//-------------------------------------------------
//			  NGUI: Next-Gen UI kit
// Copyright © 2011-2019 Tasharen Entertainment Inc
//-------------------------------------------------

using UnityEngine;
using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;

public class DoNotObfuscateNGUI : Attribute { }

/// <summary>
/// Helper class containing generic functions used throughout the UI library.
/// </summary>

static public class NGUITools
{
	[System.NonSerialized] static AudioListener mListener;

	/// <summary>
	/// Audio source used to play UI sounds. NGUI will create one for you automatically, but you can specify it yourself as well if you like.
	/// </summary>

	[System.NonSerialized] static public AudioSource audioSource;

	static bool mLoaded = false;
	static float mGlobalVolume = 1f;

	/// <summary>
	/// Globally accessible volume affecting all sounds played via NGUITools.PlaySound().
	/// </summary>

	static public float soundVolume
	{
		get
		{
			if (!mLoaded)
			{
				mLoaded = true;
				mGlobalVolume = PlayerPrefs.GetFloat("Sound", 1f);
			}
			return mGlobalVolume;
		}
		set
		{
			if (mGlobalVolume != value)
			{
				mLoaded = true;
				mGlobalVolume = value;
				PlayerPrefs.SetFloat("Sound", value);
			}
		}
	}

	/// <summary>
	/// Helper function -- whether the disk access is allowed.
	/// </summary>

	static public bool fileAccess
	{
		get
		{
#if !UNITY_4_7
			if (Application.platform == RuntimePlatform.WebGLPlayer) return false;
#endif
#if UNITY_4_7 || UNITY_5_0 || UNITY_5_1 || UNITY_5_2 || UNITY_5_3
			return Application.platform != RuntimePlatform.WindowsWebPlayer &&
				Application.platform != RuntimePlatform.OSXWebPlayer;
#else
			return true;
#endif
		}
	}

	/// <summary>
	/// Play the specified audio clip.
	/// </summary>

	static public AudioSource PlaySound (AudioClip clip) { return PlaySound(clip, 1f, 1f); }

	/// <summary>
	/// Play the specified audio clip with the specified volume.
	/// </summary>

	static public AudioSource PlaySound (AudioClip clip, float volume,bool bInGame = false) { return PlaySound(clip, volume, 1f, bInGame); }

	static float mLastTimestamp = 0f;
	static AudioClip mLastClip;

	/// <summary>
	/// Play the specified audio clip with the specified volume and pitch.
	/// </summary>

	static public AudioSource PlaySound (AudioClip clip, float volume, float pitch, bool bInGame = false)
	{
        //if (!OptionManager.Instance.m_Sound) return null;

        //if (bInGame && SoundManager.Instance.bMenu)
            //return null;

		float time = RealTime.time;
		if (mLastClip == clip && mLastTimestamp + 0.1f > time) return null;

		mLastClip = clip;
		mLastTimestamp = time;
		volume *= soundVolume;

		if (clip != null && volume > 0.01f)
		{
			if (mListener == null || !NGUITools.GetActive(mListener))
			{
				AudioListener[] listeners = GameObject.FindObjectsOfType(typeof(AudioListener)) as AudioListener[];

				if (listeners != null)
				{
					for (int i = 0; i < listeners.Length; ++i)
					{
						if (NGUITools.GetActive(listeners[i]))
						{
							mListener = listeners[i];
							break;
						}
					}
				}

				if (mListener == null)
				{
#if W2
					var cam = MainCamera.instance;
#else
					var cam = Camera.main;
#endif
					if (cam == null) cam = GameObject.FindObjectOfType(typeof(Camera)) as Camera;
					if (cam != null) mListener = cam.gameObject.AddComponent<AudioListener>();
				}
			}

			if (mListener != null && mListener.enabled && NGUITools.GetActive(mListener.gameObject))
			{
				if (!audioSource)
				{
#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7
					audioSource = mListener.audio;
#else
					audioSource = mListener.GetComponent<AudioSource>();
#endif
					if (audioSource == null) audioSource = mListener.gameObject.AddComponent<AudioSource>();
				}

#if !UNITY_FLASH
				audioSource.priority = 50;
				audioSource.pitch = pitch;
#endif
				audioSource.PlayOneShot(clip, volume);
				return audioSource;
			}
		}
		return null;
	}

	/// <summary>
	/// New WWW call can fail if the crossdomain policy doesn't check out. Exceptions suck. It's much more elegant to check for null instead.
	/// </summary>

//	  static public WWW OpenURL (string url)
//	  {
//#if UNITY_FLASH
//		  Debug.LogError("WWW is not yet implemented in Flash");
//		  return null;
//#else
//		  WWW www = null;
//		  try { www = new WWW(url); }
//		  catch (System.Exception ex) { Debug.LogError(ex.Message); }
//		  return www;
//#endif
//	  }

//	  /// <summary>
//	  /// New WWW call can fail if the crossdomain policy doesn't check out. Exceptions suck. It's much more elegant to check for null instead.
//	  /// </summary>

//	  static public WWW OpenURL (string url, WWWForm form)
//	  {
//		  if (form == null) return OpenURL(url);
//#if UNITY_FLASH
//		  Debug.LogError("WWW is not yet implemented in Flash");
//		  return null;
//#else
//		  WWW www = null;
//		  try { www = new WWW(url, form); }
//		  catch (System.Exception ex) { Debug.LogError(ex != null ? ex.Message : "<null>"); }
//		  return www;
//#endif
//	  }

	/// <summary>
	/// Same as Random.Range, but the returned value is between min and max, inclusive.
	/// Unity's Random.Range is less than max instead, unless min == max.
	/// This means Range(0,1) produces 0 instead of 0 or 1. That's unacceptable.
	/// </summary>

	static public int RandomRange (int min, int max)
	{
		if (min == max) return min;
		return UnityEngine.Random.Range(min, max + 1);
	}

	/// <summary>
	/// Returns the hierarchy of the object in a human-readable format.
	/// </summary>

	static public string GetHierarchy (GameObject obj)
	{
		if (obj == null) return "";
		string path = obj.name;

		while (obj.transform.parent != null)
		{
			obj = obj.transform.parent.gameObject;
			path = obj.name + "\\" + path;
		}
		return path;
	}

	/// <summary>
	/// Find all active objects of specified type.
	/// </summary>

	static public T[] FindActive<T> () where T : Component
	{
		return GameObject.FindObjectsOfType(typeof(T)) as T[];
	}

	/// <summary>
	/// Find the camera responsible for drawing the objects on the specified layer.
	/// </summary>

	static public Camera FindCameraForLayer (int layer)
	{
		int layerMask = 1 << layer;

		Camera cam;

		for (int i = 0; i < UICamera.list.size; ++i)
		{
			cam = UICamera.list.buffer[i].cachedCamera;
			if (cam && (cam.cullingMask & layerMask) != 0)
				return cam;
		}
#if W2
		cam = MainCamera.instance;
#else
		cam = Camera.main;
#endif
		if (cam && (cam.cullingMask & layerMask) != 0) return cam;

#if UNITY_4_3 || UNITY_FLASH
		Camera[] cameras = NGUITools.FindActive<Camera>();
		for (int i = 0, imax = cameras.Length; i < imax; ++i)
#else
		Camera[] cameras = new Camera[Camera.allCamerasCount];
		int camerasFound = Camera.GetAllCameras(cameras);
		for (int i = 0; i < camerasFound; ++i)
#endif
		{
			cam = cameras[i];
			if (cam && cam.enabled && (cam.cullingMask & layerMask) != 0)
				return cam;
		}
		return null;
	}

	/// <summary>
	/// Add a collider to the game object containing one or more widgets.
	/// </summary>

	static public void AddWidgetCollider (GameObject go) { AddWidgetCollider(go, false); }

	/// <summary>
	/// Add a collider to the game object containing one or more widgets.
	/// </summary>

	static public void AddWidgetCollider (GameObject go, bool considerInactive)
	{
		if (go != null)
		{
			// 3D collider
			Collider col = go.GetComponent<Collider>();
			BoxCollider box = col as BoxCollider;

			if (box != null)
			{
				UpdateWidgetCollider(box, considerInactive);
				return;
			}

			// Is there already another collider present? If so, do nothing.
			if (col != null) return;

			// 2D collider
			BoxCollider2D box2 = go.GetComponent<BoxCollider2D>();

			if (box2 != null)
			{
				UpdateWidgetCollider(box2, considerInactive);
				return;
			}

			UICamera ui = UICamera.FindCameraForLayer(go.layer);

			if (ui != null && (ui.eventType == UICamera.EventType.World_2D || ui.eventType == UICamera.EventType.UI_2D))
			{
				box2 = go.AddComponent<BoxCollider2D>();
				box2.isTrigger = true;
#if UNITY_EDITOR
				UnityEditor.Undo.RegisterCreatedObjectUndo(box2, "Add Collider");
#endif
				UIWidget widget = go.GetComponent<UIWidget>();
				if (widget != null) widget.autoResizeBoxCollider = true;
				UpdateWidgetCollider(box2, considerInactive);
				return;
			}
			else
			{
				box = go.AddComponent<BoxCollider>();
#if UNITY_EDITOR
				UnityEditor.Undo.RegisterCreatedObjectUndo(box, "Add Collider");
#endif
				box.isTrigger = true;

				UIWidget widget = go.GetComponent<UIWidget>();
				if (widget != null) widget.autoResizeBoxCollider = true;
				UpdateWidgetCollider(box, considerInactive);
			}
		}
		return;
	}

	/// <summary>
	/// Adjust the widget's collider based on the depth of the widgets, as well as the widget's dimensions.
	/// </summary>

	static public void UpdateWidgetCollider (GameObject go)
	{
		UpdateWidgetCollider(go, false);
	}

	/// <summary>
	/// Adjust the widget's collider based on the depth of the widgets, as well as the widget's dimensions.
	/// </summary>

	static public void UpdateWidgetCollider (GameObject go, bool considerInactive)
	{
		if (go != null)
		{
			BoxCollider bc = go.GetComponent<BoxCollider>();

			if (bc != null)
			{
				UpdateWidgetCollider(bc, considerInactive);
				return;
			}
			BoxCollider2D box2 = go.GetComponent<BoxCollider2D>();
			if (box2 != null) UpdateWidgetCollider(box2, considerInactive);
		}
	}

	/// <summary>
	/// Adjust the widget's collider based on the depth of the widgets, as well as the widget's dimensions.
	/// </summary>

	static public void UpdateWidgetCollider (BoxCollider box, bool considerInactive)
	{
		if (box != null)
		{
			var go = box.gameObject;
			var w = go.GetComponent<UIWidget>();

			if (w != null)
			{
				var dr = w.drawRegion;

				if (dr.x != 0f || dr.y != 0f || dr.z != 1f || dr.w != 1f)
				{
					var region = w.drawingDimensions;
					box.center = new Vector3((region.x + region.z) * 0.5f, (region.y + region.w) * 0.5f);
					box.size = new Vector3(region.z - region.x, region.w - region.y);
				}
				else
				{
					var corners = w.localCorners;
					box.center = Vector3.Lerp(corners[0], corners[2], 0.5f);
					box.size = corners[2] - corners[0];
				}
			}
			else
			{
				var b = NGUIMath.CalculateRelativeWidgetBounds(go.transform, considerInactive);
				box.center = b.center;
				box.size = new Vector3(b.size.x, b.size.y, 0f);
			}
#if UNITY_EDITOR
			NGUITools.SetDirty(box);
#endif
		}
	}

	/// <summary>
	/// Adjust the widget's collider based on the depth of the widgets, as well as the widget's dimensions.
	/// </summary>

	static public void UpdateWidgetCollider (UIWidget w)
	{
		if (w == null) return;
		var bc = w.GetComponent<BoxCollider>();
		if (bc != null) UpdateWidgetCollider(w, bc);
		else UpdateWidgetCollider(w, w.GetComponent<BoxCollider2D>());
	}

	/// <summary>
	/// Adjust the widget's collider based on the depth of the widgets, as well as the widget's dimensions.
	/// </summary>

	static public void UpdateWidgetCollider (UIWidget w, BoxCollider box)
	{
		if (box != null && w != null)
		{
			var dr = w.drawRegion;

			if (dr.x != 0f || dr.y != 0f || dr.z != 1f || dr.w != 1f)
			{
				var region = w.drawingDimensions;
				var c = new Vector3((region.x + region.z) * 0.5f, (region.y + region.w) * 0.5f);
				var s = new Vector3(region.z - region.x, region.w - region.y);

				if (c != box.center || s != box.size)
				{
					box.center = c;
					box.size = s;
					NGUITools.SetDirty(box);
				}
			}
			else
			{
				var corners = w.localCorners;
				var c = Vector3.Lerp(corners[0], corners[2], 0.5f);
				var s = corners[2] - corners[0];

				if (c != box.center || s != box.size)
				{
					box.center = c;
					box.size = s;
					NGUITools.SetDirty(box);
				}
			}
		}
	}

	// <summary>
	/// Adjust the widget's collider based on the depth of the widgets, as well as the widget's dimensions.
	/// </summary>

	static public void UpdateWidgetCollider (UIWidget w, BoxCollider2D box)
	{
		if (box != null && w != null)
		{
			var dr = w.drawRegion;

			if (dr.x != 0f || dr.y != 0f || dr.z != 1f || dr.w != 1f)
			{
				var region = w.drawingDimensions;
				var c = new Vector2((region.x + region.z) * 0.5f, (region.y + region.w) * 0.5f);
				var s = new Vector2(region.z - region.x, region.w - region.y);

#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7
				if (c != box.center || s != box.size)
				{
					box.center = c;
					box.size = s;
					NGUITools.SetDirty(box);
				}
#else
				if (c != box.offset || s != box.size)
				{
					box.offset = c;
					box.size = s;
					NGUITools.SetDirty(box);
				}
#endif
			}
			else
			{
				var corners = w.localCorners;
				var c = Vector2.Lerp(corners[0], corners[2], 0.5f);
				var s = (Vector2)(corners[2] - corners[0]);

#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7
				if (c != box.center || s != box.size)
				{
					box.center = c;
					box.size = s;
					NGUITools.SetDirty(box);
				}
#else
				if (c != box.offset || s != box.size)
				{
					box.offset = c;
					box.size = s;
					NGUITools.SetDirty(box);
				}
#endif
			}
#if UNITY_EDITOR
			NGUITools.SetDirty(box);
#endif
		}
	}

	/// <summary>
	/// Adjust the widget's collider based on the depth of the widgets, as well as the widget's dimensions.
	/// </summary>

	static public void UpdateWidgetCollider (BoxCollider2D box, bool considerInactive)
	{
		if (box != null)
		{
			GameObject go = box.gameObject;
			UIWidget w = go.GetComponent<UIWidget>();

			if (w != null)
			{
				var dr = w.drawRegion;

				if (dr.x != 0f || dr.y != 0f || dr.z != 1f || dr.w != 1f)
				{
					var region = w.drawingDimensions;
					var c = new Vector2((region.x + region.z) * 0.5f, (region.y + region.w) * 0.5f);
					var s = new Vector2(region.z - region.x, region.w - region.y);

#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7
					if (c != box.center || s != box.size)
					{
						box.center = c;
						box.size = s;
						NGUITools.SetDirty(box);
					}
#else
					if (c != box.offset || s != box.size)
					{
						box.offset = c;
						box.size = s;
						NGUITools.SetDirty(box);
					}
#endif
				}
				else
				{
					var corners = w.localCorners;
					var c = Vector2.Lerp(corners[0], corners[2], 0.5f);
					var s = (Vector2)(corners[2] - corners[0]);

#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7
					if (c != box.center || s != box.size)
					{
						box.center = c;
						box.size = s;
						NGUITools.SetDirty(box);
					}
#else
					if (c != box.offset || s != box.size)
					{
						box.offset = c;
						box.size = s;
						NGUITools.SetDirty(box);
					}
#endif
				}
			}
			else
			{
				Bounds b = NGUIMath.CalculateRelativeWidgetBounds(go.transform, considerInactive);
#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7
				box.center = b.center;
#else
				box.offset = b.center;
#endif
				box.size = new Vector2(b.size.x, b.size.y);
			}
#if UNITY_EDITOR
			NGUITools.SetDirty(box);
#endif
		}
	}

	/// <summary>
	/// Helper function that returns the string name of the type.
	/// </summary>

	static public string GetTypeName<T> ()
	{
		string s = typeof(T).ToString();
		if (s.StartsWith("UI")) s = s.Substring(2);
		else if (s.StartsWith("UnityEngine.")) s = s.Substring(12);
		return s;
	}

	/// <summary>
	/// Helper function that returns the string name of the type.
	/// </summary>

	static public string GetTypeName (UnityEngine.Object obj)
	{
		if (obj == null) return "Null";
		string s = obj.GetType().ToString();
		if (s.StartsWith("UI")) s = s.Substring(2);
		else if (s.StartsWith("UnityEngine.")) s = s.Substring(12);
		return s;
	}

	/// <summary>
	/// Convenience method that works without warnings in both Unity 3 and 4.
	/// </summary>

	static public void RegisterUndo (UnityEngine.Object obj, string name)
	{
#if UNITY_EDITOR
		UnityEditor.Undo.RecordObject(obj, name);
		NGUITools.SetDirty(obj);
#endif
	}

	/// <summary>
	/// Convenience function that marks the specified object as dirty in the Unity Editor.
	/// </summary>

	static public void SetDirty (UnityEngine.Object obj, string undoName = "last change")
	{
#if UNITY_EDITOR
#if UNITY_2018_3_OR_NEWER
		if (obj)
		{
			UnityEditor.EditorUtility.SetDirty(obj);

			if (!UnityEditor.AssetDatabase.Contains(obj) && !Application.isPlaying)
			{
				if (obj is Component)
				{
					var component = (Component)obj;
					UnityEditor.SceneManagement.EditorSceneManager.MarkSceneDirty(component.gameObject.scene);
				}
				else if (!(obj is UnityEditor.EditorWindow || obj is ScriptableObject))
				{
					UnityEditor.SceneManagement.EditorSceneManager.MarkAllScenesDirty();
				}
			}
		}
#else
		if (obj) UnityEditor.EditorUtility.SetDirty(obj);
#endif
#endif
	}

	static public void CheckForPrefabStage (GameObject gameObject)
	{
#if UNITY_EDITOR && UNITY_2018_3_OR_NEWER

		var prefabStage = UnityEditor.SceneManagement.PrefabStageUtility.GetPrefabStage (gameObject);
		if (prefabStage == null)
			return;

		var rootsInParents = gameObject.GetComponentsInParent<UIRoot> (true);
		var panelsInParents = gameObject.GetComponentsInParent<UIPanel> (true);

		bool missingRoot = rootsInParents.Length == 0;
		bool missingPanel = panelsInParents.Length == 0;

		if (!missingRoot && !missingPanel)
			return;

		// Since this function is called from Awake/OnEnable, utilities like PrefabStage.prefabContentsRoot
		// or Scene.GetRootGameObjects () aren't available at this point

		var instanceRoot = gameObject.transform;
		while (instanceRoot.parent != null)
			instanceRoot = instanceRoot.parent;

		GameObject container = UnityEditor.EditorUtility.CreateGameObjectWithHideFlags ("UIRoot (Environment)", HideFlags.DontSave);
		container.layer = instanceRoot.gameObject.layer;

		if (missingRoot)
			container.AddComponent<UIRoot> ();

		if (missingPanel)
			container.AddComponent<UIPanel> ();

		UnityEngine.SceneManagement.SceneManager.MoveGameObjectToScene (container, prefabStage.scene);
		instanceRoot.SetParent (container.transform, false);
#endif
	}

	/// <summary>
	/// Add a new child game object.
	/// </summary>

	static public GameObject AddChild (GameObject parent) { return AddChild(parent, true, -1); }

	/// <summary>
	/// Add a new child game object.
	/// </summary>

	static public GameObject AddChild (this GameObject parent, int layer) { return AddChild(parent, true, layer); }

	/// <summary>
	/// Add a new child game object.
	/// </summary>

	static public GameObject AddChild (this GameObject parent, bool undo) { return AddChild(parent, undo, -1); }

	/// <summary>
	/// Add a new child game object.
	/// </summary>

	static public GameObject AddChild (this GameObject parent, bool undo, int layer)
	{
		var go = new GameObject();
#if UNITY_EDITOR
		if (undo && !Application.isPlaying)
			UnityEditor.Undo.RegisterCreatedObjectUndo(go, "Create Object");
#endif
		if (parent != null)
		{
			Transform t = go.transform;
			t.parent = parent.transform;
			t.localPosition = Vector3.zero;
			t.localRotation = Quaternion.identity;
			t.localScale = Vector3.one;
			if (layer == -1) go.layer = parent.layer;
			else if (layer > -1 && layer < 32) go.layer = layer;
		}
		return go;
	}

#if UNITY_5_5_OR_NEWER
	/// <summary>
	/// Instantiate an object and add it to the specified parent.
	/// </summary>

	static public GameObject AddChild (this Transform parent, GameObject prefab)
	{
		var go = UnityEngine.Object.Instantiate(prefab, parent.transform);
		var t = go.transform;
		t.parent = parent;
		t.localPosition = Vector3.zero;
		t.localRotation = Quaternion.identity;
		t.localScale = Vector3.one;
		go.SetActive(true);
		return go;
	}
#endif

	/// <summary>
	/// Instantiate an object and add it to the specified parent.
	/// </summary>

	static public GameObject AddChild (this GameObject parent, GameObject prefab) { return parent.AddChild(prefab, -1); }

	/// <summary>
	/// Instantiate an object and add it to the specified parent.
	/// </summary>

	static public GameObject AddChild (this GameObject parent, GameObject prefab, int layer)
	{
#if UNITY_5_5_OR_NEWER
		var go = UnityEngine.Object.Instantiate(prefab, parent.transform);
#if UNITY_EDITOR
		if (!Application.isPlaying) UnityEditor.Undo.RegisterCreatedObjectUndo(go, "Create Object");
#endif
		if (go != null)
		{
			var t = go.transform;
			go.name = prefab.name;

			if (parent != null)
			{
				if (layer == -1) go.layer = parent.layer;
				else if (layer > -1 && layer < 32) go.layer = layer;
			}

			t.localPosition = Vector3.zero;
			t.localRotation = Quaternion.identity;
			t.localScale = Vector3.one;
			go.SetActive(true);
		}
		return go;
#else
		var go = GameObject.Instantiate(prefab) as GameObject;
#if UNITY_EDITOR
		if (!Application.isPlaying) UnityEditor.Undo.RegisterCreatedObjectUndo(go, "Create Object");
#endif
		if (go != null)
		{
			Transform t = go.transform;
			go.name = prefab.name;

			if (parent != null)
			{
				t.parent = parent.transform;
				if (layer == -1) go.layer = parent.layer;
				else if (layer > -1 && layer < 32) go.layer = layer;
			}

			t.localPosition = Vector3.zero;
			t.localRotation = Quaternion.identity;
			t.localScale = Vector3.one;
			go.SetActive(true);
		}
		return go;
#endif
	}

	/// <summary>
	/// Calculate the game object's depth based on the widgets within, and also taking panel depth into consideration.
	/// </summary>

	static public int CalculateRaycastDepth (GameObject go)
	{
#if UNITY_5_5_OR_NEWER
		UnityEngine.Profiling.Profiler.BeginSample("Editor-only GC allocation (GetComponent)");
#else
		Profiler.BeginSample("Editor-only GC allocation (GetComponent)");
#endif
		var w = go.GetComponent<UIWidget>();

		if (w != null)
		{
#if UNITY_5_5_OR_NEWER
			UnityEngine.Profiling.Profiler.EndSample();
#else
			Profiler.EndSample();
#endif
			return w.raycastDepth;
		}

		var widgets = go.GetComponentsInChildren<UIWidget>();
#if UNITY_5_5_OR_NEWER
		UnityEngine.Profiling.Profiler.EndSample();
#else
		Profiler.EndSample();
#endif

		if (widgets.Length == 0) return 0;

		int depth = int.MaxValue;

		for (int i = 0, imax = widgets.Length; i < imax; ++i)
		{
			if (widgets[i].enabled)
				depth = Mathf.Min(depth, widgets[i].raycastDepth);
		}
		return depth;
	}

	/// <summary>
	/// Gathers all widgets and calculates the depth for the next widget.
	/// </summary>

	static public int CalculateNextDepth (GameObject go)
	{
		if (go)
		{
			int depth = -1;
			UIWidget[] widgets = go.GetComponentsInChildren<UIWidget>();
			for (int i = 0, imax = widgets.Length; i < imax; ++i)
				depth = Mathf.Max(depth, widgets[i].depth);
			return depth + 1;
		}
		return 0;
	}

	/// <summary>
	/// Gathers all widgets and calculates the depth for the next widget.
	/// </summary>

	static public int CalculateNextDepth (GameObject go, bool ignoreChildrenWithColliders)
	{
		if (go && ignoreChildrenWithColliders)
		{
			int depth = -1;
			UIWidget[] widgets = go.GetComponentsInChildren<UIWidget>();

			for (int i = 0, imax = widgets.Length; i < imax; ++i)
			{
				UIWidget w = widgets[i];
#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7
				if (w.cachedGameObject != go && (w.collider != null || w.GetComponent<Collider2D>() != null)) continue;
#else
				if (w.cachedGameObject != go && (w.GetComponent<Collider>() != null || w.GetComponent<Collider2D>() != null)) continue;
#endif
				depth = Mathf.Max(depth, w.depth);
			}
			return depth + 1;
		}
		return CalculateNextDepth(go);
	}

	/// <summary>
	/// Adjust the widgets' depth by the specified value.
	/// Returns '0' if nothing was adjusted, '1' if panels were adjusted, and '2' if widgets were adjusted.
	/// </summary>

	static public int AdjustDepth (GameObject go, int adjustment)
	{
		if (go != null)
		{
			UIPanel panel = go.GetComponent<UIPanel>();

			if (panel != null)
			{
				UIPanel[] panels = go.GetComponentsInChildren<UIPanel>(true);

				for (int i = 0; i < panels.Length; ++i)
				{
					UIPanel p = panels[i];
#if UNITY_EDITOR
					RegisterUndo(p, "Depth Change");
#endif
					p.depth = p.depth + adjustment;
				}
				return 1;
			}
			else
			{
				panel = FindInParents<UIPanel>(go);
				if (panel == null) return 0;

				UIWidget[] widgets = go.GetComponentsInChildren<UIWidget>(true);

				for (int i = 0, imax = widgets.Length; i < imax; ++i)
				{
					UIWidget w = widgets[i];
					if (w.panel != panel) continue;
#if UNITY_EDITOR
					RegisterUndo(w, "Depth Change");
#endif
					w.depth = w.depth + adjustment;
				}
				return 2;
			}
		}
		return 0;
	}

	/// <summary>
	/// Bring all of the widgets on the specified object forward.
	/// </summary>

	static public void BringForward (GameObject go)
	{
		int val = AdjustDepth(go, 1000);
		if (val == 1) NormalizePanelDepths();
		else if (val == 2) NormalizeWidgetDepths();
	}

	/// <summary>
	/// Push all of the widgets on the specified object back, making them appear behind everything else.
	/// </summary>

	static public void PushBack (GameObject go)
	{
		int val = AdjustDepth(go, -1000);
		if (val == 1) NormalizePanelDepths();
		else if (val == 2) NormalizeWidgetDepths();
	}

	/// <summary>
	/// Normalize the depths of all the widgets and panels in the scene, making them start from 0 and remain in order.
	/// </summary>

	static public void NormalizeDepths ()
	{
		NormalizeWidgetDepths();
		NormalizePanelDepths();
	}

	/// <summary>
	/// Normalize the depths of all the widgets in the scene, making them start from 0 and remain in order.
	/// </summary>

	static public void NormalizeWidgetDepths ()
	{
		NormalizeWidgetDepths(FindActive<UIWidget>());
	}

	/// <summary>
	/// Normalize the depths of all the widgets in the scene, making them start from 0 and remain in order.
	/// </summary>

	static public void NormalizeWidgetDepths (GameObject go)
	{
		NormalizeWidgetDepths(go.GetComponentsInChildren<UIWidget>());
	}

	/// <summary>
	/// Normalize the depths of all the widgets in the scene, making them start from 0 and remain in order.
	/// </summary>

	static public void NormalizeWidgetDepths (UIWidget[] list)
	{
		int size = list.Length;

		if (size > 0)
		{
			Array.Sort(list, UIWidget.FullCompareFunc);

			int start = 0;
			int current = list[0].depth;

			for (int i = 0; i < size; ++i)
			{
				UIWidget w = list[i];

				if (w.depth == current)
				{
					w.depth = start;
				}
				else
				{
					current = w.depth;
					w.depth = ++start;
				}
			}
		}
	}

	/// <summary>
	/// Normalize the depths of all the panels in the scene, making them start from 0 and remain in order.
	/// </summary>

	static public void NormalizePanelDepths ()
	{
		UIPanel[] list = FindActive<UIPanel>();
		int size = list.Length;

		if (size > 0)
		{
			Array.Sort(list, UIPanel.CompareFunc);

			int start = 0;
			int current = list[0].depth;

			for (int i = 0; i < size; ++i)
			{
				UIPanel p = list[i];

				if (p.depth == current)
				{
					p.depth = start;
				}
				else
				{
					current = p.depth;
					p.depth = ++start;
				}
			}
		}
	}

	/// <summary>
	/// Create a new UI.
	/// </summary>

	static public UIPanel CreateUI (bool advanced3D) { return CreateUI(null, advanced3D, -1); }

	/// <summary>
	/// Create a new UI.
	/// </summary>

	static public UIPanel CreateUI (bool advanced3D, int layer) { return CreateUI(null, advanced3D, layer); }

	/// <summary>
	/// Create a new UI.
	/// </summary>

	static public UIPanel CreateUI (Transform trans, bool advanced3D, int layer)
	{
		// Find the existing UI Root
		UIRoot root = (trans != null) ? NGUITools.FindInParents<UIRoot>(trans.gameObject) : null;

		if (root == null && UIRoot.list.Count > 0)
		{
			foreach (UIRoot r in UIRoot.list)
			{
				if (r.gameObject.layer == layer)
				{
					root = r;
					break;
				}
			}
		}

		// Try to find an existing panel
		if (root == null)
		{
			for (int i = 0, imax = UIPanel.list.Count; i < imax; ++i)
			{
				UIPanel p = UIPanel.list[i];
				GameObject go = p.gameObject;

				if (go.hideFlags == HideFlags.None && go.layer == layer)
				{
					trans.parent = p.transform;
					trans.localScale = Vector3.one;
					return p;
				}
			}
		}

		// If we are working with a different UI type, we need to treat it as a brand-new one instead
		if (root != null)
		{
			UICamera cam = root.GetComponentInChildren<UICamera>();

#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7
			if (cam != null && cam.camera.isOrthoGraphic == advanced3D)
#else
			if (cam != null && cam.GetComponent<Camera>().orthographic == advanced3D)
#endif
			{
				trans = null;
				root = null;
			}
		}

		// If no root found, create one
		if (root == null)
		{
			GameObject go = NGUITools.AddChild(null, false);
			root = go.AddComponent<UIRoot>();

			// Automatically find the layers if none were specified
			if (layer == -1) layer = LayerMask.NameToLayer("UI");
			if (layer == -1) layer = LayerMask.NameToLayer("2D UI");
			go.layer = layer;

			if (advanced3D)
			{
				go.name = "UI Root (3D)";
				root.scalingStyle = UIRoot.Scaling.Constrained;
			}
			else
			{
				go.name = "UI Root";
				root.scalingStyle = UIRoot.Scaling.Flexible;
			}

			root.UpdateScale();
		}

		// Find the first panel
		UIPanel panel = root.GetComponentInChildren<UIPanel>();

		if (panel == null)
		{
			// Find other active cameras in the scene
			Camera[] cameras = NGUITools.FindActive<Camera>();

			float depth = -1f;
			bool colorCleared = false;
			int mask = (1 << root.gameObject.layer);

			for (int i = 0; i < cameras.Length; ++i)
			{
				Camera c = cameras[i];

				// If the color is being cleared, we won't need to
				if (c.clearFlags == CameraClearFlags.Color ||
					c.clearFlags == CameraClearFlags.Skybox)
					colorCleared = true;

				// Choose the maximum depth
				depth = Mathf.Max(depth, c.depth);

				// Make sure this camera can't see the UI
				c.cullingMask = (c.cullingMask & (~mask));
			}

			// Create a camera that will draw the UI
			Camera cam = NGUITools.AddChild<Camera>(root.gameObject, false);
			cam.gameObject.AddComponent<UICamera>();
			cam.clearFlags = colorCleared ? CameraClearFlags.Depth : CameraClearFlags.Color;
			cam.backgroundColor = Color.grey;
			cam.cullingMask = mask;
			cam.depth = depth + 1f;

			if (advanced3D)
			{
				cam.nearClipPlane = 0.1f;
				cam.farClipPlane = 4f;
				cam.transform.localPosition = new Vector3(0f, 0f, -700f);
			}
			else
			{
				cam.orthographic = true;
				cam.orthographicSize = 1;
				cam.nearClipPlane = -10;
				cam.farClipPlane = 10;
			}

			// Make sure there is an audio listener present
			AudioListener[] listeners = NGUITools.FindActive<AudioListener>();
			if (listeners == null || listeners.Length == 0)
				cam.gameObject.AddComponent<AudioListener>();

			// Add a panel to the root
			panel = root.gameObject.AddComponent<UIPanel>();
#if UNITY_EDITOR
			if (!Application.isPlaying) UnityEditor.Selection.activeGameObject = panel.gameObject;
#endif
		}

		if (trans != null)
		{
			// Find the root object
			while (trans.parent != null) trans = trans.parent;

			if (NGUITools.IsChild(trans, panel.transform))
			{
				// Odd hierarchy -- can't reparent
				panel = trans.gameObject.AddComponent<UIPanel>();
			}
			else
			{
				// Reparent this root object to be a child of the panel
				trans.parent = panel.transform;
				trans.localScale = Vector3.one;
				trans.localPosition = Vector3.zero;
				SetChildLayer(panel.cachedTransform, panel.cachedGameObject.layer);
			}
		}
		return panel;
	}

	/// <summary>
	/// Helper function that recursively sets all children with widgets' game objects layers to the specified value.
	/// </summary>

	static public void SetChildLayer (this Transform t, int layer)
	{
		for (int i = 0; i < t.childCount; ++i)
		{
			Transform child = t.GetChild(i);
			child.gameObject.layer = layer;
			SetChildLayer(child, layer);
		}
	}

	static Dictionary<System.Type, string> mTypeNames = new Dictionary<Type, string>();

	/// <summary>
	/// Add a child object to the specified parent and attaches the specified script to it.
	/// </summary>

	static public T AddChild<T> (this GameObject parent) where T : Component
	{
		GameObject go = AddChild(parent);
		string name;

		if (!mTypeNames.TryGetValue(typeof(T), out name) || name == null)
		{
			name = GetTypeName<T>();
			mTypeNames[typeof(T)] = name;
		}
		go.name = name;
		return go.AddComponent<T>();
	}

	/// <summary>
	/// Add a child object to the specified parent and attaches the specified script to it.
	/// </summary>

	static public T AddChild<T> (this GameObject parent, bool undo) where T : Component
	{
		GameObject go = AddChild(parent, undo);
		string name;

		if (!mTypeNames.TryGetValue(typeof(T), out name) || name == null)
		{
			name = GetTypeName<T>();
			mTypeNames[typeof(T)] = name;
		}
		go.name = name;
		return go.AddComponent<T>();
	}

	/// <summary>
	/// Add a new widget of specified type.
	/// </summary>

	static public T AddWidget<T> (this GameObject go, int depth = int.MaxValue) where T : UIWidget
	{
		if (depth == int.MaxValue) depth = CalculateNextDepth(go);

		// Create the widget and place it above other widgets
		T widget = AddChild<T>(go);
		widget.width = 100;
		widget.height = 100;
		widget.depth = depth;
		return widget;
	}

	/// <summary>
	/// Add a sprite appropriate for the specified atlas sprite.
	/// It will be sliced if the sprite has an inner rect, and a regular sprite otherwise.
	/// </summary>

	static public UISprite AddSprite (this GameObject go, INGUIAtlas atlas, string spriteName, int depth = int.MaxValue)
	{
		UISpriteData sp = (atlas != null) ? atlas.GetSprite(spriteName) : null;
		UISprite sprite = AddWidget<UISprite>(go, depth);
		sprite.type = (sp == null || !sp.hasBorder) ? UISprite.Type.Simple : UISprite.Type.Sliced;
		sprite.atlas = atlas;
		sprite.spriteName = spriteName;
		return sprite;
	}

	/// <summary>
	/// Get the rootmost object of the specified game object.
	/// </summary>

	static public GameObject GetRoot (GameObject go)
	{
		Transform t = go.transform;

		for (; ; )
		{
			Transform parent = t.parent;
			if (parent == null) break;
			t = parent;
		}
		return t.gameObject;
	}

	/// <summary>
	/// Finds the specified component on the game object or one of its parents.
	/// This function has become obsolete with Unity 4.3.
	/// </summary>

	static public T FindInParents<T> (GameObject go) where T : Component
	{
		if (go == null) return null;

#if UNITY_5_5_OR_NEWER
		UnityEngine.Profiling.Profiler.BeginSample("Editor-only GC allocation (GetComponent)");
		var comp = go.GetComponentInParent<T>();
		UnityEngine.Profiling.Profiler.EndSample();
#else
		Profiler.BeginSample("Editor-only GC allocation (GetComponent)");
		var comp = go.GetComponentInParent<T>();
		Profiler.EndSample();
#endif
#if UNITY_FLASH
		return (T)comp;
#else
		return comp;
#endif
	}

	/// <summary>
	/// Finds the specified component on the game object or one of its parents.
	/// This function has become obsolete with Unity 4.3.
	/// </summary>

	static public T FindInParents<T> (Transform trans) where T : Component
	{
		if (trans == null) return null;

#if UNITY_5_5_OR_NEWER
		UnityEngine.Profiling.Profiler.BeginSample("Editor-only GC allocation (GetComponent)");
		var comp = trans.GetComponentInParent<T>();
		UnityEngine.Profiling.Profiler.EndSample();
#else
		Profiler.BeginSample("Editor-only GC allocation (GetComponent)");
		var comp = trans.GetComponentInParent<T>();
		Profiler.EndSample();
#endif
#if UNITY_FLASH
		return (T)comp;
#else
		return comp;
#endif
	}

	/// <summary>
	/// Destroy the specified object, immediately if in edit mode.
	/// </summary>

	static public void Destroy (UnityEngine.Object obj)
	{
		if (obj)
		{
			if (obj is Transform)
			{
				var t = (obj as Transform);
				var go = t.gameObject;

				if (Application.isPlaying)
				{
					go.SetActive(false);
					t.parent = null;
					UnityEngine.Object.Destroy(go);
				}
				else UnityEngine.Object.DestroyImmediate(go);
			}
			else if (obj is GameObject)
			{
				var go = obj as GameObject;
				var t = go.transform;

				if (Application.isPlaying)
				{
					go.SetActive(false);
					t.parent = null;
					UnityEngine.Object.Destroy(go);
				}
				else UnityEngine.Object.DestroyImmediate(go);
			}
			else if (Application.isPlaying) UnityEngine.Object.Destroy(obj);
			else UnityEngine.Object.DestroyImmediate(obj);
		}
	}

	/// <summary>
	/// Convenience extension that destroys all children of the transform.
	/// </summary>

	static public void DestroyChildren (this Transform t)
	{
		bool isPlaying = Application.isPlaying;

		while (t.childCount != 0)
		{
			Transform child = t.GetChild(0);

			if (isPlaying)
			{
				child.parent = null;
				UnityEngine.Object.Destroy(child.gameObject);
			}
			else UnityEngine.Object.DestroyImmediate(child.gameObject);
		}
	}

	/// <summary>
	/// Destroy the specified object immediately, unless not in the editor, in which case the regular Destroy is used instead.
	/// </summary>

	static public void DestroyImmediate (UnityEngine.Object obj)
	{
		if (obj != null)
		{
			if (Application.isEditor) UnityEngine.Object.DestroyImmediate(obj);
			else UnityEngine.Object.Destroy(obj);
		}
	}

	/// <summary>
	/// Call the specified function on all objects in the scene.
	/// </summary>

	static public void Broadcast (string funcName)
	{
		GameObject[] gos = GameObject.FindObjectsOfType(typeof(GameObject)) as GameObject[];
		for (int i = 0, imax = gos.Length; i < imax; ++i) gos[i].SendMessage(funcName, SendMessageOptions.DontRequireReceiver);
	}

	/// <summary>
	/// Call the specified function on all objects in the scene.
	/// </summary>

	static public void Broadcast (string funcName, object param)
	{
		GameObject[] gos = GameObject.FindObjectsOfType(typeof(GameObject)) as GameObject[];
		for (int i = 0, imax = gos.Length; i < imax; ++i) gos[i].SendMessage(funcName, param, SendMessageOptions.DontRequireReceiver);
	}

	/// <summary>
	/// Determines whether the 'parent' contains a 'child' in its hierarchy.
	/// </summary>

	static public bool IsChild (Transform parent, Transform child)
	{
		return child.IsChildOf(parent);

		// Legacy way of doing it prior to Unity adding IsChildOf
		//if (parent == null || child == null) return false;

		//while (child != null)
		//{
		//	  if (child == parent) return true;
		//	  child = child.parent;
		//}
		//return false;
	}

	/// <summary>
	/// Activate the specified object and all of its children.
	/// </summary>

	static void Activate (Transform t) { Activate(t, false); }

	/// <summary>
	/// Activate the specified object and all of its children.
	/// </summary>

	static void Activate (Transform t, bool compatibilityMode)
	{
		SetActiveSelf(t.gameObject, true);

		if (compatibilityMode)
		{
			// If there is even a single enabled child, then we're using a Unity 4.0-based nested active state scheme.
			for (int i = 0, imax = t.childCount; i < imax; ++i)
			{
				var child = t.GetChild(i);
				if (child.gameObject.activeSelf) return;
			}

			// If this point is reached, then all the children are disabled, so we must be using a Unity 3.5-based active state scheme.
			for (int i = 0, imax = t.childCount; i < imax; ++i)
			{
				var child = t.GetChild(i);
				Activate(child, true);
			}
		}
	}

	/// <summary>
	/// Deactivate the specified object and all of its children.
	/// </summary>

	static void Deactivate (Transform t) { SetActiveSelf(t.gameObject, false); }

	/// <summary>
	/// SetActiveRecursively enables children before parents. This is a problem when a widget gets re-enabled
	/// and it tries to find a panel on its parent.
	/// </summary>

	static public void SetActive (GameObject go, bool state) { SetActive(go, state, true); }

	/// <summary>
	/// SetActiveRecursively enables children before parents. This is a problem when a widget gets re-enabled
	/// and it tries to find a panel on its parent.
	/// </summary>

	static public void SetActive (GameObject go, bool state, bool compatibilityMode)
	{
		if (go)
		{
			if (state)
			{
				Activate(go.transform, compatibilityMode);
#if UNITY_EDITOR
				if (Application.isPlaying)
#endif
					CallCreatePanel(go.transform);
			}
			else Deactivate(go.transform);
		}
	}

	/// <summary>
	/// Ensure that all widgets have had their panels created, forcing the update right away rather than on the following frame.
	/// </summary>

	[System.Diagnostics.DebuggerHidden]
	[System.Diagnostics.DebuggerStepThrough]
	static void CallCreatePanel (Transform t)
	{
		var w = t.GetComponent<UIWidget>();
		if (w != null) w.CreatePanel();
		for (int i = 0, imax = t.childCount; i < imax; ++i)
			CallCreatePanel(t.GetChild(i));
	}

	/// <summary>
	/// Activate or deactivate children of the specified game object without changing the active state of the object itself.
	/// </summary>

	static public void SetActiveChildren (GameObject go, bool state)
	{
		Transform t = go.transform;

		if (state)
		{
			for (int i = 0, imax = t.childCount; i < imax; ++i)
			{
				Transform child = t.GetChild(i);
				Activate(child);
			}
		}
		else
		{
			for (int i = 0, imax = t.childCount; i < imax; ++i)
			{
				Transform child = t.GetChild(i);
				Deactivate(child);
			}
		}
	}

	/// <summary>
	/// Helper function that returns whether the specified MonoBehaviour is active.
	/// </summary>

	[System.Obsolete("Use NGUITools.GetActive instead")]
	static public bool IsActive (Behaviour mb)
	{
		return mb != null && mb.enabled && mb.gameObject.activeInHierarchy;
	}

	/// <summary>
	/// Helper function that returns whether the specified MonoBehaviour is active.
	/// </summary>

	[System.Diagnostics.DebuggerHidden]
	[System.Diagnostics.DebuggerStepThrough]
	static public bool GetActive (Behaviour mb)
	{
		return mb && mb.enabled && mb.gameObject.activeInHierarchy;
	}

	/// <summary>
	/// Unity4 has changed GameObject.active to GameObject.activeself.
	/// </summary>

	[System.Diagnostics.DebuggerHidden]
	[System.Diagnostics.DebuggerStepThrough]
	static public bool GetActive (GameObject go)
	{
		return go && go.activeInHierarchy;
	}

	/// <summary>
	/// Unity4 has changed GameObject.active to GameObject.SetActive.
	/// </summary>

	[System.Diagnostics.DebuggerHidden]
	[System.Diagnostics.DebuggerStepThrough]
	static public void SetActiveSelf (GameObject go, bool state)
	{
		go.SetActive(state);
	}

	/// <summary>
	/// Recursively set the game object's layer.
	/// </summary>

	static public void SetLayer (GameObject go, int layer)
	{
		go.layer = layer;

		Transform t = go.transform;

		for (int i = 0, imax = t.childCount; i < imax; ++i)
		{
			Transform child = t.GetChild(i);
			SetLayer(child.gameObject, layer);
		}
	}

	/// <summary>
	/// Helper function used to make the vector use integer numbers.
	/// </summary>

	static public Vector3 Round (Vector3 v)
	{
		v.x = Mathf.Round(v.x);
		v.y = Mathf.Round(v.y);
		v.z = Mathf.Round(v.z);
		return v;
	}

	/// <summary>
	/// Make the specified selection pixel-perfect.
	/// </summary>

	static public void MakePixelPerfect (Transform t)
	{
		UIWidget w = t.GetComponent<UIWidget>();
		if (w != null) w.MakePixelPerfect();

		if (t.GetComponent<UIAnchor>() == null && t.GetComponent<UIRoot>() == null)
		{
#if UNITY_EDITOR
			RegisterUndo(t, "Make Pixel-Perfect");
#endif
			t.localPosition = Round(t.localPosition);
			t.localScale = Round(t.localScale);
		}

		// Recurse into children
		for (int i = 0, imax = t.childCount; i < imax; ++i)
			MakePixelPerfect(t.GetChild(i));
	}

	/// <summary>
	/// Given the root widget, adjust its position so that it fits on the screen.
	/// </summary>

	static public void FitOnScreen (this Camera cam, Transform t, bool considerInactive = false, bool considerChildren = true)
	{
		var bounds = NGUIMath.CalculateRelativeWidgetBounds(t, t, considerInactive, considerChildren);

		var sp = cam.WorldToScreenPoint(t.position);
		var min = sp + bounds.min;
		var max = sp + bounds.max;

		var sw = Screen.width;
		var sh = Screen.height;
		var offset = Vector2.zero;

		if (min.x < 0f) offset.x = -min.x;
		else if (max.x > sw) offset.x = sw - max.x;

		if (min.y < 0f) offset.y = -min.y;
		else if (max.y > sh) offset.y = sh - max.y;

		if (offset.sqrMagnitude > 0f) t.localPosition += new Vector3(offset.x, offset.y, 0f);
	}

	/// <summary>
	/// Fit the specified NGUI hierarchy on the screen.
	/// Example: uiCamera.FitOnScreen(contentObjectTransform, UICamera.lastEventPosition);
	/// </summary>

	static public void FitOnScreen (this Camera cam, Transform transform, Vector3 pos)
	{
		cam.FitOnScreen(transform, transform, pos);
	}

	/// <summary>
	/// Fit the specified NGUI hierarchy on the screen.
	/// Example: uiCamera.FitOnScreen(rootObjectTransform, contentObjectTransform, UICamera.lastEventPosition);
	/// </summary>

	static public void FitOnScreen (this Camera cam, Transform transform, Transform content, Vector3 pos, bool considerInactive = false)
	{
		Bounds b;
		cam.FitOnScreen(transform, content, pos, out b, considerInactive);
	}

	/// <summary>
	/// Fit the specified NGUI hierarchy on the screen.
	/// Example: uiCamera.FitOnScreen(rootObjectTransform, contentObjectTransform, UICamera.lastEventPosition);
	/// </summary>

	static public void FitOnScreen (this Camera cam, Transform transform, Transform content, Vector3 pos, out Bounds bounds, bool considerInactive = false)
	{
		bounds = NGUIMath.CalculateRelativeWidgetBounds(transform, content, considerInactive);

		Vector3 min = bounds.min;
		Vector3 max = bounds.max;
		Vector3 size = bounds.size;

		size.x += min.x;
		size.y -= max.y;

		if (cam != null)
		{
			// Since the screen can be of different than expected size, we want to convert
			// mouse coordinates to view space, then convert that to world position.
			pos.x = Mathf.Clamp01(pos.x / Screen.width);
			pos.y = Mathf.Clamp01(pos.y / Screen.height);

			// Calculate the ratio of the camera's target orthographic size to current screen size
			float activeSize = cam.orthographicSize / transform.parent.lossyScale.y;
			float ratio = (Screen.height * 0.5f) / activeSize;

			// Calculate the maximum on-screen size of the tooltip window
			max = new Vector2(ratio * size.x / Screen.width, ratio * size.y / Screen.height);

			// Limit the tooltip to always be visible
			pos.x = Mathf.Min(pos.x, 1f - max.x);
			pos.y = Mathf.Max(pos.y, max.y);

			// Update the absolute position and save the local one
			transform.position = cam.ViewportToWorldPoint(pos);
			pos = transform.localPosition;
			pos.x = Mathf.Round(pos.x);
			pos.y = Mathf.Round(pos.y);
		}
		else
		{
			// Don't let the tooltip leave the screen area
			if (pos.x + size.x > Screen.width) pos.x = Screen.width - size.x;
			if (pos.y - size.y < 0f) pos.y = size.y;

			// Simple calculation that assumes that the camera is of fixed size
			pos.x -= Screen.width * 0.5f;
			pos.y -= Screen.height * 0.5f;
		}
		transform.localPosition = pos;
	}

	/// <summary>
	/// Save the specified binary data into the specified file.
	/// </summary>

	static public bool Save (string fileName, byte[] bytes)
	{
#if UNITY_WEBPLAYER || UNITY_FLASH || UNITY_METRO || UNITY_WP8 || UNITY_WP_8_1
		return false;
#else
		if (!NGUITools.fileAccess) return false;

		string path = Application.persistentDataPath + "/" + fileName;

		if (bytes == null)
		{
			if (File.Exists(path)) File.Delete(path);
			return true;
		}

		FileStream file = null;

		try
		{
			file = File.Create(path);
		}
		catch (System.Exception ex)
		{
			Debug.LogError(ex.Message);
			return false;
		}

		file.Write(bytes, 0, bytes.Length);
		file.Close();
		return true;
#endif
	}

	/// <summary>
	/// Load all binary data from the specified file.
	/// </summary>

	static public byte[] Load (string fileName)
	{
#if UNITY_WEBPLAYER || UNITY_FLASH || UNITY_METRO || UNITY_WP8 || UNITY_WP_8_1
		return null;
#else
		if (!NGUITools.fileAccess) return null;

		string path = Application.persistentDataPath + "/" + fileName;

		if (File.Exists(path))
		{
			return File.ReadAllBytes(path);
		}
		return null;
#endif
	}

	/// <summary>
	/// Pre-multiply shaders result in a black outline if this operation is done in the shader. It's better to do it outside.
	/// </summary>

	static public Color ApplyPMA (Color c)
	{
		if (c.a != 1f)
		{
			c.r *= c.a;
			c.g *= c.a;
			c.b *= c.a;
		}
		return c;
	}

	/// <summary>
	/// Inform all widgets underneath the specified object that the parent has changed.
	/// </summary>

	static public void MarkParentAsChanged (GameObject go)
	{
		UIRect[] rects = go.GetComponentsInChildren<UIRect>();
		for (int i = 0, imax = rects.Length; i < imax; ++i)
			rects[i].ParentHasChanged();
	}

	/// <summary>
	/// Access to the clipboard via undocumented APIs.
	/// </summary>

	static public string clipboard
	{
		get
		{
			TextEditor te = new TextEditor();
			te.Paste();
#if UNITY_4_6 || UNITY_4_7 || UNITY_5_0 || UNITY_5_1 || UNITY_5_2
			return te.content.text;
#else
			return te.text;
#endif
		}
		set
		{
			TextEditor te = new TextEditor();
#if UNITY_4_6 || UNITY_4_7 || UNITY_5_0 || UNITY_5_1 || UNITY_5_2
			te.content = new GUIContent(value);
#else
			te.text = value;
#endif
			te.OnFocus();
			te.Copy();
		}
	}

	[System.Obsolete("Use NGUIText.EncodeColor instead")]
	static public string EncodeColor (Color c) { return NGUIText.EncodeColor24(c); }

	[System.Obsolete("Use NGUIText.ParseColor instead")]
	static public Color ParseColor (string text, int offset) { return NGUIText.ParseColor24(text, offset); }

	[System.Obsolete("Use NGUIText.StripSymbols instead")]
	static public string StripSymbols (string text) { return NGUIText.StripSymbols(text); }

	/// <summary>
	/// Extension for the game object that checks to see if the component already exists before adding a new one.
	/// If the component is already present it will be returned instead.
	/// </summary>

	static public T AddMissingComponent<T> (this GameObject go) where T : Component
	{
#if UNITY_FLASH
		object comp = go.GetComponent<T>();
#else
		T comp = go.GetComponent<T>();
#endif
		if (comp == null)
		{
#if UNITY_EDITOR
			if (!Application.isPlaying)
				RegisterUndo(go, "Add " + typeof(T));
#endif
			comp = go.AddComponent<T>();
		}
#if UNITY_FLASH
		return (T)comp;
#else
		return comp;
#endif
	}

	// Temporary variable to avoid GC allocation
	static Vector3[] mSides = new Vector3[4];

	/// <summary>
	/// Get sides relative to the specified camera. The order is left, top, right, bottom.
	/// </summary>

	static public Vector3[] GetSides (this Camera cam)
	{
		return cam.GetSides(Mathf.Lerp(cam.nearClipPlane, cam.farClipPlane, 0.5f), null);
	}

	/// <summary>
	/// Get sides relative to the specified camera. The order is left, top, right, bottom.
	/// </summary>

	static public Vector3[] GetSides (this Camera cam, float depth)
	{
		return cam.GetSides(depth, null);
	}

	/// <summary>
	/// Get sides relative to the specified camera. The order is left, top, right, bottom.
	/// </summary>

	static public Vector3[] GetSides (this Camera cam, Transform relativeTo)
	{
		return cam.GetSides(Mathf.Lerp(cam.nearClipPlane, cam.farClipPlane, 0.5f), relativeTo);
	}

	/// <summary>
	/// Get sides relative to the specified camera. The order is left, top, right, bottom.
	/// </summary>

	static public Vector3[] GetSides (this Camera cam, float depth, Transform relativeTo)
	{
#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7
		if (cam.isOrthoGraphic)
#else
		if (cam.orthographic)
#endif
		{
			float os = cam.orthographicSize;
			float x0 = -os;
			float x1 = os;
			float y0 = -os;
			float y1 = os;

			Rect rect = cam.rect;
			Vector2 size = screenSize;

			float aspect = size.x / size.y;
			aspect *= rect.width / rect.height;
			x0 *= aspect;
			x1 *= aspect;

			// We want to ignore the scale, as scale doesn't affect the camera's view region in Unity
			Transform t = cam.transform;
			Quaternion rot = t.rotation;
			Vector3 pos = t.position;

			int w = Mathf.RoundToInt(size.x);
			int h = Mathf.RoundToInt(size.y);

			if ((w & 1) == 1) pos.x -= 1f / size.x;
			if ((h & 1) == 1) pos.y += 1f / size.y;

			mSides[0] = rot * (new Vector3(x0, 0f, depth)) + pos;
			mSides[1] = rot * (new Vector3(0f, y1, depth)) + pos;
			mSides[2] = rot * (new Vector3(x1, 0f, depth)) + pos;
			mSides[3] = rot * (new Vector3(0f, y0, depth)) + pos;
		}
		else
		{
			mSides[0] = cam.ViewportToWorldPoint(new Vector3(0f, 0.5f, depth));
			mSides[1] = cam.ViewportToWorldPoint(new Vector3(0.5f, 1f, depth));
			mSides[2] = cam.ViewportToWorldPoint(new Vector3(1f, 0.5f, depth));
			mSides[3] = cam.ViewportToWorldPoint(new Vector3(0.5f, 0f, depth));
		}

		if (relativeTo != null)
		{
			for (int i = 0; i < 4; ++i)
				mSides[i] = relativeTo.InverseTransformPoint(mSides[i]);
		}
		return mSides;
	}

	/// <summary>
	/// Get the camera's world-space corners. The order is bottom-left, top-left, top-right, bottom-right.
	/// </summary>

	static public Vector3[] GetWorldCorners (this Camera cam)
	{
		float depth = Mathf.Lerp(cam.nearClipPlane, cam.farClipPlane, 0.5f);
		return cam.GetWorldCorners(depth, null);
	}

	/// <summary>
	/// Get the camera's world-space corners. The order is bottom-left, top-left, top-right, bottom-right.
	/// </summary>

	static public Vector3[] GetWorldCorners (this Camera cam, float depth)
	{
		return cam.GetWorldCorners(depth, null);
	}

	/// <summary>
	/// Get the camera's world-space corners. The order is bottom-left, top-left, top-right, bottom-right.
	/// </summary>

	static public Vector3[] GetWorldCorners (this Camera cam, Transform relativeTo)
	{
		return cam.GetWorldCorners(Mathf.Lerp(cam.nearClipPlane, cam.farClipPlane, 0.5f), relativeTo);
	}

	/// <summary>
	/// Get the camera's world-space corners. The order is bottom-left, top-left, top-right, bottom-right.
	/// </summary>

	static public Vector3[] GetWorldCorners (this Camera cam, float depth, Transform relativeTo)
	{
#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7
		if (cam.isOrthoGraphic)
#else
		if (cam.orthographic)
#endif
		{
			float os = cam.orthographicSize;
			float x0 = -os;
			float x1 = os;
			float y0 = -os;
			float y1 = os;

			Rect rect = cam.rect;
			Vector2 size = screenSize;
			float aspect = size.x / size.y;
			aspect *= rect.width / rect.height;
			x0 *= aspect;
			x1 *= aspect;

			// We want to ignore the scale, as scale doesn't affect the camera's view region in Unity
			Transform t = cam.transform;
			Quaternion rot = t.rotation;
			Vector3 pos = t.position;

			mSides[0] = rot * (new Vector3(x0, y0, depth)) + pos;
			mSides[1] = rot * (new Vector3(x0, y1, depth)) + pos;
			mSides[2] = rot * (new Vector3(x1, y1, depth)) + pos;
			mSides[3] = rot * (new Vector3(x1, y0, depth)) + pos;
		}
		else
		{
			mSides[0] = cam.ViewportToWorldPoint(new Vector3(0f, 0f, depth));
			mSides[1] = cam.ViewportToWorldPoint(new Vector3(0f, 1f, depth));
			mSides[2] = cam.ViewportToWorldPoint(new Vector3(1f, 1f, depth));
			mSides[3] = cam.ViewportToWorldPoint(new Vector3(1f, 0f, depth));
		}

		if (relativeTo != null)
		{
			for (int i = 0; i < 4; ++i)
				mSides[i] = relativeTo.InverseTransformPoint(mSides[i]);
		}
		return mSides;
	}

	/// <summary>
	/// Convenience function that converts Class + Function combo into Class.Function representation.
	/// </summary>

	static public string GetFuncName (object obj, string method)
	{
		if (obj == null) return "<null>";
		string type = obj.GetType().ToString();
		int period = type.LastIndexOf('/');
		if (period > 0) type = type.Substring(period + 1);
		return string.IsNullOrEmpty(method) ? type : type + "/" + method;
	}

#if UNITY_EDITOR || !UNITY_FLASH
	/// <summary>
	/// Execute the specified function on the target game object.
	/// </summary>

	static public void Execute<T> (GameObject go, string funcName) where T : Component
	{
		T[] comps = go.GetComponents<T>();

		foreach (T comp in comps)
		{
#if !UNITY_EDITOR && (UNITY_WEBPLAYER || UNITY_FLASH || UNITY_METRO || UNITY_WP8 || UNITY_WP_8_1)
			comp.SendMessage(funcName, SendMessageOptions.DontRequireReceiver);
#else
			MethodInfo method = comp.GetType().GetMethod(funcName, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
			if (method != null) method.Invoke(comp, null);
#endif
		}
	}

	/// <summary>
	/// Execute the specified function on the target game object and all of its children.
	/// </summary>

	static public void ExecuteAll<T> (GameObject root, string funcName) where T : Component
	{
		Execute<T>(root, funcName);
		Transform t = root.transform;
		for (int i = 0, imax = t.childCount; i < imax; ++i)
			ExecuteAll<T>(t.GetChild(i).gameObject, funcName);
	}

	/// <summary>
	/// Immediately start, update, and create all the draw calls from newly instantiated UI.
	/// This is useful if you plan on doing something like immediately taking a screenshot then destroying the UI.
	/// </summary>

	static public void ImmediatelyCreateDrawCalls (GameObject root)
	{
		ExecuteAll<UIWidget>(root, "Start");
		ExecuteAll<UIPanel>(root, "Start");
		ExecuteAll<UIWidget>(root, "Update");
		ExecuteAll<UIPanel>(root, "Update");
		ExecuteAll<UIPanel>(root, "LateUpdate");
	}
#endif

#if UNITY_EDITOR
	static int mSizeFrame = -1;
	static Func<Vector2> s_GetSizeOfMainGameView;
	[System.NonSerialized] static Vector2 mGameSize = Vector2.one;
	[System.NonSerialized] static bool mCheckedMainViewFunc = false;

	/// <summary>
	/// Size of the game view cannot be retrieved from Screen.width and Screen.height when the game view is hidden.
	/// </summary>

	static public Vector2 screenSize
	{
		get
		{
			int frame = Time.frameCount;

			if (mSizeFrame != frame || !Application.isPlaying)
			{
#if UNITY_5_5_OR_NEWER
				UnityEngine.Profiling.Profiler.BeginSample("Editor-only GC allocation (NGUITools.screenSize)");
#else
				Profiler.BeginSample("Editor-only GC allocation (NGUITools.screenSize)");
#endif
				mSizeFrame = frame;

				if (s_GetSizeOfMainGameView == null && !mCheckedMainViewFunc)
				{
					mCheckedMainViewFunc = true;
					System.Type type = System.Type.GetType("UnityEditor.GameView,UnityEditor");

					// Post-Unity 5.4
					var methodInfo = type.GetMethod("GetMainGameViewTargetSize",
						System.Reflection.BindingFlags.Public |
						System.Reflection.BindingFlags.NonPublic |
						System.Reflection.BindingFlags.Static);

					// Pre-Unity 5.4
					if (methodInfo == null)
						methodInfo = type.GetMethod("GetSizeOfMainGameView",
							System.Reflection.BindingFlags.Public |
							System.Reflection.BindingFlags.NonPublic |
							System.Reflection.BindingFlags.Static);

					// Create the delegate
					if (methodInfo != null)
					{
						s_GetSizeOfMainGameView = (Func<Vector2>)Delegate.CreateDelegate(typeof(Func<Vector2>), methodInfo);
					}
					else Debug.LogWarning("Unable to get the main game view size function");
				}

				if (s_GetSizeOfMainGameView != null)
				{
//#if UNITY_EDITOR_OSX
					// There seems to be a Unity 5.4 bug that returns invalid screen size when the mouse is clicked (wtf?) on OSX
					//if (mGameSize.x == 1f && mGameSize.y == 1f) mGameSize = s_GetSizeOfMainGameView();
//#else
					mGameSize = s_GetSizeOfMainGameView();
//#endif
				}
				else mGameSize = new Vector2(Screen.width, Screen.height);
#if UNITY_5_5_OR_NEWER
				UnityEngine.Profiling.Profiler.EndSample();
#else
				Profiler.EndSample();
#endif
				#if UNITY_EDITOR && W2
				if (mGameSize.magnitude > 4000f) Debug.LogWarning(mGameSize);
				#endif
			}
			return mGameSize;
		}
	}
#else
	/// <summary>
	/// Size of the game view cannot be retrieved from Screen.width and Screen.height when the game view is hidden.
	/// </summary>

	static public Vector2 screenSize { get { return new Vector2(Screen.width, Screen.height); } }
#endif

	/// <summary>
	/// List of keys that can be checked.
	/// </summary>

	static public KeyCode[] keys = new KeyCode[]
	{
		KeyCode.Backspace, // 8,
		KeyCode.Tab, // 9,
		KeyCode.Clear, // 12,
		KeyCode.Return, // 13,
		KeyCode.Pause, // 19,
		KeyCode.Escape, // 27,
		KeyCode.Space, // 32,
		KeyCode.Exclaim, // 33,
		KeyCode.DoubleQuote, // 34,
		KeyCode.Hash, // 35,
		KeyCode.Dollar, // 36,
		KeyCode.Ampersand, // 38,
		KeyCode.Quote, // 39,
		KeyCode.LeftParen, // 40,
		KeyCode.RightParen, // 41,
		KeyCode.Asterisk, // 42,
		KeyCode.Plus, // 43,
		KeyCode.Comma, // 44,
		KeyCode.Minus, // 45,
		KeyCode.Period, // 46,
		KeyCode.Slash, // 47,
		KeyCode.Alpha0, // 48,
		KeyCode.Alpha1, // 49,
		KeyCode.Alpha2, // 50,
		KeyCode.Alpha3, // 51,
		KeyCode.Alpha4, // 52,
		KeyCode.Alpha5, // 53,
		KeyCode.Alpha6, // 54,
		KeyCode.Alpha7, // 55,
		KeyCode.Alpha8, // 56,
		KeyCode.Alpha9, // 57,
		KeyCode.Colon, // 58,
		KeyCode.Semicolon, // 59,
		KeyCode.Less, // 60,
		KeyCode.Equals, // 61,
		KeyCode.Greater, // 62,
		KeyCode.Question, // 63,
		KeyCode.At, // 64,
		KeyCode.LeftBracket, // 91,
		KeyCode.Backslash, // 92,
		KeyCode.RightBracket, // 93,
		KeyCode.Caret, // 94,
		KeyCode.Underscore, // 95,
		KeyCode.BackQuote, // 96,
		KeyCode.A, // 97,
		KeyCode.B, // 98,
		KeyCode.C, // 99,
		KeyCode.D, // 100,
		KeyCode.E, // 101,
		KeyCode.F, // 102,
		KeyCode.G, // 103,
		KeyCode.H, // 104,
		KeyCode.I, // 105,
		KeyCode.J, // 106,
		KeyCode.K, // 107,
		KeyCode.L, // 108,
		KeyCode.M, // 109,
		KeyCode.N, // 110,
		KeyCode.O, // 111,
		KeyCode.P, // 112,
		KeyCode.Q, // 113,
		KeyCode.R, // 114,
		KeyCode.S, // 115,
		KeyCode.T, // 116,
		KeyCode.U, // 117,
		KeyCode.V, // 118,
		KeyCode.W, // 119,
		KeyCode.X, // 120,
		KeyCode.Y, // 121,
		KeyCode.Z, // 122,
		KeyCode.Delete, // 127,
		KeyCode.Keypad0, // 256,
		KeyCode.Keypad1, // 257,
		KeyCode.Keypad2, // 258,
		KeyCode.Keypad3, // 259,
		KeyCode.Keypad4, // 260,
		KeyCode.Keypad5, // 261,
		KeyCode.Keypad6, // 262,
		KeyCode.Keypad7, // 263,
		KeyCode.Keypad8, // 264,
		KeyCode.Keypad9, // 265,
		KeyCode.KeypadPeriod, // 266,
		KeyCode.KeypadDivide, // 267,
		KeyCode.KeypadMultiply, // 268,
		KeyCode.KeypadMinus, // 269,
		KeyCode.KeypadPlus, // 270,
		KeyCode.KeypadEnter, // 271,
		KeyCode.KeypadEquals, // 272,
		KeyCode.UpArrow, // 273,
		KeyCode.DownArrow, // 274,
		KeyCode.RightArrow, // 275,
		KeyCode.LeftArrow, // 276,
		KeyCode.Insert, // 277,
		KeyCode.Home, // 278,
		KeyCode.End, // 279,
		KeyCode.PageUp, // 280,
		KeyCode.PageDown, // 281,
		KeyCode.F1, // 282,
		KeyCode.F2, // 283,
		KeyCode.F3, // 284,
		KeyCode.F4, // 285,
		KeyCode.F5, // 286,
		KeyCode.F6, // 287,
		KeyCode.F7, // 288,
		KeyCode.F8, // 289,
		KeyCode.F9, // 290,
		KeyCode.F10, // 291,
		KeyCode.F11, // 292,
		KeyCode.F12, // 293,
		KeyCode.F13, // 294,
		KeyCode.F14, // 295,
		KeyCode.F15, // 296,
		KeyCode.Numlock, // 300,
		KeyCode.CapsLock, // 301,
		KeyCode.ScrollLock, // 302,
		KeyCode.RightShift, // 303,
		KeyCode.LeftShift, // 304,
		KeyCode.RightControl, // 305,
		KeyCode.LeftControl, // 306,
		KeyCode.RightAlt, // 307,
		KeyCode.LeftAlt, // 308,
		//KeyCode.Mouse0, // 323,
		//KeyCode.Mouse1, // 324,
		//KeyCode.Mouse2, // 325,
		KeyCode.Mouse3, // 326,
		KeyCode.Mouse4, // 327,
		KeyCode.Mouse5, // 328,
		KeyCode.Mouse6, // 329,
		KeyCode.JoystickButton0, // 330,
		KeyCode.JoystickButton1, // 331,
		KeyCode.JoystickButton2, // 332,
		KeyCode.JoystickButton3, // 333,
		KeyCode.JoystickButton4, // 334,
		KeyCode.JoystickButton5, // 335,
		KeyCode.JoystickButton6, // 336,
		KeyCode.JoystickButton7, // 337,
		KeyCode.JoystickButton8, // 338,
		KeyCode.JoystickButton9, // 339,
		KeyCode.JoystickButton10, // 340,
		KeyCode.JoystickButton11, // 341,
		KeyCode.JoystickButton12, // 342,
		KeyCode.JoystickButton13, // 343,
		KeyCode.JoystickButton14, // 344,
		KeyCode.JoystickButton15, // 345,
		KeyCode.JoystickButton16, // 346,
		KeyCode.JoystickButton17, // 347,
		KeyCode.JoystickButton18, // 348,
		KeyCode.JoystickButton19, // 349,
	};

	/// <summary>
	/// Helper function that converts the specified key to a 3-character key identifier for captions.
	/// </summary>

	static public string KeyToCaption (KeyCode key)
	{
		switch (key)
		{
			case KeyCode.None: return null;
			case KeyCode.Backspace: return "Backspace";
			case KeyCode.Tab: return "Tab";
			case KeyCode.Clear: return "Clear";
			case KeyCode.Return: return "Return";
			case KeyCode.Pause: return "PS";
			case KeyCode.Escape: return "Esc";
			case KeyCode.Space: return "Space";
			case KeyCode.Exclaim: return "!";
			case KeyCode.DoubleQuote: return "''";
			case KeyCode.Hash: return "#";
			case KeyCode.Dollar: return "$";
			case KeyCode.Ampersand: return "&";
			case KeyCode.Quote: return "'";
			case KeyCode.LeftParen: return "(";
			case KeyCode.RightParen: return ")";
			case KeyCode.Asterisk: return "*";
			case KeyCode.Plus: return "+";
			case KeyCode.Comma: return ",";
			case KeyCode.Minus: return "-";
			case KeyCode.Period: return ".";
			case KeyCode.Slash: return "/";
			case KeyCode.Alpha0: return "0";
			case KeyCode.Alpha1: return "1";
			case KeyCode.Alpha2: return "2";
			case KeyCode.Alpha3: return "3";
			case KeyCode.Alpha4: return "4";
			case KeyCode.Alpha5: return "5";
			case KeyCode.Alpha6: return "6";
			case KeyCode.Alpha7: return "7";
			case KeyCode.Alpha8: return "8";
			case KeyCode.Alpha9: return "9";
			case KeyCode.Colon: return ":";
			case KeyCode.Semicolon: return ";";
			case KeyCode.Less: return "<";
			case KeyCode.Equals: return "=";
			case KeyCode.Greater: return ">";
			case KeyCode.Question: return "?";
			case KeyCode.At: return "@";
			case KeyCode.LeftBracket: return "[";
			case KeyCode.Backslash: return "\\";
			case KeyCode.RightBracket: return "]";
			case KeyCode.Caret: return "^";
			case KeyCode.Underscore: return "_";
			case KeyCode.BackQuote: return "`";
			case KeyCode.A: return "A";
			case KeyCode.B: return "B";
			case KeyCode.C: return "C";
			case KeyCode.D: return "D";
			case KeyCode.E: return "E";
			case KeyCode.F: return "F";
			case KeyCode.G: return "G";
			case KeyCode.H: return "H";
			case KeyCode.I: return "I";
			case KeyCode.J: return "J";
			case KeyCode.K: return "K";
			case KeyCode.L: return "L";
			case KeyCode.M: return "M";
			case KeyCode.N: return "N";
			case KeyCode.O: return "O";
			case KeyCode.P: return "P";
			case KeyCode.Q: return "Q";
			case KeyCode.R: return "R";
			case KeyCode.S: return "S";
			case KeyCode.T: return "T";
			case KeyCode.U: return "U";
			case KeyCode.V: return "V";
			case KeyCode.W: return "W";
			case KeyCode.X: return "X";
			case KeyCode.Y: return "Y";
			case KeyCode.Z: return "Z";
			case KeyCode.Delete: return "Del";
			case KeyCode.Keypad0: return "K0";
			case KeyCode.Keypad1: return "K1";
			case KeyCode.Keypad2: return "K2";
			case KeyCode.Keypad3: return "K3";
			case KeyCode.Keypad4: return "K4";
			case KeyCode.Keypad5: return "K5";
			case KeyCode.Keypad6: return "K6";
			case KeyCode.Keypad7: return "K7";
			case KeyCode.Keypad8: return "K8";
			case KeyCode.Keypad9: return "K9";
			case KeyCode.KeypadPeriod: return "K.";
			case KeyCode.KeypadDivide: return "K/";
			case KeyCode.KeypadMultiply: return "K*";
			case KeyCode.KeypadMinus: return "K-";
			case KeyCode.KeypadPlus: return "K+";
			case KeyCode.KeypadEnter: return "KE";
			case KeyCode.KeypadEquals: return "KQ";
			case KeyCode.UpArrow: return "UP";
			case KeyCode.DownArrow: return "DN";
			case KeyCode.RightArrow: return "LT";
			case KeyCode.LeftArrow: return "RT";
			case KeyCode.Insert: return "Ins";
			case KeyCode.Home: return "Home";
			case KeyCode.End: return "End";
			case KeyCode.PageUp: return "PU";
			case KeyCode.PageDown: return "PD";
			case KeyCode.F1: return "F1";
			case KeyCode.F2: return "F2";
			case KeyCode.F3: return "F3";
			case KeyCode.F4: return "F4";
			case KeyCode.F5: return "F5";
			case KeyCode.F6: return "F6";
			case KeyCode.F7: return "F7";
			case KeyCode.F8: return "F8";
			case KeyCode.F9: return "F9";
			case KeyCode.F10: return "F10";
			case KeyCode.F11: return "F11";
			case KeyCode.F12: return "F12";
			case KeyCode.F13: return "F13";
			case KeyCode.F14: return "F14";
			case KeyCode.F15: return "F15";
			case KeyCode.Numlock: return "Num";
			case KeyCode.CapsLock: return "Cap";
			case KeyCode.ScrollLock: return "Scr";
			case KeyCode.RightShift: return "RS";
			case KeyCode.LeftShift: return "LS";
			case KeyCode.RightControl: return "RC";
			case KeyCode.LeftControl: return "LC";
			case KeyCode.RightAlt: return "RA";
			case KeyCode.LeftAlt: return "LA";
			case KeyCode.Mouse0: return "M0";
			case KeyCode.Mouse1: return "M1";
			case KeyCode.Mouse2: return "M2";
			case KeyCode.Mouse3: return "M3";
			case KeyCode.Mouse4: return "M4";
			case KeyCode.Mouse5: return "M5";
			case KeyCode.Mouse6: return "M6";
			case KeyCode.JoystickButton0: return "(A)";
			case KeyCode.JoystickButton1: return "(B)";
			case KeyCode.JoystickButton2: return "(X)";
			case KeyCode.JoystickButton3: return "(Y)";
			case KeyCode.JoystickButton4: return "(RB)";
			case KeyCode.JoystickButton5: return "(LB)";
			case KeyCode.JoystickButton6: return "(Back)";
			case KeyCode.JoystickButton7: return "(Start)";
			case KeyCode.JoystickButton8: return "(LS)";
			case KeyCode.JoystickButton9: return "(RS)";
			case KeyCode.JoystickButton10: return "J10";
			case KeyCode.JoystickButton11: return "J11";
			case KeyCode.JoystickButton12: return "J12";
			case KeyCode.JoystickButton13: return "J13";
			case KeyCode.JoystickButton14: return "J14";
			case KeyCode.JoystickButton15: return "J15";
			case KeyCode.JoystickButton16: return "J16";
			case KeyCode.JoystickButton17: return "J17";
			case KeyCode.JoystickButton18: return "J18";
			case KeyCode.JoystickButton19: return "J19";
		}
		return null;
	}

	/// <summary>
	/// The opposite of KeyToCaption() function that converts the string representation to its KeyCode value.
	/// </summary>

	static public KeyCode CaptionToKey (string caption)
	{
		if (string.IsNullOrEmpty(caption)) return KeyCode.None;
		if (caption == "Backspace") return KeyCode.Backspace;
		if (caption == "Tab") return KeyCode.Tab;
		if (caption == "Clear") return KeyCode.Clear;
		if (caption == "Return") return KeyCode.Return;
		if (caption == "Pause") return KeyCode.Pause;
		if (caption == "Esc") return KeyCode.Escape;
		if (caption == "Space") return KeyCode.Space;
		if (caption == "!") return KeyCode.Exclaim;
		if (caption == "''") return KeyCode.DoubleQuote;
		if (caption == "#") return KeyCode.Hash;
		if (caption == "$") return KeyCode.Dollar;
		if (caption == "&") return KeyCode.Ampersand;
		if (caption == "'") return KeyCode.Quote;
		if (caption == "(") return KeyCode.LeftParen;
		if (caption == ")") return KeyCode.RightParen;
		if (caption == "*") return KeyCode.Asterisk;
		if (caption == "+") return KeyCode.Plus;
		if (caption == ",") return KeyCode.Comma;
		if (caption == "-") return KeyCode.Minus;
		if (caption == ".") return KeyCode.Period;
		if (caption == "/") return KeyCode.Slash;
		if (caption == "0") return KeyCode.Alpha0;
		if (caption == "1") return KeyCode.Alpha1;
		if (caption == "2") return KeyCode.Alpha2;
		if (caption == "3") return KeyCode.Alpha3;
		if (caption == "4") return KeyCode.Alpha4;
		if (caption == "5") return KeyCode.Alpha5;
		if (caption == "6") return KeyCode.Alpha6;
		if (caption == "7") return KeyCode.Alpha7;
		if (caption == "8") return KeyCode.Alpha8;
		if (caption == "9") return KeyCode.Alpha9;
		if (caption == ";//") return KeyCode.Colon;
		if (caption == ";") return KeyCode.Semicolon;
		if (caption == "<") return KeyCode.Less;
		if (caption == "=") return KeyCode.Equals;
		if (caption == ">") return KeyCode.Greater;
		if (caption == "?") return KeyCode.Question;
		if (caption == "@") return KeyCode.At;
		if (caption == "[") return KeyCode.LeftBracket;
		if (caption == "\\") return KeyCode.Backslash;
		if (caption == "]") return KeyCode.RightBracket;
		if (caption == "^") return KeyCode.Caret;
		if (caption == "_") return KeyCode.Underscore;
		if (caption == "`") return KeyCode.BackQuote;
		if (caption == "A") return KeyCode.A;
		if (caption == "B") return KeyCode.B;
		if (caption == "C") return KeyCode.C;
		if (caption == "D") return KeyCode.D;
		if (caption == "E") return KeyCode.E;
		if (caption == "F") return KeyCode.F;
		if (caption == "G") return KeyCode.G;
		if (caption == "H") return KeyCode.H;
		if (caption == "I") return KeyCode.I;
		if (caption == "J") return KeyCode.J;
		if (caption == "K") return KeyCode.K;
		if (caption == "L") return KeyCode.L;
		if (caption == "M") return KeyCode.M;
		if (caption == "N") return KeyCode.N;
		if (caption == "O") return KeyCode.O;
		if (caption == "P") return KeyCode.P;
		if (caption == "Q") return KeyCode.Q;
		if (caption == "R") return KeyCode.R;
		if (caption == "S") return KeyCode.S;
		if (caption == "T") return KeyCode.T;
		if (caption == "U") return KeyCode.U;
		if (caption == "V") return KeyCode.V;
		if (caption == "W") return KeyCode.W;
		if (caption == "X") return KeyCode.X;
		if (caption == "Y") return KeyCode.Y;
		if (caption == "Z") return KeyCode.Z;
		if (caption == "Del") return KeyCode.Delete;
		if (caption == "K0") return KeyCode.Keypad0;
		if (caption == "K1") return KeyCode.Keypad1;
		if (caption == "K2") return KeyCode.Keypad2;
		if (caption == "K3") return KeyCode.Keypad3;
		if (caption == "K4") return KeyCode.Keypad4;
		if (caption == "K5") return KeyCode.Keypad5;
		if (caption == "K6") return KeyCode.Keypad6;
		if (caption == "K7") return KeyCode.Keypad7;
		if (caption == "K8") return KeyCode.Keypad8;
		if (caption == "K9") return KeyCode.Keypad9;
		if (caption == "K.") return KeyCode.KeypadPeriod;
		if (caption == "K/") return KeyCode.KeypadDivide;
		if (caption == "K*") return KeyCode.KeypadMultiply;
		if (caption == "K-") return KeyCode.KeypadMinus;
		if (caption == "K+") return KeyCode.KeypadPlus;
		if (caption == "KE") return KeyCode.KeypadEnter;
		if (caption == "KQ") return KeyCode.KeypadEquals;
		if (caption == "UP") return KeyCode.UpArrow;
		if (caption == "DN") return KeyCode.DownArrow;
		if (caption == "LT") return KeyCode.RightArrow;
		if (caption == "RT") return KeyCode.LeftArrow;
		if (caption == "Ins") return KeyCode.Insert;
		if (caption == "Home") return KeyCode.Home;
		if (caption == "End") return KeyCode.End;
		if (caption == "PU") return KeyCode.PageUp;
		if (caption == "PD") return KeyCode.PageDown;
		if (caption == "F1") return KeyCode.F1;
		if (caption == "F2") return KeyCode.F2;
		if (caption == "F3") return KeyCode.F3;
		if (caption == "F4") return KeyCode.F4;
		if (caption == "F5") return KeyCode.F5;
		if (caption == "F6") return KeyCode.F6;
		if (caption == "F7") return KeyCode.F7;
		if (caption == "F8") return KeyCode.F8;
		if (caption == "F9") return KeyCode.F9;
		if (caption == "F10") return KeyCode.F10;
		if (caption == "F11") return KeyCode.F11;
		if (caption == "F12") return KeyCode.F12;
		if (caption == "F13") return KeyCode.F13;
		if (caption == "F14") return KeyCode.F14;
		if (caption == "F15") return KeyCode.F15;
		if (caption == "Num") return KeyCode.Numlock;
		if (caption == "Cap") return KeyCode.CapsLock;
		if (caption == "Scr") return KeyCode.ScrollLock;
		if (caption == "RS") return KeyCode.RightShift;
		if (caption == "LS") return KeyCode.LeftShift;
		if (caption == "RC") return KeyCode.RightControl;
		if (caption == "LC") return KeyCode.LeftControl;
		if (caption == "RA") return KeyCode.RightAlt;
		if (caption == "LA") return KeyCode.LeftAlt;
		if (caption == "M0") return KeyCode.Mouse0;
		if (caption == "M1") return KeyCode.Mouse1;
		if (caption == "M2") return KeyCode.Mouse2;
		if (caption == "M3") return KeyCode.Mouse3;
		if (caption == "M4") return KeyCode.Mouse4;
		if (caption == "M5") return KeyCode.Mouse5;
		if (caption == "M6") return KeyCode.Mouse6;
		if (caption == "(A)") return KeyCode.JoystickButton0;
		if (caption == "(B)") return KeyCode.JoystickButton1;
		if (caption == "(X)") return KeyCode.JoystickButton2;
		if (caption == "(Y)") return KeyCode.JoystickButton3;
		if (caption == "(RB)") return KeyCode.JoystickButton4;
		if (caption == "(LB)") return KeyCode.JoystickButton5;
		if (caption == "(Back)") return KeyCode.JoystickButton6;
		if (caption == "(Start)") return KeyCode.JoystickButton7;
		if (caption == "(LS)") return KeyCode.JoystickButton8;
		if (caption == "(RS)") return KeyCode.JoystickButton9;
		if (caption == "J10") return KeyCode.JoystickButton10;
		if (caption == "J11") return KeyCode.JoystickButton11;
		if (caption == "J12") return KeyCode.JoystickButton12;
		if (caption == "J13") return KeyCode.JoystickButton13;
		if (caption == "J14") return KeyCode.JoystickButton14;
		if (caption == "J15") return KeyCode.JoystickButton15;
		if (caption == "J16") return KeyCode.JoystickButton16;
		if (caption == "J17") return KeyCode.JoystickButton17;
		if (caption == "J18") return KeyCode.JoystickButton18;
		if (caption == "J19") return KeyCode.JoystickButton19;
		return KeyCode.None;
	}

	static Dictionary<string, UIWidget> mWidgets = new Dictionary<string, UIWidget>();
	static UIPanel mRoot;
	static GameObject mGo;

	public delegate void OnInitFunc<T> (T w) where T : UIWidget;

	/// <summary>
	/// Immediately add a new widget to the screen or return an existing one that matches the specified ID.
	/// The usage of this function is very similar to GUI.Draw in a sense that it can be used to quickly
	/// show persistent widgets via code.
	/// </summary>

	static public T Draw<T> (string id, OnInitFunc<T> onInit = null) where T : UIWidget
	{
		UIWidget w;
		if (mWidgets.TryGetValue(id, out w) && w) return (T)w;

		if (mRoot == null)
		{
			UICamera baseCam = null;
			UIRoot baseRoot = null;

			for (int i = 0; i < UIRoot.list.Count; ++i)
			{
				UIRoot root = UIRoot.list[i];

				if (root)
				{
					UICamera cam = UICamera.FindCameraForLayer(root.gameObject.layer);

					if (cam && cam.cachedCamera.orthographic)
					{
						baseCam = cam;
						baseRoot = root;
						break;
					}
				}
			}

			if (baseCam == null)
			{
				mRoot = NGUITools.CreateUI(false, LayerMask.NameToLayer("UI"));
			}
			else
			{
				mRoot = baseRoot.gameObject.AddChild<UIPanel>();
			}

			mRoot.depth = 100000;
			mGo = mRoot.gameObject;
			mGo.name = "Immediate Mode GUI";
		}

		w = mGo.AddWidget<T>();
		w.name = id;
		mWidgets[id] = w;
		if (onInit != null) onInit((T)w);
		return (T)w;
	}

	/// <summary>
	/// Transforms this color from gamma to linear space, but only if the active color space is actually set to linear.
	/// </summary>

	static public Color GammaToLinearSpace (this Color c)
	{
		if (mColorSpace == ColorSpace.Uninitialized)
			mColorSpace = QualitySettings.activeColorSpace;

		if (mColorSpace == ColorSpace.Linear)
		{
			return new Color(
				Mathf.GammaToLinearSpace(c.r),
				Mathf.GammaToLinearSpace(c.g),
				Mathf.GammaToLinearSpace(c.b),
				Mathf.GammaToLinearSpace(c.a));
		}
		return c;
	}

	/// <summary>
	/// Transforms this color from linear to gamma space, but only if the active color space is actually set to linear.
	/// </summary>

	static public Color LinearToGammaSpace (this Color c)
	{
		if (mColorSpace == ColorSpace.Uninitialized)
			mColorSpace = QualitySettings.activeColorSpace;

		if (mColorSpace == ColorSpace.Linear)
		{
			return new Color(
				Mathf.LinearToGammaSpace(c.r),
				Mathf.LinearToGammaSpace(c.g),
				Mathf.LinearToGammaSpace(c.b),
				Mathf.LinearToGammaSpace(c.a));
		}
		return c;
	}

	static ColorSpace mColorSpace = ColorSpace.Uninitialized;

	/// <summary>
	/// Helper function that determines whether the two atlases are related.
	/// </summary>

	static public bool CheckIfRelated (INGUIAtlas a, INGUIAtlas b)
	{
		if (a == null || b == null) return false;
		return a == b || a.References(b) || b.References(a);
	}

	/// <summary>
	/// Replace all atlas reference of one atlas with another.
	/// </summary>

	static public void Replace (INGUIAtlas before, INGUIAtlas after)
	{
		var list = FindActive<UISprite>();

		for (int i = 0, imax = list.Length; i < imax; ++i)
		{
			var sp = list[i];

			if (sp.atlas == before)
			{
				sp.atlas = after;
#if UNITY_EDITOR
				SetDirty(sp);
#endif
			}
		}

		var f0 = Resources.FindObjectsOfTypeAll<UIFont>();

		for (int i = 0, imax = f0.Length; i < imax; ++i)
		{
			var font = f0[i];

			if (font.atlas == before)
			{
				font.atlas = after;
#if UNITY_EDITOR
				SetDirty(font);
#endif
			}
		}

		var f1 = Resources.FindObjectsOfTypeAll<NGUIFont>();

		for (int i = 0, imax = f1.Length; i < imax; ++i)
		{
			var font = f1[i];

			if (font.atlas == before)
			{
				font.atlas = after;
#if UNITY_EDITOR
				SetDirty(font);
#endif
			}
		}

		var labels = FindActive<UILabel>();

		for (int i = 0, imax = labels.Length; i < imax; ++i)
		{
			var lbl = labels[i];

			if (lbl.bitmapFont != null && lbl.atlas == before)
			{
				lbl.atlas = after;
#if UNITY_EDITOR
				SetDirty(lbl);
#endif
			}
		}
	}

	/// <summary>
	/// Helper function that determines whether the two atlases are related.
	/// </summary>

	static public bool CheckIfRelated (INGUIFont a, INGUIFont b)
	{
		if (a == null || b == null) return false;
		if (a.isDynamic && b.isDynamic && a.dynamicFont.fontNames[0] == b.dynamicFont.fontNames[0]) return true;
		return a == b || a.References(b) || b.References(a);
	}
}