RNA: Expose bases in ViewLayer to python
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Authored by Erik Abrahamsson (erik85) on Nov 16 2020, 2:28 AM.

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Summary

This patch exposes the bases of a view layer to Python.
Code example to hide all objects with a name starting with 'C' from the viewport, in the current view_layer:

import bpy

for base in bpy.context.view_layer.bases:
    if base.object_name[:1] == 'C':
        base.hide_viewport = True

Bases can also be accessed with object name like this: bpy.context.view_layer.bases['Camera'].

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Repository: rB Blender

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Erik Abrahamsson (erik85) requested review of this revision.Nov 16 2020, 2:28 AM

Erik Abrahamsson (erik85) created this revision.

Erik Abrahamsson (erik85) edited the summary of this revision. (Show Details)

Erik Abrahamsson (erik85) edited the summary of this revision. (Show Details)Nov 16 2020, 2:34 AM

Erik Abrahamsson (erik85) mentioned this in T82743: Info window return a (null) as parameter for 'eye' icon in out-liner if the object is not selected.Nov 16 2020, 1:52 PM

I would rather this doesn't get accepted. The reasoning behind not exposing bases in the API was deliberate in the 2.8 project. They add complexity to the API and it is not something users are familiar with.

We can still think of ways for the API to support this feature request case (e.g., passing v3d as argument to visible_get). But please not by exposing bases.

I thought we had a way already though to do something similar.

I trust that you know by your huge experience what you are talking about, but from my point of view it's definitely the easiest way to access view layer specific settings per object and really should be possible through the API.
The two properties available are hide_viewport and select. Who knows, maybe in the future there will be more view layer specific settings and then those will appear automagically instead of making workarounds for those too.

RedMser (RedMser) added a subscriber: RedMser (RedMser).Nov 16 2020, 6:56 PM

Closing this because I discovered it's already possible through Object.hide_set(state, view_layer)

Erik Abrahamsson (erik85) mentioned this in D10028: Fix T77844: Expose 'ViewLayer.object_bases' to RNA/Python API.Jan 7 2021, 12:39 PM