Inventory.cs

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

public class Inventory : MonoBehaviour {

    private Vector2 ScrollInventory = Vector2.zero;

    //All Items in game
    public List<Item> items = new List<Item>();

    //Player's Inventory
    [HideInInspector]
    public static List<Item> mainInventory = new List<Item>();

    //Equipped Apparel
    //[0] = Head, [1] = Body, [2] = Legs, [3] = Feet, [4] = Hand, [5] = Neck
    List<Item> equippedApparel = new List<Item>();
    //Equipped Weapons/Tools
    //[0] = Left Hand, [1] = Right Hand
    List<Item> equippedWeapons = new List<Item>();

    public GameObject player;

    string currentMenu = "";
    bool open = false;

    void Start() {
        mainInventory.Add (items [0]);
        mainInventory.Add (items [1]);
        mainInventory.Add (items [2]);
        mainInventory.Add (items [3]);
        mainInventory.Add (items [4]);
        mainInventory.Add (items [5]);
        mainInventory.Add (items [6]);
        mainInventory.Add (items [7]);
        mainInventory.Add (items [8]);
        mainInventory.Add (items [9]);
        mainInventory.Add (items [10]);
        mainInventory.Add (items [11]);
        //mainInventory.Add (items [12]);
    }

    void Update() {
        if(Input.GetKeyDown(KeyCode.E)) {
            if(open == false) {
                open = true;
                NavigateTo("Sel");
            } else {
                open = false;
                currentMenu = "";
            }
        }

        if(open == true) {
            player.GetComponent<FirstPersonController>().enabled = false;
            //player.GetComponent<BasicSettings>().enabled = false;
        } else {
            player.GetComponent<FirstPersonController>().enabled = true;
            //player.GetComponent<BasicSettings>().enabled = true;
            currentMenu = "";
        }
    }

    void OnGUI() {
        if(currentMenu == "Sel")
            InvenSelect();
        if(currentMenu == "Weap")
            InvenWeap();
        if(currentMenu == "Tool")
            InvenTool();
        if(currentMenu == "App")
            InvenApperal();
        if(currentMenu == "Food")
            InvenFood();
        if(currentMenu == "Misc")
            InvenMisc();

        /*GUI.Box(new Rect(0, 0, 200, Screen.height), "");
        ScrollInventory = GUILayout.BeginScrollView(ScrollInventory, GUILayout.MaxWidth(200));
        for(int x = 0;x < items.Count;x++) {
            if(GUILayout.Button("" + items[x].name)) {
                Debug.Log(items[x].desc);
            }
        }
        GUILayout.EndArea();*/
    }

    public void NavigateTo(string nextmenu) {
        currentMenu = nextmenu;
    }

    public void InvenSelect() {
        GUI.Box(new Rect(0, 0, 200, Screen.height), "Inventory");
        if(GUI.Button (new Rect(10, 30, 180, 30), "Weapons")) {
            NavigateTo("Weap");
        }
        if(GUI.Button (new Rect(10, 70, 180, 30), "Apperal")) {
            NavigateTo("App");
        }
        if(GUI.Button (new Rect(10, 110, 180, 30), "Tools")) {
            NavigateTo("Tool");
        }
        if(GUI.Button (new Rect(10, 150, 180, 30), "Food")) {
            NavigateTo("Food");
        }
        if(GUI.Button (new Rect(10, 190, 180, 30), "Misc.")) {
            NavigateTo("Misc");
        }
        if(GUI.Button (new Rect(10, Screen.height - 40, 180, 30), "Back")) {
            open = false;
        }
    }

    public void InvenWeap() {
        GUI.Box (new Rect(0, 0, 200, Screen.height), "Weapons");
        ScrollInventory = GUILayout.BeginScrollView(ScrollInventory, GUILayout.MaxWidth(200));
        GUILayout.Space(40);
            for(int x = 0;x < mainInventory.Count;x++) {
                if(mainInventory[x].type == ItemType.weapon) {
                    if(GUILayout.Button("" + mainInventory[x].name)) {
                        Debug.Log(mainInventory[x].desc);
                    }
                }
            }
        GUILayout.EndArea();
        if(GUI.Button (new Rect(10, Screen.height - 40, 180, 30), "Back")) {
            NavigateTo("Sel");
        }
    }

    public void InvenApperal() {
        GUI.Box (new Rect(0, 0, 200, Screen.height), "Apperal");
        ScrollInventory = GUILayout.BeginScrollView(ScrollInventory, GUILayout.MaxWidth(200));
        GUILayout.Space(40);
            for(int x = 0;x < mainInventory.Count;x++) {
                if(mainInventory[x].type == ItemType.head || mainInventory[x].type == ItemType.body || mainInventory[x].type == ItemType.legs || mainInventory[x].type == ItemType.feet || mainInventory[x].type == ItemType.hand || mainInventory[x].type == ItemType.neck) {
                    if(GUILayout.Button("" + mainInventory[x].name)) {
                        Debug.Log(mainInventory[x].desc);
                    }
                }
            }
        GUILayout.EndArea();
        if(GUI.Button (new Rect(10, Screen.height - 40, 180, 30), "Back")) {
            NavigateTo("Sel");
        }
    }

    public void InvenTool() {
        GUI.Box (new Rect(0, 0, 200, Screen.height), "Tools");
        ScrollInventory = GUILayout.BeginScrollView(ScrollInventory, GUILayout.MaxWidth(200));
        GUILayout.Space(40);
            for(int x = 0;x < mainInventory.Count;x++) {
                if(mainInventory[x].type == ItemType.tool) {
                    if(GUILayout.Button("" + mainInventory[x].name)) {
                        Debug.Log(mainInventory[x].desc);
                    }
                }
            }
        GUILayout.EndArea();
        if(GUI.Button (new Rect(10, Screen.height - 40, 180, 30), "Back")) {
            NavigateTo("Sel");
        }
    }

    public void InvenFood() {
        GUI.Box (new Rect(0, 0, 200, Screen.height), "Food");
        ScrollInventory = GUILayout.BeginScrollView(ScrollInventory, GUILayout.MaxWidth(200));
        GUILayout.Space(40);
            for(int x = 0;x < mainInventory.Count;x++) {
                if(mainInventory[x].type == ItemType.food) {
                    if(GUILayout.Button("" + mainInventory[x].name)) {
                        Debug.Log(mainInventory[x].desc);
                    }
                }
            }
        GUILayout.EndArea();
        if(GUI.Button (new Rect(10, Screen.height - 40, 180, 30), "Back")) {
            NavigateTo("Sel");
        }
    }

    public void InvenMisc() {
        GUI.Box (new Rect(0, 0, 200, Screen.height), "Misc");
        ScrollInventory = GUILayout.BeginScrollView(ScrollInventory, GUILayout.MaxWidth(200));
        GUILayout.Space(40);
            for(int x = 0;x < mainInventory.Count;x++) {
                if(mainInventory[x].type == ItemType.misc) {
                    if(GUILayout.Button("" + mainInventory[x].name)) {
                        Debug.Log(mainInventory[x].desc);
                    }
                }
            }
        GUILayout.EndArea();
        if(GUI.Button (new Rect(10, Screen.height - 40, 180, 30), "Back")) {
            NavigateTo("Sel");
        }
    }
}