Working on stats

Assets/Scripts/UI/StatsWindow.cs

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+using System.Collections.Generic;
+using UnityEngine;
+using SanAndreasUnity.Utilities;
+using System.Linq;
+
+namespace SanAndreasUnity.UI
+{
+
+	public class StatsWindow : PauseMenuWindow
+    {
+		int m_tabIndex = 0;
+
+
+		StatsWindow()
+        {
+			// set default parameters
+
+			this.windowName = "Stats";
+			this.useScrollView = true;
+
+		}
+
+		void Start ()
+        {
+			this.RegisterButtonInPauseMenu ();
+
+			// adjust rect
+			this.windowRect = Utilities.GUIUtils.GetCenteredRectPerc(new Vector2(0.8f, 0.8f));
+		}
+
+
+		protected override void OnWindowGUI ()
+		{
+            var categories = Stats.Categories.ToArray();
+            m_tabIndex = GUIUtils.TabsControl(m_tabIndex, categories);
+            if (m_tabIndex >= 0)
+            {
+                var stats = Stats.Entries.ElementAt(m_tabIndex).Value;
+                foreach (var stat in stats)
+                {
+                    if (!string.IsNullOrEmpty(stat.text))
+                        GUILayout.Label(stat.text);
+                    if (stat.onGUI != null)
+                        stat.onGUI();
+                }
+            }
+		}
+
+	}
+
+}

Assets/Scripts/Utilities/Stats.cs

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+using System.Collections.Generic;
+using System.Linq;
+
+namespace SanAndreasUnity.Utilities
+{
+    public class Stats
+    {
+        public class Entry
+        {
+            public string category = "";
+            public string text = null;
+            public System.Action onGUI = null;
+        }
+
+        static Dictionary<string, List<Entry>> s_entries = new Dictionary<string, List<Entry>>();
+        public static IEnumerable<KeyValuePair<string, List<Entry>>> Entries => s_entries;
+        public static IEnumerable<string> Categories => s_entries.Select(pair => pair.Key);
+
+
+        public static void RegisterStat(Entry entry)
+        {
+            if (s_entries.ContainsKey(entry.category))
+                s_entries[entry.category].Add(entry);
+            else
+                s_entries[entry.category] = new List<Entry>(){entry};
+        }
+
+    }
+}