(4.0) Can Tween container greyed out properties, but can't animate them using AnimationPlayer or change them in Editor

[seppoday]

Godot version

4.0 1 alpha

System information

Windows 11

Issue description

Hello. I noticed that there is a problem with consistency with positioning control nodes. That's kinda confusing and probably prone to bugs.

1. In Editor I can't change control child nodes rect_position:
   
2. In Animaton Player I also cannot do it:
   
3. But using Tween I can:
   

Steps to reproduce

Try changing control node position in those 3 ways.

Minimal reproduction project

No response

[Calinou]

Controls within containers cannot be moved manually, as their position will be reset every time the container is updated (e.g. when new elements are added). This was always the case in Godot, but it's made more obvious in master thanks to #30623.

I guess we could display a message when a tween tries to set a rect_ property on a Control node within a container. This check isn't cheap, so it would only be done in debug builds.

[seppoday]

Isn't it kinda weird that you can change control rect_position using tween, but not by using Animation Player? I understand that you can't change it in editor. But Tween and Animation Player difference is kinda weird I guess?

[Calinou]

Isn't it kinda weird that you can change control rect_position using tween, but not by using Animation Player? I understand that you can't change it in editor. But Tween and Animation Player difference is kinda weird I guess?

The Tween change happens via code, while #30623 only affects the editor. There is currently no mechanism in place to detect changes done to Controls by code (when they're managed by a parent container).

[TheDuriel]

I guess we could display a message when a tween tries to set a rect_ property on a Control node within a container. This check isn't cheap, so it would only be done in debug builds.

Really not worth it. There are cases in which you want to do this for legitimate reasons, like animating your UI- And then letting containers take over once you're done.

[seppoday]

In my case I was happy that I could animate node via code. I was just supprised that Animation Player way didn't work. So @Calinou we can probably close this one. Sorry for adding unnecesary issue. Still learning engine and just trying to help :)