How can I check which of my collections are hidden in viewport?

Question

Using this part of code...

for collection in bpy.data.collections:
    print(collection.name, ' - ', collection.hide_viewport)

...I am trying to check which of my collections are hidden in viewport. But the result I get in console, has to do with the collection where are disabled in viewport!!! Any idea what is the correct way?

Related https://blender.stackexchange.com/questions/155563/how-to-hide-a-collection-in-viewport-but-not-disable-in-viewport-via-script — batFINGER, Dec 29 '20 at 10:48
I don't want to hide or unhide a collection but to check if it is hidden!!! Something like hide_get() for object... — Simos Sigma, Dec 29 '20 at 10:54
IMO it's the same thing, see accepted answer, print rather than set. — batFINGER, Dec 29 '20 at 11:02
@brockmann So what I am trying to do is missing... For now at least. — Simos Sigma, Dec 29 '20 at 12:33
Suggest iterate through the collections in context at least (see the link). — brockmann, Dec 29 '20 at 12:46
The link in comment one. Please look at the accepted answer. There is a difference between bpy.types.LayerCollection (in link, the collections assoc with the view layer) ) and bpy.types.Collection in question) See answer below. — batFINGER, Dec 29 '20 at 13:23

score 2 · Accepted Answer · answered Dec 29 '20 at 13:23

Looping collections through bpy.data.collections gives you classes of type Collection: https://docs.blender.org/api/current/bpy.types.Collection.html#bpy.types.Collection

Looping collections through bpy.context.view_layer.layer_collection.children gives you classes of type LayerCollection: https://docs.blender.org/api/current/bpy.types.LayerCollection.html#bpy.types.LayerCollection

The meaning of the property hide_viewport seems to be slightly different in these two class types.

In type Collection it means: "Globally disable in viewports"
In type LayerCollection it means: "Temporarily hide in viewport"
Type LayerCollection additionally exposes the property is_visible, which is True, when the collection is both enabled and visible

I guess LayerCollection.hide_viewport is what you were looking for.

Code example to see the differences in action:

print('Looping type "Collection", property "hide_viewport":')
for collection in bpy.data.collections:
    print(collection.name, ' - Disabled in Viewport:', collection.hide_viewport)
print('Looping type "LayerCollection", property "hide_viewport":')
for layer_collection in bpy.context.view_layer.layer_collection.children:
    print(layer_collection.name, ' - Hidden in Viewport: ', layer_collection.hide_viewport)
print('Looping type "LayerCollection", property "is_visible":')
for layer_collection in bpy.context.view_layer.layer_collection.children:
    print(layer_collection.name, ' - Enabled and visible: ', layer_collection.is_visible)

How can I check which of my collections are hidden in viewport?

1 Answers1

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