Revise textposition default for bar, histogram and waterfall

[archmoj]

Resolves #5624.

@plotly/plotly_js

[alexcjohnson]

Looking particularly at the histogram-offsetgroups mock, I'm wondering if we shouldn't be a little more nuanced about this: if text is an array, default textposition='auto'. But if text is a string, that was probably meant only to show in hover so default to textposition='none'.

We have no such logic for scatter, but in that case it's fairly common to want all markers in a trace to get the same text - the text may even BE the marker.

I could could go either way on this, just wanted to throw it out there. The "always auto" logic is nice for its simplicity, and I'd do it this way if starting fresh, it just may break more graphs than we would need to with the v2 upgrade. @nicolaskruchten @archmoj thoughts?

[nicolaskruchten]

But if text is a string, that was probably meant only to show in hover

I can see what you mean, but this seems like really edge-case behaviour, probably used in cases where folks didn't want to rename the trace or something? Sure, let's carve something out for that.

[archmoj]

Looking particularly at the histogram-offsetgroups mock, I'm wondering if we shouldn't be a little more nuanced about this: if text is an array, default textposition='auto'. But if text is a string, that was probably meant only to show in hover so default to textposition='none'.

We have no such logic for scatter, but in that case it's fairly common to want all markers in a trace to get the same text - the text may even BE the marker.

I could could go either way on this, just wanted to throw it out there. The "always auto" logic is nice for its simplicity, and I'd do it this way if starting fresh, it just may break more graphs than we would need to with the v2 upgrade. @nicolaskruchten @archmoj thoughts?

Bar and histogram do not have textinfo at the moment; but waterfall has.
BTW using textinfo or texttemplate people could include additional info such as values in the text.
I think depending on the type of text to be an array to enable so called auto behaviour is rather confusing.
Concerning the histogram baseline change, it seems to me the labels actually helped improve the graph.
Sure there might be cases that this may not be desirable; but then it would be as easy as using the none option.

[alexcjohnson]

Right, thinking about this more, especially with all the other work we're doing to simplify defaults for v2, making this conditional default seems like a step backward.

So to me this is good to go 💃 unless @nicolaskruchten wants to argue for sticking with my previous suggestion 😅

[nicolaskruchten]

I'm good, please merge :)