Change from mouse click to free space to a canvas button

Hello, I have a script problem that is not resolved, I want t$$anonymous$$s script to keep the object at hand without holding down the left mouse button and that only works by giving a button on a canvas and pressing that button again I dropped the object I had in hand, I hope to answer.

Here the script:

 using UnityEngine;
 using System.Collections;
 
 public class CarryObject : MonoBehaviour
 {
     public float interactDistance = 3;
     public float carryDistance = 2.5f;
     public LayerMask interactLayer;
 
     private Transform carryObject;
     private bool haveObject;
 
     void Update()
     {
         //Raycast variables.
         Ray ray = new Ray(Camera.main.transform.position, Camera.main.transform.forward);
         RaycastHit $$anonymous$$t;
 
         //Raycasting mechanics.
         if (Physics.Raycast(ray, out $$anonymous$$t, interactDistance, interactLayer))
         {
             //If we press LMB, it will update the carryObject and its gravity.
             if (Input.GetMouseButtonDown(0))
             {
                 carryObject = $$anonymous$$t.transform;
                 carryObject.GetComponent<Rigidbody>().useGravity = false;
                 haveObject = true;
             }
         }
 
         //If we release LMB and we have an object in hand, it will reset the carryObject.
         if (Input.GetMouseButtonUp(0))
         {
             if (haveObject)
             {
                 haveObject = false;
                 carryObject.GetComponent<Rigidbody>().useGravity = true;
                 carryObject = null;
             }
         }
 
         //If we have an object in hand, we update its position and smooth it out with basic interpolation.
         if (haveObject)
         {
             carryObject.position = Vector3.Lerp(carryObject.position, Camera.main.transform.position + Camera.main.transform.forward * carryDistance, Time.deltaTime * 8);
             carryObject.GetComponent<Rigidbody>().velocity = Vector3.zero;
         }
     }
 }