Make default notebook widget size smaller and configurable

[jprochazk]

What

• Part of Better default window size when running in notebooks #2289

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[Wumpf]

not sure if that's what we want? The original ticket called for hyper intelligent (😉) sizing where we do stuff like detecting that an incoming image has a certain size.
No idea what a good size is for a widget in a notebook, why is this one better than the previous?

[jprochazk]

I misunderstood. This is just the first part of the issue, then. It's a better default size because it's smaller, taking up less vertical space, and with a 6.4 / 4.8 aspect ratio. The original issue asked for 6.4 x 4.8 inches, but I don't think we actually want to use inches as a unit, even though it's possible.

We can dynamically size the viewer as well, by updating its style. We can do that at any level (in viewer, in web-viewer JS, in widget JS, in notebook.py), but I'm not sure if we actually want to do that. 🤔

[jleibs]

It could be nice if the defaults were something the user could set once as a global instead of needing to override on every call you notebook_show.

[jprochazk]

It could be nice if the defaults were something the user could set once as a global instead of needing to override on every call you notebook_show.

What would that look like? I don't know what would be idiomatic in Python, at least the following would be possible:

# top-level function
from rerun.notebook import set_default_size
set_default_size(width=640, height=480)

# static method
from rerun.notebook import Viewer
Viewer.set_default_size(width=640, height=480)

# "static" property
from rerun.notebook import Viewer
Viewer.size = (640, 840)

[jleibs]

I don't know what would be idiomatic in Python, at least the following would be possible:

@abey79 do you have any thoughts on this?

I find the top-level function design:

from rerun.notebook import set_default_size
set_default_size(width=640, height=480)

to be the most straight-forward to think about.

[abey79]

I find the top-level function design to be the most straight-forward to think about.

Agreed.

[jprochazk]

Alright, I added rerun.notebook.set_default_size