Bug 459806

Summary: Timeline UX: Actions on unlocked layers are blocked when the active layer happens to be locked.
Product: [Applications] krita Reporter: Emmet O'Neill <emmetoneill.pdx>
Component: AnimationAssignee: Krita Bugs <krita-bugs-null>
Status: CONFIRMED ---    
Severity: minor    
Priority: NOR    
Version First Reported In: git master (please specify the git hash!)   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Emmet O'Neill 2022-09-28 21:24:01 UTC 
SUMMARY
If the active layer, LAYER_A, is locked and you select a frame on a different, unlocked layer, LAYER_B, that frame will not be deleted when the delete keyframe button is pushed. The same is true for adding frames.

More info:
https://invent.kde.org/graphics/krita/-/merge_requests/1597


STEPS TO REPRODUCE
1. Create a file with 2 layers.
2. Lock LAYER_A, Unlock LAYER_B
3. Make sure that the locked layer, LAYER_A, is active, and select a frame on the unlocked layer, LAYER_B.
4. Click the `Create Blank Keyframe` button 

OBSERVED RESULT
Notice that a new frame will not be added on the unlocked LAYER_B, because the active LAYER_A is locked.

EXPECTED RESULT
We should either (a) limit keyframe addition and deletion operations to the active layer like most operations within Krita, or (b) we should make sure that operations happen as expected on unlocked layers regardless of the locking status of the active layer.