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Ran 18 May 2026 03:48PM UTC

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Build # 26044135732

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push

github

Committed by

web-flow

Commit Message

Update for new jupyter_rfb and add experimental Marimo support (#2738)

Jupyter_rfb underwent some massive refactoring lately to (finally) use
anywidget!

### Compatibility

This PR updates to the new version, although it is still compatible with
older versions of jupyter_rfb.

Jupyter_rfb has a flag to help in the transition process
(`_event_compatibility`). This PR sets it to get the new-style events.
This means that once Vispy uses this for say a year, jupyter_rfb can
remove its compatibility logic for the old-style events.

Once the new jupyter_rfb has been tested in the field for a while, we
can pin in to 1.x, and remove some of the compatibility code in *our*
module.

### Titlebar

The new widget supports a titlebar, so we can show titles too. Currently
I set it up to show the titlebar if there is a title, and hide it when
the title is an empty string.

### Marimo

With anywidget, we can also use the marimo notebook! There are two open
issues though. I just created/commented them, so we can wait for an
answer.

* I'm not sure what the recommended way to detect Marimo is. I
implemented something, but maybe a better method exists. See
https://github.com/marimo-team/marimo/discussions/8865
* The `canvas._backend` is an anywidget, the `canvas` itself is not. In
Marimo, the `_repr_mimetype_` delegation is not enough. See
https://github.com/manzt/anywidget/issues/792

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