How do I create a custom 3d text editor? Unity UI

Can anyone help me create a script that I can edit 3d text via UI?

An example for the idea of help:

 

Lets already created here is:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using UnityEngine.UI;
4. public class Editordetexto3d : MonoBehaviour {
5.  
6.     public InputField inputField;
7.     public TextMesh myText;
8.  
9.     public void ButtonClick(){
10.         myText.text="" + inputField.text+ "";
11.     }
12. }