text: /*!
   * Ext JS Library 3.1.0
   * Copyright(c) 2006-2009 Ext JS, LLC
   * licensing@extjs.com
   * http://www.extjs.com/license
   */
  /*
   * These classes are derivatives of the similarly named classes in the YUI Library.
   * The original license:
   * Copyright (c) 2006, Yahoo! Inc. All rights reserved.
   * Code licensed under the BSD License:
   * http://developer.yahoo.net/yui/license.txt
   */
  
  (function() {
  
  var Event=Ext.EventManager;
  var Dom=Ext.lib.Dom;
  
  /**
   * @class Ext.dd.DragDrop
   * Defines the interface and base operation of items that that can be
   * dragged or can be drop targets.  It was designed to be extended, overriding
   * the event handlers for startDrag, onDrag, onDragOver and onDragOut.
   * Up to three html elements can be associated with a DragDrop instance:
   * <ul>
   * <li>linked element: the element that is passed into the constructor.
   * This is the element which defines the boundaries for interaction with
   * other DragDrop objects.</li>
   * <li>handle element(s): The drag operation only occurs if the element that
   * was clicked matches a handle element.  By default this is the linked
   * element, but there are times that you will want only a portion of the
   * linked element to initiate the drag operation, and the setHandleElId()
   * method provides a way to define this.</li>
   * <li>drag element: this represents the element that would be moved along
   * with the cursor during a drag operation.  By default, this is the linked
   * element itself as in {@link Ext.dd.DD}.  setDragElId() lets you define
   * a separate element that would be moved, as in {@link Ext.dd.DDProxy}.
   * </li>
   * </ul>
   * This class should not be instantiated until the onload event to ensure that
   * the associated elements are available.
   * The following would define a DragDrop obj that would interact with any
   * other DragDrop obj in the "group1" group:
   * <pre>
   *  dd = new Ext.dd.DragDrop("div1", "group1");
   * </pre>
   * Since none of the event handlers have been implemented, nothing would
   * actually happen if you were to run the code above.  Normally you would
   * override this class or one of the default implementations, but you can
   * also override the methods you want on an instance of the class...
   * <pre>
   *  dd.onDragDrop = function(e, id) {
   *  &nbsp;&nbsp;alert("dd was dropped on " + id);
   *  }
   * </pre>
   * @constructor
   * @param {String} id of the element that is linked to this instance
   * @param {String} sGroup the group of related DragDrop objects
   * @param {object} config an object containing configurable attributes
   *                Valid properties for DragDrop:
   *                    padding, isTarget, maintainOffset, primaryButtonOnly
   */
  Ext.dd.DragDrop = function(id, sGroup, config) {
      if(id) {
          this.init(id, sGroup, config);
      }
  };
  
  Ext.dd.DragDrop.prototype = {
  
      /**
       * Set to false to enable a DragDrop object to fire drag events while dragging
       * over its own Element. Defaults to true - DragDrop objects do not by default
       * fire drag events to themselves.
       * @property ignoreSelf
       * @type Boolean
       */
  
      /**
       * The id of the element associated with this object.  This is what we
       * refer to as the "linked element" because the size and position of
       * this element is used to determine when the drag and drop objects have
       * interacted.
       * @property id
       * @type String
       */
      id: null,
  
      /**
       * Configuration attributes passed into the constructor
       * @property config
       * @type object
       */
      config: null,
  
      /**
       * The id of the element that will be dragged.  By default this is same
       * as the linked element , but could be changed to another element. Ex:
       * Ext.dd.DDProxy
       * @property dragElId
       * @type String
       * @private
       */
      dragElId: null,
  
      /**
       * The ID of the element that initiates the drag operation.  By default
       * this is the linked element, but could be changed to be a child of this
       * element.  This lets us do things like only starting the drag when the
       * header element within the linked html element is clicked.
       * @property handleElId
       * @type String
       * @private
       */
      handleElId: null,
  
      /**
       * An object who's property names identify HTML tags to be considered invalid as drag handles.
       * A non-null property value identifies the tag as invalid. Defaults to the 
       * following value which prevents drag operations from being initiated by &lt;a> elements:<pre><code>
  {
      A: "A"
  }</code></pre>
       * @property invalidHandleTypes
       * @type Object
       */
      invalidHandleTypes: null,
  
      /**
       * An object who's property names identify the IDs of elements to be considered invalid as drag handles.
       * A non-null property value identifies the ID as invalid. For example, to prevent
       * dragging from being initiated on element ID "foo", use:<pre><code>
  {
      foo: true
  }</code></pre>
       * @property invalidHandleIds
       * @type Object
       */
      invalidHandleIds: null,
  
      /**
       * An Array of CSS class names for elements to be considered in valid as drag handles.
       * @property invalidHandleClasses
       * @type Array
       */
      invalidHandleClasses: null,
  
      /**
       * The linked element's absolute X position at the time the drag was
       * started
       * @property startPageX
       * @type int
       * @private
       */
      startPageX: 0,
  
      /**
       * The linked element's absolute X position at the time the drag was
       * started
       * @property startPageY
       * @type int
       * @private
       */
      startPageY: 0,
  
      /**
       * The group defines a logical collection of DragDrop objects that are
       * related.  Instances only get events when interacting with other
       * DragDrop object in the same group.  This lets us define multiple
       * groups using a single DragDrop subclass if we want.
       * @property groups
       * @type object An object in the format {'group1':true, 'group2':true}
       */
      groups: null,
  
      /**
       * Individual drag/drop instances can be locked.  This will prevent
       * onmousedown start drag.
       * @property locked
       * @type boolean
       * @private
       */
      locked: false,
  
      /**
       * Lock this instance
       * @method lock
       */
      lock: function() { this.locked = true; },
  
      /**
       * When set to true, other DD objects in cooperating DDGroups do not receive
       * notification events when this DD object is dragged over them. Defaults to false.
       * @property moveOnly
       * @type boolean
       */
      moveOnly: false,
  
      /**
       * Unlock this instace
       * @method unlock
       */
      unlock: function() { this.locked = false; },
  
      /**
       * By default, all instances can be a drop target.  This can be disabled by
       * setting isTarget to false.
       * @property isTarget
       * @type boolean
       */
      isTarget: true,
  
      /**
       * The padding configured for this drag and drop object for calculating
       * the drop zone intersection with this object.
       * @property padding
       * @type int[] An array containing the 4 padding values: [top, right, bottom, left]
       */
      padding: null,
  
      /**
       * Cached reference to the linked element
       * @property _domRef
       * @private
       */
      _domRef: null,
  
      /**
       * Internal typeof flag
       * @property __ygDragDrop
       * @private
       */
      __ygDragDrop: true,
  
      /**
       * Set to true when horizontal contraints are applied
       * @property constrainX
       * @type boolean
       * @private
       */
      constrainX: false,
  
      /**
       * Set to true when vertical contraints are applied
       * @property constrainY
       * @type boolean
       * @private
       */
      constrainY: false,
  
      /**
       * The left constraint
       * @property minX
       * @type int
       * @private
       */
      minX: 0,
  
      /**
       * The right constraint
       * @property maxX
       * @type int
       * @private
       */
      maxX: 0,
  
      /**
       * The up constraint
       * @property minY
       * @type int
       * @type int
       * @private
       */
      minY: 0,
  
      /**
       * The down constraint
       * @property maxY
       * @type int
       * @private
       */
      maxY: 0,
  
      /**
       * Maintain offsets when we resetconstraints.  Set to true when you want
       * the position of the element relative to its parent to stay the same
       * when the page changes
       *
       * @property maintainOffset
       * @type boolean
       */
      maintainOffset: false,
  
      /**
       * Array of pixel locations the element will snap to if we specified a
       * horizontal graduation/interval.  This array is generated automatically
       * when you define a tick interval.
       * @property xTicks
       * @type int[]
       */
      xTicks: null,
  
      /**
       * Array of pixel locations the element will snap to if we specified a
       * vertical graduation/interval.  This array is generated automatically
       * when you define a tick interval.
       * @property yTicks
       * @type int[]
       */
      yTicks: null,
  
      /**
       * By default the drag and drop instance will only respond to the primary
       * button click (left button for a right-handed mouse).  Set to true to
       * allow drag and drop to start with any mouse click that is propogated
       * by the browser
       * @property primaryButtonOnly
       * @type boolean
       */
      primaryButtonOnly: true,
  
      /**
       * The availabe property is false until the linked dom element is accessible.
       * @property available
       * @type boolean
       */
      available: false,
  
      /**
       * By default, drags can only be initiated if the mousedown occurs in the
       * region the linked element is.  This is done in part to work around a
       * bug in some browsers that mis-report the mousedown if the previous
       * mouseup happened outside of the window.  This property is set to true
       * if outer handles are defined.
       *
       * @property hasOuterHandles
       * @type boolean
       * @default false
       */
      hasOuterHandles: false,
  
      /**
       * Code that executes immediately before the startDrag event
       * @method b4StartDrag
       * @private
       */
      b4StartDrag: function(x, y) { },
  
      /**
       * Abstract method called after a drag/drop object is clicked
       * and the drag or mousedown time thresholds have beeen met.
       * @method startDrag
       * @param {int} X click location
       * @param {int} Y click location
       */
      startDrag: function(x, y) { /* override this */ },
  
      /**
       * Code that executes immediately before the onDrag event
       * @method b4Drag
       * @private
       */
      b4Drag: function(e) { },
  
      /**
       * Abstract method called during the onMouseMove event while dragging an
       * object.
       * @method onDrag
       * @param {Event} e the mousemove event
       */
      onDrag: function(e) { /* override this */ },
  
      /**
       * Abstract method called when this element fist begins hovering over
       * another DragDrop obj
       * @method onDragEnter
       * @param {Event} e the mousemove event
       * @param {String|DragDrop[]} id In POINT mode, the element
       * id this is hovering over.  In INTERSECT mode, an array of one or more
       * dragdrop items being hovered over.
       */
      onDragEnter: function(e, id) { /* override this */ },
  
      /**
       * Code that executes immediately before the onDragOver event
       * @method b4DragOver
       * @private
       */
      b4DragOver: function(e) { },
  
      /**
       * Abstract method called when this element is hovering over another
       * DragDrop obj
       * @method onDragOver
       * @param {Event} e the mousemove event
       * @param {String|DragDrop[]} id In POINT mode, the element
       * id this is hovering over.  In INTERSECT mode, an array of dd items
       * being hovered over.
       */
      onDragOver: function(e, id) { /* override this */ },
  
      /**
       * Code that executes immediately before the onDragOut event
       * @method b4DragOut
       * @private
       */
      b4DragOut: function(e) { },
  
      /**
       * Abstract method called when we are no longer hovering over an element
       * @method onDragOut
       * @param {Event} e the mousemove event
       * @param {String|DragDrop[]} id In POINT mode, the element
       * id this was hovering over.  In INTERSECT mode, an array of dd items
       * that the mouse is no longer over.
       */
      onDragOut: function(e, id) { /* override this */ },
  
      /**
       * Code that executes immediately before the onDragDrop event
       * @method b4DragDrop
       * @private
       */
      b4DragDrop: function(e) { },
  
      /**
       * Abstract method called when this item is dropped on another DragDrop
       * obj
       * @method onDragDrop
       * @param {Event} e the mouseup event
       * @param {String|DragDrop[]} id In POINT mode, the element
       * id this was dropped on.  In INTERSECT mode, an array of dd items this
       * was dropped on.
       */
      onDragDrop: function(e, id) { /* override this */ },
  
      /**
       * Abstract method called when this item is dropped on an area with no
       * drop target
       * @method onInvalidDrop
       * @param {Event} e the mouseup event
       */
      onInvalidDrop: function(e) { /* override this */ },
  
      /**
       * Code that executes immediately before the endDrag event
       * @method b4EndDrag
       * @private
       */
      b4EndDrag: function(e) { },
  
      /**
       * Fired when we are done dragging the object
       * @method endDrag
       * @param {Event} e the mouseup event
       */
      endDrag: function(e) { /* override this */ },
  
      /**
       * Code executed immediately before the onMouseDown event
       * @method b4MouseDown
       * @param {Event} e the mousedown event
       * @private
       */
      b4MouseDown: function(e) {  },
  
      /**
       * Event handler that fires when a drag/drop obj gets a mousedown
       * @method onMouseDown
       * @param {Event} e the mousedown event
       */
      onMouseDown: function(e) { /* override this */ },
  
      /**
       * Event handler that fires when a drag/drop obj gets a mouseup
       * @method onMouseUp
       * @param {Event} e the mouseup event
       */
      onMouseUp: function(e) { /* override this */ },
  
      /**
       * Override the onAvailable method to do what is needed after the initial
       * position was determined.
       * @method onAvailable
       */
      onAvailable: function () {
      },
  
      /**
       * Provides default constraint padding to "constrainTo" elements (defaults to {left: 0, right:0, top:0, bottom:0}).
       * @type Object
       */
      defaultPadding : {left:0, right:0, top:0, bottom:0},
  
      /**
       * Initializes the drag drop object's constraints to restrict movement to a certain element.
   *
   * Usage:
   <pre><code>
   var dd = new Ext.dd.DDProxy("dragDiv1", "proxytest",
                  { dragElId: "existingProxyDiv" });
   dd.startDrag = function(){
       this.constrainTo("parent-id");
   };
   </code></pre>
   * Or you can initalize it using the {@link Ext.Element} object:
   <pre><code>
   Ext.get("dragDiv1").initDDProxy("proxytest", {dragElId: "existingProxyDiv"}, {
       startDrag : function(){
           this.constrainTo("parent-id");
       }
   });
   </code></pre>
       * @param {Mixed} constrainTo The element to constrain to.
       * @param {Object/Number} pad (optional) Pad provides a way to specify "padding" of the constraints,
       * and can be either a number for symmetrical padding (4 would be equal to {left:4, right:4, top:4, bottom:4}) or
       * an object containing the sides to pad. For example: {right:10, bottom:10}
       * @param {Boolean} inContent (optional) Constrain the draggable in the content box of the element (inside padding and borders)
       */
      constrainTo : function(constrainTo, pad, inContent){
          if(Ext.isNumber(pad)){
              pad = {left: pad, right:pad, top:pad, bottom:pad};
          }
          pad = pad || this.defaultPadding;
          var b = Ext.get(this.getEl()).getBox(),
              ce = Ext.get(constrainTo),
              s = ce.getScroll(),
              c, 
              cd = ce.dom;
          if(cd == document.body){
              c = { x: s.left, y: s.top, width: Ext.lib.Dom.getViewWidth(), height: Ext.lib.Dom.getViewHeight()};
          }else{
              var xy = ce.getXY();
              c = {x : xy[0], y: xy[1], width: cd.clientWidth, height: cd.clientHeight};
          }
  
  
          var topSpace = b.y - c.y,
              leftSpace = b.x - c.x;
  
          this.resetConstraints();
          this.setXConstraint(leftSpace - (pad.left||0), // left
                  c.width - leftSpace - b.width - (pad.right||0), //right
  				this.xTickSize
          );
          this.setYConstraint(topSpace - (pad.top||0), //top
                  c.height - topSpace - b.height - (pad.bottom||0), //bottom
  				this.yTickSize
          );
      },
  
      /**
       * Returns a reference to the linked element
       * @method getEl
       * @return {HTMLElement} the html element
       */
      getEl: function() {
          if (!this._domRef) {
              this._domRef = Ext.getDom(this.id);
          }
  
          return this._domRef;
      },
  
      /**
       * Returns a reference to the actual element to drag.  By default this is
       * the same as the html element, but it can be assigned to another
       * element. An example of this can be found in Ext.dd.DDProxy
       * @method getDragEl
       * @return {HTMLElement} the html element
       */
      getDragEl: function() {
          return Ext.getDom(this.dragElId);
      },
  
      /**
       * Sets up the DragDrop object.  Must be called in the constructor of any
       * Ext.dd.DragDrop subclass
       * @method init
       * @param id the id of the linked element
       * @param {String} sGroup the group of related items
       * @param {object} config configuration attributes
       */
      init: function(id, sGroup, config) {
          this.initTarget(id, sGroup, config);
          Event.on(this.id, "mousedown", this.handleMouseDown, this);
          // Event.on(this.id, "selectstart", Event.preventDefault);
      },
  
      /**
       * Initializes Targeting functionality only... the object does not
       * get a mousedown handler.
       * @method initTarget
       * @param id the id of the linked element
       * @param {String} sGroup the group of related items
       * @param {object} config configuration attributes
       */
      initTarget: function(id, sGroup, config) {
  
          // configuration attributes
          this.config = config || {};
  
          // create a local reference to the drag and drop manager
          this.DDM = Ext.dd.DDM;
          // initialize the groups array
          this.groups = {};
  
          // assume that we have an element reference instead of an id if the
          // parameter is not a string
          if (typeof id !== "string") {
              id = Ext.id(id);
          }
  
          // set the id
          this.id = id;
  
          // add to an interaction group
          this.addToGroup((sGroup) ? sGroup : "default");
  
          // We don't want to register this as the handle with the manager
          // so we just set the id rather than calling the setter.
          this.handleElId = id;
  
          // the linked element is the element that gets dragged by default
          this.setDragElId(id);
  
          // by default, clicked anchors will not start drag operations.
          this.invalidHandleTypes = { A: "A" };
          this.invalidHandleIds = {};
          this.invalidHandleClasses = [];
  
          this.applyConfig();
  
          this.handleOnAvailable();
      },
  
      /**
       * Applies the configuration parameters that were passed into the constructor.
       * This is supposed to happen at each level through the inheritance chain.  So
       * a DDProxy implentation will execute apply config on DDProxy, DD, and
       * DragDrop in order to get all of the parameters that are available in
       * each object.
       * @method applyConfig
       */
      applyConfig: function() {
  
          // configurable properties:
          //    padding, isTarget, maintainOffset, primaryButtonOnly
          this.padding           = this.config.padding || [0, 0, 0, 0];
          this.isTarget          = (this.config.isTarget !== false);
          this.maintainOffset    = (this.config.maintainOffset);
          this.primaryButtonOnly = (this.config.primaryButtonOnly !== false);
  
      },
  
      /**
       * Executed when the linked element is available
       * @method handleOnAvailable
       * @private
       */
      handleOnAvailable: function() {
          this.available = true;
          this.resetConstraints();
          this.onAvailable();
      },
  
       /**
       * Configures the padding for the target zone in px.  Effectively expands
       * (or reduces) the virtual object size for targeting calculations.
       * Supports css-style shorthand; if only one parameter is passed, all sides
       * will have that padding, and if only two are passed, the top and bottom
       * will have the first param, the left and right the second.
       * @method setPadding
       * @param {int} iTop    Top pad
       * @param {int} iRight  Right pad
       * @param {int} iBot    Bot pad
       * @param {int} iLeft   Left pad
       */
      setPadding: function(iTop, iRight, iBot, iLeft) {
          // this.padding = [iLeft, iRight, iTop, iBot];
          if (!iRight && 0 !== iRight) {
              this.padding = [iTop, iTop, iTop, iTop];
          } else if (!iBot && 0 !== iBot) {
              this.padding = [iTop, iRight, iTop, iRight];
          } else {
              this.padding = [iTop, iRight, iBot, iLeft];
          }
      },
  
      /**
       * Stores the initial placement of the linked element.
       * @method setInitPosition
       * @param {int} diffX   the X offset, default 0
       * @param {int} diffY   the Y offset, default 0
       */
      setInitPosition: function(diffX, diffY) {
          var el = this.getEl();
  
          if (!this.DDM.verifyEl(el)) {
              return;
          }
  
          var dx = diffX || 0;
          var dy = diffY || 0;
  
          var p = Dom.getXY( el );
  
          this.initPageX = p[0] - dx;
          this.initPageY = p[1] - dy;
  
          this.lastPageX = p[0];
          this.lastPageY = p[1];
  
  
          this.setStartPosition(p);
      },
  
      /**
       * Sets the start position of the element.  This is set when the obj
       * is initialized, the reset when a drag is started.
       * @method setStartPosition
       * @param pos current position (from previous lookup)
       * @private
       */
      setStartPosition: function(pos) {
          var p = pos || Dom.getXY( this.getEl() );
          this.deltaSetXY = null;
  
          this.startPageX = p[0];
          this.startPageY = p[1];
      },
  
      /**
       * Add this instance to a group of related drag/drop objects.  All
       * instances belong to at least one group, and can belong to as many
       * groups as needed.
       * @method addToGroup
       * @param sGroup {string} the name of the group
       */
      addToGroup: function(sGroup) {
          this.groups[sGroup] = true;
          this.DDM.regDragDrop(this, sGroup);
      },
  
      /**
       * Remove's this instance from the supplied interaction group
       * @method removeFromGroup
       * @param {string}  sGroup  The group to drop
       */
      removeFromGroup: function(sGroup) {
          if (this.groups[sGroup]) {
              delete this.groups[sGroup];
          }
  
          this.DDM.removeDDFromGroup(this, sGroup);
      },
  
      /**
       * Allows you to specify that an element other than the linked element
       * will be moved with the cursor during a drag
       * @method setDragElId
       * @param id {string} the id of the element that will be used to initiate the drag
       */
      setDragElId: function(id) {
          this.dragElId = id;
      },
  
      /**
       * Allows you to specify a child of the linked element that should be
       * used to initiate the drag operation.  An example of this would be if
       * you have a content div with text and links.  Clicking anywhere in the
       * content area would normally start the drag operation.  Use this method
       * to specify that an element inside of the content div is the element
       * that starts the drag operation.
       * @method setHandleElId
       * @param id {string} the id of the element that will be used to
       * initiate the drag.
       */
      setHandleElId: function(id) {
          if (typeof id !== "string") {
              id = Ext.id(id);
          }
          this.handleElId = id;
          this.DDM.regHandle(this.id, id);
      },
  
      /**
       * Allows you to set an element outside of the linked element as a drag
       * handle
       * @method setOuterHandleElId
       * @param id the id of the element that will be used to initiate the drag
       */
      setOuterHandleElId: function(id) {
          if (typeof id !== "string") {
              id = Ext.id(id);
          }
          Event.on(id, "mousedown",
                  this.handleMouseDown, this);
          this.setHandleElId(id);
  
          this.hasOuterHandles = true;
      },
  
      /**
       * Remove all drag and drop hooks for this element
       * @method unreg
       */
      unreg: function() {
          Event.un(this.id, "mousedown",
                  this.handleMouseDown);
          this._domRef = null;
          this.DDM._remove(this);
      },
  
      destroy : function(){
          this.unreg();
      },
  
      /**
       * Returns true if this instance is locked, or the drag drop mgr is locked
       * (meaning that all drag/drop is disabled on the page.)
       * @method isLocked
       * @return {boolean} true if this obj or all drag/drop is locked, else
       * false
       */
      isLocked: function() {
          return (this.DDM.isLocked() || this.locked);
      },
  
      /**
       * Fired when this object is clicked
       * @method handleMouseDown
       * @param {Event} e
       * @param {Ext.dd.DragDrop} oDD the clicked dd object (this dd obj)
       * @private
       */
      handleMouseDown: function(e, oDD){
          if (this.primaryButtonOnly && e.button != 0) {
              return;
          }
  
          if (this.isLocked()) {
              return;
          }
  
          this.DDM.refreshCache(this.groups);
  
          var pt = new Ext.lib.Point(Ext.lib.Event.getPageX(e), Ext.lib.Event.getPageY(e));
          if (!this.hasOuterHandles && !this.DDM.isOverTarget(pt, this) )  {
          } else {
              if (this.clickValidator(e)) {
  
                  // set the initial element position
                  this.setStartPosition();
  
  
                  this.b4MouseDown(e);
                  this.onMouseDown(e);
  
                  this.DDM.handleMouseDown(e, this);
  
                  this.DDM.stopEvent(e);
              } else {
  
  
              }
          }
      },
  
      clickValidator: function(e) {
          var target = e.getTarget();
          return ( this.isValidHandleChild(target) &&
                      (this.id == this.handleElId ||
                          this.DDM.handleWasClicked(target, this.id)) );
      },
  
      /**
       * Allows you to specify a tag name that should not start a drag operation
       * when clicked.  This is designed to facilitate embedding links within a
       * drag handle that do something other than start the drag.
       * @method addInvalidHandleType
       * @param {string} tagName the type of element to exclude
       */
      addInvalidHandleType: function(tagName) {
          var type = tagName.toUpperCase();
          this.invalidHandleTypes[type] = type;
      },
  
      /**
       * Lets you to specify an element id for a child of a drag handle
       * that should not initiate a drag
       * @method addInvalidHandleId
       * @param {string} id the element id of the element you wish to ignore
       */
      addInvalidHandleId: function(id) {
          if (typeof id !== "string") {
              id = Ext.id(id);
          }
          this.invalidHandleIds[id] = id;
      },
  
      /**
       * Lets you specify a css class of elements that will not initiate a drag
       * @method addInvalidHandleClass
       * @param {string} cssClass the class of the elements you wish to ignore
       */
      addInvalidHandleClass: function(cssClass) {
          this.invalidHandleClasses.push(cssClass);
      },
  
      /**
       * Unsets an excluded tag name set by addInvalidHandleType
       * @method removeInvalidHandleType
       * @param {string} tagName the type of element to unexclude
       */
      removeInvalidHandleType: function(tagName) {
          var type = tagName.toUpperCase();
          // this.invalidHandleTypes[type] = null;
          delete this.invalidHandleTypes[type];
      },
  
      /**
       * Unsets an invalid handle id
       * @method removeInvalidHandleId
       * @param {string} id the id of the element to re-enable
       */
      removeInvalidHandleId: function(id) {
          if (typeof id !== "string") {
              id = Ext.id(id);
          }
          delete this.invalidHandleIds[id];
      },
  
      /**
       * Unsets an invalid css class
       * @method removeInvalidHandleClass
       * @param {string} cssClass the class of the element(s) you wish to
       * re-enable
       */
      removeInvalidHandleClass: function(cssClass) {
          for (var i=0, len=this.invalidHandleClasses.length; i<len; ++i) {
              if (this.invalidHandleClasses[i] == cssClass) {
                  delete this.invalidHandleClasses[i];
              }
          }
      },
  
      /**
       * Checks the tag exclusion list to see if this click should be ignored
       * @method isValidHandleChild
       * @param {HTMLElement} node the HTMLElement to evaluate
       * @return {boolean} true if this is a valid tag type, false if not
       */
      isValidHandleChild: function(node) {
  
          var valid = true;
          // var n = (node.nodeName == "#text") ? node.parentNode : node;
          var nodeName;
          try {
              nodeName = node.nodeName.toUpperCase();
          } catch(e) {
              nodeName = node.nodeName;
          }
          valid = valid && !this.invalidHandleTypes[nodeName];
          valid = valid && !this.invalidHandleIds[node.id];
  
          for (var i=0, len=this.invalidHandleClasses.length; valid && i<len; ++i) {
              valid = !Ext.fly(node).hasClass(this.invalidHandleClasses[i]);
          }
  
  
          return valid;
  
      },
  
      /**
       * Create the array of horizontal tick marks if an interval was specified
       * in setXConstraint().
       * @method setXTicks
       * @private
       */
      setXTicks: function(iStartX, iTickSize) {
          this.xTicks = [];
          this.xTickSize = iTickSize;
  
          var tickMap = {};
  
          for (var i = this.initPageX; i >= this.minX; i = i - iTickSize) {
              if (!tickMap[i]) {
                  this.xTicks[this.xTicks.length] = i;
                  tickMap[i] = true;
              }
          }
  
          for (i = this.initPageX; i <= this.maxX; i = i + iTickSize) {
              if (!tickMap[i]) {
                  this.xTicks[this.xTicks.length] = i;
                  tickMap[i] = true;
              }
          }
  
          this.xTicks.sort(this.DDM.numericSort) ;
      },
  
      /**
       * Create the array of vertical tick marks if an interval was specified in
       * setYConstraint().
       * @method setYTicks
       * @private
       */
      setYTicks: function(iStartY, iTickSize) {
          this.yTicks = [];
          this.yTickSize = iTickSize;
  
          var tickMap = {};
  
          for (var i = this.initPageY; i >= this.minY; i = i - iTickSize) {
              if (!tickMap[i]) {
                  this.yTicks[this.yTicks.length] = i;
                  tickMap[i] = true;
              }
          }
  
          for (i = this.initPageY; i <= this.maxY; i = i + iTickSize) {
              if (!tickMap[i]) {
                  this.yTicks[this.yTicks.length] = i;
                  tickMap[i] = true;
              }
          }
  
          this.yTicks.sort(this.DDM.numericSort) ;
      },
  
      /**
       * By default, the element can be dragged any place on the screen.  Use
       * this method to limit the horizontal travel of the element.  Pass in
       * 0,0 for the parameters if you want to lock the drag to the y axis.
       * @method setXConstraint
       * @param {int} iLeft the number of pixels the element can move to the left
       * @param {int} iRight the number of pixels the element can move to the
       * right
       * @param {int} iTickSize optional parameter for specifying that the
       * element
       * should move iTickSize pixels at a time.
       */
      setXConstraint: function(iLeft, iRight, iTickSize) {
          this.leftConstraint = iLeft;
          this.rightConstraint = iRight;
  
          this.minX = this.initPageX - iLeft;
          this.maxX = this.initPageX + iRight;
          if (iTickSize) { this.setXTicks(this.initPageX, iTickSize); }
  
          this.constrainX = true;
      },
  
      /**
       * Clears any constraints applied to this instance.  Also clears ticks
       * since they can't exist independent of a constraint at this time.
       * @method clearConstraints
       */
      clearConstraints: function() {
          this.constrainX = false;
          this.constrainY = false;
          this.clearTicks();
      },
  
      /**
       * Clears any tick interval defined for this instance
       * @method clearTicks
       */
      clearTicks: function() {
          this.xTicks = null;
          this.yTicks = null;
          this.xTickSize = 0;
          this.yTickSize = 0;
      },
  
      /**
       * By default, the element can be dragged any place on the screen.  Set
       * this to limit the vertical travel of the element.  Pass in 0,0 for the
       * parameters if you want to lock the drag to the x axis.
       * @method setYConstraint
       * @param {int} iUp the number of pixels the element can move up
       * @param {int} iDown the number of pixels the element can move down
       * @param {int} iTickSize optional parameter for specifying that the
       * element should move iTickSize pixels at a time.
       */
      setYConstraint: function(iUp, iDown, iTickSize) {
          this.topConstraint = iUp;
          this.bottomConstraint = iDown;
  
          this.minY = this.initPageY - iUp;
          this.maxY = this.initPageY + iDown;
          if (iTickSize) { this.setYTicks(this.initPageY, iTickSize); }
  
          this.constrainY = true;
  
      },
  
      /**
       * resetConstraints must be called if you manually reposition a dd element.
       * @method resetConstraints
       * @param {boolean} maintainOffset
       */
      resetConstraints: function() {
  
  
          // Maintain offsets if necessary
          if (this.initPageX || this.initPageX === 0) {
              // figure out how much this thing has moved
              var dx = (this.maintainOffset) ? this.lastPageX - this.initPageX : 0;
              var dy = (this.maintainOffset) ? this.lastPageY - this.initPageY : 0;
  
              this.setInitPosition(dx, dy);
  
          // This is the first time we have detected the element's position
          } else {
              this.setInitPosition();
          }
  
          if (this.constrainX) {
              this.setXConstraint( this.leftConstraint,
                                   this.rightConstraint,
                                   this.xTickSize        );
          }
  
          if (this.constrainY) {
              this.setYConstraint( this.topConstraint,
                                   this.bottomConstraint,
                                   this.yTickSize         );
          }
      },
  
      /**
       * Normally the drag element is moved pixel by pixel, but we can specify
       * that it move a number of pixels at a time.  This method resolves the
       * location when we have it set up like this.
       * @method getTick
       * @param {int} val where we want to place the object
       * @param {int[]} tickArray sorted array of valid points
       * @return {int} the closest tick
       * @private
       */
      getTick: function(val, tickArray) {
  
          if (!tickArray) {
              // If tick interval is not defined, it is effectively 1 pixel,
              // so we return the value passed to us.
              return val;
          } else if (tickArray[0] >= val) {
              // The value is lower than the first tick, so we return the first
              // tick.
              return tickArray[0];
          } else {
              for (var i=0, len=tickArray.length; i<len; ++i) {
                  var next = i + 1;
                  if (tickArray[next] && tickArray[next] >= val) {
                      var diff1 = val - tickArray[i];
                      var diff2 = tickArray[next] - val;
                      return (diff2 > diff1) ? tickArray[i] : tickArray[next];
                  }
              }
  
              // The value is larger than the last tick, so we return the last
              // tick.
              return tickArray[tickArray.length - 1];
          }
      },
  
      /**
       * toString method
       * @method toString
       * @return {string} string representation of the dd obj
       */
      toString: function() {
          return ("DragDrop " + this.id);
      }
  
  };
  
  })();
  /**
   * The drag and drop utility provides a framework for building drag and drop
   * applications.  In addition to enabling drag and drop for specific elements,
   * the drag and drop elements are tracked by the manager class, and the
   * interactions between the various elements are tracked during the drag and
   * the implementing code is notified about these important moments.
   */
  
  // Only load the library once.  Rewriting the manager class would orphan
  // existing drag and drop instances.
  if (!Ext.dd.DragDropMgr) {
  
  /**
   * @class Ext.dd.DragDropMgr
   * DragDropMgr is a singleton that tracks the element interaction for
   * all DragDrop items in the window.  Generally, you will not call
   * this class directly, but it does have helper methods that could
   * be useful in your DragDrop implementations.
   * @singleton
   */
  Ext.dd.DragDropMgr = function() {
  
      var Event = Ext.EventManager;
  
      return {
  
          /**
           * Two dimensional Array of registered DragDrop objects.  The first
           * dimension is the DragDrop item group, the second the DragDrop
           * object.
           * @property ids
           * @type {string: string}
           * @private
           * @static
           */
          ids: {},
  
          /**
           * Array of element ids defined as drag handles.  Used to determine
           * if the element that generated the mousedown event is actually the
           * handle and not the html element itself.
           * @property handleIds
           * @type {string: string}
           * @private
           * @static
           */
          handleIds: {},
  
          /**
           * the DragDrop object that is currently being dragged
           * @property dragCurrent
           * @type DragDrop
           * @private
           * @static
           **/
          dragCurrent: null,
  
          /**
           * the DragDrop object(s) that are being hovered over
           * @property dragOvers
           * @type Array
           * @private
           * @static
           */
          dragOvers: {},
  
          /**
           * the X distance between the cursor and the object being dragged
           * @property deltaX
           * @type int
           * @private
           * @static
           */
          deltaX: 0,
  
          /**
           * the Y distance between the cursor and the object being dragged
           * @property deltaY
           * @type int
           * @private
           * @static
           */
          deltaY: 0,
  
          /**
           * Flag to determine if we should prevent the default behavior of the
           * events we define. By default this is true, but this can be set to
           * false if you need the default behavior (not recommended)
           * @property preventDefault
           * @type boolean
           * @static
           */
          preventDefault: true,
  
          /**
           * Flag to determine if we should stop the propagation of the events
           * we generate. This is true by default but you may want to set it to
           * false if the html element contains other features that require the
           * mouse click.
           * @property stopPropagation
           * @type boolean
           * @static
           */
          stopPropagation: true,
  
          /**
           * Internal flag that is set to true when drag and drop has been
           * intialized
           * @property initialized
           * @private
           * @static
           */
          initialized: false,
  
          /**
           * All drag and drop can be disabled.
           * @property locked
           * @private
           * @static
           */
          locked: false,
  
          /**
           * Called the first time an element is registered.
           * @method init
           * @private
           * @static
           */
          init: function() {
              this.initialized = true;
          },
  
          /**
           * In point mode, drag and drop interaction is defined by the
           * location of the cursor during the drag/drop
           * @property POINT
           * @type int
           * @static
           */
          POINT: 0,
  
          /**
           * In intersect mode, drag and drop interaction is defined by the
           * overlap of two or more drag and drop objects.
           * @property INTERSECT
           * @type int
           * @static
           */
          INTERSECT: 1,
  
          /**
           * The current drag and drop mode.  Default: POINT
           * @property mode
           * @type int
           * @static
           */
          mode: 0,
  
          /**
           * Runs method on all drag and drop objects
           * @method _execOnAll
           * @private
           * @static
           */
          _execOnAll: function(sMethod, args) {
              for (var i in this.ids) {
                  for (var j in this.ids[i]) {
                      var oDD = this.ids[i][j];
                      if (! this.isTypeOfDD(oDD)) {
                          continue;
                      }
                      oDD[sMethod].apply(oDD, args);
                  }
              }
          },
  
          /**
           * Drag and drop initialization.  Sets up the global event handlers
           * @method _onLoad
           * @private
           * @static
           */
          _onLoad: function() {
  
              this.init();
  
  
              Event.on(document, "mouseup",   this.handleMouseUp, this, true);
              Event.on(document, "mousemove", this.handleMouseMove, this, true);
              Event.on(window,   "unload",    this._onUnload, this, true);
              Event.on(window,   "resize",    this._onResize, this, true);
              // Event.on(window,   "mouseout",    this._test);
  
          },
  
          /**
           * Reset constraints on all drag and drop objs
           * @method _onResize
           * @private
           * @static
           */
          _onResize: function(e) {
              this._execOnAll("resetConstraints", []);
          },
  
          /**
           * Lock all drag and drop functionality
           * @method lock
           * @static
           */
          lock: function() { this.locked = true; },
  
          /**
           * Unlock all drag and drop functionality
           * @method unlock
           * @static
           */
          unlock: function() { this.locked = false; },
  
          /**
           * Is drag and drop locked?
           * @method isLocked
           * @return {boolean} True if drag and drop is locked, false otherwise.
           * @static
           */
          isLocked: function() { return this.locked; },
  
          /**
           * Location cache that is set for all drag drop objects when a drag is
           * initiated, cleared when the drag is finished.
           * @property locationCache
           * @private
           * @static
           */
          locationCache: {},
  
          /**
           * Set useCache to false if you want to force object the lookup of each
           * drag and drop linked element constantly during a drag.
           * @property useCache
           * @type boolean
           * @static
           */
          useCache: true,
  
          /**
           * The number of pixels that the mouse needs to move after the
           * mousedown before the drag is initiated.  Default=3;
           * @property clickPixelThresh
           * @type int
           * @static
           */
          clickPixelThresh: 3,
  
          /**
           * The number of milliseconds after the mousedown event to initiate the
           * drag if we don't get a mouseup event. Default=350
           * @property clickTimeThresh
           * @type int
           * @static
           */
          clickTimeThresh: 350,
  
          /**
           * Flag that indicates that either the drag pixel threshold or the
           * mousdown time threshold has been met
           * @property dragThreshMet
           * @type boolean
           * @private
           * @static
           */
          dragThreshMet: false,
  
          /**
           * Timeout used for the click time threshold
           * @property clickTimeout
           * @type Object
           * @private
           * @static
           */
          clickTimeout: null,
  
          /**
           * The X position of the mousedown event stored for later use when a
           * drag threshold is met.
           * @property startX
           * @type int
           * @private
           * @static
           */
          startX: 0,
  
          /**
           * The Y position of the mousedown event stored for later use when a
           * drag threshold is met.
           * @property startY
           * @type int
           * @private
           * @static
           */
          startY: 0,
  
          /**
           * Each DragDrop instance must be registered with the DragDropMgr.
           * This is executed in DragDrop.init()
           * @method regDragDrop
           * @param {DragDrop} oDD the DragDrop object to register
           * @param {String} sGroup the name of the group this element belongs to
           * @static
           */
          regDragDrop: function(oDD, sGroup) {
              if (!this.initialized) { this.init(); }
  
              if (!this.ids[sGroup]) {
                  this.ids[sGroup] = {};
              }
              this.ids[sGroup][oDD.id] = oDD;
          },
  
          /**
           * Removes the supplied dd instance from the supplied group. Executed
           * by DragDrop.removeFromGroup, so don't call this function directly.
           * @method removeDDFromGroup
           * @private
           * @static
           */
          removeDDFromGroup: function(oDD, sGroup) {
              if (!this.ids[sGroup]) {
                  this.ids[sGroup] = {};
              }
  
              var obj = this.ids[sGroup];
              if (obj && obj[oDD.id]) {
                  delete obj[oDD.id];
              }
          },
  
          /**
           * Unregisters a drag and drop item.  This is executed in
           * DragDrop.unreg, use that method instead of calling this directly.
           * @method _remove
           * @private
           * @static
           */
          _remove: function(oDD) {
              for (var g in oDD.groups) {
                  if (g && this.ids[g] && this.ids[g][oDD.id]) {
                      delete this.ids[g][oDD.id];
                  }
              }
              delete this.handleIds[oDD.id];
          },
  
          /**
           * Each DragDrop handle element must be registered.  This is done
           * automatically when executing DragDrop.setHandleElId()
           * @method regHandle
           * @param {String} sDDId the DragDrop id this element is a handle for
           * @param {String} sHandleId the id of the element that is the drag
           * handle
           * @static
           */
          regHandle: function(sDDId, sHandleId) {
              if (!this.handleIds[sDDId]) {
                  this.handleIds[sDDId] = {};
              }
              this.handleIds[sDDId][sHandleId] = sHandleId;
          },
  
          /**
           * Utility function to determine if a given element has been
           * registered as a drag drop item.
           * @method isDragDrop
           * @param {String} id the element id to check
           * @return {boolean} true if this element is a DragDrop item,
           * false otherwise
           * @static
           */
          isDragDrop: function(id) {
              return ( this.getDDById(id) ) ? true : false;
          },
  
          /**
           * Returns the drag and drop instances that are in all groups the
           * passed in instance belongs to.
           * @method getRelated
           * @param {DragDrop} p_oDD the obj to get related data for
           * @param {boolean} bTargetsOnly if true, only return targetable objs
           * @return {DragDrop[]} the related instances
           * @static
           */
          getRelated: function(p_oDD, bTargetsOnly) {
              var oDDs = [];
              for (var i in p_oDD.groups) {
                  for (var j in this.ids[i]) {
                      var dd = this.ids[i][j];
                      if (! this.isTypeOfDD(dd)) {
                          continue;
                      }
                      if (!bTargetsOnly || dd.isTarget) {
                          oDDs[oDDs.length] = dd;
                      }
                  }
              }
  
              return oDDs;
          },
  
          /**
           * Returns true if the specified dd target is a legal target for
           * the specifice drag obj
           * @method isLegalTarget
           * @param {DragDrop} the drag obj
           * @param {DragDrop} the target
           * @return {boolean} true if the target is a legal target for the
           * dd obj
           * @static
           */
          isLegalTarget: function (oDD, oTargetDD) {
              var targets = this.getRelated(oDD, true);
              for (var i=0, len=targets.length;i<len;++i) {
                  if (targets[i].id == oTargetDD.id) {
                      return true;
                  }
              }
  
              return false;
          },
  
          /**
           * My goal is to be able to transparently determine if an object is
           * typeof DragDrop, and the exact subclass of DragDrop.  typeof
           * returns "object", oDD.constructor.toString() always returns
           * "DragDrop" and not the name of the subclass.  So for now it just
           * evaluates a well-known variable in DragDrop.
           * @method isTypeOfDD
           * @param {Object} the object to evaluate
           * @return {boolean} true if typeof oDD = DragDrop
           * @static
           */
          isTypeOfDD: function (oDD) {
              return (oDD && oDD.__ygDragDrop);
          },
  
          /**
           * Utility function to determine if a given element has been
           * registered as a drag drop handle for the given Drag Drop object.
           * @method isHandle
           * @param {String} id the element id to check
           * @return {boolean} true if this element is a DragDrop handle, false
           * otherwise
           * @static
           */
          isHandle: function(sDDId, sHandleId) {
              return ( this.handleIds[sDDId] &&
                              this.handleIds[sDDId][sHandleId] );
          },
  
          /**
           * Returns the DragDrop instance for a given id
           * @method getDDById
           * @param {String} id the id of the DragDrop object
           * @return {DragDrop} the drag drop object, null if it is not found
           * @static
           */
          getDDById: function(id) {
              for (var i in this.ids) {
                  if (this.ids[i][id]) {
                      return this.ids[i][id];
                  }
              }
              return null;
          },
  
          /**
           * Fired after a registered DragDrop object gets the mousedown event.
           * Sets up the events required to track the object being dragged
           * @method handleMouseDown
           * @param {Event} e the event
           * @param oDD the DragDrop object being dragged
           * @private
           * @static
           */
          handleMouseDown: function(e, oDD) {
              if(Ext.QuickTips){
                  Ext.QuickTips.disable();
              }
              if(this.dragCurrent){
                  // the original browser mouseup wasn't handled (e.g. outside FF browser window)
                  // so clean up first to avoid breaking the next drag
                  this.handleMouseUp(e);
              }
              
              this.currentTarget = e.getTarget();
              this.dragCurrent = oDD;
  
              var el = oDD.getEl();
  
              // track start position
              this.startX = e.getPageX();
              this.startY = e.getPageY();
  
              this.deltaX = this.startX - el.offsetLeft;
              this.deltaY = this.startY - el.offsetTop;
  
              this.dragThreshMet = false;
  
              this.clickTimeout = setTimeout(
                      function() {
                          var DDM = Ext.dd.DDM;
                          DDM.startDrag(DDM.startX, DDM.startY);
                      },
                      this.clickTimeThresh );
          },
  
          /**
           * Fired when either the drag pixel threshol or the mousedown hold
           * time threshold has been met.
           * @method startDrag
           * @param x {int} the X position of the original mousedown
           * @param y {int} the Y position of the original mousedown
           * @static
           */
          startDrag: function(x, y) {
              clearTimeout(this.clickTimeout);
              if (this.dragCurrent) {
                  this.dragCurrent.b4StartDrag(x, y);
                  this.dragCurrent.startDrag(x, y);
              }
              this.dragThreshMet = true;
          },
  
          /**
           * Internal function to handle the mouseup event.  Will be invoked
           * from the context of the document.
           * @method handleMouseUp
           * @param {Event} e the event
           * @private
           * @static
           */
          handleMouseUp: function(e) {
  
              if(Ext.QuickTips){
                  Ext.QuickTips.enable();
              }
              if (! this.dragCurrent) {
                  return;
              }
  
              clearTimeout(this.clickTimeout);
  
              if (this.dragThreshMet) {
                  this.fireEvents(e, true);
              } else {
              }
  
              this.stopDrag(e);
  
              this.stopEvent(e);
          },
  
          /**
           * Utility to stop event propagation and event default, if these
           * features are turned on.
           * @method stopEvent
           * @param {Event} e the event as returned by this.getEvent()
           * @static
           */
          stopEvent: function(e){
              if(this.stopPropagation) {
                  e.stopPropagation();
              }
  
              if (this.preventDefault) {
                  e.preventDefault();
              }
          },
  
          /**
           * Internal function to clean up event handlers after the drag
           * operation is complete
           * @method stopDrag
           * @param {Event} e the event
           * @private
           * @static
           */
          stopDrag: function(e) {
              // Fire the drag end event for the item that was dragged
              if (this.dragCurrent) {
                  if (this.dragThreshMet) {
                      this.dragCurrent.b4EndDrag(e);
                      this.dragCurrent.endDrag(e);
                  }
  
                  this.dragCurrent.onMouseUp(e);
              }
  
              this.dragCurrent = null;
              this.dragOvers = {};
          },
  
          /**
           * Internal function to handle the mousemove event.  Will be invoked
           * from the context of the html element.
           *
           * @TODO figure out what we can do about mouse events lost when the
           * user drags objects beyond the window boundary.  Currently we can
           * detect this in internet explorer by verifying that the mouse is
           * down during the mousemove event.  Firefox doesn't give us the
           * button state on the mousemove event.
           * @method handleMouseMove
           * @param {Event} e the event
           * @private
           * @static
           */
          handleMouseMove: function(e) {
              if (! this.dragCurrent) {
                  return true;
              }
              // var button = e.which || e.button;
  
              // check for IE mouseup outside of page boundary
              if (Ext.isIE && (e.button !== 0 && e.button !== 1 && e.button !== 2)) {
                  this.stopEvent(e);
                  return this.handleMouseUp(e);
              }
  
              if (!this.dragThreshMet) {
                  var diffX = Math.abs(this.startX - e.getPageX());
                  var diffY = Math.abs(this.startY - e.getPageY());
                  if (diffX > this.clickPixelThresh ||
                              diffY > this.clickPixelThresh) {
                      this.startDrag(this.startX, this.startY);
                  }
              }
  
              if (this.dragThreshMet) {
                  this.dragCurrent.b4Drag(e);
                  this.dragCurrent.onDrag(e);
                  if(!this.dragCurrent.moveOnly){
                      this.fireEvents(e, false);
                  }
              }
  
              this.stopEvent(e);
  
              return true;
          },
  
          /**
           * Iterates over all of the DragDrop elements to find ones we are
           * hovering over or dropping on
           * @method fireEvents
           * @param {Event} e the event
           * @param {boolean} isDrop is this a drop op or a mouseover op?
           * @private
           * @static
           */
          fireEvents: function(e, isDrop) {
              var dc = this.dragCurrent;
  
              // If the user did the mouse up outside of the window, we could
              // get here even though we have ended the drag.
              if (!dc || dc.isLocked()) {
                  return;
              }
  
              var pt = e.getPoint();
  
              // cache the previous dragOver array
              var oldOvers = [];
  
              var outEvts   = [];
              var overEvts  = [];
              var dropEvts  = [];
              var enterEvts = [];
  
              // Check to see if the object(s) we were hovering over is no longer
              // being hovered over so we can fire the onDragOut event
              for (var i in this.dragOvers) {
  
                  var ddo = this.dragOvers[i];
  
                  if (! this.isTypeOfDD(ddo)) {
                      continue;
                  }
  
                  if (! this.isOverTarget(pt, ddo, this.mode)) {
                      outEvts.push( ddo );
                  }
  
                  oldOvers[i] = true;
                  delete this.dragOvers[i];
              }
  
              for (var sGroup in dc.groups) {
  
                  if ("string" != typeof sGroup) {
                      continue;
                  }
  
                  for (i in this.ids[sGroup]) {
                      var oDD = this.ids[sGroup][i];
                      if (! this.isTypeOfDD(oDD)) {
                          continue;
                      }
  
                      if (oDD.isTarget && !oDD.isLocked() && ((oDD != dc) || (dc.ignoreSelf === false))) {
                          if (this.isOverTarget(pt, oDD, this.mode)) {
                              // look for drop interactions
                              if (isDrop) {
                                  dropEvts.push( oDD );
                              // look for drag enter and drag over interactions
                              } else {
  
                                  // initial drag over: dragEnter fires
                                  if (!oldOvers[oDD.id]) {
                                      enterEvts.push( oDD );
                                  // subsequent drag overs: dragOver fires
                                  } else {
                                      overEvts.push( oDD );
                                  }
  
                                  this.dragOvers[oDD.id] = oDD;
                              }
                          }
                      }
                  }
              }
  
              if (this.mode) {
                  if (outEvts.length) {
                      dc.b4DragOut(e, outEvts);
                      dc.onDragOut(e, outEvts);
                  }
  
                  if (enterEvts.length) {
                      dc.onDragEnter(e, enterEvts);
                  }
  
                  if (overEvts.length) {
                      dc.b4DragOver(e, overEvts);
                      dc.onDragOver(e, overEvts);
                  }
  
                  if (dropEvts.length) {
                      dc.b4DragDrop(e, dropEvts);
                      dc.onDragDrop(e, dropEvts);
                  }
  
              } else {
                  // fire dragout events
                  var len = 0;
                  for (i=0, len=outEvts.length; i<len; ++i) {
                      dc.b4DragOut(e, outEvts[i].id);
                      dc.onDragOut(e, outEvts[i].id);
                  }
  
                  // fire enter events
                  for (i=0,len=enterEvts.length; i<len; ++i) {
                      // dc.b4DragEnter(e, oDD.id);
                      dc.onDragEnter(e, enterEvts[i].id);
                  }
  
                  // fire over events
                  for (i=0,len=overEvts.length; i<len; ++i) {
                      dc.b4DragOver(e, overEvts[i].id);
                      dc.onDragOver(e, overEvts[i].id);
                  }
  
                  // fire drop events
                  for (i=0, len=dropEvts.length; i<len; ++i) {
                      dc.b4DragDrop(e, dropEvts[i].id);
                      dc.onDragDrop(e, dropEvts[i].id);
                  }
  
              }
  
              // notify about a drop that did not find a target
              if (isDrop && !dropEvts.length) {
                  dc.onInvalidDrop(e);
              }
  
          },
  
          /**
           * Helper function for getting the best match from the list of drag
           * and drop objects returned by the drag and drop events when we are
           * in INTERSECT mode.  It returns either the first object that the
           * cursor is over, or the object that has the greatest overlap with
           * the dragged element.
           * @method getBestMatch
           * @param  {DragDrop[]} dds The array of drag and drop objects
           * targeted
           * @return {DragDrop}       The best single match
           * @static
           */
          getBestMatch: function(dds) {
              var winner = null;
              // Return null if the input is not what we expect
              //if (!dds || !dds.length || dds.length == 0) {
                 // winner = null;
              // If there is only one item, it wins
              //} else if (dds.length == 1) {
  
              var len = dds.length;
  
              if (len == 1) {
                  winner = dds[0];
              } else {
                  // Loop through the targeted items
                  for (var i=0; i<len; ++i) {
                      var dd = dds[i];
                      // If the cursor is over the object, it wins.  If the
                      // cursor is over multiple matches, the first one we come
                      // to wins.
                      if (dd.cursorIsOver) {
                          winner = dd;
                          break;
                      // Otherwise the object with the most overlap wins
                      } else {
                          if (!winner ||
                              winner.overlap.getArea() < dd.overlap.getArea()) {
                              winner = dd;
                          }
                      }
                  }
              }
  
              return winner;
          },
  
          /**
           * Refreshes the cache of the top-left and bottom-right points of the
           * drag and drop objects in the specified group(s).  This is in the
           * format that is stored in the drag and drop instance, so typical
           * usage is:
           * <code>
           * Ext.dd.DragDropMgr.refreshCache(ddinstance.groups);
           * </code>
           * Alternatively:
           * <code>
           * Ext.dd.DragDropMgr.refreshCache({group1:true, group2:true});
           * </code>
           * @TODO this really should be an indexed array.  Alternatively this
           * method could accept both.
           * @method refreshCache
           * @param {Object} groups an associative array of groups to refresh
           * @static
           */
          refreshCache: function(groups) {
              for (var sGroup in groups) {
                  if ("string" != typeof sGroup) {
                      continue;
                  }
                  for (var i in this.ids[sGroup]) {
                      var oDD = this.ids[sGroup][i];
  
                      if (this.isTypeOfDD(oDD)) {
                      // if (this.isTypeOfDD(oDD) && oDD.isTarget) {
                          var loc = this.getLocation(oDD);
                          if (loc) {
                              this.locationCache[oDD.id] = loc;
                          } else {
                              delete this.locationCache[oDD.id];
                              // this will unregister the drag and drop object if
                              // the element is not in a usable state
                              // oDD.unreg();
                          }
                      }
                  }
              }
          },
  
          /**
           * This checks to make sure an element exists and is in the DOM.  The
           * main purpose is to handle cases where innerHTML is used to remove
           * drag and drop objects from the DOM.  IE provides an 'unspecified
           * error' when trying to access the offsetParent of such an element
           * @method verifyEl
           * @param {HTMLElement} el the element to check
           * @return {boolean} true if the element looks usable
           * @static
           */
          verifyEl: function(el) {
              if (el) {
                  var parent;
                  if(Ext.isIE){
                      try{
                          parent = el.offsetParent;
                      }catch(e){}
                  }else{
                      parent = el.offsetParent;
                  }
                  if (parent) {
                      return true;
                  }
              }
  
              return false;
          },
  
          /**
           * Returns a Region object containing the drag and drop element's position
           * and size, including the padding configured for it
           * @method getLocation
           * @param {DragDrop} oDD the drag and drop object to get the
           *                       location for
           * @return {Ext.lib.Region} a Region object representing the total area
           *                             the element occupies, including any padding
           *                             the instance is configured for.
           * @static
           */
          getLocation: function(oDD) {
              if (! this.isTypeOfDD(oDD)) {
                  return null;
              }
  
              var el = oDD.getEl(), pos, x1, x2, y1, y2, t, r, b, l;
  
              try {
                  pos= Ext.lib.Dom.getXY(el);
              } catch (e) { }
  
              if (!pos) {
                  return null;
              }
  
              x1 = pos[0];
              x2 = x1 + el.offsetWidth;
              y1 = pos[1];
              y2 = y1 + el.offsetHeight;
  
              t = y1 - oDD.padding[0];
              r = x2 + oDD.padding[1];
              b = y2 + oDD.padding[2];
              l = x1 - oDD.padding[3];
  
              return new Ext.lib.Region( t, r, b, l );
          },
  
          /**
           * Checks the cursor location to see if it over the target
           * @method isOverTarget
           * @param {Ext.lib.Point} pt The point to evaluate
           * @param {DragDrop} oTarget the DragDrop object we are inspecting
           * @return {boolean} true if the mouse is over the target
           * @private
           * @static
           */
          isOverTarget: function(pt, oTarget, intersect) {
              // use cache if available
              var loc = this.locationCache[oTarget.id];
              if (!loc || !this.useCache) {
                  loc = this.getLocation(oTarget);
                  this.locationCache[oTarget.id] = loc;
  
              }
  
              if (!loc) {
                  return false;
              }
  
              oTarget.cursorIsOver = loc.contains( pt );
  
              // DragDrop is using this as a sanity check for the initial mousedown
              // in this case we are done.  In POINT mode, if the drag obj has no
              // contraints, we are also done. Otherwise we need to evaluate the
              // location of the target as related to the actual location of the
              // dragged element.
              var dc = this.dragCurrent;
              if (!dc || !dc.getTargetCoord ||
                      (!intersect && !dc.constrainX && !dc.constrainY)) {
                  return oTarget.cursorIsOver;
              }
  
              oTarget.overlap = null;
  
              // Get the current location of the drag element, this is the
              // location of the mouse event less the delta that represents
              // where the original mousedown happened on the element.  We
              // need to consider constraints and ticks as well.
              var pos = dc.getTargetCoord(pt.x, pt.y);
  
              var el = dc.getDragEl();
              var curRegion = new Ext.lib.Region( pos.y,
                                                     pos.x + el.offsetWidth,
                                                     pos.y + el.offsetHeight,
                                                     pos.x );
  
              var overlap = curRegion.intersect(loc);
  
              if (overlap) {
                  oTarget.overlap = overlap;
                  return (intersect) ? true : oTarget.cursorIsOver;
              } else {
                  return false;
              }
          },
  
          /**
           * unload event handler
           * @method _onUnload
           * @private
           * @static
           */
          _onUnload: function(e, me) {
              Ext.dd.DragDropMgr.unregAll();
          },
  
          /**
           * Cleans up the drag and drop events and objects.
           * @method unregAll
           * @private
           * @static
           */
          unregAll: function() {
  
              if (this.dragCurrent) {
                  this.stopDrag();
                  this.dragCurrent = null;
              }
  
              this._execOnAll("unreg", []);
  
              for (var i in this.elementCache) {
                  delete this.elementCache[i];
              }
  
              this.elementCache = {};
              this.ids = {};
          },
  
          /**
           * A cache of DOM elements
           * @property elementCache
           * @private
           * @static
           */
          elementCache: {},
  
          /**
           * Get the wrapper for the DOM element specified
           * @method getElWrapper
           * @param {String} id the id of the element to get
           * @return {Ext.dd.DDM.ElementWrapper} the wrapped element
           * @private
           * @deprecated This wrapper isn't that useful
           * @static
           */
          getElWrapper: function(id) {
              var oWrapper = this.elementCache[id];
              if (!oWrapper || !oWrapper.el) {
                  oWrapper = this.elementCache[id] =
                      new this.ElementWrapper(Ext.getDom(id));
              }
              return oWrapper;
          },
  
          /**
           * Returns the actual DOM element
           * @method getElement
           * @param {String} id the id of the elment to get
           * @return {Object} The element
           * @deprecated use Ext.lib.Ext.getDom instead
           * @static
           */
          getElement: function(id) {
              return Ext.getDom(id);
          },
  
          /**
           * Returns the style property for the DOM element (i.e.,
           * document.getElById(id).style)
           * @method getCss
           * @param {String} id the id of the elment to get
           * @return {Object} The style property of the element
           * @deprecated use Ext.lib.Dom instead
           * @static
           */
          getCss: function(id) {
              var el = Ext.getDom(id);
              return (el) ? el.style : null;
          },
  
          /**
           * Inner class for cached elements
           * @class DragDropMgr.ElementWrapper
           * @for DragDropMgr
           * @private
           * @deprecated
           */
          ElementWrapper: function(el) {
                  /**
                   * The element
                   * @property el
                   */
                  this.el = el || null;
                  /**
                   * The element id
                   * @property id
                   */
                  this.id = this.el && el.id;
                  /**
                   * A reference to the style property
                   * @property css
                   */
                  this.css = this.el && el.style;
              },
  
          /**
           * Returns the X position of an html element
           * @method getPosX
           * @param el the element for which to get the position
           * @return {int} the X coordinate
           * @for DragDropMgr
           * @deprecated use Ext.lib.Dom.getX instead
           * @static
           */
          getPosX: function(el) {
              return Ext.lib.Dom.getX(el);
          },
  
          /**
           * Returns the Y position of an html element
           * @method getPosY
           * @param el the element for which to get the position
           * @return {int} the Y coordinate
           * @deprecated use Ext.lib.Dom.getY instead
           * @static
           */
          getPosY: function(el) {
              return Ext.lib.Dom.getY(el);
          },
  
          /**
           * Swap two nodes.  In IE, we use the native method, for others we
           * emulate the IE behavior
           * @method swapNode
           * @param n1 the first node to swap
           * @param n2 the other node to swap
           * @static
           */
          swapNode: function(n1, n2) {
              if (n1.swapNode) {
                  n1.swapNode(n2);
              } else {
                  var p = n2.parentNode;
                  var s = n2.nextSibling;
  
                  if (s == n1) {
                      p.insertBefore(n1, n2);
                  } else if (n2 == n1.nextSibling) {
                      p.insertBefore(n2, n1);
                  } else {
                      n1.parentNode.replaceChild(n2, n1);
                      p.insertBefore(n1, s);
                  }
              }
          },
  
          /**
           * Returns the current scroll position
           * @method getScroll
           * @private
           * @static
           */
          getScroll: function () {
              var t, l, dde=document.documentElement, db=document.body;
              if (dde && (dde.scrollTop || dde.scrollLeft)) {
                  t = dde.scrollTop;
                  l = dde.scrollLeft;
              } else if (db) {
                  t = db.scrollTop;
                  l = db.scrollLeft;
              } else {
  
              }
              return { top: t, left: l };
          },
  
          /**
           * Returns the specified element style property
           * @method getStyle
           * @param {HTMLElement} el          the element
           * @param {string}      styleProp   the style property
           * @return {string} The value of the style property
           * @deprecated use Ext.lib.Dom.getStyle
           * @static
           */
          getStyle: function(el, styleProp) {
              return Ext.fly(el).getStyle(styleProp);
          },
  
          /**
           * Gets the scrollTop
           * @method getScrollTop
           * @return {int} the document's scrollTop
           * @static
           */
          getScrollTop: function () { return this.getScroll().top; },
  
          /**
           * Gets the scrollLeft
           * @method getScrollLeft
           * @return {int} the document's scrollTop
           * @static
           */
          getScrollLeft: function () { return this.getScroll().left; },
  
          /**
           * Sets the x/y position of an element to the location of the
           * target element.
           * @method moveToEl
           * @param {HTMLElement} moveEl      The element to move
           * @param {HTMLElement} targetEl    The position reference element
           * @static
           */
          moveToEl: function (moveEl, targetEl) {
              var aCoord = Ext.lib.Dom.getXY(targetEl);
              Ext.lib.Dom.setXY(moveEl, aCoord);
          },
  
          /**
           * Numeric array sort function
           * @method numericSort
           * @static
           */
          numericSort: function(a, b) { return (a - b); },
  
          /**
           * Internal counter
           * @property _timeoutCount
           * @private
           * @static
           */
          _timeoutCount: 0,
  
          /**
           * Trying to make the load order less important.  Without this we get
           * an error if this file is loaded before the Event Utility.
           * @method _addListeners
           * @private
           * @static
           */
          _addListeners: function() {
              var DDM = Ext.dd.DDM;
              if ( Ext.lib.Event && document ) {
                  DDM._onLoad();
              } else {
                  if (DDM._timeoutCount > 2000) {
                  } else {
                      setTimeout(DDM._addListeners, 10);
                      if (document && document.body) {
                          DDM._timeoutCount += 1;
                      }
                  }
              }
          },
  
          /**
           * Recursively searches the immediate parent and all child nodes for
           * the handle element in order to determine wheter or not it was
           * clicked.
           * @method handleWasClicked
           * @param node the html element to inspect
           * @static
           */
          handleWasClicked: function(node, id) {
              if (this.isHandle(id, node.id)) {
                  return true;
              } else {
                  // check to see if this is a text node child of the one we want
                  var p = node.parentNode;
  
                  while (p) {
                      if (this.isHandle(id, p.id)) {
                          return true;
                      } else {
                          p = p.parentNode;
                      }
                  }
              }
  
              return false;
          }
  
      };
  
  }();
  
  // shorter alias, save a few bytes
  Ext.dd.DDM = Ext.dd.DragDropMgr;
  Ext.dd.DDM._addListeners();
  
  }
  
  /**
   * @class Ext.dd.DD
   * A DragDrop implementation where the linked element follows the
   * mouse cursor during a drag.
   * @extends Ext.dd.DragDrop
   * @constructor
   * @param {String} id the id of the linked element
   * @param {String} sGroup the group of related DragDrop items
   * @param {object} config an object containing configurable attributes
   *                Valid properties for DD:
   *                    scroll
   */
  Ext.dd.DD = function(id, sGroup, config) {
      if (id) {
          this.init(id, sGroup, config);
      }
  };
  
  Ext.extend(Ext.dd.DD, Ext.dd.DragDrop, {
  
      /**
       * When set to true, the utility automatically tries to scroll the browser
       * window when a drag and drop element is dragged near the viewport boundary.
       * Defaults to true.
       * @property scroll
       * @type boolean
       */
      scroll: true,
  
      /**
       * Sets the pointer offset to the distance between the linked element's top
       * left corner and the location the element was clicked
       * @method autoOffset
       * @param {int} iPageX the X coordinate of the click
       * @param {int} iPageY the Y coordinate of the click
       */
      autoOffset: function(iPageX, iPageY) {
          var x = iPageX - this.startPageX;
          var y = iPageY - this.startPageY;
          this.setDelta(x, y);
      },
  
      /**
       * Sets the pointer offset.  You can call this directly to force the
       * offset to be in a particular location (e.g., pass in 0,0 to set it
       * to the center of the object)
       * @method setDelta
       * @param {int} iDeltaX the distance from the left
       * @param {int} iDeltaY the distance from the top
       */
      setDelta: function(iDeltaX, iDeltaY) {
          this.deltaX = iDeltaX;
          this.deltaY = iDeltaY;
      },
  
      /**
       * Sets the drag element to the location of the mousedown or click event,
       * maintaining the cursor location relative to the location on the element
       * that was clicked.  Override this if you want to place the element in a
       * location other than where the cursor is.
       * @method setDragElPos
       * @param {int} iPageX the X coordinate of the mousedown or drag event
       * @param {int} iPageY the Y coordinate of the mousedown or drag event
       */
      setDragElPos: function(iPageX, iPageY) {
          // the first time we do this, we are going to check to make sure
          // the element has css positioning
  
          var el = this.getDragEl();
          this.alignElWithMouse(el, iPageX, iPageY);
      },
  
      /**
       * Sets the element to the location of the mousedown or click event,
       * maintaining the cursor location relative to the location on the element
       * that was clicked.  Override this if you want to place the element in a
       * location other than where the cursor is.
       * @method alignElWithMouse
       * @param {HTMLElement} el the element to move
       * @param {int} iPageX the X coordinate of the mousedown or drag event
       * @param {int} iPageY the Y coordinate of the mousedown or drag event
       */
      alignElWithMouse: function(el, iPageX, iPageY) {
          var oCoord = this.getTargetCoord(iPageX, iPageY);
          var fly = el.dom ? el : Ext.fly(el, '_dd');
          if (!this.deltaSetXY) {
              var aCoord = [oCoord.x, oCoord.y];
              fly.setXY(aCoord);
              var newLeft = fly.getLeft(true);
              var newTop  = fly.getTop(true);
              this.deltaSetXY = [ newLeft - oCoord.x, newTop - oCoord.y ];
          } else {
              fly.setLeftTop(oCoord.x + this.deltaSetXY[0], oCoord.y + this.deltaSetXY[1]);
          }
  
          this.cachePosition(oCoord.x, oCoord.y);
          this.autoScroll(oCoord.x, oCoord.y, el.offsetHeight, el.offsetWidth);
          return oCoord;
      },
  
      /**
       * Saves the most recent position so that we can reset the constraints and
       * tick marks on-demand.  We need to know this so that we can calculate the
       * number of pixels the element is offset from its original position.
       * @method cachePosition
       * @param iPageX the current x position (optional, this just makes it so we
       * don't have to look it up again)
       * @param iPageY the current y position (optional, this just makes it so we
       * don't have to look it up again)
       */
      cachePosition: function(iPageX, iPageY) {
          if (iPageX) {
              this.lastPageX = iPageX;
              this.lastPageY = iPageY;
          } else {
              var aCoord = Ext.lib.Dom.getXY(this.getEl());
              this.lastPageX = aCoord[0];
              this.lastPageY = aCoord[1];
          }
      },
  
      /**
       * Auto-scroll the window if the dragged object has been moved beyond the
       * visible window boundary.
       * @method autoScroll
       * @param {int} x the drag element's x position
       * @param {int} y the drag element's y position
       * @param {int} h the height of the drag element
       * @param {int} w the width of the drag element
       * @private
       */
      autoScroll: function(x, y, h, w) {
  
          if (this.scroll) {
              // The client height
              var clientH = Ext.lib.Dom.getViewHeight();
  
              // The client width
              var clientW = Ext.lib.Dom.getViewWidth();
  
              // The amt scrolled down
              var st = this.DDM.getScrollTop();
  
              // The amt scrolled right
              var sl = this.DDM.getScrollLeft();
  
              // Location of the bottom of the element
              var bot = h + y;
  
              // Location of the right of the element
              var right = w + x;
  
              // The distance from the cursor to the bottom of the visible area,
              // adjusted so that we don't scroll if the cursor is beyond the
              // element drag constraints
              var toBot = (clientH + st - y - this.deltaY);
  
              // The distance from the cursor to the right of the visible area
              var toRight = (clientW + sl - x - this.deltaX);
  
  
              // How close to the edge the cursor must be before we scroll
              // var thresh = (document.all) ? 100 : 40;
              var thresh = 40;
  
              // How many pixels to scroll per autoscroll op.  This helps to reduce
              // clunky scrolling. IE is more sensitive about this ... it needs this
              // value to be higher.
              var scrAmt = (document.all) ? 80 : 30;
  
              // Scroll down if we are near the bottom of the visible page and the
              // obj extends below the crease
              if ( bot > clientH && toBot < thresh ) {
                  window.scrollTo(sl, st + scrAmt);
              }
  
              // Scroll up if the window is scrolled down and the top of the object
              // goes above the top border
              if ( y < st && st > 0 && y - st < thresh ) {
                  window.scrollTo(sl, st - scrAmt);
              }
  
              // Scroll right if the obj is beyond the right border and the cursor is
              // near the border.
              if ( right > clientW && toRight < thresh ) {
                  window.scrollTo(sl + scrAmt, st);
              }
  
              // Scroll left if the window has been scrolled to the right and the obj
              // extends past the left border
              if ( x < sl && sl > 0 && x - sl < thresh ) {
                  window.scrollTo(sl - scrAmt, st);
              }
          }
      },
  
      /**
       * Finds the location the element should be placed if we want to move
       * it to where the mouse location less the click offset would place us.
       * @method getTargetCoord
       * @param {int} iPageX the X coordinate of the click
       * @param {int} iPageY the Y coordinate of the click
       * @return an object that contains the coordinates (Object.x and Object.y)
       * @private
       */
      getTargetCoord: function(iPageX, iPageY) {
  
  
          var x = iPageX - this.deltaX;
          var y = iPageY - this.deltaY;
  
          if (this.constrainX) {
              if (x < this.minX) { x = this.minX; }
              if (x > this.maxX) { x = this.maxX; }
          }
  
          if (this.constrainY) {
              if (y < this.minY) { y = this.minY; }
              if (y > this.maxY) { y = this.maxY; }
          }
  
          x = this.getTick(x, this.xTicks);
          y = this.getTick(y, this.yTicks);
  
  
          return {x:x, y:y};
      },
  
      /**
       * Sets up config options specific to this class. Overrides
       * Ext.dd.DragDrop, but all versions of this method through the
       * inheritance chain are called
       */
      applyConfig: function() {
          Ext.dd.DD.superclass.applyConfig.call(this);
          this.scroll = (this.config.scroll !== false);
      },
  
      /**
       * Event that fires prior to the onMouseDown event.  Overrides
       * Ext.dd.DragDrop.
       */
      b4MouseDown: function(e) {
          // this.resetConstraints();
          this.autoOffset(e.getPageX(),
                              e.getPageY());
      },
  
      /**
       * Event that fires prior to the onDrag event.  Overrides
       * Ext.dd.DragDrop.
       */
      b4Drag: function(e) {
          this.setDragElPos(e.getPageX(),
                              e.getPageY());
      },
  
      toString: function() {
          return ("DD " + this.id);
      }
  
      //////////////////////////////////////////////////////////////////////////
      // Debugging ygDragDrop events that can be overridden
      //////////////////////////////////////////////////////////////////////////
      /*
      startDrag: function(x, y) {
      },
  
      onDrag: function(e) {
      },
  
      onDragEnter: function(e, id) {
      },
  
      onDragOver: function(e, id) {
      },
  
      onDragOut: function(e, id) {
      },
  
      onDragDrop: function(e, id) {
      },
  
      endDrag: function(e) {
      }
  
      */
  
  });
  /**
   * @class Ext.dd.DDProxy
   * A DragDrop implementation that inserts an empty, bordered div into
   * the document that follows the cursor during drag operations.  At the time of
   * the click, the frame div is resized to the dimensions of the linked html
   * element, and moved to the exact location of the linked element.
   *
   * References to the "frame" element refer to the single proxy element that
   * was created to be dragged in place of all DDProxy elements on the
   * page.
   *
   * @extends Ext.dd.DD
   * @constructor
   * @param {String} id the id of the linked html element
   * @param {String} sGroup the group of related DragDrop objects
   * @param {object} config an object containing configurable attributes
   *                Valid properties for DDProxy in addition to those in DragDrop:
   *                   resizeFrame, centerFrame, dragElId
   */
  Ext.dd.DDProxy = function(id, sGroup, config) {
      if (id) {
          this.init(id, sGroup, config);
          this.initFrame();
      }
  };
  
  /**
   * The default drag frame div id
   * @property Ext.dd.DDProxy.dragElId
   * @type String
   * @static
   */
  Ext.dd.DDProxy.dragElId = "ygddfdiv";
  
  Ext.extend(Ext.dd.DDProxy, Ext.dd.DD, {
  
      /**
       * By default we resize the drag frame to be the same size as the element
       * we want to drag (this is to get the frame effect).  We can turn it off
       * if we want a different behavior.
       * @property resizeFrame
       * @type boolean
       */
      resizeFrame: true,
  
      /**
       * By default the frame is positioned exactly where the drag element is, so
       * we use the cursor offset provided by Ext.dd.DD.  Another option that works only if
       * you do not have constraints on the obj is to have the drag frame centered
       * around the cursor.  Set centerFrame to true for this effect.
       * @property centerFrame
       * @type boolean
       */
      centerFrame: false,
  
      /**
       * Creates the proxy element if it does not yet exist
       * @method createFrame
       */
      createFrame: function() {
          var self = this;
          var body = document.body;
  
          if (!body || !body.firstChild) {
              setTimeout( function() { self.createFrame(); }, 50 );
              return;
          }
  
          var div = this.getDragEl();
  
          if (!div) {
              div    = document.createElement("div");
              div.id = this.dragElId;
              var s  = div.style;
  
              s.position   = "absolute";
              s.visibility = "hidden";
              s.cursor     = "move";
              s.border     = "2px solid #aaa";
              s.zIndex     = 999;
  
              // appendChild can blow up IE if invoked prior to the window load event
              // while rendering a table.  It is possible there are other scenarios
              // that would cause this to happen as well.
              body.insertBefore(div, body.firstChild);
          }
      },
  
      /**
       * Initialization for the drag frame element.  Must be called in the
       * constructor of all subclasses
       * @method initFrame
       */
      initFrame: function() {
          this.createFrame();
      },
  
      applyConfig: function() {
          Ext.dd.DDProxy.superclass.applyConfig.call(this);
  
          this.resizeFrame = (this.config.resizeFrame !== false);
          this.centerFrame = (this.config.centerFrame);
          this.setDragElId(this.config.dragElId || Ext.dd.DDProxy.dragElId);
      },
  
      /**
       * Resizes the drag frame to the dimensions of the clicked object, positions
       * it over the object, and finally displays it
       * @method showFrame
       * @param {int} iPageX X click position
       * @param {int} iPageY Y click position
       * @private
       */
      showFrame: function(iPageX, iPageY) {
          var el = this.getEl();
          var dragEl = this.getDragEl();
          var s = dragEl.style;
  
          this._resizeProxy();
  
          if (this.centerFrame) {
              this.setDelta( Math.round(parseInt(s.width,  10)/2),
                             Math.round(parseInt(s.height, 10)/2) );
          }
  
          this.setDragElPos(iPageX, iPageY);
  
          Ext.fly(dragEl).show();
      },
  
      /**
       * The proxy is automatically resized to the dimensions of the linked
       * element when a drag is initiated, unless resizeFrame is set to false
       * @method _resizeProxy
       * @private
       */
      _resizeProxy: function() {
          if (this.resizeFrame) {
              var el = this.getEl();
              Ext.fly(this.getDragEl()).setSize(el.offsetWidth, el.offsetHeight);
          }
      },
  
      // overrides Ext.dd.DragDrop
      b4MouseDown: function(e) {
          var x = e.getPageX();
          var y = e.getPageY();
          this.autoOffset(x, y);
          this.setDragElPos(x, y);
      },
  
      // overrides Ext.dd.DragDrop
      b4StartDrag: function(x, y) {
          // show the drag frame
          this.showFrame(x, y);
      },
  
      // overrides Ext.dd.DragDrop
      b4EndDrag: function(e) {
          Ext.fly(this.getDragEl()).hide();
      },
  
      // overrides Ext.dd.DragDrop
      // By default we try to move the element to the last location of the frame.
      // This is so that the default behavior mirrors that of Ext.dd.DD.
      endDrag: function(e) {
  
          var lel = this.getEl();
          var del = this.getDragEl();
  
          // Show the drag frame briefly so we can get its position
          del.style.visibility = "";
  
          this.beforeMove();
          // Hide the linked element before the move to get around a Safari
          // rendering bug.
          lel.style.visibility = "hidden";
          Ext.dd.DDM.moveToEl(lel, del);
          del.style.visibility = "hidden";
          lel.style.visibility = "";
  
          this.afterDrag();
      },
  
      beforeMove : function(){
  
      },
  
      afterDrag : function(){
  
      },
  
      toString: function() {
          return ("DDProxy " + this.id);
      }
  
  });
  /**
   * @class Ext.dd.DDTarget
   * A DragDrop implementation that does not move, but can be a drop
   * target.  You would get the same result by simply omitting implementation
   * for the event callbacks, but this way we reduce the processing cost of the
   * event listener and the callbacks.
   * @extends Ext.dd.DragDrop
   * @constructor
   * @param {String} id the id of the element that is a drop target
   * @param {String} sGroup the group of related DragDrop objects
   * @param {object} config an object containing configurable attributes
   *                 Valid properties for DDTarget in addition to those in
   *                 DragDrop:
   *                    none
   */
  Ext.dd.DDTarget = function(id, sGroup, config) {
      if (id) {
          this.initTarget(id, sGroup, config);
      }
  };
  
  // Ext.dd.DDTarget.prototype = new Ext.dd.DragDrop();
  Ext.extend(Ext.dd.DDTarget, Ext.dd.DragDrop, {
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      getDragEl: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      isValidHandleChild: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      startDrag: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      endDrag: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      onDrag: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      onDragDrop: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      onDragEnter: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      onDragOut: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      onDragOver: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      onInvalidDrop: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      onMouseDown: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      onMouseUp: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      setXConstraint: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      setYConstraint: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      resetConstraints: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      clearConstraints: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      clearTicks: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      setInitPosition: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      setDragElId: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      setHandleElId: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      setOuterHandleElId: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      addInvalidHandleClass: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      addInvalidHandleId: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      addInvalidHandleType: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      removeInvalidHandleClass: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      removeInvalidHandleId: Ext.emptyFn,
      /**
       * @hide
       * Overridden and disabled. A DDTarget does not support being dragged.
       * @method
       */
      removeInvalidHandleType: Ext.emptyFn,
  
      toString: function() {
          return ("DDTarget " + this.id);
      }
  });/**
   * @class Ext.dd.DragTracker
   * @extends Ext.util.Observable
   */
  Ext.dd.DragTracker = Ext.extend(Ext.util.Observable,  {
      /**
       * @cfg {Boolean} active
  	 * Defaults to <tt>false</tt>.
  	 */	
      active: false,
      /**
       * @cfg {Number} tolerance
  	 * Defaults to <tt>5</tt>.
  	 */	
      tolerance: 5,
      /**
       * @cfg {Boolean/Number} autoStart
  	 * Defaults to <tt>false</tt>. Specify <tt>true</tt> to defer trigger start by 1000 ms.
  	 * Specify a Number for the number of milliseconds to defer trigger start.
  	 */	
      autoStart: false,
      
      constructor : function(config){
          Ext.apply(this, config);
  	    this.addEvents(
  	        /**
  	         * @event mousedown
  	         * @param {Object} this
  	         * @param {Object} e event object
  	         */
  	        'mousedown',
  	        /**
  	         * @event mouseup
  	         * @param {Object} this
  	         * @param {Object} e event object
  	         */
  	        'mouseup',
  	        /**
  	         * @event mousemove
  	         * @param {Object} this
  	         * @param {Object} e event object
  	         */
  	        'mousemove',
  	        /**
  	         * @event dragstart
  	         * @param {Object} this
  	         * @param {Object} startXY the page coordinates of the event
  	         */
  	        'dragstart',
  	        /**
  	         * @event dragend
  	         * @param {Object} this
  	         * @param {Object} e event object
  	         */
  	        'dragend',
  	        /**
  	         * @event drag
  	         * @param {Object} this
  	         * @param {Object} e event object
  	         */
  	        'drag'
  	    );
  	
  	    this.dragRegion = new Ext.lib.Region(0,0,0,0);
  	
  	    if(this.el){
  	        this.initEl(this.el);
  	    }
          Ext.dd.DragTracker.superclass.constructor.call(this, config);
      },
  
      initEl: function(el){
          this.el = Ext.get(el);
          el.on('mousedown', this.onMouseDown, this,
                  this.delegate ? {delegate: this.delegate} : undefined);
      },
  
      destroy : function(){
          this.el.un('mousedown', this.onMouseDown, this);
      },
  
      onMouseDown: function(e, target){
          if(this.fireEvent('mousedown', this, e) !== false && this.onBeforeStart(e) !== false){
              this.startXY = this.lastXY = e.getXY();
              this.dragTarget = this.delegate ? target : this.el.dom;
              if(this.preventDefault !== false){
                  e.preventDefault();
              }
              var doc = Ext.getDoc();
              doc.on('mouseup', this.onMouseUp, this);
              doc.on('mousemove', this.onMouseMove, this);
              doc.on('selectstart', this.stopSelect, this);
              if(this.autoStart){
                  this.timer = this.triggerStart.defer(this.autoStart === true ? 1000 : this.autoStart, this);
              }
          }
      },
  
      onMouseMove: function(e, target){
          // HACK: IE hack to see if button was released outside of window. */
          if(this.active && Ext.isIE && !e.browserEvent.button){
              e.preventDefault();
              this.onMouseUp(e);
              return;
          }
  
          e.preventDefault();
          var xy = e.getXY(), s = this.startXY;
          this.lastXY = xy;
          if(!this.active){
              if(Math.abs(s[0]-xy[0]) > this.tolerance || Math.abs(s[1]-xy[1]) > this.tolerance){
                  this.triggerStart();
              }else{
                  return;
              }
          }
          this.fireEvent('mousemove', this, e);
          this.onDrag(e);
          this.fireEvent('drag', this, e);
      },
  
      onMouseUp: function(e){
          var doc = Ext.getDoc();
          doc.un('mousemove', this.onMouseMove, this);
          doc.un('mouseup', this.onMouseUp, this);
          doc.un('selectstart', this.stopSelect, this);
          e.preventDefault();
          this.clearStart();
          var wasActive = this.active;
          this.active = false;
          delete this.elRegion;
          this.fireEvent('mouseup', this, e);
          if(wasActive){
              this.onEnd(e);
              this.fireEvent('dragend', this, e);
          }
      },
  
      triggerStart: function(isTimer){
          this.clearStart();
          this.active = true;
          this.onStart(this.startXY);
          this.fireEvent('dragstart', this, this.startXY);
      },
  
      clearStart : function(){
          if(this.timer){
              clearTimeout(this.timer);
              delete this.timer;
          }
      },
  
      stopSelect : function(e){
          e.stopEvent();
          return false;
      },
  
      onBeforeStart : function(e){
  
      },
  
      onStart : function(xy){
  
      },
  
      onDrag : function(e){
  
      },
  
      onEnd : function(e){
  
      },
  
      getDragTarget : function(){
          return this.dragTarget;
      },
  
      getDragCt : function(){
          return this.el;
      },
  
      getXY : function(constrain){
          return constrain ?
                 this.constrainModes[constrain].call(this, this.lastXY) : this.lastXY;
      },
  
      getOffset : function(constrain){
          var xy = this.getXY(constrain);
          var s = this.startXY;
          return [s[0]-xy[0], s[1]-xy[1]];
      },
  
      constrainModes: {
          'point' : function(xy){
  
              if(!this.elRegion){
                  this.elRegion = this.getDragCt().getRegion();
              }
  
              var dr = this.dragRegion;
  
              dr.left = xy[0];
              dr.top = xy[1];
              dr.right = xy[0];
              dr.bottom = xy[1];
  
              dr.constrainTo(this.elRegion);
  
              return [dr.left, dr.top];
          }
      }
  });/**
   * @class Ext.dd.ScrollManager
   * <p>Provides automatic scrolling of overflow regions in the page during drag operations.</p>
   * <p>The ScrollManager configs will be used as the defaults for any scroll container registered with it,
   * but you can also override most of the configs per scroll container by adding a 
   * <tt>ddScrollConfig</tt> object to the target element that contains these properties: {@link #hthresh},
   * {@link #vthresh}, {@link #increment} and {@link #frequency}.  Example usage:
   * <pre><code>
  var el = Ext.get('scroll-ct');
  el.ddScrollConfig = {
      vthresh: 50,
      hthresh: -1,
      frequency: 100,
      increment: 200
  };
  Ext.dd.ScrollManager.register(el);
  </code></pre>
   * <b>Note: This class uses "Point Mode" and is untested in "Intersect Mode".</b>
   * @singleton
   */
  Ext.dd.ScrollManager = function(){
      var ddm = Ext.dd.DragDropMgr;
      var els = {};
      var dragEl = null;
      var proc = {};
      
      var onStop = function(e){
          dragEl = null;
          clearProc();
      };
      
      var triggerRefresh = function(){
          if(ddm.dragCurrent){
               ddm.refreshCache(ddm.dragCurrent.groups);
          }
      };
      
      var doScroll = function(){
          if(ddm.dragCurrent){
              var dds = Ext.dd.ScrollManager;
              var inc = proc.el.ddScrollConfig ?
                        proc.el.ddScrollConfig.increment : dds.increment;
              if(!dds.animate){
                  if(proc.el.scroll(proc.dir, inc)){
                      triggerRefresh();
                  }
              }else{
                  proc.el.scroll(proc.dir, inc, true, dds.animDuration, triggerRefresh);
              }
          }
      };
      
      var clearProc = function(){
          if(proc.id){
              clearInterval(proc.id);
          }
          proc.id = 0;
          proc.el = null;
          proc.dir = "";
      };
      
      var startProc = function(el, dir){
          clearProc();
          proc.el = el;
          proc.dir = dir;
          var freq = (el.ddScrollConfig && el.ddScrollConfig.frequency) ? 
                  el.ddScrollConfig.frequency : Ext.dd.ScrollManager.frequency;
          proc.id = setInterval(doScroll, freq);
      };
      
      var onFire = function(e, isDrop){
          if(isDrop || !ddm.dragCurrent){ return; }
          var dds = Ext.dd.ScrollManager;
          if(!dragEl || dragEl != ddm.dragCurrent){
              dragEl = ddm.dragCurrent;
              // refresh regions on drag start
              dds.refreshCache();
          }
          
          var xy = Ext.lib.Event.getXY(e);
          var pt = new Ext.lib.Point(xy[0], xy[1]);
          for(var id in els){
              var el = els[id], r = el._region;
              var c = el.ddScrollConfig ? el.ddScrollConfig : dds;
              if(r && r.contains(pt) && el.isScrollable()){
                  if(r.bottom - pt.y <= c.vthresh){
                      if(proc.el != el){
                          startProc(el, "down");
                      }
                      return;
                  }else if(r.right - pt.x <= c.hthresh){
                      if(proc.el != el){
                          startProc(el, "left");
                      }
                      return;
                  }else if(pt.y - r.top <= c.vthresh){
                      if(proc.el != el){
                          startProc(el, "up");
                      }
                      return;
                  }else if(pt.x - r.left <= c.hthresh){
                      if(proc.el != el){
                          startProc(el, "right");
                      }
                      return;
                  }
              }
          }
          clearProc();
      };
      
      ddm.fireEvents = ddm.fireEvents.createSequence(onFire, ddm);
      ddm.stopDrag = ddm.stopDrag.createSequence(onStop, ddm);
      
      return {
          /**
           * Registers new overflow element(s) to auto scroll
           * @param {Mixed/Array} el The id of or the element to be scrolled or an array of either
           */
          register : function(el){
              if(Ext.isArray(el)){
                  for(var i = 0, len = el.length; i < len; i++) {
                  	this.register(el[i]);
                  }
              }else{
                  el = Ext.get(el);
                  els[el.id] = el;
              }
          },
          
          /**
           * Unregisters overflow element(s) so they are no longer scrolled
           * @param {Mixed/Array} el The id of or the element to be removed or an array of either
           */
          unregister : function(el){
              if(Ext.isArray(el)){
                  for(var i = 0, len = el.length; i < len; i++) {
                  	this.unregister(el[i]);
                  }
              }else{
                  el = Ext.get(el);
                  delete els[el.id];
              }
          },
          
          /**
           * The number of pixels from the top or bottom edge of a container the pointer needs to be to
           * trigger scrolling (defaults to 25)
           * @type Number
           */
          vthresh : 25,
          /**
           * The number of pixels from the right or left edge of a container the pointer needs to be to
           * trigger scrolling (defaults to 25)
           * @type Number
           */
          hthresh : 25,
  
          /**
           * The number of pixels to scroll in each scroll increment (defaults to 50)
           * @type Number
           */
          increment : 100,
          
          /**
           * The frequency of scrolls in milliseconds (defaults to 500)
           * @type Number
           */
          frequency : 500,
          
          /**
           * True to animate the scroll (defaults to true)
           * @type Boolean
           */
          animate: true,
          
          /**
           * The animation duration in seconds - 
           * MUST BE less than Ext.dd.ScrollManager.frequency! (defaults to .4)
           * @type Number
           */
          animDuration: .4,
          
          /**
           * Manually trigger a cache refresh.
           */
          refreshCache : function(){
              for(var id in els){
                  if(typeof els[id] == 'object'){ // for people extending the object prototype
                      els[id]._region = els[id].getRegion();
                  }
              }
          }
      };
  }();/**
   * @class Ext.dd.Registry
   * Provides easy access to all drag drop components that are registered on a page.  Items can be retrieved either
   * directly by DOM node id, or by passing in the drag drop event that occurred and looking up the event target.
   * @singleton
   */
  Ext.dd.Registry = function(){
      var elements = {}; 
      var handles = {}; 
      var autoIdSeed = 0;
  
      var getId = function(el, autogen){
          if(typeof el == "string"){
              return el;
          }
          var id = el.id;
          if(!id && autogen !== false){
              id = "extdd-" + (++autoIdSeed);
              el.id = id;
          }
          return id;
      };
      
      return {
      /**
       * Resgister a drag drop element
       * @param {String/HTMLElement) element The id or DOM node to register
       * @param {Object} data (optional) An custom data object that will be passed between the elements that are involved
       * in drag drop operations.  You can populate this object with any arbitrary properties that your own code
       * knows how to interpret, plus there are some specific properties known to the Registry that should be
       * populated in the data object (if applicable):
       * <pre>
  Value      Description<br />
  ---------  ------------------------------------------<br />
  handles    Array of DOM nodes that trigger dragging<br />
             for the element being registered<br />
  isHandle   True if the element passed in triggers<br />
             dragging itself, else false
  </pre>
       */
          register : function(el, data){
              data = data || {};
              if(typeof el == "string"){
                  el = document.getElementById(el);
              }
              data.ddel = el;
              elements[getId(el)] = data;
              if(data.isHandle !== false){
                  handles[data.ddel.id] = data;
              }
              if(data.handles){
                  var hs = data.handles;
                  for(var i = 0, len = hs.length; i < len; i++){
                  	handles[getId(hs[i])] = data;
                  }
              }
          },
  
      /**
       * Unregister a drag drop element
       * @param {String/HTMLElement) element The id or DOM node to unregister
       */
          unregister : function(el){
              var id = getId(el, false);
              var data = elements[id];
              if(data){
                  delete elements[id];
                  if(data.handles){
                      var hs = data.handles;
                      for(var i = 0, len = hs.length; i < len; i++){
                      	delete handles[getId(hs[i], false)];
                      }
                  }
              }
          },
  
      /**
       * Returns the handle registered for a DOM Node by id
       * @param {String/HTMLElement} id The DOM node or id to look up
       * @return {Object} handle The custom handle data
       */
          getHandle : function(id){
              if(typeof id != "string"){ // must be element?
                  id = id.id;
              }
              return handles[id];
          },
  
      /**
       * Returns the handle that is registered for the DOM node that is the target of the event
       * @param {Event} e The event
       * @return {Object} handle The custom handle data
       */
          getHandleFromEvent : function(e){
              var t = Ext.lib.Event.getTarget(e);
              return t ? handles[t.id] : null;
          },
  
      /**
       * Returns a custom data object that is registered for a DOM node by id
       * @param {String/HTMLElement} id The DOM node or id to look up
       * @return {Object} data The custom data
       */
          getTarget : function(id){
              if(typeof id != "string"){ // must be element?
                  id = id.id;
              }
              return elements[id];
          },
  
      /**
       * Returns a custom data object that is registered for the DOM node that is the target of the event
       * @param {Event} e The event
       * @return {Object} data The custom data
       */
          getTargetFromEvent : function(e){
              var t = Ext.lib.Event.getTarget(e);
              return t ? elements[t.id] || handles[t.id] : null;
          }
      };
  }();/**
   * @class Ext.dd.StatusProxy
   * A specialized drag proxy that supports a drop status icon, {@link Ext.Layer} styles and auto-repair.  This is the
   * default drag proxy used by all Ext.dd components.
   * @constructor
   * @param {Object} config
   */
  Ext.dd.StatusProxy = function(config){
      Ext.apply(this, config);
      this.id = this.id || Ext.id();
      this.el = new Ext.Layer({
          dh: {
              id: this.id, tag: "div", cls: "x-dd-drag-proxy "+this.dropNotAllowed, children: [
                  {tag: "div", cls: "x-dd-drop-icon"},
                  {tag: "div", cls: "x-dd-drag-ghost"}
              ]
          }, 
          shadow: !config || config.shadow !== false
      });
      this.ghost = Ext.get(this.el.dom.childNodes[1]);
      this.dropStatus = this.dropNotAllowed;
  };
  
  Ext.dd.StatusProxy.prototype = {
      /**
       * @cfg {String} dropAllowed
       * The CSS class to apply to the status element when drop is allowed (defaults to "x-dd-drop-ok").
       */
      dropAllowed : "x-dd-drop-ok",
      /**
       * @cfg {String} dropNotAllowed
       * The CSS class to apply to the status element when drop is not allowed (defaults to "x-dd-drop-nodrop").
       */
      dropNotAllowed : "x-dd-drop-nodrop",
  
      /**
       * Updates the proxy's visual element to indicate the status of whether or not drop is allowed
       * over the current target element.
       * @param {String} cssClass The css class for the new drop status indicator image
       */
      setStatus : function(cssClass){
          cssClass = cssClass || this.dropNotAllowed;
          if(this.dropStatus != cssClass){
              this.el.replaceClass(this.dropStatus, cssClass);
              this.dropStatus = cssClass;
          }
      },
  
      /**
       * Resets the status indicator to the default dropNotAllowed value
       * @param {Boolean} clearGhost True to also remove all content from the ghost, false to preserve it
       */
      reset : function(clearGhost){
          this.el.dom.className = "x-dd-drag-proxy " + this.dropNotAllowed;
          this.dropStatus = this.dropNotAllowed;
          if(clearGhost){
              this.ghost.update("");
          }
      },
  
      /**
       * Updates the contents of the ghost element
       * @param {String/HTMLElement} html The html that will replace the current innerHTML of the ghost element, or a
       * DOM node to append as the child of the ghost element (in which case the innerHTML will be cleared first).
       */
      update : function(html){
          if(typeof html == "string"){
              this.ghost.update(html);
          }else{
              this.ghost.update("");
              html.style.margin = "0";
              this.ghost.dom.appendChild(html);
          }
          var el = this.ghost.dom.firstChild; 
          if(el){
              Ext.fly(el).setStyle('float', 'none');
          }
      },
  
      /**
       * Returns the underlying proxy {@link Ext.Layer}
       * @return {Ext.Layer} el
      */
      getEl : function(){
          return this.el;
      },
  
      /**
       * Returns the ghost element
       * @return {Ext.Element} el
       */
      getGhost : function(){
          return this.ghost;
      },
  
      /**
       * Hides the proxy
       * @param {Boolean} clear True to reset the status and clear the ghost contents, false to preserve them
       */
      hide : function(clear){
          this.el.hide();
          if(clear){
              this.reset(true);
          }
      },
  
      /**
       * Stops the repair animation if it's currently running
       */
      stop : function(){
          if(this.anim && this.anim.isAnimated && this.anim.isAnimated()){
              this.anim.stop();
          }
      },
  
      /**
       * Displays this proxy
       */
      show : function(){
          this.el.show();
      },
  
      /**
       * Force the Layer to sync its shadow and shim positions to the element
       */
      sync : function(){
          this.el.sync();
      },
  
      /**
       * Causes the proxy to return to its position of origin via an animation.  Should be called after an
       * invalid drop operation by the item being dragged.
       * @param {Array} xy The XY position of the element ([x, y])
       * @param {Function} callback The function to call after the repair is complete.
       * @param {Object} scope The scope (<code>this</code> reference) in which the callback function is executed. Defaults to the browser window.
       */
      repair : function(xy, callback, scope){
          this.callback = callback;
          this.scope = scope;
          if(xy && this.animRepair !== false){
              this.el.addClass("x-dd-drag-repair");
              this.el.hideUnders(true);
              this.anim = this.el.shift({
                  duration: this.repairDuration || .5,
                  easing: 'easeOut',
                  xy: xy,
                  stopFx: true,
                  callback: this.afterRepair,
                  scope: this
              });
          }else{
              this.afterRepair();
          }
      },
  
      // private
      afterRepair : function(){
          this.hide(true);
          if(typeof this.callback == "function"){
              this.callback.call(this.scope || this);
          }
          this.callback = null;
          this.scope = null;
      },
      
      destroy: function(){
          Ext.destroy(this.ghost, this.el);    
      }
  };/**
   * @class Ext.dd.DragSource
   * @extends Ext.dd.DDProxy
   * A simple class that provides the basic implementation needed to make any element draggable.
   * @constructor
   * @param {Mixed} el The container element
   * @param {Object} config
   */
  Ext.dd.DragSource = function(el, config){
      this.el = Ext.get(el);
      if(!this.dragData){
          this.dragData = {};
      }
      
      Ext.apply(this, config);
      
      if(!this.proxy){
          this.proxy = new Ext.dd.StatusProxy();
      }
      Ext.dd.DragSource.superclass.constructor.call(this, this.el.dom, this.ddGroup || this.group, 
            {dragElId : this.proxy.id, resizeFrame: false, isTarget: false, scroll: this.scroll === true});
      
      this.dragging = false;
  };
  
  Ext.extend(Ext.dd.DragSource, Ext.dd.DDProxy, {
      /**
       * @cfg {String} ddGroup
       * A named drag drop group to which this object belongs.  If a group is specified, then this object will only
       * interact with other drag drop objects in the same group (defaults to undefined).
       */
      /**
       * @cfg {String} dropAllowed
       * The CSS class returned to the drag source when drop is allowed (defaults to "x-dd-drop-ok").
       */
      dropAllowed : "x-dd-drop-ok",
      /**
       * @cfg {String} dropNotAllowed
       * The CSS class returned to the drag source when drop is not allowed (defaults to "x-dd-drop-nodrop").
       */
      dropNotAllowed : "x-dd-drop-nodrop",
  
      /**
       * Returns the data object associated with this drag source
       * @return {Object} data An object containing arbitrary data
       */
      getDragData : function(e){
          return this.dragData;
      },
  
      // private
      onDragEnter : function(e, id){
          var target = Ext.dd.DragDropMgr.getDDById(id);
          this.cachedTarget = target;
          if(this.beforeDragEnter(target, e, id) !== false){
              if(target.isNotifyTarget){
                  var status = target.notifyEnter(this, e, this.dragData);
                  this.proxy.setStatus(status);
              }else{
                  this.proxy.setStatus(this.dropAllowed);
              }
              
              if(this.afterDragEnter){
                  /**
                   * An empty function by default, but provided so that you can perform a custom action
                   * when the dragged item enters the drop target by providing an implementation.
                   * @param {Ext.dd.DragDrop} target The drop target
                   * @param {Event} e The event object
                   * @param {String} id The id of the dragged element
                   * @method afterDragEnter
                   */
                  this.afterDragEnter(target, e, id);
              }
          }
      },
  
      /**
       * An empty function by default, but provided so that you can perform a custom action
       * before the dragged item enters the drop target and optionally cancel the onDragEnter.
       * @param {Ext.dd.DragDrop} target The drop target
       * @param {Event} e The event object
       * @param {String} id The id of the dragged element
       * @return {Boolean} isValid True if the drag event is valid, else false to cancel
       */
      beforeDragEnter : function(target, e, id){
          return true;
      },
  
      // private
      alignElWithMouse: function() {
          Ext.dd.DragSource.superclass.alignElWithMouse.apply(this, arguments);
          this.proxy.sync();
      },
  
      // private
      onDragOver : function(e, id){
          var target = this.cachedTarget || Ext.dd.DragDropMgr.getDDById(id);
          if(this.beforeDragOver(target, e, id) !== false){
              if(target.isNotifyTarget){
                  var status = target.notifyOver(this, e, this.dragData);
                  this.proxy.setStatus(status);
              }
  
              if(this.afterDragOver){
                  /**
                   * An empty function by default, but provided so that you can perform a custom action
                   * while the dragged item is over the drop target by providing an implementation.
                   * @param {Ext.dd.DragDrop} target The drop target
                   * @param {Event} e The event object
                   * @param {String} id The id of the dragged element
                   * @method afterDragOver
                   */
                  this.afterDragOver(target, e, id);
              }
          }
      },
  
      /**
       * An empty function by default, but provided so that you can perform a custom action
       * while the dragged item is over the drop target and optionally cancel the onDragOver.
       * @param {Ext.dd.DragDrop} target The drop target
       * @param {Event} e The event object
       * @param {String} id The id of the dragged element
       * @return {Boolean} isValid True if the drag event is valid, else false to cancel
       */
      beforeDragOver : function(target, e, id){
          return true;
      },
  
      // private
      onDragOut : function(e, id){
          var target = this.cachedTarget || Ext.dd.DragDropMgr.getDDById(id);
          if(this.beforeDragOut(target, e, id) !== false){
              if(target.isNotifyTarget){
                  target.notifyOut(this, e, this.dragData);
              }
              this.proxy.reset();
              if(this.afterDragOut){
                  /**
                   * An empty function by default, but provided so that you can perform a custom action
                   * after the dragged item is dragged out of the target without dropping.
                   * @param {Ext.dd.DragDrop} target The drop target
                   * @param {Event} e The event object
                   * @param {String} id The id of the dragged element
                   * @method afterDragOut
                   */
                  this.afterDragOut(target, e, id);
              }
          }
          this.cachedTarget = null;
      },
  
      /**
       * An empty function by default, but provided so that you can perform a custom action before the dragged
       * item is dragged out of the target without dropping, and optionally cancel the onDragOut.
       * @param {Ext.dd.DragDrop} target The drop target
       * @param {Event} e The event object
       * @param {String} id The id of the dragged element
       * @return {Boolean} isValid True if the drag event is valid, else false to cancel
       */
      beforeDragOut : function(target, e, id){
          return true;
      },
      
      // private
      onDragDrop : function(e, id){
          var target = this.cachedTarget || Ext.dd.DragDropMgr.getDDById(id);
          if(this.beforeDragDrop(target, e, id) !== false){
              if(target.isNotifyTarget){
                  if(target.notifyDrop(this, e, this.dragData)){ // valid drop?
                      this.onValidDrop(target, e, id);
                  }else{
                      this.onInvalidDrop(target, e, id);
                  }
              }else{
                  this.onValidDrop(target, e, id);
              }
              
              if(this.afterDragDrop){
                  /**
                   * An empty function by default, but provided so that you can perform a custom action
                   * after a valid drag drop has occurred by providing an implementation.
                   * @param {Ext.dd.DragDrop} target The drop target
                   * @param {Event} e The event object
                   * @param {String} id The id of the dropped element
                   * @method afterDragDrop
                   */
                  this.afterDragDrop(target, e, id);
              }
          }
          delete this.cachedTarget;
      },
  
      /**
       * An empty function by default, but provided so that you can perform a custom action before the dragged
       * item is dropped onto the target and optionally cancel the onDragDrop.
       * @param {Ext.dd.DragDrop} target The drop target
       * @param {Event} e The event object
       * @param {String} id The id of the dragged element
       * @return {Boolean} isValid True if the drag drop event is valid, else false to cancel
       */
      beforeDragDrop : function(target, e, id){
          return true;
      },
  
      // private
      onValidDrop : function(target, e, id){
          this.hideProxy();
          if(this.afterValidDrop){
              /**
               * An empty function by default, but provided so that you can perform a custom action
               * after a valid drop has occurred by providing an implementation.
               * @param {Object} target The target DD 
               * @param {Event} e The event object
               * @param {String} id The id of the dropped element
               * @method afterInvalidDrop
               */
              this.afterValidDrop(target, e, id);
          }
      },
  
      // private
      getRepairXY : function(e, data){
          return this.el.getXY();  
      },
  
      // private
      onInvalidDrop : function(target, e, id){
          this.beforeInvalidDrop(target, e, id);
          if(this.cachedTarget){
              if(this.cachedTarget.isNotifyTarget){
                  this.cachedTarget.notifyOut(this, e, this.dragData);
              }
              this.cacheTarget = null;
          }
          this.proxy.repair(this.getRepairXY(e, this.dragData), this.afterRepair, this);
  
          if(this.afterInvalidDrop){
              /**
               * An empty function by default, but provided so that you can perform a custom action
               * after an invalid drop has occurred by providing an implementation.
               * @param {Event} e The event object
               * @param {String} id The id of the dropped element
               * @method afterInvalidDrop
               */
              this.afterInvalidDrop(e, id);
          }
      },
  
      // private
      afterRepair : function(){
          if(Ext.enableFx){
              this.el.highlight(this.hlColor || "c3daf9");
          }
          this.dragging = false;
      },
  
      /**
       * An empty function by default, but provided so that you can perform a custom action after an invalid
       * drop has occurred.
       * @param {Ext.dd.DragDrop} target The drop target
       * @param {Event} e The event object
       * @param {String} id The id of the dragged element
       * @return {Boolean} isValid True if the invalid drop should proceed, else false to cancel
       */
      beforeInvalidDrop : function(target, e, id){
          return true;
      },
  
      // private
      handleMouseDown : function(e){
          if(this.dragging) {
              return;
          }
          var data = this.getDragData(e);
          if(data && this.onBeforeDrag(data, e) !== false){
              this.dragData = data;
              this.proxy.stop();
              Ext.dd.DragSource.superclass.handleMouseDown.apply(this, arguments);
          } 
      },
  
      /**
       * An empty function by default, but provided so that you can perform a custom action before the initial
       * drag event begins and optionally cancel it.
       * @param {Object} data An object containing arbitrary data to be shared with drop targets
       * @param {Event} e The event object
       * @return {Boolean} isValid True if the drag event is valid, else false to cancel
       */
      onBeforeDrag : function(data, e){
          return true;
      },
  
      /**
       * An empty function by default, but provided so that you can perform a custom action once the initial
       * drag event has begun.  The drag cannot be canceled from this function.
       * @param {Number} x The x position of the click on the dragged object
       * @param {Number} y The y position of the click on the dragged object
       */
      onStartDrag : Ext.emptyFn,
  
      // private override
      startDrag : function(x, y){
          this.proxy.reset();
          this.dragging = true;
          this.proxy.update("");
          this.onInitDrag(x, y);
          this.proxy.show();
      },
  
      // private
      onInitDrag : function(x, y){
          var clone = this.el.dom.cloneNode(true);
          clone.id = Ext.id(); // prevent duplicate ids
          this.proxy.update(clone);
          this.onStartDrag(x, y);
          return true;
      },
  
      /**
       * Returns the drag source's underlying {@link Ext.dd.StatusProxy}
       * @return {Ext.dd.StatusProxy} proxy The StatusProxy
       */
      getProxy : function(){
          return this.proxy;  
      },
  
      /**
       * Hides the drag source's {@link Ext.dd.StatusProxy}
       */
      hideProxy : function(){
          this.proxy.hide();  
          this.proxy.reset(true);
          this.dragging = false;
      },
  
      // private
      triggerCacheRefresh : function(){
          Ext.dd.DDM.refreshCache(this.groups);
      },
  
      // private - override to prevent hiding
      b4EndDrag: function(e) {
      },
  
      // private - override to prevent moving
      endDrag : function(e){
          this.onEndDrag(this.dragData, e);
      },
  
      // private
      onEndDrag : function(data, e){
      },
      
      // private - pin to cursor
      autoOffset : function(x, y) {
          this.setDelta(-12, -20);
      },
      
      destroy: function(){
          Ext.dd.DragSource.superclass.destroy.call(this);
          Ext.destroy(this.proxy);
      }
  });/**
   * @class Ext.dd.DropTarget
   * @extends Ext.dd.DDTarget
   * A simple class that provides the basic implementation needed to make any element a drop target that can have
   * draggable items dropped onto it.  The drop has no effect until an implementation of notifyDrop is provided.
   * @constructor
   * @param {Mixed} el The container element
   * @param {Object} config
   */
  Ext.dd.DropTarget = function(el, config){
      this.el = Ext.get(el);
      
      Ext.apply(this, config);
      
      if(this.containerScroll){
          Ext.dd.ScrollManager.register(this.el);
      }
      
      Ext.dd.DropTarget.superclass.constructor.call(this, this.el.dom, this.ddGroup || this.group, 
            {isTarget: true});
  
  };
  
  Ext.extend(Ext.dd.DropTarget, Ext.dd.DDTarget, {
      /**
       * @cfg {String} ddGroup
       * A named drag drop group to which this object belongs.  If a group is specified, then this object will only
       * interact with other drag drop objects in the same group (defaults to undefined).
       */
      /**
       * @cfg {String} overClass
       * The CSS class applied to the drop target element while the drag source is over it (defaults to "").
       */
      /**
       * @cfg {String} dropAllowed
       * The CSS class returned to the drag source when drop is allowed (defaults to "x-dd-drop-ok").
       */
      dropAllowed : "x-dd-drop-ok",
      /**
       * @cfg {String} dropNotAllowed
       * The CSS class returned to the drag source when drop is not allowed (defaults to "x-dd-drop-nodrop").
       */
      dropNotAllowed : "x-dd-drop-nodrop",
  
      // private
      isTarget : true,
  
      // private
      isNotifyTarget : true,
  
      /**
       * The function a {@link Ext.dd.DragSource} calls once to notify this drop target that the source is now over the
       * target.  This default implementation adds the CSS class specified by overClass (if any) to the drop element
       * and returns the dropAllowed config value.  This method should be overridden if drop validation is required.
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       * @return {String} status The CSS class that communicates the drop status back to the source so that the
       * underlying {@link Ext.dd.StatusProxy} can be updated
       */
      notifyEnter : function(dd, e, data){
          if(this.overClass){
              this.el.addClass(this.overClass);
          }
          return this.dropAllowed;
      },
  
      /**
       * The function a {@link Ext.dd.DragSource} calls continuously while it is being dragged over the target.
       * This method will be called on every mouse movement while the drag source is over the drop target.
       * This default implementation simply returns the dropAllowed config value.
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       * @return {String} status The CSS class that communicates the drop status back to the source so that the
       * underlying {@link Ext.dd.StatusProxy} can be updated
       */
      notifyOver : function(dd, e, data){
          return this.dropAllowed;
      },
  
      /**
       * The function a {@link Ext.dd.DragSource} calls once to notify this drop target that the source has been dragged
       * out of the target without dropping.  This default implementation simply removes the CSS class specified by
       * overClass (if any) from the drop element.
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       */
      notifyOut : function(dd, e, data){
          if(this.overClass){
              this.el.removeClass(this.overClass);
          }
      },
  
      /**
       * The function a {@link Ext.dd.DragSource} calls once to notify this drop target that the dragged item has
       * been dropped on it.  This method has no default implementation and returns false, so you must provide an
       * implementation that does something to process the drop event and returns true so that the drag source's
       * repair action does not run.
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       * @return {Boolean} True if the drop was valid, else false
       */
      notifyDrop : function(dd, e, data){
          return false;
      }
  });/**
   * @class Ext.dd.DragZone
   * @extends Ext.dd.DragSource
   * <p>This class provides a container DD instance that allows dragging of multiple child source nodes.</p>
   * <p>This class does not move the drag target nodes, but a proxy element which may contain
   * any DOM structure you wish. The DOM element to show in the proxy is provided by either a
   * provided implementation of {@link #getDragData}, or by registered draggables registered with {@link Ext.dd.Registry}</p>
   * <p>If you wish to provide draggability for an arbitrary number of DOM nodes, each of which represent some
   * application object (For example nodes in a {@link Ext.DataView DataView}) then use of this class
   * is the most efficient way to "activate" those nodes.</p>
   * <p>By default, this class requires that draggable child nodes are registered with {@link Ext.dd.Registry}.
   * However a simpler way to allow a DragZone to manage any number of draggable elements is to configure
   * the DragZone with  an implementation of the {@link #getDragData} method which interrogates the passed
   * mouse event to see if it has taken place within an element, or class of elements. This is easily done
   * by using the event's {@link Ext.EventObject#getTarget getTarget} method to identify a node based on a
   * {@link Ext.DomQuery} selector. For example, to make the nodes of a DataView draggable, use the following
   * technique. Knowledge of the use of the DataView is required:</p><pre><code>
  myDataView.on('render', function(v) {
      myDataView.dragZone = new Ext.dd.DragZone(v.getEl(), {
  
  //      On receipt of a mousedown event, see if it is within a DataView node.
  //      Return a drag data object if so.
          getDragData: function(e) {
  
  //          Use the DataView's own itemSelector (a mandatory property) to
  //          test if the mousedown is within one of the DataView's nodes.
              var sourceEl = e.getTarget(v.itemSelector, 10);
  
  //          If the mousedown is within a DataView node, clone the node to produce
  //          a ddel element for use by the drag proxy. Also add application data
  //          to the returned data object.
              if (sourceEl) {
                  d = sourceEl.cloneNode(true);
                  d.id = Ext.id();
                  return {
                      ddel: d,
                      sourceEl: sourceEl,
                      repairXY: Ext.fly(sourceEl).getXY(),
                      sourceStore: v.store,
                      draggedRecord: v.{@link Ext.DataView#getRecord getRecord}(sourceEl)
                  }
              }
          },
  
  //      Provide coordinates for the proxy to slide back to on failed drag.
  //      This is the original XY coordinates of the draggable element captured
  //      in the getDragData method.
          getRepairXY: function() {
              return this.dragData.repairXY;
          }
      });
  });</code></pre>
   * See the {@link Ext.dd.DropZone DropZone} documentation for details about building a DropZone which
   * cooperates with this DragZone.
   * @constructor
   * @param {Mixed} el The container element
   * @param {Object} config
   */
  Ext.dd.DragZone = function(el, config){
      Ext.dd.DragZone.superclass.constructor.call(this, el, config);
      if(this.containerScroll){
          Ext.dd.ScrollManager.register(this.el);
      }
  };
  
  Ext.extend(Ext.dd.DragZone, Ext.dd.DragSource, {
      /**
       * This property contains the data representing the dragged object. This data is set up by the implementation
       * of the {@link #getDragData} method. It must contain a <tt>ddel</tt> property, but can contain
       * any other data according to the application's needs.
       * @type Object
       * @property dragData
       */
      /**
       * @cfg {Boolean} containerScroll True to register this container with the Scrollmanager
       * for auto scrolling during drag operations.
       */
      /**
       * @cfg {String} hlColor The color to use when visually highlighting the drag source in the afterRepair
       * method after a failed drop (defaults to "c3daf9" - light blue)
       */
  
      /**
       * Called when a mousedown occurs in this container. Looks in {@link Ext.dd.Registry}
       * for a valid target to drag based on the mouse down. Override this method
       * to provide your own lookup logic (e.g. finding a child by class name). Make sure your returned
       * object has a "ddel" attribute (with an HTML Element) for other functions to work.
       * @param {EventObject} e The mouse down event
       * @return {Object} The dragData
       */
      getDragData : function(e){
          return Ext.dd.Registry.getHandleFromEvent(e);
      },
      
      /**
       * Called once drag threshold has been reached to initialize the proxy element. By default, it clones the
       * this.dragData.ddel
       * @param {Number} x The x position of the click on the dragged object
       * @param {Number} y The y position of the click on the dragged object
       * @return {Boolean} true to continue the drag, false to cancel
       */
      onInitDrag : function(x, y){
          this.proxy.update(this.dragData.ddel.cloneNode(true));
          this.onStartDrag(x, y);
          return true;
      },
      
      /**
       * Called after a repair of an invalid drop. By default, highlights this.dragData.ddel 
       */
      afterRepair : function(){
          if(Ext.enableFx){
              Ext.Element.fly(this.dragData.ddel).highlight(this.hlColor || "c3daf9");
          }
          this.dragging = false;
      },
  
      /**
       * Called before a repair of an invalid drop to get the XY to animate to. By default returns
       * the XY of this.dragData.ddel
       * @param {EventObject} e The mouse up event
       * @return {Array} The xy location (e.g. [100, 200])
       */
      getRepairXY : function(e){
          return Ext.Element.fly(this.dragData.ddel).getXY();  
      }
  });/**
   * @class Ext.dd.DropZone
   * @extends Ext.dd.DropTarget
   * <p>This class provides a container DD instance that allows dropping on multiple child target nodes.</p>
   * <p>By default, this class requires that child nodes accepting drop are registered with {@link Ext.dd.Registry}.
   * However a simpler way to allow a DropZone to manage any number of target elements is to configure the
   * DropZone with an implementation of {@link #getTargetFromEvent} which interrogates the passed
   * mouse event to see if it has taken place within an element, or class of elements. This is easily done
   * by using the event's {@link Ext.EventObject#getTarget getTarget} method to identify a node based on a
   * {@link Ext.DomQuery} selector.</p>
   * <p>Once the DropZone has detected through calling getTargetFromEvent, that the mouse is over
   * a drop target, that target is passed as the first parameter to {@link #onNodeEnter}, {@link #onNodeOver},
   * {@link #onNodeOut}, {@link #onNodeDrop}. You may configure the instance of DropZone with implementations
   * of these methods to provide application-specific behaviour for these events to update both
   * application state, and UI state.</p>
   * <p>For example to make a GridPanel a cooperating target with the example illustrated in
   * {@link Ext.dd.DragZone DragZone}, the following technique might be used:</p><pre><code>
  myGridPanel.on('render', function() {
      myGridPanel.dropZone = new Ext.dd.DropZone(myGridPanel.getView().scroller, {
  
  //      If the mouse is over a grid row, return that node. This is
  //      provided as the "target" parameter in all "onNodeXXXX" node event handling functions
          getTargetFromEvent: function(e) {
              return e.getTarget(myGridPanel.getView().rowSelector);
          },
  
  //      On entry into a target node, highlight that node.
          onNodeEnter : function(target, dd, e, data){ 
              Ext.fly(target).addClass('my-row-highlight-class');
          },
  
  //      On exit from a target node, unhighlight that node.
          onNodeOut : function(target, dd, e, data){ 
              Ext.fly(target).removeClass('my-row-highlight-class');
          },
  
  //      While over a target node, return the default drop allowed class which
  //      places a "tick" icon into the drag proxy.
          onNodeOver : function(target, dd, e, data){ 
              return Ext.dd.DropZone.prototype.dropAllowed;
          },
  
  //      On node drop we can interrogate the target to find the underlying
  //      application object that is the real target of the dragged data.
  //      In this case, it is a Record in the GridPanel's Store.
  //      We can use the data set up by the DragZone's getDragData method to read
  //      any data we decided to attach in the DragZone's getDragData method.
          onNodeDrop : function(target, dd, e, data){
              var rowIndex = myGridPanel.getView().findRowIndex(target);
              var r = myGridPanel.getStore().getAt(rowIndex);
              Ext.Msg.alert('Drop gesture', 'Dropped Record id ' + data.draggedRecord.id +
                  ' on Record id ' + r.id);
              return true;
          }
      });
  }
  </code></pre>
   * See the {@link Ext.dd.DragZone DragZone} documentation for details about building a DragZone which
   * cooperates with this DropZone.
   * @constructor
   * @param {Mixed} el The container element
   * @param {Object} config
   */
  Ext.dd.DropZone = function(el, config){
      Ext.dd.DropZone.superclass.constructor.call(this, el, config);
  };
  
  Ext.extend(Ext.dd.DropZone, Ext.dd.DropTarget, {
      /**
       * Returns a custom data object associated with the DOM node that is the target of the event.  By default
       * this looks up the event target in the {@link Ext.dd.Registry}, although you can override this method to
       * provide your own custom lookup.
       * @param {Event} e The event
       * @return {Object} data The custom data
       */
      getTargetFromEvent : function(e){
          return Ext.dd.Registry.getTargetFromEvent(e);
      },
  
      /**
       * Called when the DropZone determines that a {@link Ext.dd.DragSource} has entered a drop node
       * that has either been registered or detected by a configured implementation of {@link #getTargetFromEvent}.
       * This method has no default implementation and should be overridden to provide
       * node-specific processing if necessary.
       * @param {Object} nodeData The custom data associated with the drop node (this is the same value returned from 
       * {@link #getTargetFromEvent} for this node)
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       */
      onNodeEnter : function(n, dd, e, data){
          
      },
  
      /**
       * Called while the DropZone determines that a {@link Ext.dd.DragSource} is over a drop node
       * that has either been registered or detected by a configured implementation of {@link #getTargetFromEvent}.
       * The default implementation returns this.dropNotAllowed, so it should be
       * overridden to provide the proper feedback.
       * @param {Object} nodeData The custom data associated with the drop node (this is the same value returned from
       * {@link #getTargetFromEvent} for this node)
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       * @return {String} status The CSS class that communicates the drop status back to the source so that the
       * underlying {@link Ext.dd.StatusProxy} can be updated
       */
      onNodeOver : function(n, dd, e, data){
          return this.dropAllowed;
      },
  
      /**
       * Called when the DropZone determines that a {@link Ext.dd.DragSource} has been dragged out of
       * the drop node without dropping.  This method has no default implementation and should be overridden to provide
       * node-specific processing if necessary.
       * @param {Object} nodeData The custom data associated with the drop node (this is the same value returned from
       * {@link #getTargetFromEvent} for this node)
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       */
      onNodeOut : function(n, dd, e, data){
          
      },
  
      /**
       * Called when the DropZone determines that a {@link Ext.dd.DragSource} has been dropped onto
       * the drop node.  The default implementation returns false, so it should be overridden to provide the
       * appropriate processing of the drop event and return true so that the drag source's repair action does not run.
       * @param {Object} nodeData The custom data associated with the drop node (this is the same value returned from
       * {@link #getTargetFromEvent} for this node)
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       * @return {Boolean} True if the drop was valid, else false
       */
      onNodeDrop : function(n, dd, e, data){
          return false;
      },
  
      /**
       * Called while the DropZone determines that a {@link Ext.dd.DragSource} is being dragged over it,
       * but not over any of its registered drop nodes.  The default implementation returns this.dropNotAllowed, so
       * it should be overridden to provide the proper feedback if necessary.
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       * @return {String} status The CSS class that communicates the drop status back to the source so that the
       * underlying {@link Ext.dd.StatusProxy} can be updated
       */
      onContainerOver : function(dd, e, data){
          return this.dropNotAllowed;
      },
  
      /**
       * Called when the DropZone determines that a {@link Ext.dd.DragSource} has been dropped on it,
       * but not on any of its registered drop nodes.  The default implementation returns false, so it should be
       * overridden to provide the appropriate processing of the drop event if you need the drop zone itself to
       * be able to accept drops.  It should return true when valid so that the drag source's repair action does not run.
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       * @return {Boolean} True if the drop was valid, else false
       */
      onContainerDrop : function(dd, e, data){
          return false;
      },
  
      /**
       * The function a {@link Ext.dd.DragSource} calls once to notify this drop zone that the source is now over
       * the zone.  The default implementation returns this.dropNotAllowed and expects that only registered drop
       * nodes can process drag drop operations, so if you need the drop zone itself to be able to process drops
       * you should override this method and provide a custom implementation.
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       * @return {String} status The CSS class that communicates the drop status back to the source so that the
       * underlying {@link Ext.dd.StatusProxy} can be updated
       */
      notifyEnter : function(dd, e, data){
          return this.dropNotAllowed;
      },
  
      /**
       * The function a {@link Ext.dd.DragSource} calls continuously while it is being dragged over the drop zone.
       * This method will be called on every mouse movement while the drag source is over the drop zone.
       * It will call {@link #onNodeOver} while the drag source is over a registered node, and will also automatically
       * delegate to the appropriate node-specific methods as necessary when the drag source enters and exits
       * registered nodes ({@link #onNodeEnter}, {@link #onNodeOut}). If the drag source is not currently over a
       * registered node, it will call {@link #onContainerOver}.
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       * @return {String} status The CSS class that communicates the drop status back to the source so that the
       * underlying {@link Ext.dd.StatusProxy} can be updated
       */
      notifyOver : function(dd, e, data){
          var n = this.getTargetFromEvent(e);
          if(!n){ // not over valid drop target
              if(this.lastOverNode){
                  this.onNodeOut(this.lastOverNode, dd, e, data);
                  this.lastOverNode = null;
              }
              return this.onContainerOver(dd, e, data);
          }
          if(this.lastOverNode != n){
              if(this.lastOverNode){
                  this.onNodeOut(this.lastOverNode, dd, e, data);
              }
              this.onNodeEnter(n, dd, e, data);
              this.lastOverNode = n;
          }
          return this.onNodeOver(n, dd, e, data);
      },
  
      /**
       * The function a {@link Ext.dd.DragSource} calls once to notify this drop zone that the source has been dragged
       * out of the zone without dropping.  If the drag source is currently over a registered node, the notification
       * will be delegated to {@link #onNodeOut} for node-specific handling, otherwise it will be ignored.
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag zone
       */
      notifyOut : function(dd, e, data){
          if(this.lastOverNode){
              this.onNodeOut(this.lastOverNode, dd, e, data);
              this.lastOverNode = null;
          }
      },
  
      /**
       * The function a {@link Ext.dd.DragSource} calls once to notify this drop zone that the dragged item has
       * been dropped on it.  The drag zone will look up the target node based on the event passed in, and if there
       * is a node registered for that event, it will delegate to {@link #onNodeDrop} for node-specific handling,
       * otherwise it will call {@link #onContainerDrop}.
       * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
       * @param {Event} e The event
       * @param {Object} data An object containing arbitrary data supplied by the drag source
       * @return {Boolean} True if the drop was valid, else false
       */
      notifyDrop : function(dd, e, data){
          if(this.lastOverNode){
              this.onNodeOut(this.lastOverNode, dd, e, data);
              this.lastOverNode = null;
          }
          var n = this.getTargetFromEvent(e);
          return n ?
              this.onNodeDrop(n, dd, e, data) :
              this.onContainerDrop(dd, e, data);
      },
  
      // private
      triggerCacheRefresh : function(){
          Ext.dd.DDM.refreshCache(this.groups);
      }  
  });/**
   * @class Ext.Element
   */
  Ext.Element.addMethods({
      /**
       * Initializes a {@link Ext.dd.DD} drag drop object for this element.
       * @param {String} group The group the DD object is member of
       * @param {Object} config The DD config object
       * @param {Object} overrides An object containing methods to override/implement on the DD object
       * @return {Ext.dd.DD} The DD object
       */
      initDD : function(group, config, overrides){
          var dd = new Ext.dd.DD(Ext.id(this.dom), group, config);
          return Ext.apply(dd, overrides);
      },
  
      /**
       * Initializes a {@link Ext.dd.DDProxy} object for this element.
       * @param {String} group The group the DDProxy object is member of
       * @param {Object} config The DDProxy config object
       * @param {Object} overrides An object containing methods to override/implement on the DDProxy object
       * @return {Ext.dd.DDProxy} The DDProxy object
       */
      initDDProxy : function(group, config, overrides){
          var dd = new Ext.dd.DDProxy(Ext.id(this.dom), group, config);
          return Ext.apply(dd, overrides);
      },
  
      /**
       * Initializes a {@link Ext.dd.DDTarget} object for this element.
       * @param {String} group The group the DDTarget object is member of
       * @param {Object} config The DDTarget config object
       * @param {Object} overrides An object containing methods to override/implement on the DDTarget object
       * @return {Ext.dd.DDTarget} The DDTarget object
       */
      initDDTarget : function(group, config, overrides){
          var dd = new Ext.dd.DDTarget(Ext.id(this.dom), group, config);
          return Ext.apply(dd, overrides);
      }
  });