UI 4.6 input field how do I use the .onendedit?

I would like my input field to stop accepting further edits after the user has pressed return or mouse clicked away from the input field.

I assume I have to add a function to the .onendedit property but I am not sure how to do this?

Example code is as follows, with the input text in the middle.

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 using UnityEngine.EventSystems;
 
 public class CreateCanvasButton : MonoBehaviour {
 
 
 
 
     void Start () {
         // create event system
         GameObject eventsystem = new GameObject ();
         eventsystem.AddComponent<EventSystem> ();
         eventsystem.AddComponent<StandaloneInputModule> ();
         eventsystem.AddComponent<TouchInputModule> ();
 
 
         string name = "Canvas";
 
         GameObject newCanvasGO = new GameObject ();
         newCanvasGO.name = name;
         newCanvasGO.transform.SetParent (this.transform);
         newCanvasGO.AddComponent <Canvas>();
         newCanvasGO.AddComponent<CanvasScaler> ();
         newCanvasGO.AddComponent<GraphicRaycaster> ();
 
         RectTransform theCanvasRectTransform = newCanvasGO.GetComponent<RectTransform> ();
         theCanvasRectTransform.anchoredPosition3D = new Vector3 (0f, 0f, 0f);
         theCanvasRectTransform.sizeDelta = new Vector2 (2400f,3800f);
         theCanvasRectTransform.anchorMin = new Vector2 (0f,0f);
         theCanvasRectTransform.anchorMax = new Vector2 (1f,1f);
         theCanvasRectTransform.localScale = new Vector3 (0.0005f,0.0005f,1f);
         theCanvasRectTransform.localPosition = new Vector3 (0f, 2.9f, 0f);
         Canvas theCanvas = newCanvasGO.GetComponent<Canvas> ();
         theCanvas.worldCamera = Camera.main;
         newCanvasGO.SetActive (true);
         newCanvasGO.AddComponent<Image> ();
         Image canvasImage = newCanvasGO.GetComponent<Image> ();
         Sprite mySprite = Resources.Load<Sprite> ("Background");
         canvasImage.sprite = mySprite;
         canvasImage.type = Image.Type.Sliced;
         // create name title text
         GameObject titleTextGO = new GameObject ();
         titleTextGO.name = "Name_text";
         titleTextGO.transform.parent = newCanvasGO.transform;
         Text titleText = titleTextGO.AddComponent<Text> ();
         RectTransform titleTextRT = titleTextGO.GetComponent<RectTransform> ();
         titleTextRT.anchoredPosition3D = new Vector3 (0f,0f,0f);
         titleTextRT.sizeDelta = new Vector2 (877,199);
         titleTextRT.localPosition = new Vector3 (-22f,1722f,0f);
         titleTextRT.localScale = new Vector3 (1f, 1f, 1f);
         titleText.text = "Title";
         Font theFont = Resources.GetBuiltinResource<Font> ("Arial.ttf");
         titleText.font = theFont;
         titleText.fontSize = 140;
         titleText.color = Color.black;
         titleText.alignment = TextAnchor.MiddleCenter;
         titleText.resizeTextForBestFit = true;
         titleText.resizeTextMinSize = 10;
         titleText.resizeTextMaxSize = 160;
         // create nickname title text
         GameObject TextGO = new GameObject ();
         TextGO.name = "InputField";
         TextGO.transform.parent = newCanvasGO.transform;
         TextGO.AddComponent<RectTransform> ();
         RectTransform TextRT = TextGO.GetComponent<RectTransform> ();
         TextGO.AddComponent<InputField> ();
         InputField myInput = TextGO.GetComponent<InputField> ();
         TextRT.anchoredPosition3D = new Vector3 (0f,0f,0f);
         TextRT.sizeDelta = new Vector2 (1669,3370);
         TextRT.localPosition = new Vector3 (-35f,-188f,0f);
         TextRT.localScale = new Vector3 (1f, 1f, 1f);
         myInput.transition = Selectable.Transition.None;
         myInput.text = "SomeText that never appears";
 
 
         //myInput.onEndEdit (myEndEdit()); // this line doens't work
         
         
         GameObject textForInputGO = new GameObject ();
         textForInputGO.name = "Text_ForInputField";
         textForInputGO.transform.SetParent(TextGO.transform);
         RectTransform textRT = textForInputGO.AddComponent<RectTransform> ();
         Text textscript = textForInputGO.AddComponent<Text>();
         textRT.sizeDelta = new Vector2 (1356f,300f);
         textRT.localPosition = new Vector3 (0f,-0f,0f);
         textRT.localRotation = new Quaternion (0f, 0f, 0f, 0f);
         textRT.localScale = new Vector3 (1f,1f,1f);
         myInput.textComponent = textscript;
         textscript.supportRichText = false;
         textscript.resizeTextForBestFit = true;
         textscript.resizeTextMaxSize = 300;
         textscript.resizeTextMinSize = 10;
         textscript.font = theFont;
         textscript.text = "This is the main body text.";
         textscript.color = Color.black;
         textscript.alignment = TextAnchor.MiddleCenter;
         
 
         // create button
         GameObject invisibleButtonGO = new GameObject ();
         invisibleButtonGO.name = "invisibleButton";
         invisibleButtonGO.transform.parent = newCanvasGO.transform;
         invisibleButtonGO.AddComponent<RectTransform> ();
         RectTransform invisibleButtonRT = invisibleButtonGO.GetComponent<RectTransform> ();
         invisibleButtonRT.anchoredPosition3D = new Vector3 (0f,0f,0f);
         invisibleButtonRT.sizeDelta = new Vector2 (358,354);
         invisibleButtonRT.localPosition = new Vector3 (1021f,-1723f,0f);
         invisibleButtonRT.localScale = new Vector3 (1f, 1f, 1f);
         invisibleButtonGO.AddComponent<Button> ();
         Button invisibleButton = invisibleButtonGO.GetComponent<Button> ();
         invisibleButton.transition = Selectable.Transition.None;
         invisibleButton.onClick.AddListener (() => handleButton());
 
         //add image for ray casting invisable button:
         Image image = invisibleButtonGO.AddComponent<Image>();
         image.color = new Color(0, 0, 0, 0);
 
     }
 
     void handleButton (){
         print ("pressed!");
         }
 
     public void myEndEdit(string thestring){
         print (thestring);
         // I want to call this method on submission or clicking off the input field and stop the input field from picking up more 
         // key presses until it is clicked again.
     }
 
 }