Unity_delegate_tutorial_4.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

// We need to add the Unity.UI library to access UI elements.
using UnityEngine.UI;

/// <summary>
/// This class is in charge of 
/// </summary>
public class UIController : MonoBehaviour
{
    // UI elements
    public Button ButtonSendMessage;
    public InputField InputField;
    public Text MessageDisplay;

    // Use this for initialization
    void Start()
    {
	// Subscribe our 'SendMessageUpdateRequest' method to ButtonSendMessage onClick events
	// Therefore: everytime we click on the button, 'SendMessageUpdateRequest' will be called
	ButtonSendMessage.onClick.AddListener(SendMessageUpdateRequest);

	// Also, subscribe our 'UpdateMessage' method to listen for OnMessageUpdateRequest calls
	EventController.OnMessageUpdateRequest += UpdateMessage;
    }

    void SendMessageUpdateRequest()
    {
	// Store the input field's text into a string
	string message = InputField.text;
	
	// Call the 'Event_OnMessageUpdateRequest' static method from the EventController class
	EventController.Event_OnMessageUpdateRequest(message);
    }

    void UpdateMessage(string _message)
    {
	// Print the message
	Debug.LogFormat("-- UIController // Updating message: {0}", _message);

	// Replace the current message with the contents of the _message string
	MessageDisplay.text = _message;

	// Reset the text of our input field
	InputField.text = "";
    }
}