add

Assets/CoolapeFrame/3rd/NGUI_Enhance/Scripts/Interaction/UIDragDropRoot.cs

@@ -0,0 +1,21 @@
+//----------------------------------------------
+//            NGUI: Next-Gen UI kit
+// Copyright © 2011-2015 Tasharen Entertainment
+//----------------------------------------------
+
+using UnityEngine;
+
+/// <summary>
+/// When Drag & Drop event begins in UIDragDropItem, it will re-parent itself to the UIDragDropRoot instead.
+/// It's useful when you're dragging something out of a clipped panel: you will want to reparent it before
+/// it can be dragged outside.
+/// </summary>
+
+[AddComponentMenu("NGUI/Interaction/Drag and Drop Root")]
+public class UIDragDropRoot : MonoBehaviour
+{
+	static public Transform root;
+
+	void OnEnable () { root = transform; }
+	void OnDisable () { if (root == transform) root = null; }
+}