Attaching Axis Gizmo widget at Anim Notify?

Hello.

In my project, there is “Paricle Effect Notify” for triggering some special effect in
Anim montage asset.

In Particle Notify, it has a member value called “offset location(FVector)” for modify its position.

I could type some X Y Z float values for setting position, however I want to spawn Gizmo widget to adjust position by mouse clicking and dragging.

I have found that default gizmo widget class is located at /Source/Editor/UnrealEd/Public/UnrealWidget.h

however it occurs an linking error 2019 even I attach UnrealEd module.
I’d like to know if there’s a solution or alternative to this.

Thank you.