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Passing colorbar=True to a datashaded element could raise a warning

See original GitHub issue

Since colorbar doesn’t apply in this case?

points = df.hvplot.points('index', 'value')
datashade(points).options(colorbar=True)

Issue Analytics

State:
Created 5 years ago
Comments:5 (4 by maintainers)

Top GitHub Comments

1reaction

philippjfrcommented, Jul 14, 2018

I wasn’t quite right about that. In the matplotlib backend the RasterPlot class handles Rasters, Images and RGBs. In the bokeh backend the problem is that RGBPlot inherits the colorbar parameter from RasterPlot. So what would need to happen is that in both backends we need to ensure that the RGBPlot class does not inherit from ColorbarPlot.

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jbednarcommented, Jul 14, 2018

No, I think RGB inheriting from Image is by design; semantically, it’s a type of Image. But these are the element classes; what’s shared is the bokeh and matplotlib plotting class RGBPlot. Specifically, there’s no separate ImagePlot class. But we can’t simply copy RGBPlot to another one ImagePlot and omit the colorbar option, because RGBPlot inherits from RasterPlot which inherits from ColorbarPlot, which is presumably what makes it support the colorbar option. So it will take a bit of juggling classes to get things working properly…