Scene hierarchy widget size control on the left side behave strangely

[mwestphal]

Describe the bug
Scene hierarchy widget size control on the left side behave strangely.
Moving left increase the size A LOT.
Movign right reduce it.

Here is a video:

simplescreenrecorder-2026-04-05_10.56.15.mp4

To Reproduce
Steps to reproduce the behavior:

1. Open the file using f3d --show-hierarchy example.glb
2. Grab widget side on the left side
3. Move it

Expected behavior
TBH im not sure, but not this.

System Information:

• OS: Any
• GPU and GPU driver: Any

F3D Information
Paste the content of f3d --version or f3d-console.exe --version on Windows: 3.5.0

Additional context
Add any other context about the problem here.

[lilac0o0]

Can I try working on this @mwestphal ?

[mwestphal]

Unassigning because stalled.

[AnikethTS]

Hey, I’d like to work on this one. I took a look and it seems ImGui::SetNextWindowPos is being called every frame with ImGuiCond_Always in RenderSceneHierarchy, which conflicts with ImGui’s native left-border resize behavior.

I’m planning to fix it by avoiding the position override while the window is being resized. Can this be assigned to me?

[Meakk]

@AnikethTS assigned.
Please note that a PR is already opened but stalled here: #3062