Editor Window Edit property of items in a list

Question

Hello, need a bit of help I have a script that serve as manager for items in my game I'm trying to make a custom editor window to display in a list only the item with that manager script. And I want to be able to edit the properties of that script on each item, from that window.

I thought ReorderableList would be the solution, but after hours trying I'm getting nowhere and I don't understand half of what I'm doing, following scattered tutorials left and right. Ideally I want this http://va.lent.in/content/images/2014/Jun/list_2.png But I've no idea how to get to this

This is my Manager script

 using UnityEngine;
 using System.Collections;
 using System;
 
 [Serializable]
 public enum CubeGroups {Red, Boing, Black, Green, Roll, Spawner}
 
 public class CubeManager : MonoBehaviour {
 
     public bool startCube;
     public CubeGroups myGroup;
 
     [Header("Smaller Number means longer life")]
     public float lifeTime;
     
     static public float _chrono;
 
     void Start(){
                 _chrono = 25;
         }
 
         void Update(){
 
         _chrono -= Time.deltaTime;
         if (_chrono < 0) {
             transform.tag = "Cube";
         }
         if (!startCube) {
         
             float _a = GetComponent<MeshRenderer> ().material.color.a;
             _a  -= (lifeTime * Time.deltaTime);
             GetComponent<MeshRenderer> ().material.color = new Color (GetComponent<MeshRenderer> ().material.color.r, GetComponent<MeshRenderer> ().material.color.g, GetComponent<MeshRenderer> ().material.color.b, _a);
             if (_a <= 0) {
                 Destroy (this.gameObject);
             }
         }
             
     }
     
 }

And this is my attempt at editor window

 using UnityEngine;
 using System.Collections;
 using UnityEditor;
 using UnityEditorInternal;
 
 public class CubeWindow : EditorWindow {
 
     CubeManager[] cubemag = (CubeManager[])FindObjectsOfType (typeof(CubeManager));
 
     [MenuItem ("Window/Cube Window")]
 
     public static void  ShowWindow () {
         EditorWindow.GetWindow(typeof(CubeWindow));
     }           
 
        void OnGUI() {
 
         GUILayout.Label ("List of Cubes", EditorStyles.boldLabel);
 
         cubemag = (CubeManager[])FindObjectsOfType (typeof(CubeManager));
         for(int i = 0; i < cubemag.Length; i++)
         {
             cubemag[i] = (CubeManager)EditorGUILayout.ObjectField(cubemag[i], typeof(CubeManager));
         }       
     }
 }

If anyone know how to do so, and can explain me with a simple step-by-step because I've never fiddled with Unity gui before so I'm completely lost...

Answer 1

Well I got it to display for you, the rest is up to you :P

CubeWindow

 using UnityEngine;
 using System.Collections;
 using UnityEditor;
 using System.Collections.Generic;
 
 public class CubeWindow : EditorWindow //Deriving from editor window to get window and GUI elements.
 {
 
     private CubeManager[] Cubemag; //Obiously your array of target objects
     [MenuItem("Window/Cube Window")] //Declaring to Unity engine that this is meant as a menu item.
     public static void ShowWindow() //Telling unity what MenuItem - "WIndowCube" does.
     {
         EditorWindow cubeWindow = EditorWindow.GetWindow(typeof(CubeWindow)); //Getting our window for unity to use.
         GUIContent titlecontent = new GUIContent("Cube Window"); //Creating some title content.
         cubeWindow.titleContent = titlecontent; //Setting the title content to the window.
         cubeWindow.maxSize = new Vector2(300, 500); //Declaring the max size of the window.
         cubeWindow.minSize = new Vector2(300, 500); //Declaring the min size of the window.
         cubeWindow.ShowPopup(); //Showing our window as a Popup, I.E., a default editor style.
     }
 
 
     void OnGUI() //OnGUI gets called like an Update... very very often, avoid making large data collection calls here.
     {
         EditorGUILayout.BeginVertical(EditorStyles.helpBox); //Declaring our first part of our layout, and adding a bit of flare with EditorStyles.
 
         GUILayout.Label("List of Cubes", EditorStyles.boldLabel); //Making a label in our vertical view, declaring its contents, and adding editor flare.
 
         Cubemag = FindObjectsOfType<CubeManager>(); //Collecting our cube info, I suggest finding a way to do this outside of OnGUI.
         for (int i = 0; i < Cubemag.Length; i++) //Your loop to display the objects, THIS must exist in OnGUI.
         {
             if (Cubemag[i] != null) //Preventing null errors if the objects are removed.
             {
                 Cubemag[i] = (CubeManager)EditorGUILayout.ObjectField(Cubemag[i], typeof(CubeManager), true); //Declaring our object as an object field, with the type of object we want, and allowing scene object.
                 EditorGUILayout.BeginHorizontal(); //Adding a horizontal view to indent our next line so that the properties look like children, LOTS of things you can add like toggles and stuff to reduce this clutter.
                 GUILayout.Space(15); //The indent for our next line, in pixels.
                 Cubemag[i].lifeTime = EditorGUILayout.FloatField("Life Time", Cubemag[i].lifeTime); //the lifeTime property of cubemap can be assigned to a GUI element here.
                 EditorGUILayout.EndHorizontal(); //All layout areas must be closed like this.
 
             }
         }
         EditorGUILayout.EndVertical(); // And closing our last area.
 
     }
 }

Editor Window Edit property of items in a list

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