BUG: Heatmapgl does not show at all in subplots, and other bugs

[erezinman]

Using python v3.6.9 & plotly v4.14.1 on Chrome I get several different bugs with Heatmapgl:

1. When adding Heatmapgl to a subplot, nothing's shown.
2. Heatmapgl has "fast" zsmoothing by default (in contrast to Heatmap which is False).
3. Heatmapgl's zsmooth=False results in a truncated auto-view.
4. Heatmapgl's does not allow zooming/panning from the axes, and double-click doesn't work.
5. Heatmapgl's toolbar has a lot less options.

This trace feels half-baked. It is really too-bad that I can not use it because I wished to show large spectrograms, and I can't using plotly.

In more detail:

Consider the following code:

import plotly.graph_objs as go
from plotly.subplots import make_subplots

fig = make_subplots(rows=1, cols=2)
fig.add_trace(go.Heatmapgl(z=[[0, 1, 2], [2, 0, 1], [1, 2, 0]], colorscale='Picnic'), row=1, col=1)
fig.add_trace(go.Heatmap(z=[[0, 1, 2], [2, 0, 1], [1, 2, 0]], colorscale='Picnic'), row=1, col=2)
fig.show(renderrer='browser')

And I get a blamk page with a color bar:

Note that the same happens with other kinds of traces as secondary to Heatmapgl (like Scattergl).

Now, if I comment-out either lines, I get the traces as expected, only that for the Heatmapgl, I get a strange smoothing by default:

So I went ahead and set zsmooth=False for the Heatmapgl, and I got:

Note the missing buttons in the toolbar ("spike-lines" and "compare" which exist in Heatmap). I wasn't able to pan and zoom the plot by dragging the axes in the usual places. Also, after panning using the toolbar button, double-click did not return me to the original view.

Thanks.

[adriwitek]

Same problem too

[nicolaskruchten]

We are deprecating the heatmapgl trace in the next version of Plotly.js (2.0) and Plotly.py (5.0) which should be out in a couple of weeks. There are indeed many problems with this trace and we will like not be able to fix them, so we will try to improve the performance of heatmap instead.

[Jahn-KSB]

please bring the heatmapGL back! :D