/*
******************************************************************************** 
  *Copyright(C),coolae.net 
  *Author:  chenbin
  *Version:  2.0 
  *Date:  2017-01-09
  *Description:  在NGUI的uicamera的基础上作了修改，这样支持在3d场景中单独控制操作控制
  *Others:  
  *History:
*********************************************************************************
*/ 

using UnityEngine;
using System.Collections.Generic;

#if UNITY_EDITOR
using UnityEditor;
#endif

/// <summary>
/// This script should be attached to each camera that's used to draw the objects with
/// UI components on them. This may mean only one camera (main camera or your UI camera),
/// or multiple cameras if you happen to have multiple viewports. Failing to attach this
/// script simply means that objects drawn by this camera won't receive UI notifications:
///
/// * OnHover (isOver) is sent when the mouse hovers over a collider or moves away.
/// * OnPress (isDown) is sent when a mouse button gets pressed on the collider.
/// * OnSelect (selected) is sent when a mouse button is first pressed on an object. Repeated presses won't result in an OnSelect(true).
/// * OnClick () is sent when a mouse is pressed and released on the same object.
///   UICamera.currentTouchID tells you which button was clicked.
/// * OnDoubleClick () is sent when the click happens twice within a fourth of a second.
///   UICamera.currentTouchID tells you which button was clicked.
///
/// * OnDragStart () is sent to a game object under the touch just before the OnDrag() notifications begin.
/// * OnDrag (delta) is sent to an object that's being dragged.
/// * OnDragOver (draggedObject) is sent to a game object when another object is dragged over its area.
/// * OnDragOut (draggedObject) is sent to a game object when another object is dragged out of its area.
/// * OnDragEnd () is sent to a dragged object when the drag event finishes.
///
/// * OnTooltip (show) is sent when the mouse hovers over a collider for some time without moving.
/// * OnScroll (float delta) is sent out when the mouse scroll wheel is moved.
/// * OnKey (KeyCode key) is sent when keyboard or controller input is used.
/// </summary>

namespace Coolape
{
	
	[RequireComponent (typeof(Camera))]
	public class MyMainCamera : MonoBehaviour
	{
		/// <summary>
		/// The isbe controled.是否是被ui控制,需要和CLUIDrag4World接合起来用
		/// </summary>
		public bool isbeControled = false;
		//add by chenbin

		public enum ControlScheme
		{
			Mouse,
			Touch,
			Controller,
		}

		/// <summary>
		/// Whether the touch event will be sending out the OnClick notification at the end.
		/// </summary>

		public enum ClickNotification
		{
			None,
			Always,
			BasedOnDelta,
		}

		/// <summary>
		/// Ambiguous mouse, touch, or controller event.
		/// </summary>

		public class MouseOrTouch
		{
			public Vector2 pos;
			// Current position of the mouse or touch event
			public Vector2 lastPos;
			// Previous position of the mouse or touch event
			public Vector2 delta;
			// Delta since last update
			public Vector2 totalDelta;
			// Delta since the event started being tracked

			public Camera pressedCam;
			// Camera that the OnPress(true) was fired with

			public GameObject last;
			// Last object under the touch or mouse
			public GameObject current;
			// Current game object under the touch or mouse
			public GameObject pressed;
			// Last game object to receive OnPress
			public GameObject dragged;
			// Game object that's being dragged

			public float pressTime = 0f;
			// When the touch event started
			public float clickTime = 0f;
			// The last time a click event was sent out

			public ClickNotification clickNotification = ClickNotification.Always;
			public bool touchBegan = true;
			public bool pressStarted = false;
			public bool dragStarted = false;

			/// <summary>
			/// Delta time since the touch operation started.
			/// </summary>

			public float deltaTime { get { return RealTime.time - pressTime; } }

			/// <summary>
			/// Returns whether this touch is currently over a UI element.
			/// </summary>

			public bool isOverUI {
				get {
					return current != null && current != fallThrough && NGUITools.FindInParents<UIRoot> (current) != null;
				}
			}
		}

		/// <summary>
		/// Camera type controls how raycasts are handled by the UICamera.
		/// </summary>

		public enum EventType : int
		{
			World_3D,
			// Perform a Physics.Raycast and sort by distance to the point that was hit.
			UI_3D,
			// Perform a Physics.Raycast and sort by widget depth.
			World_2D,
			// Perform a Physics2D.OverlapPoint
			UI_2D,
			// Physics2D.OverlapPoint then sort by widget depth
		}

		/// <summary>
		/// List of all active cameras in the scene.
		/// </summary>

		static public BetterList<MyMainCamera> list = new BetterList<MyMainCamera> ();

		public delegate bool GetKeyStateFunc (KeyCode key);

		public delegate float GetAxisFunc (string name);

		/// <summary>
		/// GetKeyDown function -- return whether the specified key was pressed this Update().
		/// </summary>

		static public GetKeyStateFunc GetKeyDown = Input.GetKeyDown;

		/// <summary>
		/// GetKeyDown function -- return whether the specified key was released this Update().
		/// </summary>

		static public GetKeyStateFunc GetKeyUp = Input.GetKeyUp;

		/// <summary>
		/// GetKey function -- return whether the specified key is currently held.
		/// </summary>

		static public GetKeyStateFunc GetKey = Input.GetKey;

		/// <summary>
		/// GetAxis function -- return the state of the specified axis.
		/// </summary>

		static public GetAxisFunc GetAxis = Input.GetAxis;

		public delegate void OnScreenResize ();

		/// <summary>
		/// Delegate triggered when the screen size changes for any reason.
		/// Subscribe to it if you don't want to compare Screen.width and Screen.height each frame.
		/// </summary>

		static public OnScreenResize onScreenResize;

		/// <summary>
		/// Event type -- use "UI" for your user interfaces, and "World" for your game camera.
		/// This setting changes how raycasts are handled. Raycasts have to be more complicated for UI cameras.
		/// </summary>

		public EventType eventType = EventType.UI_3D;

		/// <summary>
		/// By default, events will go to rigidbodies when the Event Type is not UI.
		/// You can change this behaviour back to how it was pre-3.7.0 using this flag.
		/// </summary>

		public bool eventsGoToColliders = false;

		/// <summary>
		/// Which layers will receive events.
		/// </summary>

		public LayerMask eventReceiverMask = -1;

		/// <summary>
		/// If 'true', currently hovered object will be shown in the top left corner.
		/// </summary>

		public bool debug = false;

		/// <summary>
		/// Whether the mouse input is used.
		/// </summary>

		public bool useMouse = true;

		/// <summary>
		/// Whether the touch-based input is used.
		/// </summary>

		public bool useTouch = true;

		/// <summary>
		/// Whether multi-touch is allowed.
		/// </summary>

		public bool allowMultiTouch = true;

		/// <summary>
		/// Whether the keyboard events will be processed.
		/// </summary>

		public bool useKeyboard = true;

		/// <summary>
		/// Whether the joystick and controller events will be processed.
		/// </summary>

		public bool useController = true;

		[System.Obsolete ("Use new OnDragStart / OnDragOver / OnDragOut / OnDragEnd events instead")]
		public bool stickyPress { get { return true; } }

		/// <summary>
		/// Whether the tooltip will disappear as soon as the mouse moves (false) or only if the mouse moves outside of the widget's area (true).
		/// </summary>

		public bool stickyTooltip = true;

		/// <summary>
		/// How long of a delay to expect before showing the tooltip.
		/// </summary>

		public float tooltipDelay = 1f;

		/// <summary>
		/// If enabled, a tooltip will be shown after touch gets pressed on something and held for more than "tooltipDelay" seconds.
		/// </summary>

		public bool longPressTooltip = false;

		/// <summary>
		/// How much the mouse has to be moved after pressing a button before it starts to send out drag events.
		/// </summary>

		public float mouseDragThreshold = 4f;

		/// <summary>
		/// How far the mouse is allowed to move in pixels before it's no longer considered for click events, if the click notification is based on delta.
		/// </summary>

		public float mouseClickThreshold = 10f;

		/// <summary>
		/// How much the mouse has to be moved after pressing a button before it starts to send out drag events.
		/// </summary>

		public float touchDragThreshold = 40f;

		/// <summary>
		/// How far the touch is allowed to move in pixels before it's no longer considered for click events, if the click notification is based on delta.
		/// </summary>

		public float touchClickThreshold = 40f;

		/// <summary>
		/// Raycast range distance. By default it's as far as the camera can see.
		/// </summary>

		public float rangeDistance = -1f;

		/// <summary>
		/// Name of the axis used for scrolling.
		/// </summary>

		public string scrollAxisName = "Mouse ScrollWheel";

		/// <summary>
		/// Name of the axis used to send up and down key events.
		/// </summary>

		public string verticalAxisName = "Vertical";

		/// <summary>
		/// Name of the axis used to send left and right key events.
		/// </summary>

		public string horizontalAxisName = "Horizontal";

		/// <summary>
		/// Simulate a right-click on OSX when the Command key is held and a left-click is used (for trackpad).
		/// </summary>

		public bool commandClick = true;

		/// <summary>
		/// Various keys used by the camera.
		/// </summary>

		public KeyCode submitKey0 = KeyCode.Return;
		public KeyCode submitKey1 = KeyCode.JoystickButton0;
		public KeyCode cancelKey0 = KeyCode.Escape;
		public KeyCode cancelKey1 = KeyCode.JoystickButton1;

		public delegate void OnCustomInput ();

		/// <summary>
		/// Custom input processing logic, if desired. For example: WP7 touches.
		/// Use UICamera.current to get the current camera.
		/// </summary>

		static public OnCustomInput onCustomInput;

		/// <summary>
		/// Whether tooltips will be shown or not.
		/// </summary>

		static public bool showTooltips = true;

		/// <summary>
		/// Position of the last touch (or mouse) event.
		/// </summary>

		static public Vector2 lastTouchPosition = Vector2.zero;

		/// <summary>
		/// Position of the last touch (or mouse) event in the world.
		/// </summary>

		static public Vector3 lastWorldPosition = Vector3.zero;

		/// <summary>
		/// Last raycast hit prior to sending out the event. This is useful if you want detailed information
		/// about what was actually hit in your OnClick, OnHover, and other event functions.
		/// Note that this is not going to be valid if you're using 2D colliders.
		/// </summary>

		static public RaycastHit lastHit;

		/// <summary>
		/// UICamera that sent out the event.
		/// </summary>

		static public MyMainCamera current = null;

		/// <summary>
		/// Last camera active prior to sending out the event. This will always be the camera that actually sent out the event.
		/// </summary>

		static public Camera currentCamera = null;

		/// <summary>
		/// Current control scheme. Set automatically when events arrive.
		/// </summary>

		static public ControlScheme currentScheme = ControlScheme.Controller;

		/// <summary>
		/// ID of the touch or mouse operation prior to sending out the event. Mouse ID is '-1' for left, '-2' for right mouse button, '-3' for middle.
		/// </summary>

		static public int currentTouchID = -100;

		/// <summary>
		/// Key that triggered the event, if any.
		/// </summary>

		static public KeyCode currentKey = KeyCode.None;

		/// <summary>
		/// Ray projected into the screen underneath the current touch.
		/// </summary>

		static public Ray currentRay {
			get {
				return (currentCamera != null && currentTouch != null) ?
				currentCamera.ScreenPointToRay (currentTouch.pos) : new Ray ();
			}
		}

		/// <summary>
		/// Current touch, set before any event function gets called.
		/// </summary>

		static public MouseOrTouch currentTouch = null;

		/// <summary>
		/// Whether an input field currently has focus.
		/// </summary>

		static public bool inputHasFocus = false;

		// Obsolete, kept for backwards compatibility.
		static GameObject mGenericHandler;

		/// <summary>
		/// If set, this game object will receive all events regardless of whether they were handled or not.
		/// </summary>

		[System.Obsolete ("Use delegates instead such as UICamera.onClick, UICamera.onHover, etc.")]
		static public GameObject genericEventHandler { get { return mGenericHandler; } set { mGenericHandler = value; } }

		/// <summary>
		/// If events don't get handled, they will be forwarded to this game object.
		/// </summary>

		static public GameObject fallThrough;

		public delegate void MoveDelegate (Vector2 delta);

		public delegate void VoidDelegate (GameObject go);

		public delegate void BoolDelegate (GameObject go, bool state);

		public delegate void FloatDelegate (GameObject go, float delta);

		public delegate void VectorDelegate (GameObject go, Vector2 delta);

		public delegate void ObjectDelegate (GameObject go, GameObject obj);

		public delegate void KeyCodeDelegate (GameObject go, KeyCode key);

		/// <summary>
		/// These notifications are sent out prior to the actual event going out.
		/// </summary>

		static public VoidDelegate onClick;
		static public VoidDelegate onDoubleClick;
		static public BoolDelegate onHover;
		static public BoolDelegate onPress;
		static public BoolDelegate onSelect;
		static public FloatDelegate onScroll;
		static public VectorDelegate onDrag;
		static public VoidDelegate onDragStart;
		static public ObjectDelegate onDragOver;
		static public ObjectDelegate onDragOut;
		static public VoidDelegate onDragEnd;
		static public ObjectDelegate onDrop;
		static public KeyCodeDelegate onKey;
		static public BoolDelegate onTooltip;
		static public MoveDelegate onMouseMove;

		// Selected widget (for input)
		static GameObject mCurrentSelection = null;

		// Mouse events
		static MouseOrTouch[] mMouse = new MouseOrTouch[] { new MouseOrTouch (), new MouseOrTouch (), new MouseOrTouch () };

		// The last object to receive OnHover
		static GameObject mHover;

		// Joystick/controller/keyboard event
		static public MouseOrTouch controller = new MouseOrTouch ();

		// Used to ensure that joystick-based controls don't trigger that often
		static float mNextEvent = 0f;

		/// <summary>
		/// List of all the active touches.
		/// </summary>
	
		static public List<MouseOrTouch> activeTouches = new List<MouseOrTouch> ();

		// Used internally to store IDs of active touches
		static List<int> mTouchIDs = new List<int> ();

		// Used to detect screen dimension changes
		static int mWidth = 0;
		static int mHeight = 0;

		// Tooltip widget (mouse only)
		GameObject mTooltip = null;

		// Mouse input is turned off on iOS
		Camera mCam = null;
		float mTooltipTime = 0f;
		float mNextRaycast = 0f;

		/// <summary>
		/// Helper function that determines if this script should be handling the events.
		/// </summary>

		bool handlesEvents { get { return eventHandler == this; } }

		/// <summary>
		/// Caching is always preferable for performance.
		/// </summary>

		#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6
	public Camera cachedCamera { get { if (mCam == null) mCam = camera; return mCam; } }
#else
	public Camera cachedCamera {
			get {
				if (mCam == null)
					mCam = GetComponent<Camera> ();
				return mCam;
			}
		}
		#endif

		/// <summary>
		/// Set to 'true' just before OnDrag-related events are sent. No longer needed, but kept for backwards compatibility.
		/// </summary>

		static public bool isDragging = false;

		/// <summary>
		/// The object hit by the last Raycast that was the result of a mouse or touch event.
		/// </summary>

		static public GameObject hoveredObject;

		/// <summary>
		/// Whether the last raycast was over the UI.
		/// </summary>

		static public bool isOverUI {
			get {
				if (currentTouch != null)
					return currentTouch.isOverUI;
				if (hoveredObject == null)
					return false;
				if (hoveredObject == fallThrough)
					return false;
				return NGUITools.FindInParents<UIRoot> (hoveredObject) != null;
			}
		}

		/// <summary>
		/// Option to manually set the selected game object.
		/// </summary>

		static public GameObject selectedObject {
			get {
				if (mCurrentSelection)
					return mCurrentSelection;
				return null;
			}
			set {
				if (mCurrentSelection == value)
					return;

				bool shouldRestore = false;

				if (currentTouch == null) {
					shouldRestore = true;
					currentTouchID = -100;
					currentTouch = controller;
					currentScheme = ControlScheme.Controller;
				}

				inputHasFocus = false;
				if (onSelect != null)
					onSelect (selectedObject, false);
				Notify (mCurrentSelection, "OnSelect", false);
				mCurrentSelection = value;

				if (mCurrentSelection != null) {
					if (shouldRestore) {
						MyMainCamera cam = (mCurrentSelection != null) ? FindCameraForLayer (mCurrentSelection.layer) : MyMainCamera.list [0];

						if (cam != null) {
							current = cam;
							currentCamera = cam.cachedCamera;
						}
					}

					inputHasFocus = (mCurrentSelection.activeInHierarchy && mCurrentSelection.GetComponent<UIInput> () != null);
					if (onSelect != null)
						onSelect (mCurrentSelection, true);
					Notify (mCurrentSelection, "OnSelect", true);
				}

				if (shouldRestore) {
					current = null;
					currentCamera = null;
					currentTouch = null;
					currentTouchID = -100;
				}
			}
		}

		/// <summary>
		/// Returns 'true' if any of the active touch, mouse or controller is currently holding the specified object.
		/// </summary>

		static public bool IsPressed (GameObject go)
		{
			for (int i = 0; i < 3; ++i)
				if (mMouse [i].pressed == go)
					return true;
			for (int i = 0, imax = activeTouches.Count; i < imax; ++i) {
				MouseOrTouch touch = activeTouches [i];
				if (touch.pressed == go)
					return true;
			}
			if (controller.pressed == go)
				return true;
			return false;
		}

		[System.Obsolete ("Use either 'CountInputSources()' or 'activeTouches.Count'")]
		static public int touchCount { get { return CountInputSources (); } }

		/// <summary>
		/// Number of active touches from all sources.
		/// Note that this will include the sum of touch, mouse and controller events.
		/// If you want only touch events, use activeTouches.Count.
		/// </summary>

		static public int CountInputSources ()
		{
			int count = 0;

			for (int i = 0, imax = activeTouches.Count; i < imax; ++i) {
				MouseOrTouch touch = activeTouches [i];
				if (touch.pressed != null)
					++count;
			}

			for (int i = 0; i < mMouse.Length; ++i)
				if (mMouse [i].pressed != null)
					++count;

			if (controller.pressed != null)
				++count;

			return count;
		}

		/// <summary>
		/// Number of active drag events from all sources.
		/// </summary>

		static public int dragCount {
			get {
				int count = 0;

				for (int i = 0, imax = activeTouches.Count; i < imax; ++i) {
					MouseOrTouch touch = activeTouches [i];
					if (touch.dragged != null)
						++count;
				}

				for (int i = 0; i < mMouse.Length; ++i)
					if (mMouse [i].dragged != null)
						++count;

				if (controller.dragged != null)
					++count;

				return count;
			}
		}

		/// <summary>
		/// Convenience function that returns the main HUD camera.
		/// </summary>

		static public Camera mainCamera {
			get {
				MyMainCamera mouse = eventHandler;
				return (mouse != null) ? mouse.cachedCamera : null;
			}
		}

		/// <summary>
		/// Event handler for all types of events.
		/// </summary>

		static public MyMainCamera eventHandler {
			get {
				for (int i = 0; i < list.size; ++i) {
					// Invalid or inactive entry -- keep going
					MyMainCamera cam = list.buffer [i];
					if (cam == null || !cam.enabled || !NGUITools.GetActive (cam.gameObject))
						continue;
					return cam;
				}
				return null;
			}
		}

		/// <summary>
		/// Static comparison function used for sorting.
		/// </summary>

		static int CompareFunc (MyMainCamera a, MyMainCamera b)
		{
			if (a.cachedCamera.depth < b.cachedCamera.depth)
				return 1;
			if (a.cachedCamera.depth > b.cachedCamera.depth)
				return -1;
			return 0;
		}

		struct DepthEntry
		{
			public int depth;
			public RaycastHit hit;
			public Vector3 point;
			public GameObject go;
		}

		static DepthEntry mHit = new DepthEntry ();
		static BetterList<DepthEntry> mHits = new BetterList<DepthEntry> ();

		/// <summary>
		/// Find the rigidbody on the parent, but return 'null' if a UIPanel is found instead.
		/// The idea is: send events to the rigidbody in the world, but to colliders in the UI.
		/// </summary>

		static Rigidbody FindRootRigidbody (Transform trans)
		{
			while (trans != null) {
				if (trans.GetComponent<UIPanel> () != null)
					return null;
#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6
			Rigidbody rb = trans.rigidbody;
#else
				Rigidbody rb = trans.GetComponent<Rigidbody> ();
#endif
				if (rb != null)
					return rb;
				trans = trans.parent;
			}
			return null;
		}

		/// <summary>
		/// Find the 2D rigidbody on the parent, but return 'null' if a UIPanel is found instead.
		/// </summary>

		static Rigidbody2D FindRootRigidbody2D (Transform trans)
		{
			while (trans != null) {
				if (trans.GetComponent<UIPanel> () != null)
					return null;
#if UNITY_4_3 || UNITY_4_5 || UNITY_4_6
			Rigidbody2D rb = trans.rigidbody2D;
#else
				Rigidbody2D rb = trans.GetComponent<Rigidbody2D> ();
#endif
				if (rb != null)
					return rb;
				trans = trans.parent;
			}
			return null;
		}

		/// <summary>
		/// Returns the object under the specified position.
		/// </summary>

		static public bool Raycast (Vector3 inPos)
		{
			for (int i = 0; i < list.size; ++i) {
				MyMainCamera cam = list.buffer [i];
			
				// Skip inactive scripts
				if (!cam.enabled || !NGUITools.GetActive (cam.gameObject))
					continue;

				// Convert to view space
				currentCamera = cam.cachedCamera;
				Vector3 pos = currentCamera.ScreenToViewportPoint (inPos);
				if (float.IsNaN (pos.x) || float.IsNaN (pos.y))
					continue;

				// If it's outside the camera's viewport, do nothing
				if (pos.x < 0f || pos.x > 1f || pos.y < 0f || pos.y > 1f)
					continue;

				// Cast a ray into the screen
				Ray ray = currentCamera.ScreenPointToRay (inPos);

				// Raycast into the screen
				int mask = currentCamera.cullingMask & (int)cam.eventReceiverMask;
				float dist = (cam.rangeDistance > 0f) ? cam.rangeDistance : currentCamera.farClipPlane - currentCamera.nearClipPlane;

				if (cam.eventType == EventType.World_3D) {
					if (Physics.Raycast (ray, out lastHit, dist, mask)) {
						lastWorldPosition = lastHit.point;
						hoveredObject = lastHit.collider.gameObject;

						if (!list [0].eventsGoToColliders) {
							Rigidbody rb = FindRootRigidbody (hoveredObject.transform);
							if (rb != null)
								hoveredObject = rb.gameObject;
						}
						return true;
					}
					continue;
				} else if (cam.eventType == EventType.UI_3D) {
					RaycastHit[] hits = Physics.RaycastAll (ray, dist, mask);

					if (hits.Length > 1) {
						for (int b = 0; b < hits.Length; ++b) {
							GameObject go = hits [b].collider.gameObject;
							UIWidget w = go.GetComponent<UIWidget> ();

							if (w != null) {
								if (!w.isVisible)
									continue;
								if (w.hitCheck != null && !w.hitCheck (hits [b].point))
									continue;
							} else {
								UIRect rect = NGUITools.FindInParents<UIRect> (go);
								if (rect != null && rect.finalAlpha < 0.001f)
									continue;
							}

							mHit.depth = NGUITools.CalculateRaycastDepth (go);

							if (mHit.depth != int.MaxValue) {
								mHit.hit = hits [b];
								mHit.point = hits [b].point;
								mHit.go = hits [b].collider.gameObject;
								mHits.Add (mHit);
							}
						}

						mHits.Sort (delegate(DepthEntry r1, DepthEntry r2) {
							return r2.depth.CompareTo (r1.depth);
						});

						for (int b = 0; b < mHits.size; ++b) {
#if UNITY_FLASH
						if (IsVisible(mHits.buffer[b]))
#else
							if (IsVisible (ref mHits.buffer [b]))
#endif
						{
								lastHit = mHits [b].hit;
								hoveredObject = mHits [b].go;
								lastWorldPosition = mHits [b].point;
								mHits.Clear ();
								return true;
							}
						}
						mHits.Clear ();
					} else if (hits.Length == 1) {
						GameObject go = hits [0].collider.gameObject;
						UIWidget w = go.GetComponent<UIWidget> ();

						if (w != null) {
							if (!w.isVisible)
								continue;
							if (w.hitCheck != null && !w.hitCheck (hits [0].point))
								continue;
						} else {
							UIRect rect = NGUITools.FindInParents<UIRect> (go);
							if (rect != null && rect.finalAlpha < 0.001f)
								continue;
						}

						if (IsVisible (hits [0].point, hits [0].collider.gameObject)) {
							lastHit = hits [0];
							lastWorldPosition = hits [0].point;
							hoveredObject = lastHit.collider.gameObject;
							return true;
						}
					}
					continue;
				} else if (cam.eventType == EventType.World_2D) {
					if (m2DPlane.Raycast (ray, out dist)) {
						Vector3 point = ray.GetPoint (dist);
						Collider2D c2d = Physics2D.OverlapPoint (point, mask);

						if (c2d) {
							lastWorldPosition = point;
							hoveredObject = c2d.gameObject;

							if (!cam.eventsGoToColliders) {
								Rigidbody2D rb = FindRootRigidbody2D (hoveredObject.transform);
								if (rb != null)
									hoveredObject = rb.gameObject;
							}
							return true;
						}
					}
					continue;
				} else if (cam.eventType == EventType.UI_2D) {
					if (m2DPlane.Raycast (ray, out dist)) {
						lastWorldPosition = ray.GetPoint (dist);
						Collider2D[] hits = Physics2D.OverlapPointAll (lastWorldPosition, mask);

						if (hits.Length > 1) {
							for (int b = 0; b < hits.Length; ++b) {
								GameObject go = hits [b].gameObject;
								UIWidget w = go.GetComponent<UIWidget> ();

								if (w != null) {
									if (!w.isVisible)
										continue;
									if (w.hitCheck != null && !w.hitCheck (lastWorldPosition))
										continue;
								} else {
									UIRect rect = NGUITools.FindInParents<UIRect> (go);
									if (rect != null && rect.finalAlpha < 0.001f)
										continue;
								}

								mHit.depth = NGUITools.CalculateRaycastDepth (go);

								if (mHit.depth != int.MaxValue) {
									mHit.go = go;
									mHit.point = lastWorldPosition;
									mHits.Add (mHit);
								}
							}

							mHits.Sort (delegate(DepthEntry r1, DepthEntry r2) {
								return r2.depth.CompareTo (r1.depth);
							});

							for (int b = 0; b < mHits.size; ++b) {
#if UNITY_FLASH
							if (IsVisible(mHits.buffer[b]))
#else
								if (IsVisible (ref mHits.buffer [b]))
#endif
							{
									hoveredObject = mHits [b].go;
									mHits.Clear ();
									return true;
								}
							}
							mHits.Clear ();
						} else if (hits.Length == 1) {
							GameObject go = hits [0].gameObject;
							UIWidget w = go.GetComponent<UIWidget> ();

							if (w != null) {
								if (!w.isVisible)
									continue;
								if (w.hitCheck != null && !w.hitCheck (lastWorldPosition))
									continue;
							} else {
								UIRect rect = NGUITools.FindInParents<UIRect> (go);
								if (rect != null && rect.finalAlpha < 0.001f)
									continue;
							}

							if (IsVisible (lastWorldPosition, go)) {
								hoveredObject = go;
								return true;
							}
						}
					}
					continue;
				}
			}
			return false;
		}

		static Plane m2DPlane = new Plane (Vector3.back, 0f);

		/// <summary>
		/// Helper function to check if the specified hit is visible by the panel.
		/// </summary>

		static bool IsVisible (Vector3 worldPoint, GameObject go)
		{
			UIPanel panel = NGUITools.FindInParents<UIPanel> (go);

			while (panel != null) {
				if (!panel.IsVisible (worldPoint))
					return false;
				panel = panel.parentPanel;
			}
			return true;
		}

		/// <summary>
		/// Helper function to check if the specified hit is visible by the panel.
		/// </summary>

		#if UNITY_FLASH
	static bool IsVisible (DepthEntry de)
#else
	static bool IsVisible (ref DepthEntry de)
#endif
	{
			UIPanel panel = NGUITools.FindInParents<UIPanel> (de.go);

			while (panel != null) {
				if (!panel.IsVisible (de.point))
					return false;
				panel = panel.parentPanel;
			}
			return true;
		}

		/// <summary>
		/// Whether the specified object should be highlighted.
		/// </summary>

		static public bool IsHighlighted (GameObject go)
		{
			if (MyMainCamera.currentScheme == MyMainCamera.ControlScheme.Mouse)
				return (MyMainCamera.hoveredObject == go);

			if (MyMainCamera.currentScheme == MyMainCamera.ControlScheme.Controller)
				return (MyMainCamera.selectedObject == go);

			return false;
		}

		/// <summary>
		/// Find the camera responsible for handling events on objects of the specified layer.
		/// </summary>

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

			for (int i = 0; i < list.size; ++i) {
				MyMainCamera cam = list.buffer [i];
				Camera uc = cam.cachedCamera;
				if ((uc != null) && (uc.cullingMask & layerMask) != 0)
					return cam;
			}
			return null;
		}

		/// <summary>
		/// Using the keyboard will result in 1 or -1, depending on whether up or down keys have been pressed.
		/// </summary>

		static int GetDirection (KeyCode up, KeyCode down)
		{
			if (GetKeyDown (up))
				return 1;
			if (GetKeyDown (down))
				return -1;
			return 0;
		}

		/// <summary>
		/// Using the keyboard will result in 1 or -1, depending on whether up or down keys have been pressed.
		/// </summary>

		static int GetDirection (KeyCode up0, KeyCode up1, KeyCode down0, KeyCode down1)
		{
			if (GetKeyDown (up0) || GetKeyDown (up1))
				return 1;
			if (GetKeyDown (down0) || GetKeyDown (down1))
				return -1;
			return 0;
		}

		/// <summary>
		/// Using the joystick to move the UI results in 1 or -1 if the threshold has been passed, mimicking up/down keys.
		/// </summary>

		static int GetDirection (string axis)
		{
			float time = RealTime.time;

			if (mNextEvent < time && !string.IsNullOrEmpty (axis)) {
				float val = GetAxis (axis);

				if (val > 0.75f) {
					mNextEvent = time + 0.25f;
					return 1;
				}

				if (val < -0.75f) {
					mNextEvent = time + 0.25f;
					return -1;
				}
			}
			return 0;
		}

		static int mNotifying = 0;

		/// <summary>
		/// Generic notification function. Used in place of SendMessage to shorten the code and allow for more than one receiver.
		/// </summary>

		static public void Notify (GameObject go, string funcName, object obj)
		{
			if (mNotifying > 10)
				return;

			if (NGUITools.GetActive (go)) {
				++mNotifying;
				//NGUIDebug.Log(funcName + "(" + obj + ") on " + (go != null ? go.name : "<null>") + "; " + currentTouchID + ", " + Input.touchCount);
				go.SendMessage (funcName, obj, SendMessageOptions.DontRequireReceiver);
				if (mGenericHandler != null && mGenericHandler != go)
					mGenericHandler.SendMessage (funcName, obj, SendMessageOptions.DontRequireReceiver);
				--mNotifying;
			}
		}

		/// <summary>
		/// Get the details of the specified mouse button.
		/// </summary>

		static public MouseOrTouch GetMouse (int button)
		{
			return mMouse [button];
		}

		/// <summary>
		/// Get or create a touch event. If you are trying to iterate through a list of active touches, use activeTouches instead.
		/// </summary>

		static public MouseOrTouch GetTouch (int id)
		{
			if (id < 0)
				return GetMouse (-id - 1);

			for (int i = 0, imax = mTouchIDs.Count; i < imax; ++i)
				if (mTouchIDs [i] == id)
					return activeTouches [i];

			MouseOrTouch touch = new MouseOrTouch ();
			touch.pressTime = RealTime.time;
			touch.touchBegan = true;
			activeTouches.Add (touch);
			mTouchIDs.Add (id);
			return touch;
		}

		/// <summary>
		/// Remove a touch event from the list.
		/// </summary>

		static public void RemoveTouch (int id)
		{
			for (int i = 0, imax = mTouchIDs.Count; i < imax; ++i) {
				if (mTouchIDs [i] == id) {
					mTouchIDs.RemoveAt (i);
					activeTouches.RemoveAt (i);
					return;
				}
			}
		}

		/// <summary>
		/// Add this camera to the list.
		/// </summary>

		void Awake ()
		{
			mWidth = Screen.width;
			mHeight = Screen.height;

			if (Application.platform == RuntimePlatform.Android ||
			    Application.platform == RuntimePlatform.IPhonePlayer
			    || Application.platform == RuntimePlatform.WP8Player
			    || Application.platform == RuntimePlatform.BlackBerryPlayer) {
				useTouch = true;
				useMouse = false;
				useKeyboard = false;
				useController = false;
			} else if (Application.platform == RuntimePlatform.PS3 ||
			           Application.platform == RuntimePlatform.XBOX360) {
				useMouse = false;
				useTouch = false;
				useKeyboard = false;
				useController = true;
			}

			// Save the starting mouse position
			mMouse [0].pos = Input.mousePosition;

			for (int i = 1; i < 3; ++i) {
				mMouse [i].pos = mMouse [0].pos;
				mMouse [i].lastPos = mMouse [0].pos;
			}
			lastTouchPosition = mMouse [0].pos;
		}

		/// <summary>
		/// Sort the list when enabled.
		/// </summary>

		void OnEnable ()
		{
			list.Add (this);
			list.Sort (CompareFunc);
		}

		/// <summary>
		/// Remove this camera from the list.
		/// </summary>

		void OnDisable ()
		{
			list.Remove (this);
		}

		/// <summary>
		/// We don't want the camera to send out any kind of mouse events.
		/// </summary>
	
		void Start ()
		{
			if (eventType != EventType.World_3D && cachedCamera.transparencySortMode != TransparencySortMode.Orthographic)
				cachedCamera.transparencySortMode = TransparencySortMode.Orthographic;

			if (Application.isPlaying) {
				// Always set a fallthrough object
				if (fallThrough == null) {
					UIRoot root = NGUITools.FindInParents<UIRoot> (gameObject);

					if (root != null) {
						fallThrough = root.gameObject;
					} else {
						Transform t = transform;
						fallThrough = (t.parent != null) ? t.parent.gameObject : gameObject;
					}
				}
				cachedCamera.eventMask = 0;
			}
			if (handlesEvents)
				NGUIDebug.debugRaycast = debug;
		}

		#if UNITY_EDITOR
		void OnValidate ()
		{
			Start ();
		}
		#endif

		/// <summary>
		/// Check the input and send out appropriate events.
		/// </summary>

		public void Update ()
		{
			// Only the first UI layer should be processing events
#if UNITY_EDITOR
			if (!Application.isPlaying || !handlesEvents)
				return;
#else
		if (!handlesEvents) return;
#endif
			current = this;

			// Process touch events first
			if (useTouch)
				ProcessTouches ();
			else if (useMouse)
				ProcessMouse ();

			// Custom input processing
			if (onCustomInput != null)
				onCustomInput ();

			// Clear the selection on the cancel key, but only if mouse input is allowed
			if (useMouse && mCurrentSelection != null) {
				if (cancelKey0 != KeyCode.None && GetKeyDown (cancelKey0)) {
					currentScheme = ControlScheme.Controller;
					currentKey = cancelKey0;
					selectedObject = null;
				} else if (cancelKey1 != KeyCode.None && GetKeyDown (cancelKey1)) {
					currentScheme = ControlScheme.Controller;
					currentKey = cancelKey1;
					selectedObject = null;
				}
			}

			// If nothing is selected, input focus is lost
			if (mCurrentSelection == null) {
				inputHasFocus = false;
			} else if (!mCurrentSelection || !mCurrentSelection.activeInHierarchy) {
				inputHasFocus = false;
				mCurrentSelection = null;
			}

			// Update the keyboard and joystick events
			if ((useKeyboard || useController) && mCurrentSelection != null)
				ProcessOthers ();

			// If it's time to show a tooltip, inform the object we're hovering over
			if (useMouse && mHover != null) {
				float scroll = !string.IsNullOrEmpty (scrollAxisName) ? GetAxis (scrollAxisName) : 0f;

				if (scroll != 0f) {
					if (onScroll != null)
						onScroll (mHover, scroll);
					Notify (mHover, "OnScroll", scroll);
				}

				if (showTooltips && mTooltipTime != 0f && (mTooltipTime < RealTime.time ||
				    GetKey (KeyCode.LeftShift) || GetKey (KeyCode.RightShift))) {
					mTooltip = mHover;
					currentTouch = mMouse [0];
					currentTouchID = -1;
					ShowTooltip (true);
				}
			}

			current = null;
			currentTouchID = -100;
		}

		/// <summary>
		/// Keep an eye on screen size changes.
		/// </summary>

		public void LateUpdate ()
		{
#if UNITY_EDITOR
			if (!Application.isPlaying || !handlesEvents)
				return;
#else
		if (!handlesEvents) return;
#endif
			int w = Screen.width;
			int h = Screen.height;

			if (w != mWidth || h != mHeight) {
				mWidth = w;
				mHeight = h;

				UIRoot.Broadcast ("UpdateAnchors");

				if (onScreenResize != null)
					onScreenResize ();
			}
		}

		/// <summary>
		/// Update mouse input.
		/// </summary>

		public void ProcessMouse ()
		{
			// Is any button currently pressed?
			bool isPressed = false;
			bool justPressed = false;

			for (int i = 0; i < 3; ++i) {
				if (Input.GetMouseButtonDown (i)) {
					currentScheme = ControlScheme.Mouse;
					justPressed = true;
					isPressed = true;
				} else if (Input.GetMouseButton (i)) {
					currentScheme = ControlScheme.Mouse;
					isPressed = true;
				}
			}

			// We're currently using touches -- do nothing
			if (currentScheme == ControlScheme.Touch)
				return;

			// Update the position and delta
			Vector2 pos = Input.mousePosition;
			Vector2 delta = pos - mMouse [0].pos;
			float sqrMag = delta.sqrMagnitude;
			bool posChanged = false;

			if (currentScheme != ControlScheme.Mouse) {
				if (sqrMag < 0.001f)
					return; // Nothing changed and we are not using the mouse -- exit
				currentScheme = ControlScheme.Mouse;
				posChanged = true;
			} else if (sqrMag > 0.001f)
				posChanged = true;

			lastTouchPosition = pos;

			// Propagate the updates to the other mouse buttons
			for (int i = 0; i < 3; ++i) {
				mMouse [i].pos = pos;
				mMouse [i].delta = delta;
			}

			// No need to perform raycasts every frame
			if (isPressed || posChanged || mNextRaycast < RealTime.time) {
				mNextRaycast = RealTime.time + 0.02f;
				if (!Raycast (Input.mousePosition))
					hoveredObject = fallThrough;
				if (hoveredObject == null)
					hoveredObject = mGenericHandler;
				for (int i = 0; i < 3; ++i)
					mMouse [i].current = hoveredObject;
			}

			bool highlightChanged = (mMouse [0].last != mMouse [0].current);
			if (highlightChanged)
				currentScheme = ControlScheme.Mouse;
			currentTouch = mMouse [0];
			currentTouchID = -1;

			if (isPressed) {
				// A button was pressed -- cancel the tooltip
				mTooltipTime = 0f;
			} else if (posChanged && (!stickyTooltip || highlightChanged)) {
				if (mTooltipTime != 0f) {
					// Delay the tooltip
					mTooltipTime = RealTime.time + tooltipDelay;
				} else if (mTooltip != null) {
					// Hide the tooltip
					ShowTooltip (false);
				}
			}

			// Generic mouse move notifications
			if (posChanged && onMouseMove != null) {
				onMouseMove (currentTouch.delta);
				currentTouch = null;
			}

			// The button was released over a different object -- remove the highlight from the previous
			if ((justPressed || !isPressed) && mHover != null && highlightChanged) {
				if (mTooltip != null)
					ShowTooltip (false);
				if (onHover != null)
					onHover (mHover, false);
				Notify (mHover, "OnHover", false);
				mHover = null;
			}

			// Process all 3 mouse buttons as individual touches
			for (int i = 0; i < 3; ++i) {
				bool pressed = Input.GetMouseButtonDown (i);
				bool unpressed = Input.GetMouseButtonUp (i);
				if (pressed || unpressed)
					currentScheme = ControlScheme.Mouse;
				currentTouch = mMouse [i];

#if UNITY_STANDALONE_OSX || UNITY_EDITOR_OSX
				if (commandClick && i == 0 && (Input.GetKey (KeyCode.LeftControl) || Input.GetKey (KeyCode.RightControl))) {
					currentTouchID = -2;
					currentKey = KeyCode.Mouse1;
				} else
#endif
			{
					currentTouchID = -1 - i;
					currentKey = KeyCode.Mouse0 + i;
				}
	
				// We don't want to update the last camera while there is a touch happening
				if (pressed) {
					currentTouch.pressedCam = currentCamera;
					currentTouch.pressTime = RealTime.time;
				} else if (currentTouch.pressed != null)
					currentCamera = currentTouch.pressedCam;
	
				// Process the mouse events
				ProcessTouch (pressed, unpressed);
				currentKey = KeyCode.None;
			}

			// If nothing is pressed and there is an object under the touch, highlight it
			if (!isPressed && highlightChanged) {
				currentScheme = ControlScheme.Mouse;
				mTooltipTime = RealTime.time + tooltipDelay;
				mHover = mMouse [0].current;
				currentTouch = mMouse [0];
				currentTouchID = -1;
				if (onHover != null)
					onHover (mHover, true);
				Notify (mHover, "OnHover", true);
			}
			currentTouch = null;

			// Update the last value
			mMouse [0].last = mMouse [0].current;
			for (int i = 1; i < 3; ++i)
				mMouse [i].last = mMouse [0].last;
		}

		static bool mUsingTouchEvents = true;

		public class Touch
		{
			public int fingerId;
			public TouchPhase phase = TouchPhase.Began;
			public Vector2 position;
			public int tapCount = 0;
		}

		public delegate int GetTouchCountCallback ();

		public delegate Touch GetTouchCallback (int index);

		static public GetTouchCountCallback GetInputTouchCount;
		static public GetTouchCallback GetInputTouch;

		/// <summary>
		/// Update touch-based events.
		/// </summary>
	
		int oldTouchCount = 0;
		// add by chenbin
		public void ProcessTouches ()
		{
			int count = (GetInputTouchCount == null) ? Input.touchCount : GetInputTouchCount ();

			for (int i = 0; i < count; ++i) {
				int fingerId;
				TouchPhase phase;
				Vector2 position;
				int tapCount;

				if (GetInputTouch == null) {
					UnityEngine.Touch touch = Input.GetTouch (i);
					phase = touch.phase;
					fingerId = touch.fingerId;
					position = touch.position;
					tapCount = touch.tapCount;
				} else {
					Touch touch = GetInputTouch (i);
					phase = touch.phase;
					fingerId = touch.fingerId;
					position = touch.position;
					tapCount = touch.tapCount;
				}

				currentTouchID = allowMultiTouch ? fingerId : 1;
				currentTouch = GetTouch (currentTouchID);

				bool pressed = (phase == TouchPhase.Began) || currentTouch.touchBegan;
				bool unpressed = (phase == TouchPhase.Canceled) || (phase == TouchPhase.Ended);
				currentTouch.touchBegan = false;

				// Assume touch-based control
				currentScheme = ControlScheme.Touch;

				// Although input.deltaPosition can be used, calculating it manually is safer (just in case)
//			currentTouch.delta = pressed ? Vector2.zero : position - currentTouch.pos;
				#region modify by chenbin
				if (Input.touchCount == oldTouchCount) {
					currentTouch.delta = pressed ? Vector2.zero : position - currentTouch.pos;
				} else {
					currentTouch.delta = Vector2.zero;
				}
				#endregion
				currentTouch.pos = position;

				// Raycast into the screen
				if (!Raycast (currentTouch.pos))
					hoveredObject = fallThrough;
				if (hoveredObject == null)
					hoveredObject = mGenericHandler;
				currentTouch.last = currentTouch.current;
				currentTouch.current = hoveredObject;
				lastTouchPosition = currentTouch.pos;

				// We don't want to update the last camera while there is a touch happening
				if (pressed)
					currentTouch.pressedCam = currentCamera;
				else if (currentTouch.pressed != null)
					currentCamera = currentTouch.pressedCam;

				// Double-tap support
				if (tapCount > 1)
					currentTouch.clickTime = RealTime.time;

				// Process the events from this touch
				ProcessTouch (pressed, unpressed);

				// If the touch has ended, remove it from the list
				if (unpressed)
					RemoveTouch (currentTouchID);

				currentTouch.last = null;
				currentTouch = null;

				// Don't consider other touches
				if (!allowMultiTouch)
					break;
			}

			if (count == 0) {
				// Skip the first frame after using touch events
				if (mUsingTouchEvents) {
					mUsingTouchEvents = false;
					return;
				}

				if (useMouse)
					ProcessMouse ();
#if UNITY_EDITOR
			else if (GetInputTouch == null)
					ProcessFakeTouches ();
#endif
			} else
				mUsingTouchEvents = true;

			oldTouchCount = count;  // add by chenbin
		}

		/// <summary>
		/// Process fake touch events where the mouse acts as a touch device.
		/// Useful for testing mobile functionality in the editor.
		/// </summary>

		void ProcessFakeTouches ()
		{
			bool pressed = Input.GetMouseButtonDown (0);
			bool unpressed = Input.GetMouseButtonUp (0);
			bool held = Input.GetMouseButton (0);

			if (pressed || unpressed || held) {
				currentTouchID = 1;
				currentTouch = mMouse [0];
				currentTouch.touchBegan = pressed;
				if (pressed)
					currentTouch.pressTime = RealTime.time;

				Vector2 pos = Input.mousePosition;
				currentTouch.delta = pressed ? Vector2.zero : pos - currentTouch.pos;
				currentTouch.pos = pos;

				// Raycast into the screen
				if (!Raycast (currentTouch.pos))
					hoveredObject = fallThrough;
				if (hoveredObject == null)
					hoveredObject = mGenericHandler;
				currentTouch.last = currentTouch.current;
				currentTouch.current = hoveredObject;
				lastTouchPosition = currentTouch.pos;

				// We don't want to update the last camera while there is a touch happening
				if (pressed)
					currentTouch.pressedCam = currentCamera;
				else if (currentTouch.pressed != null)
					currentCamera = currentTouch.pressedCam;

				// Process the events from this touch
				ProcessTouch (pressed, unpressed);

				// If the touch has ended, remove it from the list
				if (unpressed)
					RemoveTouch (currentTouchID);
				currentTouch.last = null;
				currentTouch = null;
			}
		}

		/// <summary>
		/// Process keyboard and joystick events.
		/// </summary>

		public void ProcessOthers ()
		{
			currentTouchID = -100;
			currentTouch = controller;

			bool submitKeyDown = false;
			bool submitKeyUp = false;

			if (submitKey0 != KeyCode.None && GetKeyDown (submitKey0)) {
				currentKey = submitKey0;
				submitKeyDown = true;
			}

			if (submitKey1 != KeyCode.None && GetKeyDown (submitKey1)) {
				currentKey = submitKey1;
				submitKeyDown = true;
			}

			if (submitKey0 != KeyCode.None && GetKeyUp (submitKey0)) {
				currentKey = submitKey0;
				submitKeyUp = true;
			}

			if (submitKey1 != KeyCode.None && GetKeyUp (submitKey1)) {
				currentKey = submitKey1;
				submitKeyUp = true;
			}

			if (submitKeyDown)
				currentTouch.pressTime = RealTime.time;

			if (submitKeyDown || submitKeyUp) {
				currentScheme = ControlScheme.Controller;
				currentTouch.last = currentTouch.current;
				currentTouch.current = mCurrentSelection;
				ProcessTouch (submitKeyDown, submitKeyUp);
				currentTouch.last = null;
			}

			int vertical = 0;
			int horizontal = 0;

			if (useKeyboard) {
				if (inputHasFocus) {
					vertical += GetDirection (KeyCode.UpArrow, KeyCode.DownArrow);
					horizontal += GetDirection (KeyCode.RightArrow, KeyCode.LeftArrow);
				} else {
					vertical += GetDirection (KeyCode.W, KeyCode.UpArrow, KeyCode.S, KeyCode.DownArrow);
					horizontal += GetDirection (KeyCode.D, KeyCode.RightArrow, KeyCode.A, KeyCode.LeftArrow);
				}
			}

			if (useController) {
				if (!string.IsNullOrEmpty (verticalAxisName))
					vertical += GetDirection (verticalAxisName);
				if (!string.IsNullOrEmpty (horizontalAxisName))
					horizontal += GetDirection (horizontalAxisName);
			}

			// Send out key notifications
			if (vertical != 0) {
				currentScheme = ControlScheme.Controller;
				KeyCode key = vertical > 0 ? KeyCode.UpArrow : KeyCode.DownArrow;
				if (onKey != null)
					onKey (mCurrentSelection, key);
				Notify (mCurrentSelection, "OnKey", key);
			}
		
			if (horizontal != 0) {
				currentScheme = ControlScheme.Controller;
				KeyCode key = horizontal > 0 ? KeyCode.RightArrow : KeyCode.LeftArrow;
				if (onKey != null)
					onKey (mCurrentSelection, key);
				Notify (mCurrentSelection, "OnKey", key);
			}
		
			if (useKeyboard && GetKeyDown (KeyCode.Tab)) {
				currentKey = KeyCode.Tab;
				currentScheme = ControlScheme.Controller;
				if (onKey != null)
					onKey (mCurrentSelection, KeyCode.Tab);
				Notify (mCurrentSelection, "OnKey", KeyCode.Tab);
			}

			// Send out the cancel key notification
			if (cancelKey0 != KeyCode.None && GetKeyDown (cancelKey0)) {
				currentKey = cancelKey0;
				currentScheme = ControlScheme.Controller;
				if (onKey != null)
					onKey (mCurrentSelection, KeyCode.Escape);
				Notify (mCurrentSelection, "OnKey", KeyCode.Escape);
			}

			if (cancelKey1 != KeyCode.None && GetKeyDown (cancelKey1)) {
				currentKey = cancelKey1;
				currentScheme = ControlScheme.Controller;
				if (onKey != null)
					onKey (mCurrentSelection, KeyCode.Escape);
				Notify (mCurrentSelection, "OnKey", KeyCode.Escape);
			}

			currentTouch = null;
			currentKey = KeyCode.None;
		}

		/// <summary>
		/// Process the press part of a touch.
		/// </summary>

		void ProcessPress (bool pressed, float click, float drag)
		{
			// Send out the press message
			if (pressed) {
				if (mTooltip != null)
					ShowTooltip (false);
				currentTouch.pressStarted = true;
				if (onPress != null && currentTouch.pressed)
					onPress (currentTouch.pressed, false);

				Notify (currentTouch.pressed, "OnPress", false);

				currentTouch.pressed = currentTouch.current;
				currentTouch.dragged = currentTouch.current;
				currentTouch.clickNotification = ClickNotification.BasedOnDelta;
				currentTouch.totalDelta = Vector2.zero;
				currentTouch.dragStarted = false;

				if (onPress != null && currentTouch.pressed)
					onPress (currentTouch.pressed, true);

				Notify (currentTouch.pressed, "OnPress", true);

				if (mTooltip != null)
					ShowTooltip (false);
				selectedObject = currentTouch.pressed;
			} else if (currentTouch.pressed != null && (currentTouch.delta.sqrMagnitude != 0f || currentTouch.current != currentTouch.last)) {
				// Keep track of the total movement
				currentTouch.totalDelta += currentTouch.delta;
				float mag = currentTouch.totalDelta.sqrMagnitude;
				bool justStarted = false;

				// If the drag process hasn't started yet but we've already moved off the object, start it immediately
				if (!currentTouch.dragStarted && currentTouch.last != currentTouch.current) {
					currentTouch.dragStarted = true;
					currentTouch.delta = currentTouch.totalDelta;

					// OnDragOver is sent for consistency, so that OnDragOut is always preceded by OnDragOver
					isDragging = true;

					if (onDragStart != null)
						onDragStart (currentTouch.dragged);
					Notify (currentTouch.dragged, "OnDragStart", null);

					if (onDragOver != null)
						onDragOver (currentTouch.last, currentTouch.dragged);
					Notify (currentTouch.last, "OnDragOver", currentTouch.dragged);

					isDragging = false;
				} else if (!currentTouch.dragStarted && drag < mag) {
					// If the drag event has not yet started, see if we've dragged the touch far enough to start it
					justStarted = true;
					currentTouch.dragStarted = true;
					currentTouch.delta = currentTouch.totalDelta;
				}

				// If we're dragging the touch, send out drag events
				if (currentTouch.dragStarted) {
					if (mTooltip != null)
						ShowTooltip (false);

					isDragging = true;
					bool isDisabled = (currentTouch.clickNotification == ClickNotification.None);

					if (justStarted) {
						if (onDragStart != null)
							onDragStart (currentTouch.dragged);
						Notify (currentTouch.dragged, "OnDragStart", null);

						if (onDragOver != null)
							onDragOver (currentTouch.last, currentTouch.dragged);
						Notify (currentTouch.current, "OnDragOver", currentTouch.dragged);
					} else if (currentTouch.last != currentTouch.current) {
						if (onDragStart != null)
							onDragStart (currentTouch.dragged);
						Notify (currentTouch.last, "OnDragOut", currentTouch.dragged);

						if (onDragOver != null)
							onDragOver (currentTouch.last, currentTouch.dragged);
						Notify (currentTouch.current, "OnDragOver", currentTouch.dragged);
					}

					if (onDrag != null)
						onDrag (currentTouch.dragged, currentTouch.delta);
					Notify (currentTouch.dragged, "OnDrag", currentTouch.delta);

					currentTouch.last = currentTouch.current;
					isDragging = false;

					if (isDisabled) {
						// If the notification status has already been disabled, keep it as such
						currentTouch.clickNotification = ClickNotification.None;
					} else if (currentTouch.clickNotification == ClickNotification.BasedOnDelta && click < mag) {
						// We've dragged far enough to cancel the click
						currentTouch.clickNotification = ClickNotification.None;
					}
				}
			}
		}

		/// <summary>
		/// Process the release part of a touch.
		/// </summary>
		#region add by chenbin
	public  float dragThreshold {
			get {
				bool isMouse = (currentScheme == ControlScheme.Mouse);
				float drag = isMouse ? mouseDragThreshold : touchDragThreshold;
				return drag;
			}
		}

		public void ProcessRelease ()
		{
			bool isMouse = (currentScheme == ControlScheme.Mouse);
			float drag = isMouse ? mouseDragThreshold : touchDragThreshold;
			// So we can use sqrMagnitude below
			drag *= drag;
			ProcessRelease (isMouse, drag);
		}

		#endregion

		void ProcessRelease (bool isMouse, float drag)
		{
			// Send out the unpress message
			if (currentTouch == null)
				return;
			currentTouch.pressStarted = false;
			//if (mTooltip != null) ShowTooltip(false);

			if (currentTouch.pressed != null) {
				// If there was a drag event in progress, make sure OnDragOut gets sent
				if (currentTouch.dragStarted) {
					if (onDragOut != null)
						onDragOut (currentTouch.last, currentTouch.dragged);
					Notify (currentTouch.last, "OnDragOut", currentTouch.dragged);

					if (onDragEnd != null)
						onDragEnd (currentTouch.dragged);
					Notify (currentTouch.dragged, "OnDragEnd", null);
				}

				// Send the notification of a touch ending
				if (onPress != null)
					onPress (currentTouch.pressed, false);
				Notify (currentTouch.pressed, "OnPress", false);
            
				// Send a hover message to the object
				if (isMouse) {
					if (onHover != null)
						onHover (currentTouch.current, true);
					Notify (currentTouch.current, "OnHover", true);
				}
				mHover = currentTouch.current;
            
				// If the button/touch was released on the same object, consider it a click and select it
				if (currentTouch.dragged == currentTouch.current ||
				    (currentScheme != ControlScheme.Controller &&
				    currentTouch.clickNotification != ClickNotification.None &&
				    currentTouch.totalDelta.sqrMagnitude < drag)) {
					// If the touch should consider clicks, send out an OnClick notification
					if (currentTouch.clickNotification != ClickNotification.None && currentTouch.pressed == currentTouch.current) {
						float time = RealTime.time;

						if (onClick != null)
							onClick (currentTouch.pressed);
						Notify (currentTouch.pressed, "OnClick", null);

						if (currentTouch.clickTime + 0.35f > time) {
							if (onDoubleClick != null)
								onDoubleClick (currentTouch.pressed);
							Notify (currentTouch.pressed, "OnDoubleClick", null);
						}
						currentTouch.clickTime = time;
					}
				} else if (currentTouch.dragStarted) { // The button/touch was released on a different object
					// Send a drop notification (for drag & drop)
					if (onDrop != null)
						onDrop (currentTouch.current, currentTouch.dragged);
					Notify (currentTouch.current, "OnDrop", currentTouch.dragged);
				}
			}
			currentTouch.dragStarted = false;
			currentTouch.pressed = null;
			currentTouch.dragged = null;
		}

		/// <summary>
		/// Process the events of the specified touch.
		/// </summary>

		public void ProcessTouch (bool pressed, bool released)
		{
			// Whether we're using the mouse
			bool isMouse = (currentScheme == ControlScheme.Mouse);
			float drag = isMouse ? mouseDragThreshold : touchDragThreshold;
			float click = isMouse ? mouseClickThreshold : touchClickThreshold;

			// So we can use sqrMagnitude below
			drag *= drag;
			click *= click;

			if (currentTouch.pressed != null) {
				if (released)
					ProcessRelease (isMouse, drag);
				ProcessPress (pressed, click, drag);

				// Hold event = show tooltip
				if (currentTouch.pressed == currentTouch.current &&
				    currentTouch.clickNotification != ClickNotification.None &&
				    !currentTouch.dragStarted && currentTouch.deltaTime > tooltipDelay) {
					currentTouch.clickNotification = ClickNotification.None;

					if (longPressTooltip) {
						mTooltip = currentTouch.pressed;
						ShowTooltip (true);
					}
					Notify (currentTouch.current, "OnLongPress", null);
				}
			} else if (isMouse || pressed || released) {
				ProcessPress (pressed, click, drag);
				if (released)
					ProcessRelease (isMouse, drag);
			}
        
			//modify by chenbin
			if (isbeControled && released) {
				enabled = false;
			}
		}

		/// <summary>
		/// Show or hide the tooltip.
		/// </summary>

		public void ShowTooltip (bool val)
		{
			mTooltipTime = 0f;
			if (onTooltip != null)
				onTooltip (mTooltip, val);
			Notify (mTooltip, "OnTooltip", val);
			if (!val)
				mTooltip = null;
		}
	}
}