GPencilLayer.select does not select the layer in the Dope Sheet #104226

New Issue

Kevin C. Burke · 2023-01-30T04:41:33+01:00

Kevin C. Burke commented

2023-01-30 04:41:33 +01:00

System Information
Operating system: Windows-10-10.0.22621-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 528.24

Blender Version
Broken: 2.83 through 3.5.0 Alpha

Short description of error
The Python API for selecting a GPencilLayer appears to be broken

Exact steps for others to reproduce the error
According to the documentation, GPencilLayer.select is a Boolean for a Layer's selection state in the Dope Sheet. This property, however, currently only retrieves the selected state, but does not edit it. I am not referring to the active layer.

Create a Grease Pencil object
Ensure it is the active object and has a layer named GP_Layer
Run this script in the Text Editor

import bpy

gpencil = bpy.context.object
print(gpencil.data.layers["GP_Layer"].select)
gpencil.data.layers["GP_Layer"].select = not gpencil.data.layers["GP_Layer"].select #toggle state

If this is intended behavior (which would be unfortunate), the documentation should mark select as a read-only property.

This issue has appeared in Grease Pencil's Python API before however it is broken again:
https://developer.blender.org/T103329
https://developer.blender.org/D16841

Proposed fix [D17150 ](https://developer.blender.org/D17150)

**System Information** Operating system: Windows-10-10.0.22621-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 528.24 **Blender Version** Broken: 2.83 through 3.5.0 Alpha **Short description of error** The Python API for selecting a `GPencilLayer` appears to be broken **Exact steps for others to reproduce the error** According to the documentation, [GPencilLayer.select ](https://docs.blender.org/api/current/bpy.types.GPencilLayer.html#bpy.types.GPencilLayer.select) is a Boolean for a Layer's selection state in the Dope Sheet. This property, however, currently only retrieves the selected state, but does not edit it. I am not referring to the active layer. 1. Create a Grease Pencil object 2. Ensure it is the active object and has a layer named `GP_Layer` 3. Run this script in the Text Editor ``` import bpy gpencil = bpy.context.object print(gpencil.data.layers["GP_Layer"].select) gpencil.data.layers["GP_Layer"].select = not gpencil.data.layers["GP_Layer"].select #toggle state ``` If this is intended behavior (which would be unfortunate), the [documentation ](https://docs.blender.org/api/current/bpy.types.GPencilLayer.html#bpy.types.GPencilLayer.select) should mark `select` as a read-only property. This issue has appeared in Grease Pencil's Python API before however it is broken again: https://developer.blender.org/T103329 https://developer.blender.org/D16841 Proposed fix [[D17150](https://archive.blender.org/developer/D17150) ](https://developer.blender.org/D17150)

Kevin C. Burke commented

2023-01-30 04:41:34 +01:00

Added subscriber: @KevinCBurke

Pratik Borhade commented

2023-01-30 10:44:09 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Philipp Oeser commented

2023-01-31 09:52:35 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2023-01-31 09:52:35 +01:00

#103329 has not been fixed yet (since D16841 has not landed).
So, this seems like a duplicate of #103329 then?

Will merge (correct me if I am wrong)

#103329 has not been fixed yet (since [D16841](https://archive.blender.org/developer/D16841) has not landed). So, this seems like a duplicate of #103329 then? Will merge (correct me if I am wrong)

Philipp Oeser commented

2023-01-31 09:52:49 +01:00

Closed as duplicate of #103329

Philipp Oeser closed this issue

2023-01-31 09:52:49 +01:00

Kevin C. Burke commented

2023-01-31 16:59:05 +01:00

Ah, thank you, @lichtwerk . I didn't catch that it hadn't landed. I'm happy to know that a more thorough fix is coming!

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GPencilLayer.select does not select the layer in the Dope Sheet #104226