Animation Tree: State machine nodes view does not refresh on Undo/Redo creating new node (until next click)

[hsandt]

Tested versions

• Reproducible in v4.2.1.stable.official [b09f793f5]

System information

Godot v4.2.1.stable - Ubuntu 22.04.4 LTS 22.04 - X11 - Vulkan (Mobile) - dedicated NVIDIA GeForce GTX 860M (nvidia; 535.161.07) - Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz (8 Threads)

Issue description

The Animation Tree panel's State Machine view does not update/refresh properly when undoing or redoing an Add node action. User must click on said area to force refresh.

Peek 2024-04-23 Animation Tree panel doesnt refresh on state machine add node undo-redo.webm

Steps to reproduce

1. Add an Animation Tree node
2. Inspector > Tree Root > new AnimationNodeStateMachine
3. In AnimationTree panel, start adding new nodes (if you don't have dummy animations to add, just put BlendSpace1D instead)
4. Undo (ctrl+Z) state machine node creation => no visible change
5. Click: view is now refreshed, with nodes removed
6. Redo (ctrl+shift+Z) => no visible change
7. Click: view is now refreshed, with nodes re-added

Minimal reproduction project (MRP)

N/A

[AThousandShips]

Please try with 4.2.2

[hsandt]

Confirmed bug with v4.2.2.stable.official [15073afe3]

I notice that in step 5, "Click: view is now refreshed, with nodes removed" I can also just move the mouse over the Node that is supposed to be removed and it also refreshes the view (but it was probably already like that in 4.2.1).