UniversalViewer/Assets/Scripts/ModelViewerBase/UI/Handles/UIHandleMain.cs

using UnityEditor;
using UnityEngine;

public class UIHandleMain : UIHandle
{
    public static UIHandleMain CreateAsChild(ObjectContainer owner)
    {
        var handle = CreateAsChild<UIHandleMain>(owner.transform);
        handle.Init(owner).SetColor(Color.yellow).SetScale(1.5f);
        return handle;
    }

    public override UIHandle Init(ObjectContainer owner)
    {
        base.Init(owner);

        Popup.AddButton("Reset All", TransformResetAll);
        Popup.AddButton("Reset Position", TransformResetPosition);
        Popup.AddButton("Reset Rotation", TransformResetRotation);
        Popup.AddButton("Reset Scale", TransformResetScale);
        Popup.AddButton("Reset Children", ResetBones);
        Popup.AddButton("Delete", () => Destroy(Owner));

        return this;
    }

    public void ResetBones()
    {
        using (var context = new KeyframeToggleContext(Owner, false))
        {
            foreach (var bone in Owner.GetComponentsInChildren<UIHandle>())
            {
                bone.TransformResetAll();
            }
        }
        Owner.SetKeyframe();
    }

    protected override bool ShouldBeHidden()
    {
        return _forceDisplayOff || !HandleManager.Instance.EnabledHandles.Contains(SerializableBone.BoneTags.Root);
    }
}