Text system that updates much like a MMO chat. Can be called and updated by any game event.

TextFeedManager.cs

////////////////////////////////////////////////////////////////////////////////
//	Authors: Kaila Harris
//	Copyright © 2016 DigiPen (USA) Corp. and its owners. All Rights Reserved.
////////////////////////////////////////////////////////////////////////////////

// goes on UI text that it will update
using UnityEngine;
using UnityEngine.UI;
using System.Collections.Generic;

[RequireComponent(typeof(Text))]
public class TextFeedManager : MonoBehaviour
{
    public Text textField;
    public bool ClearOnMouseExit = false;

    List<string> infoText;
    string infoDisplayed;
    int lineLimit = 5;
    
    string preline, postline;

    AudioSource textAudio;
    

    void Awake()
    {
        if (textField == null)
            textField = GetComponent<Text>();

        infoText = new List<string>();
        infoDisplayed = "";
    }

    // Use this for initialization
    void Start ()
    {
        textAudio = gameObject.GetComponent<AudioSource>();
    }

    public void SetTextSystem(int _lineLimit)
    {
        lineLimit = _lineLimit;
    }

    public void SetTextSystem(int _lineLimit, string _preline)
    {
        lineLimit = _lineLimit;
        preline = _preline;
    }

    public void SetTextSystem(int _lineLimit, string _preline, string _postilne)
    {
        lineLimit = _lineLimit;
        preline = _preline;
        postline = _postilne;
    }
    
    public void AddDataToFeed(string _info)
    {
        infoText.Add(_info);
        UpdateInfoFeed();
    }

    public void AddDataToFeed(string _info, int _index)
    {
        infoText[_index] = _info;
        UpdateInfoFeed();
    }

    public void ClearFeed()
    {
        infoText.Clear();
        UpdateInfoFeed();
    }

    void UpdateInfoFeed()
    {
        CreateNewFeed();
        textField.text = infoDisplayed;
        if (textAudio != null)
            textAudio.Play();
    }

    void CreateNewFeed()
    {
        while (infoText.Count > lineLimit)
            infoText.RemoveAt(0);

        infoDisplayed = "";
        foreach (string str in infoText)
            infoDisplayed += string.Concat(preline, str, postline, "\n");
    }

    private void OnMouseExit()
    {
        if(ClearOnMouseExit)
        {
            foreach (string str in infoText)
                infoDisplayed += string.Concat("", "\n");
        }
    }

    void OnDestroy()
    {
        textField = null;
        infoText.Clear();
    }


    void Test()
    {
        infoText.Add("hello world!");
        infoText.Add("this");
        infoText.Add("is");
        infoText.Add("a");
        infoText.Add("test");
    }
}