r1_only', 'xsec_zh_r2_only'], vdims=[]), [hv.Points])
d = a.map(lambda x: x.clone(kdims=['xsec_zh_all', 'xsec_zh_z_only'], vdims=[]), [hv.Points])

gives me the following error:
AttributeError [Call holoviews.ipython.show_traceback() for details] unexpected attribute 'alpha' to Circle, similar attributes are line_alpha or fill_alpha

hv.ipython.show_traceback()
Traceback (most recent call last):
File "/home/de3u14/lib/anaconda/envs/hv-dev/lib/python3.6/site-packages/holoviews/plotting/bokeh/element.py", line 638, in initialize_plot renderer, glyph = self._init_glyph(plot, mapping, properties)
File "/home/de3u14/lib/anaconda/envs/hv-dev/lib/python3.6/site-packages/holoviews/plotting/bokeh/chart.py", line 127, in _init_glyph unselected = Circle(**dict(properties, fill_color=unselect_color, **mapping))
File "/home/de3u14/lib/anaconda/envs/hv-dev/lib/python3.6/site-packages/bokeh/model.py", line 145, in __init__ super(Model, self).__init__(**kwargs) File "/home/de3u14/lib/anaconda/envs/hv-dev/lib/python3.6/site-packages/bokeh/core/has_props.py", line 222, in __init__ setattr(self, name, value)
File "/home/de3u14/lib/anaconda/envs/hv-dev/lib/python3.6/site-packages/bokeh/core/has_props.py", line 258, in __setattr__ (name, self.__class__.__name__, text, nice_join(matches))) AttributeError: unexpected attribute 'alpha' to Circle, similar attributes are line_alpha or fill_alpha

If using fill_alpha instead of alpha I get circles with black edges, and seem to loose the ability to select points (i.e. I don't see any visual feedback)

On a related note it would be nice to also specify unselected_alpha to improve the unselected glyph styling.

(edit)
Example notebook:
https://www.dropbox.com/s/x7mokfpqf5lpuen/mwtc_xsec_scan_holoviews-1.6.2-unselected.ipynb?dl=0

Cheers,
David

[philippjfr]

I've now provided full control over the regular, unselection and unselection glyphs. They are now all available as style options. Note however that unselected_color is now unselection_color.

[github-actions]

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