Type `UnityEngine.VR.WSA.Input.GestureRecognizer' does not contain a definition for `HoldEvent'

abarsotti

I'm trying to implement a hold gesture in my application according to this document https://developer.microsoft.com/en-us/windows/holographic/gestures_in_unity yet when I attempt to attach a listener via:
gestureRecognizer.HoldEvent += GestureRecognizer_HoldEvent;

I get the error:
Type 'UnityEngine.VR.WSA.Input.GestureRecognizer' does not contain a definition for 'HoldEvent'

Intellisense isn't working in Visual Studio and there is no documentation for the GestureRecognizer class making this impossible to debug. Does anyone know if that property has been renamed?

HoloSheep

@abarsotti the page in the docs that you link to might be in need of an update.

I did a quick check in a basic project I have here that is based on the latest Unity HTP and intellisense (which works in my environment) is showing the following three events related to the hold gesture:

 gestureRecognizer.HoldStartedEvent += GestureRecognizer_HoldStartedEvent;
 gestureRecognizer.HoldCompletedEvent += GestureRecognizer_HoldCompletedEvent;
 gestureRecognizer.HoldCanceledEvent += GestureRecognizer_HoldCanceledEvent;

All three generated handler stubs show the same args:

   private void GestureRecognizer_HoldCanceledEvent(InteractionSourceKind source, Ray headRay)
    {
        throw new System.NotImplementedException();
    }

    private void GestureRecognizer_HoldCompletedEvent(InteractionSourceKind source, Ray headRay)
    {
        throw new System.NotImplementedException();
    }

    private void GestureRecognizer_HoldStartedEvent(InteractionSourceKind source, Ray headRay)
    {
        throw new System.NotImplementedException();
    }

HTH

HoloSheep

@abarsotti the page in the docs that you link to might be in need of an update.

I did a quick check in a basic project I have here that is based on the latest Unity HTP and intellisense (which works in my environment) is showing the following three events related to the hold gesture:

 gestureRecognizer.HoldStartedEvent += GestureRecognizer_HoldStartedEvent;
 gestureRecognizer.HoldCompletedEvent += GestureRecognizer_HoldCompletedEvent;
 gestureRecognizer.HoldCanceledEvent += GestureRecognizer_HoldCanceledEvent;

All three generated handler stubs show the same args:

   private void GestureRecognizer_HoldCanceledEvent(InteractionSourceKind source, Ray headRay)
    {
        throw new System.NotImplementedException();
    }

    private void GestureRecognizer_HoldCompletedEvent(InteractionSourceKind source, Ray headRay)
    {
        throw new System.NotImplementedException();
    }

    private void GestureRecognizer_HoldStartedEvent(InteractionSourceKind source, Ray headRay)
    {
        throw new System.NotImplementedException();
    }

HTH

abarsotti

After implementing these events I still can't get them to trigger. I have a simple script based off of the TapToPlaceParent script in the Hololens 101 tutorial:

` using UnityEngine;
using System.Collections;

    namespace HoloToolkit.Unity
    {
    public class HoldToPlaceParent : MonoBehaviour
    {

    bool placing = false;

    void OnHoldStart ()
    {
        if (SpatialMappingManager.Instance != null)
        {
            placing = true;
                SpatialMappingManager.Instance.DrawVisualMeshes = true;
        }
    }

    void OnHoldComplete ()
    {
        if (SpatialMappingManager.Instance != null)
        {
            placing = false;
                    SpatialMappingManager.Instance.DrawVisualMeshes = false;
        }
    }

    void Update ()
    {
        if (placing)
        {
            var headPosition = Camera.main.transform.position;
            var gazeDirection = Camera.main.transform.forward;

            RaycastHit hitInfo;

            if (Physics.Raycast(headPosition, gazeDirection, out hitInfo, 30.0f, SpatialMappingManager.Instance.LayerMask))
            {
                this.transform.parent.position = hitInfo.point;

                Quaternion toQuat = Camera.main.transform.localRotation;
                toQuat.x = 0;
                toQuat.z = 0;
                this.transform.parent.rotation = toQuat;
            }
        }
    }
    }
    }`

And I have that attached to a game object where a tap event is currently being used and triggering correctly. I've modified the HoloToolkit's GestureManager script to include the HoldStarted and HoldCompleted Events as follows:

gestureRecognizer.HoldStartedEvent += GestureRecognizer_HoldStartedEvent; gestureRecognizer.HoldCompletedEvent += GestureRecognizer_HoldCompletedEvent;

in the Start method,

` private void OnHoldStart()
{
if (focusedObject != null)
{
focusedObject.SendMessage("OnHoldStart");
}
}

    private void OnHoldComplete()
    {
        if (focusedObject != null)
        {
            focusedObject.SendMessage("OnHoldComplete");
        }
    }
    private void GestureRecognizer_HoldStartedEvent(InteractionSourceKind source, Ray headRay)
    {
        OnHoldStart();
    }

private void GestureRecognizer_HoldCompletedEvent(InteractionSourceKind source, Ray headRay)
    {
        OnHoldComplete();
    }`

implemented within the class, and then I'm deregistering the events in OnDestroy.