gistfile1.cs

using UnityEngine;
using System.Collections;

public class scriptScreenMainMenu : MonoBehaviour 
{
    public Transform GameManagerSpawn;
    private GameObject _gameManager;
    private string[] _currentMenu;
    private string[] _mainMenu;
    private string[] _optionsMenu;
    private string[] _videoMenu;
    private int _selectedIndex=0;
    private static float _selectionChangeDelay = 0.5f;
    private float _selectionCooldownTimer;
    private bool _keyboardActivateSelection = false;

    public string Version;

    void Start()
    {
        _gameManager = GameObject.FindWithTag("GameManager");
        if(_gameManager.GetComponent<scriptAudioManager>().ActiveTrack == null)
            _gameManager.GetComponent<scriptAudioManager>().PlaySong("pew2-title-draft4");

        _mainMenu = _currentMenu = new string[4] { "New Game", 
                                    "Tutorial", 
                                    "Options", 
                                    "Quit" };

        _optionsMenu = new string[3] { "1280 x 720", 
                                        "1920 x 1080", 
                                        "Back"};

        _videoMenu = new string[4] { "", 
                                     "", 
                                     "", 
                                     "" };
    }

    void Update()
    {
        float input = Input.GetAxis("VerticalMenu");
        if (Input.GetAxis("SelectMenu1") > 0)
            _keyboardActivateSelection = true;
        else
            _keyboardActivateSelection = false;

        if (input != 0 && _selectionCooldownTimer <= 0)
        {            
            if (input > 0)
                input = 1;
            else if (input < 0)
                input = -1;

            _selectedIndex -= (int)input;
            if (_selectedIndex < 0)
                _selectedIndex = _currentMenu.Length - 1;

            if (_selectedIndex > _currentMenu.Length - 1)
                _selectedIndex = 0;

            _selectionCooldownTimer = _selectionChangeDelay;
        }   
        else if (input == 0)
            _selectionCooldownTimer = 0;
        else
            _selectionCooldownTimer -= Time.deltaTime;
    }


    void OnGUI()
    {
        GUILayout.BeginArea(AspectUtility.screenRect);

        GUI.BeginGroup(new Rect(AspectUtility.screenWidth / 2 - 50, AspectUtility.screenHeight / 2 - 50, 300, 375));

        if (_currentMenu == _mainMenu)
        {
            GUI.Box(new Rect(0, 0, 100, 175), "Main Menu");

            GUI.SetNextControlName(_mainMenu[0]);
            if (GUI.Button(new Rect(10, 30, 80, 30), "Start Game") || (_keyboardActivateSelection && _selectedIndex == 0))
                _gameManager.GetComponent<scriptGameManager>().LoadLevel("ScreenLoad");

            GUI.SetNextControlName(_mainMenu[1]);
            if (GUI.Button(new Rect(10, 60, 80, 30), "Tutorial") || (_keyboardActivateSelection && _selectedIndex == 1))
                _gameManager.GetComponent<scriptGameManager>().LoadLevel("ScreenTutorial");

            GUI.SetNextControlName(_mainMenu[2]);
            if (GUI.Button(new Rect(10, 90, 80, 30), "Options") || (_keyboardActivateSelection && _selectedIndex == 2))
                ChangeMenu(_optionsMenu);

            GUI.SetNextControlName(_mainMenu[3]);
            if (GUI.Button(new Rect(10, 120, 80, 30), "Exit") || (_keyboardActivateSelection && _selectedIndex == 3))
                _gameManager.GetComponent<scriptGameManager>().ToggleQuitPrompt();
            
        }
        else if (_currentMenu == _optionsMenu)
        {
            GUI.SetNextControlName(_optionsMenu[0]);
            if (GUI.Button(new Rect(10, 30, 100, 30), "1280 x 720") || (_keyboardActivateSelection && _selectedIndex == 0))
            {
                Screen.SetResolution(1280, 720, true);
                AspectUtility.SetCamera();
            }
            GUI.SetNextControlName(_optionsMenu[1]);
            if (GUI.Button(new Rect(10, 60, 100, 30), "1920 x 1080") || (_keyboardActivateSelection && _selectedIndex == 1))
            {
                Screen.SetResolution(1920, 1080, true);
                AspectUtility.SetCamera();
            }
            GUI.SetNextControlName(_optionsMenu[2]);
            if (GUI.Button(new Rect(10, 120, 100, 30), "Back") || (_keyboardActivateSelection && _selectedIndex == 2))
            {                
                ChangeMenu(_mainMenu);
            }
        }
        else if (_currentMenu == _videoMenu)
        {

        }
        if(_selectedIndex >=0)
            GUI.FocusControl(_currentMenu[_selectedIndex]);
        GUI.EndGroup();

        GUI.BeginGroup(new Rect(AspectUtility.screenWidth / 2 - 150, AspectUtility.screenHeight / 2 + 130, 300, 400));
        _gameManager.GetComponent<scriptGameManager>().scoreManager.DisplayHighScores();
        GUI.EndGroup();

        
        GUI.Label(new Rect(AspectUtility.screenWidth - 200, AspectUtility.screenHeight - 20, 200, 25), "Build Version: " + Version);
        GUILayout.EndArea();
    }

    private void ChangeMenu(string[] nextMenu)
    {
        _currentMenu = nextMenu;
        _selectedIndex = -1;

        //Faking a remove button focus function
        GUI.SetNextControlName("Deselect");
        GUI.Button(new Rect(0, 0, 0, 0), "");
        GUI.FocusControl("Deselect");
    }
}