Adding on_drag_* callbacks to pydeck

[danielXr]

Hi,

tl;dr;
How can I implement callbacks to mouse dragging in pydeck and be able to run it both in Jupyter and as a standalone HTML?
Tried to find documentations or examples and found none.

I'm writing a small tool where I want the ability to move data from one layer in 3D, while the other layers shouldn't move.
The idea is to find the best translation and rotation of a cloud of points (using PointCloudLayer) so that they will fit best on the displayed mesh (using TerrainLayer).
Eventually I would like to save the results in some file.

Thanks,
Daniel.

Environment:

• Framework Version: pydeck 0.5.0
• Jupyter notebook 5.7.10
• OS: Mac OS X 10.15.7

[ajduberstein]

The callbacks that pydeck currently supports are here in the docs—the ones you’re looking for are not in pydeck yet. You might want to write this as a custom layer which you can then import into pydeck.

[Pessimistress]

I suggest you try it with JavaScript first. All layers support onDrag* callbacks in JS. If those are indeed what you need, pydeck can expose them in the Python API.

[danielXr]

@Pessimistress thanks for your reply. This is what I need. Can it be added to pyDeck?

[danielXr]

This something I also really need. When will it be possible to add the drag evens?

• onDragStart
• onDrag
• onDragEnd

[ajduberstein]

It's straightforward to add. I'll work on this.

[danielXr]

@ajduberstein this will be great, thanks!
When do you believe it will be available?

[ajduberstein]

The change is merged–you can now build pydeck now from its source and try it out.

[danielXr]

@ajduberstein thank you, will try it out.
Also, when are you going to release an updated version with this?

[ajduberstein]

Addressed in #5963