Debug Panel for Unity - To debug your variables more easily

DebugPanel.cs

using System.Collections.Generic;
using UnityEngine;

namespace SmartUnity.Debugs
{
	public class DebugPanel
	{
		#region Variables

		private static DebugPanel debugPanel;
		public static bool Instanciated { get { return debugPanel != null; } }

		private Dictionary<string, Dictionary<string, string>> logs = new Dictionary<string, Dictionary<string, string>>();
		public static Dictionary<string, Dictionary<string, string>> Logs { get { return debugPanel.logs; } }

		private bool changed = false;
		public static bool Changed { get { return debugPanel.changed; } }

		#endregion

		#region Instanciate and Clear Methods

		[RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
		public static void OnBeforeSceneLoad()
		{
			if(debugPanel == null)
				debugPanel = new DebugPanel();
		}

		public static void Clear()
		{
			debugPanel = new DebugPanel();
		}

		#endregion

		#region Log Methods

		public static void Log(string _key, object _value, string _group = "")
		{
#if UNITY_EDITOR
			if (!debugPanel.logs.ContainsKey(_group))
				debugPanel.logs[_group] = new Dictionary<string, string>();
			debugPanel.logs[_group][_key] = _value.ToString();
			debugPanel.changed = true;
#endif
		}

		#endregion
	}
}

DebugPanelWindow.cs

using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using System.Linq;

namespace SmartUnity.Debugs
{
	public class DebugPanelWindow : EditorWindow
	{
		#region Variables

		private static DebugPanelWindow debugPanelWindow;
		private Vector2 scrollViewPosition = Vector2.zero;
		private bool clearOnStop = true;
		private Dictionary<string, bool> groupDisplays = new Dictionary<string, bool>();

		// Style
		private bool guiStyleDefined = false;
		private GUIStyle groupStyle;

		#endregion

		#region Menu Item Methods

		[MenuItem("Window/Debug Panel", priority = 1100)]
		public static void ShowWindow()
		{
			debugPanelWindow = GetWindow<DebugPanelWindow>("Debug Panel");
			debugPanelWindow.titleContent = new GUIContent("Debug Panel", EditorGUIUtility.IconContent("CustomSorting").image);
			debugPanelWindow.Show();
		}
		
		#endregion
		
		#region Window Methods

		public void OnEnable()
		{

		}

		public void Update()
		{
			// Force repaint if it's in play
			if (EditorApplication.isPlaying && DebugPanel.Instanciated && DebugPanel.Changed)
				Repaint();
			//else if (!EditorApplication.isPlaying && DebugPanel.Instanciated && clearOnStop)
			//    DebugPanel.Clear();
		}

		public void OnGUI()
		{
			if (!EditorApplication.isPlaying && DebugPanel.Instanciated && clearOnStop)
				DebugPanel.Clear();

			// Manage GUIStyle
			if (!guiStyleDefined)
			{
				groupStyle = new GUIStyle(EditorStyles.foldout);
				groupStyle.fontStyle = FontStyle.Bold;
				guiStyleDefined = true;
			}

			GUILayout.BeginVertical();

			// Toolbar
			GUILayout.BeginHorizontal(EditorStyles.toolbar);

			// Clear
			if (GUILayout.Button("Clear", EditorStyles.toolbarButton, GUILayout.ExpandWidth(false)))
				ButtonClear();

			EditorGUILayout.Space();

			// Auto clear on stop
			clearOnStop = GUILayout.Toggle(clearOnStop, "Clear on Stop", EditorStyles.toolbarButton, GUILayout.ExpandWidth(false));

			GUILayout.FlexibleSpace();

			// Show all
			if (GUILayout.Button("Show All", EditorStyles.toolbarButton, GUILayout.ExpandWidth(false)))
				ButtonShowAll();

			// Hide all
			if (GUILayout.Button("Hide All", EditorStyles.toolbarButton, GUILayout.ExpandWidth(false)))
				ButtonHideAll();

			GUILayout.EndHorizontal();

			// Scroll view
			scrollViewPosition = GUILayout.BeginScrollView(scrollViewPosition);

			if (DebugPanel.Instanciated)
			{
				foreach (KeyValuePair<string, Dictionary<string, string>> group in DebugPanel.Logs.OrderBy(i => i.Key))
				{
					if (!groupDisplays.ContainsKey(group.Key))
						groupDisplays[group.Key] = true;

					if (group.Key != "")
						groupDisplays[group.Key] = EditorGUILayout.Foldout(groupDisplays[group.Key], group.Key, true, groupStyle);

					if (groupDisplays[group.Key])
					{
						foreach (KeyValuePair<string, string> log in group.Value)
							EditorGUILayout.LabelField(log.Key, log.Value);
					}
				}
			}

			GUILayout.EndScrollView();

			GUILayout.EndVertical();
		}

		#endregion

		#region Button Methods

		private void ButtonClear()
		{
			DebugPanel.Clear();
		}

		private void ButtonShowAll()
		{
			for (int i = 0; i < groupDisplays.Count; i++)
				groupDisplays[groupDisplays.ElementAt(i).Key] = true;
		}

		private void ButtonHideAll()
		{
			for (int i = 0; i < groupDisplays.Count; i++)
				groupDisplays[groupDisplays.ElementAt(i).Key] = false;
		}

		#endregion
	}
}