The PictureAction component, which should send an action-command to the PictureController when clicked will be added to the object. Create a new C# script in your Scripts folder named PictureAction and open it for editing. You will see the following:

File: PictureAction.cs
using UnityEngine; 
using HoloToolkit.Unity.InputModule; 
 
public class PictureAction : MonoBehaviour, IInputClickHandler { 
    public PictureCommand command; 
    protected PictureController picture; 
 
    void Start() { 
        picture = GetComponentInParent<PictureController>(); 
    } 
 
    public void OnInputClicked(InputClickedEventData eventData) { 
        picture.Execute(command); 
    } 
} 

The PictureAction responds to OnInputClicked events. Using a HoloLens, these events are generated when it recognizes the user doing a finger-thumb pinch select gesture. The Start() function finds the parent PictureController. Then, when a user clicks, it simply sends its command to the controller.