Hololens V1 – Xbox Controller

Import HoloToolkit 2017.4.3.0
Menu : Mixed Reality Toolkit > Configure > Apply Mixed Reality Project Setting > Check “Use Toolkit-specific InputManager axes”

using System;
using HoloToolkit.Unity.InputModule;


public class XboxControllerInputHandle : XboxControllerHandlerBase
{
    public event Action On_Y_ButtonPressed = delegate { };
    public event Action On_B_ButtonPressed = delegate { };
    public event Action On_X_ButtonPressed = delegate { };

    public override void OnXboxInputUpdate(XboxControllerEventData eventData)
    {
        base.OnXboxInputUpdate(eventData);

        //XboxA_Down overlap with the default select
        if (eventData.XboxY_Down) 
        {
            On_Y_ButtonPressed();
        }
        if (eventData.XboxB_Down)
        {
            On_B_ButtonPressed();
        }
        if (eventData.XboxX_Down)
        {
            On_X_ButtonPressed();
        }
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DrawLineByPoints : MonoBehaviour
{
    private LineRenderer lr;
    private List<Vector3> points;
    public bool visible { get; private set; }

    private void Awake()
    {
        visible = true;
        lr = GetComponent<LineRenderer>();
        points = new List<Vector3>();
    }

    public void Hide()
    {
        visible = false;
        gameObject.SetActive(false);
    }
    public void Show()
    {
        visible = true;
        gameObject.SetActive(true);
    }

    public void SetUpLine(List<Vector3> points)
    {
        lr.positionCount = points.Count;
        this.points = points;
    }

    private void Update()
    {
        for(int i=0;i<points.Count;i++)
        {
            lr.SetPosition(i,points[i]);
        }
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using HoloToolkit.Unity.InputModule;

public class PointAdding : MonoBehaviour
{
    private List<Vector3> positions;
    [SerializeField] private DrawLineByPoints line;
    [SerializeField] private XboxControllerInputHandle XBoxInputHandleScript;

    void Start()
    {
        positions = new List<Vector3>();
        InputManager.Instance.PushFallbackInputHandler(gameObject);

        XBoxInputHandleScript.On_Y_ButtonPressed += Handle_Y_ButtonPressed;
        XBoxInputHandleScript.On_B_ButtonPressed += Handle_B_ButtonPressed;
        XBoxInputHandleScript.On_X_ButtonPressed += Handle_X_ButtonPressed;
    }

    private void Handle_Y_ButtonPressed()
    {
        if(line.visible) line.Hide();
        else line.Show();
    }
    private void Handle_B_ButtonPressed()
    {
        Vector3 hitPoint = GazeManager.Instance.HitPosition;
        positions.Add(hitPoint);
        Debug.Log("Click on " + hitPoint.ToString());
        line.SetUpLine(positions);
    }

    private void Handle_X_ButtonPressed()
    {
        positions.Clear();
        line.SetUpLine(positions);
    }
}

Press B : add new point for drawing a line
Press X : remove all points
Press Y : Show/Hide the line
Note that the A button is a select action by default.