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1/*!
2 * Ext JS Library 3.4.0
3 * Copyright(c) 2006-2011 Sencha Inc.
4 * licensing@sencha.com
5 * http://www.sencha.com/license
6 */
7/*
8 * These classes are derivatives of the similarly named classes in the YUI Library.
9 * The original license:
10 * Copyright (c) 2006, Yahoo! Inc. All rights reserved.
11 * Code licensed under the BSD License:
12 * http://developer.yahoo.net/yui/license.txt
13 */
14
15(function() {
16
17var Event=Ext.EventManager;
18var Dom=Ext.lib.Dom;
19
20/**
21 * @class Ext.dd.DragDrop
22 * Defines the interface and base operation of items that that can be
23 * dragged or can be drop targets.  It was designed to be extended, overriding
24 * the event handlers for startDrag, onDrag, onDragOver and onDragOut.
25 * Up to three html elements can be associated with a DragDrop instance:
26 * <ul>
27 * <li>linked element: the element that is passed into the constructor.
28 * This is the element which defines the boundaries for interaction with
29 * other DragDrop objects.</li>
30 * <li>handle element(s): The drag operation only occurs if the element that
31 * was clicked matches a handle element.  By default this is the linked
32 * element, but there are times that you will want only a portion of the
33 * linked element to initiate the drag operation, and the setHandleElId()
34 * method provides a way to define this.</li>
35 * <li>drag element: this represents the element that would be moved along
36 * with the cursor during a drag operation.  By default, this is the linked
37 * element itself as in {@link Ext.dd.DD}.  setDragElId() lets you define
38 * a separate element that would be moved, as in {@link Ext.dd.DDProxy}.
39 * </li>
40 * </ul>
41 * This class should not be instantiated until the onload event to ensure that
42 * the associated elements are available.
43 * The following would define a DragDrop obj that would interact with any
44 * other DragDrop obj in the "group1" group:
45 * <pre>
46 *  dd = new Ext.dd.DragDrop("div1", "group1");
47 * </pre>
48 * Since none of the event handlers have been implemented, nothing would
49 * actually happen if you were to run the code above.  Normally you would
50 * override this class or one of the default implementations, but you can
51 * also override the methods you want on an instance of the class...
52 * <pre>
53 *  dd.onDragDrop = function(e, id) {
54 *  &nbsp;&nbsp;alert("dd was dropped on " + id);
55 *  }
56 * </pre>
57 * @constructor
58 * @param {String} id of the element that is linked to this instance
59 * @param {String} sGroup the group of related DragDrop objects
60 * @param {object} config an object containing configurable attributes
61 *                Valid properties for DragDrop:
62 *                    padding, isTarget, maintainOffset, primaryButtonOnly
63 */
64Ext.dd.DragDrop = function(id, sGroup, config) {
65    if(id) {
66        this.init(id, sGroup, config);
67    }
68};
69
70Ext.dd.DragDrop.prototype = {
71
72    /**
73     * Set to false to enable a DragDrop object to fire drag events while dragging
74     * over its own Element. Defaults to true - DragDrop objects do not by default
75     * fire drag events to themselves.
76     * @property ignoreSelf
77     * @type Boolean
78     */
79
80    /**
81     * The id of the element associated with this object.  This is what we
82     * refer to as the "linked element" because the size and position of
83     * this element is used to determine when the drag and drop objects have
84     * interacted.
85     * @property id
86     * @type String
87     */
88    id: null,
89
90    /**
91     * Configuration attributes passed into the constructor
92     * @property config
93     * @type object
94     */
95    config: null,
96
97    /**
98     * The id of the element that will be dragged.  By default this is same
99     * as the linked element, but could be changed to another element. Ex:
100     * Ext.dd.DDProxy
101     * @property dragElId
102     * @type String
103     * @private
104     */
105    dragElId: null,
106
107    /**
108     * The ID of the element that initiates the drag operation.  By default
109     * this is the linked element, but could be changed to be a child of this
110     * element.  This lets us do things like only starting the drag when the
111     * header element within the linked html element is clicked.
112     * @property handleElId
113     * @type String
114     * @private
115     */
116    handleElId: null,
117
118    /**
119     * An object who's property names identify HTML tags to be considered invalid as drag handles.
120     * A non-null property value identifies the tag as invalid. Defaults to the
121     * following value which prevents drag operations from being initiated by &lt;a> elements:<pre><code>
122{
123    A: "A"
124}</code></pre>
125     * @property invalidHandleTypes
126     * @type Object
127     */
128    invalidHandleTypes: null,
129
130    /**
131     * An object who's property names identify the IDs of elements to be considered invalid as drag handles.
132     * A non-null property value identifies the ID as invalid. For example, to prevent
133     * dragging from being initiated on element ID "foo", use:<pre><code>
134{
135    foo: true
136}</code></pre>
137     * @property invalidHandleIds
138     * @type Object
139     */
140    invalidHandleIds: null,
141
142    /**
143     * An Array of CSS class names for elements to be considered in valid as drag handles.
144     * @property invalidHandleClasses
145     * @type Array
146     */
147    invalidHandleClasses: null,
148
149    /**
150     * The linked element's absolute X position at the time the drag was
151     * started
152     * @property startPageX
153     * @type int
154     * @private
155     */
156    startPageX: 0,
157
158    /**
159     * The linked element's absolute X position at the time the drag was
160     * started
161     * @property startPageY
162     * @type int
163     * @private
164     */
165    startPageY: 0,
166
167    /**
168     * The group defines a logical collection of DragDrop objects that are
169     * related.  Instances only get events when interacting with other
170     * DragDrop object in the same group.  This lets us define multiple
171     * groups using a single DragDrop subclass if we want.
172     * @property groups
173     * @type object An object in the format {'group1':true, 'group2':true}
174     */
175    groups: null,
176
177    /**
178     * Individual drag/drop instances can be locked.  This will prevent
179     * onmousedown start drag.
180     * @property locked
181     * @type boolean
182     * @private
183     */
184    locked: false,
185
186    /**
187     * Lock this instance
188     * @method lock
189     */
190    lock: function() {
191        this.locked = true;
192    },
193
194    /**
195     * When set to true, other DD objects in cooperating DDGroups do not receive
196     * notification events when this DD object is dragged over them. Defaults to false.
197     * @property moveOnly
198     * @type boolean
199     */
200    moveOnly: false,
201
202    /**
203     * Unlock this instace
204     * @method unlock
205     */
206    unlock: function() {
207        this.locked = false;
208    },
209
210    /**
211     * By default, all instances can be a drop target.  This can be disabled by
212     * setting isTarget to false.
213     * @property isTarget
214     * @type boolean
215     */
216    isTarget: true,
217
218    /**
219     * The padding configured for this drag and drop object for calculating
220     * the drop zone intersection with this object.
221     * @property padding
222     * @type int[] An array containing the 4 padding values: [top, right, bottom, left]
223     */
224    padding: null,
225
226    /**
227     * Cached reference to the linked element
228     * @property _domRef
229     * @private
230     */
231    _domRef: null,
232
233    /**
234     * Internal typeof flag
235     * @property __ygDragDrop
236     * @private
237     */
238    __ygDragDrop: true,
239
240    /**
241     * Set to true when horizontal contraints are applied
242     * @property constrainX
243     * @type boolean
244     * @private
245     */
246    constrainX: false,
247
248    /**
249     * Set to true when vertical contraints are applied
250     * @property constrainY
251     * @type boolean
252     * @private
253     */
254    constrainY: false,
255
256    /**
257     * The left constraint
258     * @property minX
259     * @type int
260     * @private
261     */
262    minX: 0,
263
264    /**
265     * The right constraint
266     * @property maxX
267     * @type int
268     * @private
269     */
270    maxX: 0,
271
272    /**
273     * The up constraint
274     * @property minY
275     * @type int
276     * @private
277     */
278    minY: 0,
279
280    /**
281     * The down constraint
282     * @property maxY
283     * @type int
284     * @private
285     */
286    maxY: 0,
287
288    /**
289     * Maintain offsets when we resetconstraints.  Set to true when you want
290     * the position of the element relative to its parent to stay the same
291     * when the page changes
292     *
293     * @property maintainOffset
294     * @type boolean
295     */
296    maintainOffset: false,
297
298    /**
299     * Array of pixel locations the element will snap to if we specified a
300     * horizontal graduation/interval.  This array is generated automatically
301     * when you define a tick interval.
302     * @property xTicks
303     * @type int[]
304     */
305    xTicks: null,
306
307    /**
308     * Array of pixel locations the element will snap to if we specified a
309     * vertical graduation/interval.  This array is generated automatically
310     * when you define a tick interval.
311     * @property yTicks
312     * @type int[]
313     */
314    yTicks: null,
315
316    /**
317     * By default the drag and drop instance will only respond to the primary
318     * button click (left button for a right-handed mouse).  Set to true to
319     * allow drag and drop to start with any mouse click that is propogated
320     * by the browser
321     * @property primaryButtonOnly
322     * @type boolean
323     */
324    primaryButtonOnly: true,
325
326    /**
327     * The available property is false until the linked dom element is accessible.
328     * @property available
329     * @type boolean
330     */
331    available: false,
332
333    /**
334     * By default, drags can only be initiated if the mousedown occurs in the
335     * region the linked element is.  This is done in part to work around a
336     * bug in some browsers that mis-report the mousedown if the previous
337     * mouseup happened outside of the window.  This property is set to true
338     * if outer handles are defined.
339     *
340     * @property hasOuterHandles
341     * @type boolean
342     * @default false
343     */
344    hasOuterHandles: false,
345
346    /**
347     * Code that executes immediately before the startDrag event
348     * @method b4StartDrag
349     * @private
350     */
351    b4StartDrag: function(x, y) { },
352
353    /**
354     * Abstract method called after a drag/drop object is clicked
355     * and the drag or mousedown time thresholds have beeen met.
356     * @method startDrag
357     * @param {int} X click location
358     * @param {int} Y click location
359     */
360    startDrag: function(x, y) { /* override this */ },
361
362    /**
363     * Code that executes immediately before the onDrag event
364     * @method b4Drag
365     * @private
366     */
367    b4Drag: function(e) { },
368
369    /**
370     * Abstract method called during the onMouseMove event while dragging an
371     * object.
372     * @method onDrag
373     * @param {Event} e the mousemove event
374     */
375    onDrag: function(e) { /* override this */ },
376
377    /**
378     * Abstract method called when this element fist begins hovering over
379     * another DragDrop obj
380     * @method onDragEnter
381     * @param {Event} e the mousemove event
382     * @param {String|DragDrop[]} id In POINT mode, the element
383     * id this is hovering over.  In INTERSECT mode, an array of one or more
384     * dragdrop items being hovered over.
385     */
386    onDragEnter: function(e, id) { /* override this */ },
387
388    /**
389     * Code that executes immediately before the onDragOver event
390     * @method b4DragOver
391     * @private
392     */
393    b4DragOver: function(e) { },
394
395    /**
396     * Abstract method called when this element is hovering over another
397     * DragDrop obj
398     * @method onDragOver
399     * @param {Event} e the mousemove event
400     * @param {String|DragDrop[]} id In POINT mode, the element
401     * id this is hovering over.  In INTERSECT mode, an array of dd items
402     * being hovered over.
403     */
404    onDragOver: function(e, id) { /* override this */ },
405
406    /**
407     * Code that executes immediately before the onDragOut event
408     * @method b4DragOut
409     * @private
410     */
411    b4DragOut: function(e) { },
412
413    /**
414     * Abstract method called when we are no longer hovering over an element
415     * @method onDragOut
416     * @param {Event} e the mousemove event
417     * @param {String|DragDrop[]} id In POINT mode, the element
418     * id this was hovering over.  In INTERSECT mode, an array of dd items
419     * that the mouse is no longer over.
420     */
421    onDragOut: function(e, id) { /* override this */ },
422
423    /**
424     * Code that executes immediately before the onDragDrop event
425     * @method b4DragDrop
426     * @private
427     */
428    b4DragDrop: function(e) { },
429
430    /**
431     * Abstract method called when this item is dropped on another DragDrop
432     * obj
433     * @method onDragDrop
434     * @param {Event} e the mouseup event
435     * @param {String|DragDrop[]} id In POINT mode, the element
436     * id this was dropped on.  In INTERSECT mode, an array of dd items this
437     * was dropped on.
438     */
439    onDragDrop: function(e, id) { /* override this */ },
440
441    /**
442     * Abstract method called when this item is dropped on an area with no
443     * drop target
444     * @method onInvalidDrop
445     * @param {Event} e the mouseup event
446     */
447    onInvalidDrop: function(e) { /* override this */ },
448
449    /**
450     * Code that executes immediately before the endDrag event
451     * @method b4EndDrag
452     * @private
453     */
454    b4EndDrag: function(e) { },
455
456    /**
457     * Fired when we are done dragging the object
458     * @method endDrag
459     * @param {Event} e the mouseup event
460     */
461    endDrag: function(e) { /* override this */ },
462
463    /**
464     * Code executed immediately before the onMouseDown event
465     * @method b4MouseDown
466     * @param {Event} e the mousedown event
467     * @private
468     */
469    b4MouseDown: function(e) {  },
470
471    /**
472     * Event handler that fires when a drag/drop obj gets a mousedown
473     * @method onMouseDown
474     * @param {Event} e the mousedown event
475     */
476    onMouseDown: function(e) { /* override this */ },
477
478    /**
479     * Event handler that fires when a drag/drop obj gets a mouseup
480     * @method onMouseUp
481     * @param {Event} e the mouseup event
482     */
483    onMouseUp: function(e) { /* override this */ },
484
485    /**
486     * Override the onAvailable method to do what is needed after the initial
487     * position was determined.
488     * @method onAvailable
489     */
490    onAvailable: function () {
491    },
492
493    /**
494     * Provides default constraint padding to "constrainTo" elements (defaults to {left: 0, right:0, top:0, bottom:0}).
495     * @type Object
496     */
497    defaultPadding : {left:0, right:0, top:0, bottom:0},
498
499    /**
500     * Initializes the drag drop object's constraints to restrict movement to a certain element.
501 *
502 * Usage:
503 <pre><code>
504 var dd = new Ext.dd.DDProxy("dragDiv1", "proxytest",
505                { dragElId: "existingProxyDiv" });
506 dd.startDrag = function(){
507     this.constrainTo("parent-id");
508 };
509 </code></pre>
510 * Or you can initalize it using the {@link Ext.Element} object:
511 <pre><code>
512 Ext.get("dragDiv1").initDDProxy("proxytest", {dragElId: "existingProxyDiv"}, {
513     startDrag : function(){
514         this.constrainTo("parent-id");
515     }
516 });
517 </code></pre>
518     * @param {Mixed} constrainTo The element to constrain to.
519     * @param {Object/Number} pad (optional) Pad provides a way to specify "padding" of the constraints,
520     * and can be either a number for symmetrical padding (4 would be equal to {left:4, right:4, top:4, bottom:4}) or
521     * an object containing the sides to pad. For example: {right:10, bottom:10}
522     * @param {Boolean} inContent (optional) Constrain the draggable in the content box of the element (inside padding and borders)
523     */
524    constrainTo : function(constrainTo, pad, inContent){
525        if(Ext.isNumber(pad)){
526            pad = {left: pad, right:pad, top:pad, bottom:pad};
527        }
528        pad = pad || this.defaultPadding;
529        var b = Ext.get(this.getEl()).getBox(),
530            ce = Ext.get(constrainTo),
531            s = ce.getScroll(),
532            c, 
533            cd = ce.dom;
534        if(cd == document.body){
535            c = { x: s.left, y: s.top, width: Ext.lib.Dom.getViewWidth(), height: Ext.lib.Dom.getViewHeight()};
536        }else{
537            var xy = ce.getXY();
538            c = {x : xy[0], y: xy[1], width: cd.clientWidth, height: cd.clientHeight};
539        }
540
541
542        var topSpace = b.y - c.y,
543            leftSpace = b.x - c.x;
544
545        this.resetConstraints();
546        this.setXConstraint(leftSpace - (pad.left||0), // left
547                c.width - leftSpace - b.width - (pad.right||0), //right
548                                this.xTickSize
549        );
550        this.setYConstraint(topSpace - (pad.top||0), //top
551                c.height - topSpace - b.height - (pad.bottom||0), //bottom
552                                this.yTickSize
553        );
554    },
555
556    /**
557     * Returns a reference to the linked element
558     * @method getEl
559     * @return {HTMLElement} the html element
560     */
561    getEl: function() {
562        if (!this._domRef) {
563            this._domRef = Ext.getDom(this.id);
564        }
565
566        return this._domRef;
567    },
568
569    /**
570     * Returns a reference to the actual element to drag.  By default this is
571     * the same as the html element, but it can be assigned to another
572     * element. An example of this can be found in Ext.dd.DDProxy
573     * @method getDragEl
574     * @return {HTMLElement} the html element
575     */
576    getDragEl: function() {
577        return Ext.getDom(this.dragElId);
578    },
579
580    /**
581     * Sets up the DragDrop object.  Must be called in the constructor of any
582     * Ext.dd.DragDrop subclass
583     * @method init
584     * @param id the id of the linked element
585     * @param {String} sGroup the group of related items
586     * @param {object} config configuration attributes
587     */
588    init: function(id, sGroup, config) {
589        this.initTarget(id, sGroup, config);
590        Event.on(this.id, "mousedown", this.handleMouseDown, this);
591        // Event.on(this.id, "selectstart", Event.preventDefault);
592    },
593
594    /**
595     * Initializes Targeting functionality only... the object does not
596     * get a mousedown handler.
597     * @method initTarget
598     * @param id the id of the linked element
599     * @param {String} sGroup the group of related items
600     * @param {object} config configuration attributes
601     */
602    initTarget: function(id, sGroup, config) {
603
604        // configuration attributes
605        this.config = config || {};
606
607        // create a local reference to the drag and drop manager
608        this.DDM = Ext.dd.DDM;
609        // initialize the groups array
610        this.groups = {};
611
612        // assume that we have an element reference instead of an id if the
613        // parameter is not a string
614        if (typeof id !== "string") {
615            id = Ext.id(id);
616        }
617
618        // set the id
619        this.id = id;
620
621        // add to an interaction group
622        this.addToGroup((sGroup) ? sGroup : "default");
623
624        // We don't want to register this as the handle with the manager
625        // so we just set the id rather than calling the setter.
626        this.handleElId = id;
627
628        // the linked element is the element that gets dragged by default
629        this.setDragElId(id);
630
631        // by default, clicked anchors will not start drag operations.
632        this.invalidHandleTypes = { A: "A" };
633        this.invalidHandleIds = {};
634        this.invalidHandleClasses = [];
635
636        this.applyConfig();
637
638        this.handleOnAvailable();
639    },
640
641    /**
642     * Applies the configuration parameters that were passed into the constructor.
643     * This is supposed to happen at each level through the inheritance chain.  So
644     * a DDProxy implentation will execute apply config on DDProxy, DD, and
645     * DragDrop in order to get all of the parameters that are available in
646     * each object.
647     * @method applyConfig
648     */
649    applyConfig: function() {
650
651        // configurable properties:
652        //    padding, isTarget, maintainOffset, primaryButtonOnly
653        this.padding           = this.config.padding || [0, 0, 0, 0];
654        this.isTarget          = (this.config.isTarget !== false);
655        this.maintainOffset    = (this.config.maintainOffset);
656        this.primaryButtonOnly = (this.config.primaryButtonOnly !== false);
657
658    },
659
660    /**
661     * Executed when the linked element is available
662     * @method handleOnAvailable
663     * @private
664     */
665    handleOnAvailable: function() {
666        this.available = true;
667        this.resetConstraints();
668        this.onAvailable();
669    },
670
671     /**
672     * Configures the padding for the target zone in px.  Effectively expands
673     * (or reduces) the virtual object size for targeting calculations.
674     * Supports css-style shorthand; if only one parameter is passed, all sides
675     * will have that padding, and if only two are passed, the top and bottom
676     * will have the first param, the left and right the second.
677     * @method setPadding
678     * @param {int} iTop    Top pad
679     * @param {int} iRight  Right pad
680     * @param {int} iBot    Bot pad
681     * @param {int} iLeft   Left pad
682     */
683    setPadding: function(iTop, iRight, iBot, iLeft) {
684        // this.padding = [iLeft, iRight, iTop, iBot];
685        if (!iRight && 0 !== iRight) {
686            this.padding = [iTop, iTop, iTop, iTop];
687        } else if (!iBot && 0 !== iBot) {
688            this.padding = [iTop, iRight, iTop, iRight];
689        } else {
690            this.padding = [iTop, iRight, iBot, iLeft];
691        }
692    },
693
694    /**
695     * Stores the initial placement of the linked element.
696     * @method setInitPosition
697     * @param {int} diffX   the X offset, default 0
698     * @param {int} diffY   the Y offset, default 0
699     */
700    setInitPosition: function(diffX, diffY) {
701        var el = this.getEl();
702
703        if (!this.DDM.verifyEl(el)) {
704            return;
705        }
706
707        var dx = diffX || 0;
708        var dy = diffY || 0;
709
710        var p = Dom.getXY( el );
711
712        this.initPageX = p[0] - dx;
713        this.initPageY = p[1] - dy;
714
715        this.lastPageX = p[0];
716        this.lastPageY = p[1];
717
718        this.setStartPosition(p);
719    },
720
721    /**
722     * Sets the start position of the element.  This is set when the obj
723     * is initialized, the reset when a drag is started.
724     * @method setStartPosition
725     * @param pos current position (from previous lookup)
726     * @private
727     */
728    setStartPosition: function(pos) {
729        var p = pos || Dom.getXY( this.getEl() );
730        this.deltaSetXY = null;
731
732        this.startPageX = p[0];
733        this.startPageY = p[1];
734    },
735
736    /**
737     * Add this instance to a group of related drag/drop objects.  All
738     * instances belong to at least one group, and can belong to as many
739     * groups as needed.
740     * @method addToGroup
741     * @param sGroup {string} the name of the group
742     */
743    addToGroup: function(sGroup) {
744        this.groups[sGroup] = true;
745        this.DDM.regDragDrop(this, sGroup);
746    },
747
748    /**
749     * Remove's this instance from the supplied interaction group
750     * @method removeFromGroup
751     * @param {string}  sGroup  The group to drop
752     */
753    removeFromGroup: function(sGroup) {
754        if (this.groups[sGroup]) {
755            delete this.groups[sGroup];
756        }
757
758        this.DDM.removeDDFromGroup(this, sGroup);
759    },
760
761    /**
762     * Allows you to specify that an element other than the linked element
763     * will be moved with the cursor during a drag
764     * @method setDragElId
765     * @param id {string} the id of the element that will be used to initiate the drag
766     */
767    setDragElId: function(id) {
768        this.dragElId = id;
769    },
770
771    /**
772     * Allows you to specify a child of the linked element that should be
773     * used to initiate the drag operation.  An example of this would be if
774     * you have a content div with text and links.  Clicking anywhere in the
775     * content area would normally start the drag operation.  Use this method
776     * to specify that an element inside of the content div is the element
777     * that starts the drag operation.
778     * @method setHandleElId
779     * @param id {string} the id of the element that will be used to
780     * initiate the drag.
781     */
782    setHandleElId: function(id) {
783        if (typeof id !== "string") {
784            id = Ext.id(id);
785        }
786        this.handleElId = id;
787        this.DDM.regHandle(this.id, id);
788    },
789
790    /**
791     * Allows you to set an element outside of the linked element as a drag
792     * handle
793     * @method setOuterHandleElId
794     * @param id the id of the element that will be used to initiate the drag
795     */
796    setOuterHandleElId: function(id) {
797        if (typeof id !== "string") {
798            id = Ext.id(id);
799        }
800        Event.on(id, "mousedown",
801                this.handleMouseDown, this);
802        this.setHandleElId(id);
803
804        this.hasOuterHandles = true;
805    },
806
807    /**
808     * Remove all drag and drop hooks for this element
809     * @method unreg
810     */
811    unreg: function() {
812        Event.un(this.id, "mousedown",
813                this.handleMouseDown);
814        this._domRef = null;
815        this.DDM._remove(this);
816    },
817
818    destroy : function(){
819        this.unreg();
820    },
821
822    /**
823     * Returns true if this instance is locked, or the drag drop mgr is locked
824     * (meaning that all drag/drop is disabled on the page.)
825     * @method isLocked
826     * @return {boolean} true if this obj or all drag/drop is locked, else
827     * false
828     */
829    isLocked: function() {
830        return (this.DDM.isLocked() || this.locked);
831    },
832
833    /**
834     * Fired when this object is clicked
835     * @method handleMouseDown
836     * @param {Event} e
837     * @param {Ext.dd.DragDrop} oDD the clicked dd object (this dd obj)
838     * @private
839     */
840    handleMouseDown: function(e, oDD){
841        if (this.primaryButtonOnly && e.button != 0) {
842            return;
843        }
844
845        if (this.isLocked()) {
846            return;
847        }
848
849        this.DDM.refreshCache(this.groups);
850
851        var pt = new Ext.lib.Point(Ext.lib.Event.getPageX(e), Ext.lib.Event.getPageY(e));
852        if (!this.hasOuterHandles && !this.DDM.isOverTarget(pt, this) )  {
853        } else {
854            if (this.clickValidator(e)) {
855
856                // set the initial element position
857                this.setStartPosition();
858
859                this.b4MouseDown(e);
860                this.onMouseDown(e);
861
862                this.DDM.handleMouseDown(e, this);
863
864                this.DDM.stopEvent(e);
865            } else {
866
867
868            }
869        }
870    },
871
872    clickValidator: function(e) {
873        var target = e.getTarget();
874        return ( this.isValidHandleChild(target) &&
875                    (this.id == this.handleElId ||
876                        this.DDM.handleWasClicked(target, this.id)) );
877    },
878
879    /**
880     * Allows you to specify a tag name that should not start a drag operation
881     * when clicked.  This is designed to facilitate embedding links within a
882     * drag handle that do something other than start the drag.
883     * @method addInvalidHandleType
884     * @param {string} tagName the type of element to exclude
885     */
886    addInvalidHandleType: function(tagName) {
887        var type = tagName.toUpperCase();
888        this.invalidHandleTypes[type] = type;
889    },
890
891    /**
892     * Lets you to specify an element id for a child of a drag handle
893     * that should not initiate a drag
894     * @method addInvalidHandleId
895     * @param {string} id the element id of the element you wish to ignore
896     */
897    addInvalidHandleId: function(id) {
898        if (typeof id !== "string") {
899            id = Ext.id(id);
900        }
901        this.invalidHandleIds[id] = id;
902    },
903
904    /**
905     * Lets you specify a css class of elements that will not initiate a drag
906     * @method addInvalidHandleClass
907     * @param {string} cssClass the class of the elements you wish to ignore
908     */
909    addInvalidHandleClass: function(cssClass) {
910        this.invalidHandleClasses.push(cssClass);
911    },
912
913    /**
914     * Unsets an excluded tag name set by addInvalidHandleType
915     * @method removeInvalidHandleType
916     * @param {string} tagName the type of element to unexclude
917     */
918    removeInvalidHandleType: function(tagName) {
919        var type = tagName.toUpperCase();
920        // this.invalidHandleTypes[type] = null;
921        delete this.invalidHandleTypes[type];
922    },
923
924    /**
925     * Unsets an invalid handle id
926     * @method removeInvalidHandleId
927     * @param {string} id the id of the element to re-enable
928     */
929    removeInvalidHandleId: function(id) {
930        if (typeof id !== "string") {
931            id = Ext.id(id);
932        }
933        delete this.invalidHandleIds[id];
934    },
935
936    /**
937     * Unsets an invalid css class
938     * @method removeInvalidHandleClass
939     * @param {string} cssClass the class of the element(s) you wish to
940     * re-enable
941     */
942    removeInvalidHandleClass: function(cssClass) {
943        for (var i=0, len=this.invalidHandleClasses.length; i<len; ++i) {
944            if (this.invalidHandleClasses[i] == cssClass) {
945                delete this.invalidHandleClasses[i];
946            }
947        }
948    },
949
950    /**
951     * Checks the tag exclusion list to see if this click should be ignored
952     * @method isValidHandleChild
953     * @param {HTMLElement} node the HTMLElement to evaluate
954     * @return {boolean} true if this is a valid tag type, false if not
955     */
956    isValidHandleChild: function(node) {
957
958        var valid = true;
959        // var n = (node.nodeName == "#text") ? node.parentNode : node;
960        var nodeName;
961        try {
962            nodeName = node.nodeName.toUpperCase();
963        } catch(e) {
964            nodeName = node.nodeName;
965        }
966        valid = valid && !this.invalidHandleTypes[nodeName];
967        valid = valid && !this.invalidHandleIds[node.id];
968
969        for (var i=0, len=this.invalidHandleClasses.length; valid && i<len; ++i) {
970            valid = !Ext.fly(node).hasClass(this.invalidHandleClasses[i]);
971        }
972
973
974        return valid;
975
976    },
977
978    /**
979     * Create the array of horizontal tick marks if an interval was specified
980     * in setXConstraint().
981     * @method setXTicks
982     * @private
983     */
984    setXTicks: function(iStartX, iTickSize) {
985        this.xTicks = [];
986        this.xTickSize = iTickSize;
987
988        var tickMap = {};
989
990        for (var i = this.initPageX; i >= this.minX; i = i - iTickSize) {
991            if (!tickMap[i]) {
992                this.xTicks[this.xTicks.length] = i;
993                tickMap[i] = true;
994            }
995        }
996
997        for (i = this.initPageX; i <= this.maxX; i = i + iTickSize) {
998            if (!tickMap[i]) {
999                this.xTicks[this.xTicks.length] = i;
1000                tickMap[i] = true;
1001            }
1002        }
1003
1004        this.xTicks.sort(this.DDM.numericSort) ;
1005    },
1006
1007    /**
1008     * Create the array of vertical tick marks if an interval was specified in
1009     * setYConstraint().
1010     * @method setYTicks
1011     * @private
1012     */
1013    setYTicks: function(iStartY, iTickSize) {
1014        this.yTicks = [];
1015        this.yTickSize = iTickSize;
1016
1017        var tickMap = {};
1018
1019        for (var i = this.initPageY; i >= this.minY; i = i - iTickSize) {
1020            if (!tickMap[i]) {
1021                this.yTicks[this.yTicks.length] = i;
1022                tickMap[i] = true;
1023            }
1024        }
1025
1026        for (i = this.initPageY; i <= this.maxY; i = i + iTickSize) {
1027            if (!tickMap[i]) {
1028                this.yTicks[this.yTicks.length] = i;
1029                tickMap[i] = true;
1030            }
1031        }
1032
1033        this.yTicks.sort(this.DDM.numericSort) ;
1034    },
1035
1036    /**
1037     * By default, the element can be dragged any place on the screen.  Use
1038     * this method to limit the horizontal travel of the element.  Pass in
1039     * 0,0 for the parameters if you want to lock the drag to the y axis.
1040     * @method setXConstraint
1041     * @param {int} iLeft the number of pixels the element can move to the left
1042     * @param {int} iRight the number of pixels the element can move to the
1043     * right
1044     * @param {int} iTickSize optional parameter for specifying that the
1045     * element
1046     * should move iTickSize pixels at a time.
1047     */
1048    setXConstraint: function(iLeft, iRight, iTickSize) {
1049        this.leftConstraint = iLeft;
1050        this.rightConstraint = iRight;
1051
1052        this.minX = this.initPageX - iLeft;
1053        this.maxX = this.initPageX + iRight;
1054        if (iTickSize) { this.setXTicks(this.initPageX, iTickSize); }
1055
1056        this.constrainX = true;
1057    },
1058
1059    /**
1060     * Clears any constraints applied to this instance.  Also clears ticks
1061     * since they can't exist independent of a constraint at this time.
1062     * @method clearConstraints
1063     */
1064    clearConstraints: function() {
1065        this.constrainX = false;
1066        this.constrainY = false;
1067        this.clearTicks();
1068    },
1069
1070    /**
1071     * Clears any tick interval defined for this instance
1072     * @method clearTicks
1073     */
1074    clearTicks: function() {
1075        this.xTicks = null;
1076        this.yTicks = null;
1077        this.xTickSize = 0;
1078        this.yTickSize = 0;
1079    },
1080
1081    /**
1082     * By default, the element can be dragged any place on the screen.  Set
1083     * this to limit the vertical travel of the element.  Pass in 0,0 for the
1084     * parameters if you want to lock the drag to the x axis.
1085     * @method setYConstraint
1086     * @param {int} iUp the number of pixels the element can move up
1087     * @param {int} iDown the number of pixels the element can move down
1088     * @param {int} iTickSize optional parameter for specifying that the
1089     * element should move iTickSize pixels at a time.
1090     */
1091    setYConstraint: function(iUp, iDown, iTickSize) {
1092        this.topConstraint = iUp;
1093        this.bottomConstraint = iDown;
1094
1095        this.minY = this.initPageY - iUp;
1096        this.maxY = this.initPageY + iDown;
1097        if (iTickSize) { this.setYTicks(this.initPageY, iTickSize); }
1098
1099        this.constrainY = true;
1100
1101    },
1102
1103    /**
1104     * resetConstraints must be called if you manually reposition a dd element.
1105     * @method resetConstraints
1106     * @param {boolean} maintainOffset
1107     */
1108    resetConstraints: function() {
1109        // Maintain offsets if necessary
1110        if (this.initPageX || this.initPageX === 0) {
1111            // figure out how much this thing has moved
1112            var dx = (this.maintainOffset) ? this.lastPageX - this.initPageX : 0;
1113            var dy = (this.maintainOffset) ? this.lastPageY - this.initPageY : 0;
1114
1115            this.setInitPosition(dx, dy);
1116
1117        // This is the first time we have detected the element's position
1118        } else {
1119            this.setInitPosition();
1120        }
1121
1122        if (this.constrainX) {
1123            this.setXConstraint( this.leftConstraint,
1124                                 this.rightConstraint,
1125                                 this.xTickSize        );
1126        }
1127
1128        if (this.constrainY) {
1129            this.setYConstraint( this.topConstraint,
1130                                 this.bottomConstraint,
1131                                 this.yTickSize         );
1132        }
1133    },
1134
1135    /**
1136     * Normally the drag element is moved pixel by pixel, but we can specify
1137     * that it move a number of pixels at a time.  This method resolves the
1138     * location when we have it set up like this.
1139     * @method getTick
1140     * @param {int} val where we want to place the object
1141     * @param {int[]} tickArray sorted array of valid points
1142     * @return {int} the closest tick
1143     * @private
1144     */
1145    getTick: function(val, tickArray) {
1146        if (!tickArray) {
1147            // If tick interval is not defined, it is effectively 1 pixel,
1148            // so we return the value passed to us.
1149            return val;
1150        } else if (tickArray[0] >= val) {
1151            // The value is lower than the first tick, so we return the first
1152            // tick.
1153            return tickArray[0];
1154        } else {
1155            for (var i=0, len=tickArray.length; i<len; ++i) {
1156                var next = i + 1;
1157                if (tickArray[next] && tickArray[next] >= val) {
1158                    var diff1 = val - tickArray[i];
1159                    var diff2 = tickArray[next] - val;
1160                    return (diff2 > diff1) ? tickArray[i] : tickArray[next];
1161                }
1162            }
1163
1164            // The value is larger than the last tick, so we return the last
1165            // tick.
1166            return tickArray[tickArray.length - 1];
1167        }
1168    },
1169
1170    /**
1171     * toString method
1172     * @method toString
1173     * @return {string} string representation of the dd obj
1174     */
1175    toString: function() {
1176        return ("DragDrop " + this.id);
1177    }
1178
1179};
1180
1181})();
1182/*
1183 * The drag and drop utility provides a framework for building drag and drop
1184 * applications.  In addition to enabling drag and drop for specific elements,
1185 * the drag and drop elements are tracked by the manager class, and the
1186 * interactions between the various elements are tracked during the drag and
1187 * the implementing code is notified about these important moments.
1188 */
1189
1190// Only load the library once.  Rewriting the manager class would orphan
1191// existing drag and drop instances.
1192if (!Ext.dd.DragDropMgr) {
1193
1194/**
1195 * @class Ext.dd.DragDropMgr
1196 * DragDropMgr is a singleton that tracks the element interaction for
1197 * all DragDrop items in the window.  Generally, you will not call
1198 * this class directly, but it does have helper methods that could
1199 * be useful in your DragDrop implementations.
1200 * @singleton
1201 */
1202Ext.dd.DragDropMgr = function() {
1203
1204    var Event = Ext.EventManager;
1205
1206    return {
1207
1208        /**
1209         * Two dimensional Array of registered DragDrop objects.  The first
1210         * dimension is the DragDrop item group, the second the DragDrop
1211         * object.
1212         * @property ids
1213         * @type String[]
1214         * @private
1215         * @static
1216         */
1217        ids: {},
1218
1219        /**
1220         * Array of element ids defined as drag handles.  Used to determine
1221         * if the element that generated the mousedown event is actually the
1222         * handle and not the html element itself.
1223         * @property handleIds
1224         * @type String[]
1225         * @private
1226         * @static
1227         */
1228        handleIds: {},
1229
1230        /**
1231         * the DragDrop object that is currently being dragged
1232         * @property dragCurrent
1233         * @type DragDrop
1234         * @private
1235         * @static
1236         **/
1237        dragCurrent: null,
1238
1239        /**
1240         * the DragDrop object(s) that are being hovered over
1241         * @property dragOvers
1242         * @type Array
1243         * @private
1244         * @static
1245         */
1246        dragOvers: {},
1247
1248        /**
1249         * the X distance between the cursor and the object being dragged
1250         * @property deltaX
1251         * @type int
1252         * @private
1253         * @static
1254         */
1255        deltaX: 0,
1256
1257        /**
1258         * the Y distance between the cursor and the object being dragged
1259         * @property deltaY
1260         * @type int
1261         * @private
1262         * @static
1263         */
1264        deltaY: 0,
1265
1266        /**
1267         * Flag to determine if we should prevent the default behavior of the
1268         * events we define. By default this is true, but this can be set to
1269         * false if you need the default behavior (not recommended)
1270         * @property preventDefault
1271         * @type boolean
1272         * @static
1273         */
1274        preventDefault: true,
1275
1276        /**
1277         * Flag to determine if we should stop the propagation of the events
1278         * we generate. This is true by default but you may want to set it to
1279         * false if the html element contains other features that require the
1280         * mouse click.
1281         * @property stopPropagation
1282         * @type boolean
1283         * @static
1284         */
1285        stopPropagation: true,
1286
1287        /**
1288         * Internal flag that is set to true when drag and drop has been
1289         * intialized
1290         * @property initialized
1291         * @private
1292         * @static
1293         */
1294        initialized: false,
1295
1296        /**
1297         * All drag and drop can be disabled.
1298         * @property locked
1299         * @private
1300         * @static
1301         */
1302        locked: false,
1303
1304        /**
1305         * Called the first time an element is registered.
1306         * @method init
1307         * @private
1308         * @static
1309         */
1310        init: function() {
1311            this.initialized = true;
1312        },
1313
1314        /**
1315         * In point mode, drag and drop interaction is defined by the
1316         * location of the cursor during the drag/drop
1317         * @property POINT
1318         * @type int
1319         * @static
1320         */
1321        POINT: 0,
1322
1323        /**
1324         * In intersect mode, drag and drop interaction is defined by the
1325         * overlap of two or more drag and drop objects.
1326         * @property INTERSECT
1327         * @type int
1328         * @static
1329         */
1330        INTERSECT: 1,
1331
1332        /**
1333         * The current drag and drop mode.  Default: POINT
1334         * @property mode
1335         * @type int
1336         * @static
1337         */
1338        mode: 0,
1339
1340        /**
1341         * Runs method on all drag and drop objects
1342         * @method _execOnAll
1343         * @private
1344         * @static
1345         */
1346        _execOnAll: function(sMethod, args) {
1347            for (var i in this.ids) {
1348                for (var j in this.ids[i]) {
1349                    var oDD = this.ids[i][j];
1350                    if (! this.isTypeOfDD(oDD)) {
1351                        continue;
1352                    }
1353                    oDD[sMethod].apply(oDD, args);
1354                }
1355            }
1356        },
1357
1358        /**
1359         * Drag and drop initialization.  Sets up the global event handlers
1360         * @method _onLoad
1361         * @private
1362         * @static
1363         */
1364        _onLoad: function() {
1365
1366            this.init();
1367
1368
1369            Event.on(document, "mouseup",   this.handleMouseUp, this, true);
1370            Event.on(document, "mousemove", this.handleMouseMove, this, true);
1371            Event.on(window,   "unload",    this._onUnload, this, true);
1372            Event.on(window,   "resize",    this._onResize, this, true);
1373            // Event.on(window,   "mouseout",    this._test);
1374
1375        },
1376
1377        /**
1378         * Reset constraints on all drag and drop objs
1379         * @method _onResize
1380         * @private
1381         * @static
1382         */
1383        _onResize: function(e) {
1384            this._execOnAll("resetConstraints", []);
1385        },
1386
1387        /**
1388         * Lock all drag and drop functionality
1389         * @method lock
1390         * @static
1391         */
1392        lock: function() { this.locked = true; },
1393
1394        /**
1395         * Unlock all drag and drop functionality
1396         * @method unlock
1397         * @static
1398         */
1399        unlock: function() { this.locked = false; },
1400
1401        /**
1402         * Is drag and drop locked?
1403         * @method isLocked
1404         * @return {boolean} True if drag and drop is locked, false otherwise.
1405         * @static
1406         */
1407        isLocked: function() { return this.locked; },
1408
1409        /**
1410         * Location cache that is set for all drag drop objects when a drag is
1411         * initiated, cleared when the drag is finished.
1412         * @property locationCache
1413         * @private
1414         * @static
1415         */
1416        locationCache: {},
1417
1418        /**
1419         * Set useCache to false if you want to force object the lookup of each
1420         * drag and drop linked element constantly during a drag.
1421         * @property useCache
1422         * @type boolean
1423         * @static
1424         */
1425        useCache: true,
1426
1427        /**
1428         * The number of pixels that the mouse needs to move after the
1429         * mousedown before the drag is initiated.  Default=3;
1430         * @property clickPixelThresh
1431         * @type int
1432         * @static
1433         */
1434        clickPixelThresh: 3,
1435
1436        /**
1437         * The number of milliseconds after the mousedown event to initiate the
1438         * drag if we don't get a mouseup event. Default=350
1439         * @property clickTimeThresh
1440         * @type int
1441         * @static
1442         */
1443        clickTimeThresh: 350,
1444
1445        /**
1446         * Flag that indicates that either the drag pixel threshold or the
1447         * mousdown time threshold has been met
1448         * @property dragThreshMet
1449         * @type boolean
1450         * @private
1451         * @static
1452         */
1453        dragThreshMet: false,
1454
1455        /**
1456         * Timeout used for the click time threshold
1457         * @property clickTimeout
1458         * @type Object
1459         * @private
1460         * @static
1461         */
1462        clickTimeout: null,
1463
1464        /**
1465         * The X position of the mousedown event stored for later use when a
1466         * drag threshold is met.
1467         * @property startX
1468         * @type int
1469         * @private
1470         * @static
1471         */
1472        startX: 0,
1473
1474        /**
1475         * The Y position of the mousedown event stored for later use when a
1476         * drag threshold is met.
1477         * @property startY
1478         * @type int
1479         * @private
1480         * @static
1481         */
1482        startY: 0,
1483
1484        /**
1485         * Each DragDrop instance must be registered with the DragDropMgr.
1486         * This is executed in DragDrop.init()
1487         * @method regDragDrop
1488         * @param {DragDrop} oDD the DragDrop object to register
1489         * @param {String} sGroup the name of the group this element belongs to
1490         * @static
1491         */
1492        regDragDrop: function(oDD, sGroup) {
1493            if (!this.initialized) { this.init(); }
1494
1495            if (!this.ids[sGroup]) {
1496                this.ids[sGroup] = {};
1497            }
1498            this.ids[sGroup][oDD.id] = oDD;
1499        },
1500
1501        /**
1502         * Removes the supplied dd instance from the supplied group. Executed
1503         * by DragDrop.removeFromGroup, so don't call this function directly.
1504         * @method removeDDFromGroup
1505         * @private
1506         * @static
1507         */
1508        removeDDFromGroup: function(oDD, sGroup) {
1509            if (!this.ids[sGroup]) {
1510                this.ids[sGroup] = {};
1511            }
1512
1513            var obj = this.ids[sGroup];
1514            if (obj && obj[oDD.id]) {
1515                delete obj[oDD.id];
1516            }
1517        },
1518
1519        /**
1520         * Unregisters a drag and drop item.  This is executed in
1521         * DragDrop.unreg, use that method instead of calling this directly.
1522         * @method _remove
1523         * @private
1524         * @static
1525         */
1526        _remove: function(oDD) {
1527            for (var g in oDD.groups) {
1528                if (g && this.ids[g] && this.ids[g][oDD.id]) {
1529                    delete this.ids[g][oDD.id];
1530                }
1531            }
1532            delete this.handleIds[oDD.id];
1533        },
1534
1535        /**
1536         * Each DragDrop handle element must be registered.  This is done
1537         * automatically when executing DragDrop.setHandleElId()
1538         * @method regHandle
1539         * @param {String} sDDId the DragDrop id this element is a handle for
1540         * @param {String} sHandleId the id of the element that is the drag
1541         * handle
1542         * @static
1543         */
1544        regHandle: function(sDDId, sHandleId) {
1545            if (!this.handleIds[sDDId]) {
1546                this.handleIds[sDDId] = {};
1547            }
1548            this.handleIds[sDDId][sHandleId] = sHandleId;
1549        },
1550
1551        /**
1552         * Utility function to determine if a given element has been
1553         * registered as a drag drop item.
1554         * @method isDragDrop
1555         * @param {String} id the element id to check
1556         * @return {boolean} true if this element is a DragDrop item,
1557         * false otherwise
1558         * @static
1559         */
1560        isDragDrop: function(id) {
1561            return ( this.getDDById(id) ) ? true : false;
1562        },
1563
1564        /**
1565         * Returns the drag and drop instances that are in all groups the
1566         * passed in instance belongs to.
1567         * @method getRelated
1568         * @param {DragDrop} p_oDD the obj to get related data for
1569         * @param {boolean} bTargetsOnly if true, only return targetable objs
1570         * @return {DragDrop[]} the related instances
1571         * @static
1572         */
1573        getRelated: function(p_oDD, bTargetsOnly) {
1574            var oDDs = [];
1575            for (var i in p_oDD.groups) {
1576                for (var j in this.ids[i]) {
1577                    var dd = this.ids[i][j];
1578                    if (! this.isTypeOfDD(dd)) {
1579                        continue;
1580                    }
1581                    if (!bTargetsOnly || dd.isTarget) {
1582                        oDDs[oDDs.length] = dd;
1583                    }
1584                }
1585            }
1586
1587            return oDDs;
1588        },
1589
1590        /**
1591         * Returns true if the specified dd target is a legal target for
1592         * the specifice drag obj
1593         * @method isLegalTarget
1594         * @param {DragDrop} oDD the drag obj
1595         * @param {DragDrop} oTargetDD the target
1596         * @return {boolean} true if the target is a legal target for the
1597         * dd obj
1598         * @static
1599         */
1600        isLegalTarget: function (oDD, oTargetDD) {
1601            var targets = this.getRelated(oDD, true);
1602            for (var i=0, len=targets.length;i<len;++i) {
1603                if (targets[i].id == oTargetDD.id) {
1604                    return true;
1605                }
1606            }
1607
1608            return false;
1609        },
1610
1611        /**
1612         * My goal is to be able to transparently determine if an object is
1613         * typeof DragDrop, and the exact subclass of DragDrop.  typeof
1614         * returns "object", oDD.constructor.toString() always returns
1615         * "DragDrop" and not the name of the subclass.  So for now it just
1616         * evaluates a well-known variable in DragDrop.
1617         * @method isTypeOfDD
1618         * @param {Object} the object to evaluate
1619         * @return {boolean} true if typeof oDD = DragDrop
1620         * @static
1621         */
1622        isTypeOfDD: function (oDD) {
1623            return (oDD && oDD.__ygDragDrop);
1624        },
1625
1626        /**
1627         * Utility function to determine if a given element has been
1628         * registered as a drag drop handle for the given Drag Drop object.
1629         * @method isHandle
1630         * @param {String} id the element id to check
1631         * @return {boolean} true if this element is a DragDrop handle, false
1632         * otherwise
1633         * @static
1634         */
1635        isHandle: function(sDDId, sHandleId) {
1636            return ( this.handleIds[sDDId] &&
1637                            this.handleIds[sDDId][sHandleId] );
1638        },
1639
1640        /**
1641         * Returns the DragDrop instance for a given id
1642         * @method getDDById
1643         * @param {String} id the id of the DragDrop object
1644         * @return {DragDrop} the drag drop object, null if it is not found
1645         * @static
1646         */
1647        getDDById: function(id) {
1648            for (var i in this.ids) {
1649                if (this.ids[i][id]) {
1650                    return this.ids[i][id];
1651                }
1652            }
1653            return null;
1654        },
1655
1656        /**
1657         * Fired after a registered DragDrop object gets the mousedown event.
1658         * Sets up the events required to track the object being dragged
1659         * @method handleMouseDown
1660         * @param {Event} e the event
1661         * @param oDD the DragDrop object being dragged
1662         * @private
1663         * @static
1664         */
1665        handleMouseDown: function(e, oDD) {
1666            if(Ext.QuickTips){
1667                Ext.QuickTips.ddDisable();
1668            }
1669            if(this.dragCurrent){
1670                // the original browser mouseup wasn't handled (e.g. outside FF browser window)
1671                // so clean up first to avoid breaking the next drag
1672                this.handleMouseUp(e);
1673            }
1674           
1675            this.currentTarget = e.getTarget();
1676            this.dragCurrent = oDD;
1677
1678            var el = oDD.getEl();
1679
1680            // track start position
1681            this.startX = e.getPageX();
1682            this.startY = e.getPageY();
1683
1684            this.deltaX = this.startX - el.offsetLeft;
1685            this.deltaY = this.startY - el.offsetTop;
1686
1687            this.dragThreshMet = false;
1688
1689            this.clickTimeout = setTimeout(
1690                    function() {
1691                        var DDM = Ext.dd.DDM;
1692                        DDM.startDrag(DDM.startX, DDM.startY);
1693                    },
1694                    this.clickTimeThresh );
1695        },
1696
1697        /**
1698         * Fired when either the drag pixel threshol or the mousedown hold
1699         * time threshold has been met.
1700         * @method startDrag
1701         * @param x {int} the X position of the original mousedown
1702         * @param y {int} the Y position of the original mousedown
1703         * @static
1704         */
1705        startDrag: function(x, y) {
1706            clearTimeout(this.clickTimeout);
1707            if (this.dragCurrent) {
1708                this.dragCurrent.b4StartDrag(x, y);
1709                this.dragCurrent.startDrag(x, y);
1710            }
1711            this.dragThreshMet = true;
1712        },
1713
1714        /**
1715         * Internal function to handle the mouseup event.  Will be invoked
1716         * from the context of the document.
1717         * @method handleMouseUp
1718         * @param {Event} e the event
1719         * @private
1720         * @static
1721         */
1722        handleMouseUp: function(e) {
1723
1724            if(Ext.QuickTips){
1725                Ext.QuickTips.ddEnable();
1726            }
1727            if (! this.dragCurrent) {
1728                return;
1729            }
1730
1731            clearTimeout(this.clickTimeout);
1732
1733            if (this.dragThreshMet) {
1734                this.fireEvents(e, true);
1735            } else {
1736            }
1737
1738            this.stopDrag(e);
1739
1740            this.stopEvent(e);
1741        },
1742
1743        /**
1744         * Utility to stop event propagation and event default, if these
1745         * features are turned on.
1746         * @method stopEvent
1747         * @param {Event} e the event as returned by this.getEvent()
1748         * @static
1749         */
1750        stopEvent: function(e){
1751            if(this.stopPropagation) {
1752                e.stopPropagation();
1753            }
1754
1755            if (this.preventDefault) {
1756                e.preventDefault();
1757            }
1758        },
1759
1760        /**
1761         * Internal function to clean up event handlers after the drag
1762         * operation is complete
1763         * @method stopDrag
1764         * @param {Event} e the event
1765         * @private
1766         * @static
1767         */
1768        stopDrag: function(e) {
1769            // Fire the drag end event for the item that was dragged
1770            if (this.dragCurrent) {
1771                if (this.dragThreshMet) {
1772                    this.dragCurrent.b4EndDrag(e);
1773                    this.dragCurrent.endDrag(e);
1774                }
1775
1776                this.dragCurrent.onMouseUp(e);
1777            }
1778
1779            this.dragCurrent = null;
1780            this.dragOvers = {};
1781        },
1782
1783        /**
1784         * Internal function to handle the mousemove event.  Will be invoked
1785         * from the context of the html element.
1786         *
1787         * @TODO figure out what we can do about mouse events lost when the
1788         * user drags objects beyond the window boundary.  Currently we can
1789         * detect this in internet explorer by verifying that the mouse is
1790         * down during the mousemove event.  Firefox doesn't give us the
1791         * button state on the mousemove event.
1792         * @method handleMouseMove
1793         * @param {Event} e the event
1794         * @private
1795         * @static
1796         */
1797        handleMouseMove: function(e) {
1798            if (! this.dragCurrent) {
1799                return true;
1800            }
1801            // var button = e.which || e.button;
1802
1803            // check for IE mouseup outside of page boundary
1804            if (Ext.isIE && (e.button !== 0 && e.button !== 1 && e.button !== 2)) {
1805                this.stopEvent(e);
1806                return this.handleMouseUp(e);
1807            }
1808
1809            if (!this.dragThreshMet) {
1810                var diffX = Math.abs(this.startX - e.getPageX());
1811                var diffY = Math.abs(this.startY - e.getPageY());
1812                if (diffX > this.clickPixelThresh ||
1813                            diffY > this.clickPixelThresh) {
1814                    this.startDrag(this.startX, this.startY);
1815                }
1816            }
1817
1818            if (this.dragThreshMet) {
1819                this.dragCurrent.b4Drag(e);
1820                this.dragCurrent.onDrag(e);
1821                if(!this.dragCurrent.moveOnly){
1822                    this.fireEvents(e, false);
1823                }
1824            }
1825
1826            this.stopEvent(e);
1827
1828            return true;
1829        },
1830
1831        /**
1832         * Iterates over all of the DragDrop elements to find ones we are
1833         * hovering over or dropping on
1834         * @method fireEvents
1835         * @param {Event} e the event
1836         * @param {boolean} isDrop is this a drop op or a mouseover op?
1837         * @private
1838         * @static
1839         */
1840        fireEvents: function(e, isDrop) {
1841            var dc = this.dragCurrent;
1842
1843            // If the user did the mouse up outside of the window, we could
1844            // get here even though we have ended the drag.
1845            if (!dc || dc.isLocked()) {
1846                return;
1847            }
1848
1849            var pt = e.getPoint();
1850
1851            // cache the previous dragOver array
1852            var oldOvers = [];
1853
1854            var outEvts   = [];
1855            var overEvts  = [];
1856            var dropEvts  = [];
1857            var enterEvts = [];
1858
1859            // Check to see if the object(s) we were hovering over is no longer
1860            // being hovered over so we can fire the onDragOut event
1861            for (var i in this.dragOvers) {
1862
1863                var ddo = this.dragOvers[i];
1864
1865                if (! this.isTypeOfDD(ddo)) {
1866                    continue;
1867                }
1868
1869                if (! this.isOverTarget(pt, ddo, this.mode)) {
1870                    outEvts.push( ddo );
1871                }
1872
1873                oldOvers[i] = true;
1874                delete this.dragOvers[i];
1875            }
1876
1877            for (var sGroup in dc.groups) {
1878
1879                if ("string" != typeof sGroup) {
1880                    continue;
1881                }
1882
1883                for (i in this.ids[sGroup]) {
1884                    var oDD = this.ids[sGroup][i];
1885                    if (! this.isTypeOfDD(oDD)) {
1886                        continue;
1887                    }
1888
1889                    if (oDD.isTarget && !oDD.isLocked() && ((oDD != dc) || (dc.ignoreSelf === false))) {
1890                        if (this.isOverTarget(pt, oDD, this.mode)) {
1891                            // look for drop interactions
1892                            if (isDrop) {
1893                                dropEvts.push( oDD );
1894                            // look for drag enter and drag over interactions
1895                            } else {
1896
1897                                // initial drag over: dragEnter fires
1898                                if (!oldOvers[oDD.id]) {
1899                                    enterEvts.push( oDD );
1900                                // subsequent drag overs: dragOver fires
1901                                } else {
1902                                    overEvts.push( oDD );
1903                                }
1904
1905                                this.dragOvers[oDD.id] = oDD;
1906                            }
1907                        }
1908                    }
1909                }
1910            }
1911
1912            if (this.mode) {
1913                if (outEvts.length) {
1914                    dc.b4DragOut(e, outEvts);
1915                    dc.onDragOut(e, outEvts);
1916                }
1917
1918                if (enterEvts.length) {
1919                    dc.onDragEnter(e, enterEvts);
1920                }
1921
1922                if (overEvts.length) {
1923                    dc.b4DragOver(e, overEvts);
1924                    dc.onDragOver(e, overEvts);
1925                }
1926
1927                if (dropEvts.length) {
1928                    dc.b4DragDrop(e, dropEvts);
1929                    dc.onDragDrop(e, dropEvts);
1930                }
1931
1932            } else {
1933                // fire dragout events
1934                var len = 0;
1935                for (i=0, len=outEvts.length; i<len; ++i) {
1936                    dc.b4DragOut(e, outEvts[i].id);
1937                    dc.onDragOut(e, outEvts[i].id);
1938                }
1939
1940                // fire enter events
1941                for (i=0,len=enterEvts.length; i<len; ++i) {
1942                    // dc.b4DragEnter(e, oDD.id);
1943                    dc.onDragEnter(e, enterEvts[i].id);
1944                }
1945
1946                // fire over events
1947                for (i=0,len=overEvts.length; i<len; ++i) {
1948                    dc.b4DragOver(e, overEvts[i].id);
1949                    dc.onDragOver(e, overEvts[i].id);
1950                }
1951
1952                // fire drop events
1953                for (i=0, len=dropEvts.length; i<len; ++i) {
1954                    dc.b4DragDrop(e, dropEvts[i].id);
1955                    dc.onDragDrop(e, dropEvts[i].id);
1956                }
1957
1958            }
1959
1960            // notify about a drop that did not find a target
1961            if (isDrop && !dropEvts.length) {
1962                dc.onInvalidDrop(e);
1963            }
1964
1965        },
1966
1967        /**
1968         * Helper function for getting the best match from the list of drag
1969         * and drop objects returned by the drag and drop events when we are
1970         * in INTERSECT mode.  It returns either the first object that the
1971         * cursor is over, or the object that has the greatest overlap with
1972         * the dragged element.
1973         * @method getBestMatch
1974         * @param  {DragDrop[]} dds The array of drag and drop objects
1975         * targeted
1976         * @return {DragDrop}       The best single match
1977         * @static
1978         */
1979        getBestMatch: function(dds) {
1980            var winner = null;
1981            // Return null if the input is not what we expect
1982            //if (!dds || !dds.length || dds.length == 0) {
1983               // winner = null;
1984            // If there is only one item, it wins
1985            //} else if (dds.length == 1) {
1986
1987            var len = dds.length;
1988
1989            if (len == 1) {
1990                winner = dds[0];
1991            } else {
1992                // Loop through the targeted items
1993                for (var i=0; i<len; ++i) {
1994                    var dd = dds[i];
1995                    // If the cursor is over the object, it wins.  If the
1996                    // cursor is over multiple matches, the first one we come
1997                    // to wins.
1998                    if (dd.cursorIsOver) {
1999                        winner = dd;
2000                        break;
2001                    // Otherwise the object with the most overlap wins
2002                    } else {
2003                        if (!winner ||
2004                            winner.overlap.getArea() < dd.overlap.getArea()) {
2005                            winner = dd;
2006                        }
2007                    }
2008                }
2009            }
2010
2011            return winner;
2012        },
2013
2014        /**
2015         * Refreshes the cache of the top-left and bottom-right points of the
2016         * drag and drop objects in the specified group(s).  This is in the
2017         * format that is stored in the drag and drop instance, so typical
2018         * usage is:
2019         * <code>
2020         * Ext.dd.DragDropMgr.refreshCache(ddinstance.groups);
2021         * </code>
2022         * Alternatively:
2023         * <code>
2024         * Ext.dd.DragDropMgr.refreshCache({group1:true, group2:true});
2025         * </code>
2026         * @TODO this really should be an indexed array.  Alternatively this
2027         * method could accept both.
2028         * @method refreshCache
2029         * @param {Object} groups an associative array of groups to refresh
2030         * @static
2031         */
2032        refreshCache: function(groups) {
2033            for (var sGroup in groups) {
2034                if ("string" != typeof sGroup) {
2035                    continue;
2036                }
2037                for (var i in this.ids[sGroup]) {
2038                    var oDD = this.ids[sGroup][i];
2039
2040                    if (this.isTypeOfDD(oDD)) {
2041                    // if (this.isTypeOfDD(oDD) && oDD.isTarget) {
2042                        var loc = this.getLocation(oDD);
2043                        if (loc) {
2044                            this.locationCache[oDD.id] = loc;
2045                        } else {
2046                            delete this.locationCache[oDD.id];
2047                            // this will unregister the drag and drop object if
2048                            // the element is not in a usable state
2049                            // oDD.unreg();
2050                        }
2051                    }
2052                }
2053            }
2054        },
2055
2056        /**
2057         * This checks to make sure an element exists and is in the DOM.  The
2058         * main purpose is to handle cases where innerHTML is used to remove
2059         * drag and drop objects from the DOM.  IE provides an 'unspecified
2060         * error' when trying to access the offsetParent of such an element
2061         * @method verifyEl
2062         * @param {HTMLElement} el the element to check
2063         * @return {boolean} true if the element looks usable
2064         * @static
2065         */
2066        verifyEl: function(el) {
2067            if (el) {
2068                var parent;
2069                if(Ext.isIE){
2070                    try{
2071                        parent = el.offsetParent;
2072                    }catch(e){}
2073                }else{
2074                    parent = el.offsetParent;
2075                }
2076                if (parent) {
2077                    return true;
2078                }
2079            }
2080
2081            return false;
2082        },
2083
2084        /**
2085         * Returns a Region object containing the drag and drop element's position
2086         * and size, including the padding configured for it
2087         * @method getLocation
2088         * @param {DragDrop} oDD the drag and drop object to get the
2089         *                       location for
2090         * @return {Ext.lib.Region} a Region object representing the total area
2091         *                             the element occupies, including any padding
2092         *                             the instance is configured for.
2093         * @static
2094         */
2095        getLocation: function(oDD) {
2096            if (! this.isTypeOfDD(oDD)) {
2097                return null;
2098            }
2099
2100            var el = oDD.getEl(), pos, x1, x2, y1, y2, t, r, b, l, region;
2101
2102            try {
2103                pos= Ext.lib.Dom.getXY(el);
2104            } catch (e) { }
2105
2106            if (!pos) {
2107                return null;
2108            }
2109
2110            x1 = pos[0];
2111            x2 = x1 + el.offsetWidth;
2112            y1 = pos[1];
2113            y2 = y1 + el.offsetHeight;
2114
2115            t = y1 - oDD.padding[0];
2116            r = x2 + oDD.padding[1];
2117            b = y2 + oDD.padding[2];
2118            l = x1 - oDD.padding[3];
2119
2120            region = new Ext.lib.Region( t, r, b, l );
2121            /*
2122             * The code below is to ensure that large scrolling elements will
2123             * only have their visible area recognized as a drop target, otherwise it
2124             * can potentially erronously register as a target when the element scrolls
2125             * over the top of something below it.
2126             */
2127            el = Ext.get(el.parentNode);
2128            while (el && region) {
2129                    if (el.isScrollable()) {
2130                        // check whether our element is visible in the view port:
2131                        region = region.intersect(el.getRegion());
2132                    }
2133                    el = el.parent();
2134            }
2135            return region;
2136        },
2137
2138        /**
2139         * Checks the cursor location to see if it over the target
2140         * @method isOverTarget
2141         * @param {Ext.lib.Point} pt The point to evaluate
2142         * @param {DragDrop} oTarget the DragDrop object we are inspecting
2143         * @return {boolean} true if the mouse is over the target
2144         * @private
2145         * @static
2146         */
2147        isOverTarget: function(pt, oTarget, intersect) {
2148            // use cache if available
2149            var loc = this.locationCache[oTarget.id];
2150            if (!loc || !this.useCache) {
2151                loc = this.getLocation(oTarget);
2152                this.locationCache[oTarget.id] = loc;
2153
2154            }
2155
2156            if (!loc) {
2157                return false;
2158            }
2159
2160            oTarget.cursorIsOver = loc.contains( pt );
2161
2162            // DragDrop is using this as a sanity check for the initial mousedown
2163            // in this case we are done.  In POINT mode, if the drag obj has no
2164            // contraints, we are also done. Otherwise we need to evaluate the
2165            // location of the target as related to the actual location of the
2166            // dragged element.
2167            var dc = this.dragCurrent;
2168            if (!dc || !dc.getTargetCoord ||
2169                    (!intersect && !dc.constrainX && !dc.constrainY)) {
2170                return oTarget.cursorIsOver;
2171            }
2172
2173            oTarget.overlap = null;
2174
2175            // Get the current location of the drag element, this is the
2176            // location of the mouse event less the delta that represents
2177            // where the original mousedown happened on the element.  We
2178            // need to consider constraints and ticks as well.
2179            var pos = dc.getTargetCoord(pt.x, pt.y);
2180
2181            var el = dc.getDragEl();
2182            var curRegion = new Ext.lib.Region( pos.y,
2183                                                   pos.x + el.offsetWidth,
2184                                                   pos.y + el.offsetHeight,
2185                                                   pos.x );
2186
2187            var overlap = curRegion.intersect(loc);
2188
2189            if (overlap) {
2190                oTarget.overlap = overlap;
2191                return (intersect) ? true : oTarget.cursorIsOver;
2192            } else {
2193                return false;
2194            }
2195        },
2196
2197        /**
2198         * unload event handler
2199         * @method _onUnload
2200         * @private
2201         * @static
2202         */
2203        _onUnload: function(e, me) {
2204            Event.removeListener(document, "mouseup",   this.handleMouseUp, this);
2205            Event.removeListener(document, "mousemove", this.handleMouseMove, this);
2206            Event.removeListener(window,   "resize",    this._onResize, this);
2207            Ext.dd.DragDropMgr.unregAll();
2208        },
2209
2210        /**
2211         * Cleans up the drag and drop events and objects.
2212         * @method unregAll
2213         * @private
2214         * @static
2215         */
2216        unregAll: function() {
2217
2218            if (this.dragCurrent) {
2219                this.stopDrag();
2220                this.dragCurrent = null;
2221            }
2222
2223            this._execOnAll("unreg", []);
2224
2225            for (var i in this.elementCache) {
2226                delete this.elementCache[i];
2227            }
2228
2229            this.elementCache = {};
2230            this.ids = {};
2231        },
2232
2233        /**
2234         * A cache of DOM elements
2235         * @property elementCache
2236         * @private
2237         * @static
2238         */
2239        elementCache: {},
2240
2241        /**
2242         * Get the wrapper for the DOM element specified
2243         * @method getElWrapper
2244         * @param {String} id the id of the element to get
2245         * @return {Ext.dd.DDM.ElementWrapper} the wrapped element
2246         * @private
2247         * @deprecated This wrapper isn't that useful
2248         * @static
2249         */
2250        getElWrapper: function(id) {
2251            var oWrapper = this.elementCache[id];
2252            if (!oWrapper || !oWrapper.el) {
2253                oWrapper = this.elementCache[id] =
2254                    new this.ElementWrapper(Ext.getDom(id));
2255            }
2256            return oWrapper;
2257        },
2258
2259        /**
2260         * Returns the actual DOM element
2261         * @method getElement
2262         * @param {String} id the id of the elment to get
2263         * @return {Object} The element
2264         * @deprecated use Ext.lib.Ext.getDom instead
2265         * @static
2266         */
2267        getElement: function(id) {
2268            return Ext.getDom(id);
2269        },
2270
2271        /**
2272         * Returns the style property for the DOM element (i.e.,
2273         * document.getElById(id).style)
2274         * @method getCss
2275         * @param {String} id the id of the elment to get
2276         * @return {Object} The style property of the element
2277         * @deprecated use Ext.lib.Dom instead
2278         * @static
2279         */
2280        getCss: function(id) {
2281            var el = Ext.getDom(id);
2282            return (el) ? el.style : null;
2283        },
2284
2285        /**
2286         * Inner class for cached elements
2287         * @class Ext.dd.DragDropMgr.ElementWrapper
2288         * @for DragDropMgr
2289         * @private
2290         * @deprecated
2291         */
2292        ElementWrapper: function(el) {
2293                /**
2294                 * The element
2295                 * @property el
2296                 */
2297                this.el = el || null;
2298                /**
2299                 * The element id
2300                 * @property id
2301                 */
2302                this.id = this.el && el.id;
2303                /**
2304                 * A reference to the style property
2305                 * @property css
2306                 */
2307                this.css = this.el && el.style;
2308            },
2309
2310        /**
2311         * Returns the X position of an html element
2312         * @method getPosX
2313         * @param el the element for which to get the position
2314         * @return {int} the X coordinate
2315         * @for DragDropMgr
2316         * @deprecated use Ext.lib.Dom.getX instead
2317         * @static
2318         */
2319        getPosX: function(el) {
2320            return Ext.lib.Dom.getX(el);
2321        },
2322
2323        /**
2324         * Returns the Y position of an html element
2325         * @method getPosY
2326         * @param el the element for which to get the position
2327         * @return {int} the Y coordinate
2328         * @deprecated use Ext.lib.Dom.getY instead
2329         * @static
2330         */
2331        getPosY: function(el) {
2332            return Ext.lib.Dom.getY(el);
2333        },
2334
2335        /**
2336         * Swap two nodes.  In IE, we use the native method, for others we
2337         * emulate the IE behavior
2338         * @method swapNode
2339         * @param n1 the first node to swap
2340         * @param n2 the other node to swap
2341         * @static
2342         */
2343        swapNode: function(n1, n2) {
2344            if (n1.swapNode) {
2345                n1.swapNode(n2);
2346            } else {
2347                var p = n2.parentNode;
2348                var s = n2.nextSibling;
2349
2350                if (s == n1) {
2351                    p.insertBefore(n1, n2);
2352                } else if (n2 == n1.nextSibling) {
2353                    p.insertBefore(n2, n1);
2354                } else {
2355                    n1.parentNode.replaceChild(n2, n1);
2356                    p.insertBefore(n1, s);
2357                }
2358            }
2359        },
2360
2361        /**
2362         * Returns the current scroll position
2363         * @method getScroll
2364         * @private
2365         * @static
2366         */
2367        getScroll: function () {
2368            var t, l, dde=document.documentElement, db=document.body;
2369            if (dde && (dde.scrollTop || dde.scrollLeft)) {
2370                t = dde.scrollTop;
2371                l = dde.scrollLeft;
2372            } else if (db) {
2373                t = db.scrollTop;
2374                l = db.scrollLeft;
2375            } else {
2376
2377            }
2378            return { top: t, left: l };
2379        },
2380
2381        /**
2382         * Returns the specified element style property
2383         * @method getStyle
2384         * @param {HTMLElement} el          the element
2385         * @param {string}      styleProp   the style property
2386         * @return {string} The value of the style property
2387         * @deprecated use Ext.lib.Dom.getStyle
2388         * @static
2389         */
2390        getStyle: function(el, styleProp) {
2391            return Ext.fly(el).getStyle(styleProp);
2392        },
2393
2394        /**
2395         * Gets the scrollTop
2396         * @method getScrollTop
2397         * @return {int} the document's scrollTop
2398         * @static
2399         */
2400        getScrollTop: function () {
2401            return this.getScroll().top;
2402        },
2403
2404        /**
2405         * Gets the scrollLeft
2406         * @method getScrollLeft
2407         * @return {int} the document's scrollTop
2408         * @static
2409         */
2410        getScrollLeft: function () {
2411            return this.getScroll().left;
2412        },
2413
2414        /**
2415         * Sets the x/y position of an element to the location of the
2416         * target element.
2417         * @method moveToEl
2418         * @param {HTMLElement} moveEl      The element to move
2419         * @param {HTMLElement} targetEl    The position reference element
2420         * @static
2421         */
2422        moveToEl: function (moveEl, targetEl) {
2423            var aCoord = Ext.lib.Dom.getXY(targetEl);
2424            Ext.lib.Dom.setXY(moveEl, aCoord);
2425        },
2426
2427        /**
2428         * Numeric array sort function
2429         * @method numericSort
2430         * @static
2431         */
2432        numericSort: function(a, b) {
2433            return (a - b);
2434        },
2435
2436        /**
2437         * Internal counter
2438         * @property _timeoutCount
2439         * @private
2440         * @static
2441         */
2442        _timeoutCount: 0,
2443
2444        /**
2445         * Trying to make the load order less important.  Without this we get
2446         * an error if this file is loaded before the Event Utility.
2447         * @method _addListeners
2448         * @private
2449         * @static
2450         */
2451        _addListeners: function() {
2452            var DDM = Ext.dd.DDM;
2453            if ( Ext.lib.Event && document ) {
2454                DDM._onLoad();
2455            } else {
2456                if (DDM._timeoutCount > 2000) {
2457                } else {
2458                    setTimeout(DDM._addListeners, 10);
2459                    if (document && document.body) {
2460                        DDM._timeoutCount += 1;
2461                    }
2462                }
2463            }
2464        },
2465
2466        /**
2467         * Recursively searches the immediate parent and all child nodes for
2468         * the handle element in order to determine wheter or not it was
2469         * clicked.
2470         * @method handleWasClicked
2471         * @param node the html element to inspect
2472         * @static
2473         */
2474        handleWasClicked: function(node, id) {
2475            if (this.isHandle(id, node.id)) {
2476                return true;
2477            } else {
2478                // check to see if this is a text node child of the one we want
2479                var p = node.parentNode;
2480
2481                while (p) {
2482                    if (this.isHandle(id, p.id)) {
2483                        return true;
2484                    } else {
2485                        p = p.parentNode;
2486                    }
2487                }
2488            }
2489
2490            return false;
2491        }
2492
2493    };
2494
2495}();
2496
2497// shorter alias, save a few bytes
2498Ext.dd.DDM = Ext.dd.DragDropMgr;
2499Ext.dd.DDM._addListeners();
2500
2501}
2502
2503/**
2504 * @class Ext.dd.DD
2505 * A DragDrop implementation where the linked element follows the
2506 * mouse cursor during a drag.
2507 * @extends Ext.dd.DragDrop
2508 * @constructor
2509 * @param {String} id the id of the linked element
2510 * @param {String} sGroup the group of related DragDrop items
2511 * @param {object} config an object containing configurable attributes
2512 *                Valid properties for DD:
2513 *                    scroll
2514 */
2515Ext.dd.DD = function(id, sGroup, config) {
2516    if (id) {
2517        this.init(id, sGroup, config);
2518    }
2519};
2520
2521Ext.extend(Ext.dd.DD, Ext.dd.DragDrop, {
2522
2523    /**
2524     * When set to true, the utility automatically tries to scroll the browser
2525     * window when a drag and drop element is dragged near the viewport boundary.
2526     * Defaults to true.
2527     * @property scroll
2528     * @type boolean
2529     */
2530    scroll: true,
2531
2532    /**
2533     * Sets the pointer offset to the distance between the linked element's top
2534     * left corner and the location the element was clicked
2535     * @method autoOffset
2536     * @param {int} iPageX the X coordinate of the click
2537     * @param {int} iPageY the Y coordinate of the click
2538     */
2539    autoOffset: function(iPageX, iPageY) {
2540        var x = iPageX - this.startPageX;
2541        var y = iPageY - this.startPageY;
2542        this.setDelta(x, y);
2543    },
2544
2545    /**
2546     * Sets the pointer offset.  You can call this directly to force the
2547     * offset to be in a particular location (e.g., pass in 0,0 to set it
2548     * to the center of the object)
2549     * @method setDelta
2550     * @param {int} iDeltaX the distance from the left
2551     * @param {int} iDeltaY the distance from the top
2552     */
2553    setDelta: function(iDeltaX, iDeltaY) {
2554        this.deltaX = iDeltaX;
2555        this.deltaY = iDeltaY;
2556    },
2557
2558    /**
2559     * Sets the drag element to the location of the mousedown or click event,
2560     * maintaining the cursor location relative to the location on the element
2561     * that was clicked.  Override this if you want to place the element in a
2562     * location other than where the cursor is.
2563     * @method setDragElPos
2564     * @param {int} iPageX the X coordinate of the mousedown or drag event
2565     * @param {int} iPageY the Y coordinate of the mousedown or drag event
2566     */
2567    setDragElPos: function(iPageX, iPageY) {
2568        // the first time we do this, we are going to check to make sure
2569        // the element has css positioning
2570
2571        var el = this.getDragEl();
2572        this.alignElWithMouse(el, iPageX, iPageY);
2573    },
2574
2575    /**
2576     * Sets the element to the location of the mousedown or click event,
2577     * maintaining the cursor location relative to the location on the element
2578     * that was clicked.  Override this if you want to place the element in a
2579     * location other than where the cursor is.
2580     * @method alignElWithMouse
2581     * @param {HTMLElement} el the element to move
2582     * @param {int} iPageX the X coordinate of the mousedown or drag event
2583     * @param {int} iPageY the Y coordinate of the mousedown or drag event
2584     */
2585    alignElWithMouse: function(el, iPageX, iPageY) {
2586        var oCoord = this.getTargetCoord(iPageX, iPageY);
2587        var fly = el.dom ? el : Ext.fly(el, '_dd');
2588        if (!this.deltaSetXY) {
2589            var aCoord = [oCoord.x, oCoord.y];
2590            fly.setXY(aCoord);
2591            var newLeft = fly.getLeft(true);
2592            var newTop  = fly.getTop(true);
2593            this.deltaSetXY = [ newLeft - oCoord.x, newTop - oCoord.y ];
2594        } else {
2595            fly.setLeftTop(oCoord.x + this.deltaSetXY[0], oCoord.y + this.deltaSetXY[1]);
2596        }
2597
2598        this.cachePosition(oCoord.x, oCoord.y);
2599        this.autoScroll(oCoord.x, oCoord.y, el.offsetHeight, el.offsetWidth);
2600        return oCoord;
2601    },
2602
2603    /**
2604     * Saves the most recent position so that we can reset the constraints and
2605     * tick marks on-demand.  We need to know this so that we can calculate the
2606     * number of pixels the element is offset from its original position.
2607     * @method cachePosition
2608     * @param iPageX the current x position (optional, this just makes it so we
2609     * don't have to look it up again)
2610     * @param iPageY the current y position (optional, this just makes it so we
2611     * don't have to look it up again)
2612     */
2613    cachePosition: function(iPageX, iPageY) {
2614        if (iPageX) {
2615            this.lastPageX = iPageX;
2616            this.lastPageY = iPageY;
2617        } else {
2618            var aCoord = Ext.lib.Dom.getXY(this.getEl());
2619            this.lastPageX = aCoord[0];
2620            this.lastPageY = aCoord[1];
2621        }
2622    },
2623
2624    /**
2625     * Auto-scroll the window if the dragged object has been moved beyond the
2626     * visible window boundary.
2627     * @method autoScroll
2628     * @param {int} x the drag element's x position
2629     * @param {int} y the drag element's y position
2630     * @param {int} h the height of the drag element
2631     * @param {int} w the width of the drag element
2632     * @private
2633     */
2634    autoScroll: function(x, y, h, w) {
2635
2636        if (this.scroll) {
2637            // The client height
2638            var clientH = Ext.lib.Dom.getViewHeight();
2639
2640            // The client width
2641            var clientW = Ext.lib.Dom.getViewWidth();
2642
2643            // The amt scrolled down
2644            var st = this.DDM.getScrollTop();
2645
2646            // The amt scrolled right
2647            var sl = this.DDM.getScrollLeft();
2648
2649            // Location of the bottom of the element
2650            var bot = h + y;
2651
2652            // Location of the right of the element
2653            var right = w + x;
2654
2655            // The distance from the cursor to the bottom of the visible area,
2656            // adjusted so that we don't scroll if the cursor is beyond the
2657            // element drag constraints
2658            var toBot = (clientH + st - y - this.deltaY);
2659
2660            // The distance from the cursor to the right of the visible area
2661            var toRight = (clientW + sl - x - this.deltaX);
2662
2663
2664            // How close to the edge the cursor must be before we scroll
2665            // var thresh = (document.all) ? 100 : 40;
2666            var thresh = 40;
2667
2668            // How many pixels to scroll per autoscroll op.  This helps to reduce
2669            // clunky scrolling. IE is more sensitive about this ... it needs this
2670            // value to be higher.
2671            var scrAmt = (document.all) ? 80 : 30;
2672
2673            // Scroll down if we are near the bottom of the visible page and the
2674            // obj extends below the crease
2675            if ( bot > clientH && toBot < thresh ) {
2676                window.scrollTo(sl, st + scrAmt);
2677            }
2678
2679            // Scroll up if the window is scrolled down and the top of the object
2680            // goes above the top border
2681            if ( y < st && st > 0 && y - st < thresh ) {
2682                window.scrollTo(sl, st - scrAmt);
2683            }
2684
2685            // Scroll right if the obj is beyond the right border and the cursor is
2686            // near the border.
2687            if ( right > clientW && toRight < thresh ) {
2688                window.scrollTo(sl + scrAmt, st);
2689            }
2690
2691            // Scroll left if the window has been scrolled to the right and the obj
2692            // extends past the left border
2693            if ( x < sl && sl > 0 && x - sl < thresh ) {
2694                window.scrollTo(sl - scrAmt, st);
2695            }
2696        }
2697    },
2698
2699    /**
2700     * Finds the location the element should be placed if we want to move
2701     * it to where the mouse location less the click offset would place us.
2702     * @method getTargetCoord
2703     * @param {int} iPageX the X coordinate of the click
2704     * @param {int} iPageY the Y coordinate of the click
2705     * @return an object that contains the coordinates (Object.x and Object.y)
2706     * @private
2707     */
2708    getTargetCoord: function(iPageX, iPageY) {
2709        var x = iPageX - this.deltaX;
2710        var y = iPageY - this.deltaY;
2711
2712        if (this.constrainX) {
2713            if (x < this.minX) { x = this.minX; }
2714            if (x > this.maxX) { x = this.maxX; }
2715        }
2716
2717        if (this.constrainY) {
2718            if (y < this.minY) { y = this.minY; }
2719            if (y > this.maxY) { y = this.maxY; }
2720        }
2721
2722        x = this.getTick(x, this.xTicks);
2723        y = this.getTick(y, this.yTicks);
2724
2725
2726        return {x:x, y:y};
2727    },
2728
2729    /**
2730     * Sets up config options specific to this class. Overrides
2731     * Ext.dd.DragDrop, but all versions of this method through the
2732     * inheritance chain are called
2733     */
2734    applyConfig: function() {
2735        Ext.dd.DD.superclass.applyConfig.call(this);
2736        this.scroll = (this.config.scroll !== false);
2737    },
2738
2739    /**
2740     * Event that fires prior to the onMouseDown event.  Overrides
2741     * Ext.dd.DragDrop.
2742     */
2743    b4MouseDown: function(e) {
2744        // this.resetConstraints();
2745        this.autoOffset(e.getPageX(),
2746                            e.getPageY());
2747    },
2748
2749    /**
2750     * Event that fires prior to the onDrag event.  Overrides
2751     * Ext.dd.DragDrop.
2752     */
2753    b4Drag: function(e) {
2754        this.setDragElPos(e.getPageX(),
2755                            e.getPageY());
2756    },
2757
2758    toString: function() {
2759        return ("DD " + this.id);
2760    }
2761
2762    //////////////////////////////////////////////////////////////////////////
2763    // Debugging ygDragDrop events that can be overridden
2764    //////////////////////////////////////////////////////////////////////////
2765    /*
2766    startDrag: function(x, y) {
2767    },
2768
2769    onDrag: function(e) {
2770    },
2771
2772    onDragEnter: function(e, id) {
2773    },
2774
2775    onDragOver: function(e, id) {
2776    },
2777
2778    onDragOut: function(e, id) {
2779    },
2780
2781    onDragDrop: function(e, id) {
2782    },
2783
2784    endDrag: function(e) {
2785    }
2786
2787    */
2788
2789});
2790/**
2791 * @class Ext.dd.DDProxy
2792 * A DragDrop implementation that inserts an empty, bordered div into
2793 * the document that follows the cursor during drag operations.  At the time of
2794 * the click, the frame div is resized to the dimensions of the linked html
2795 * element, and moved to the exact location of the linked element.
2796 *
2797 * References to the "frame" element refer to the single proxy element that
2798 * was created to be dragged in place of all DDProxy elements on the
2799 * page.
2800 *
2801 * @extends Ext.dd.DD
2802 * @constructor
2803 * @param {String} id the id of the linked html element
2804 * @param {String} sGroup the group of related DragDrop objects
2805 * @param {object} config an object containing configurable attributes
2806 *                Valid properties for DDProxy in addition to those in DragDrop:
2807 *                   resizeFrame, centerFrame, dragElId
2808 */
2809Ext.dd.DDProxy = function(id, sGroup, config) {
2810    if (id) {
2811        this.init(id, sGroup, config);
2812        this.initFrame();
2813    }
2814};
2815
2816/**
2817 * The default drag frame div id
2818 * @property Ext.dd.DDProxy.dragElId
2819 * @type String
2820 * @static
2821 */
2822Ext.dd.DDProxy.dragElId = "ygddfdiv";
2823
2824Ext.extend(Ext.dd.DDProxy, Ext.dd.DD, {
2825
2826    /**
2827     * By default we resize the drag frame to be the same size as the element
2828     * we want to drag (this is to get the frame effect).  We can turn it off
2829     * if we want a different behavior.
2830     * @property resizeFrame
2831     * @type boolean
2832     */
2833    resizeFrame: true,
2834
2835    /**
2836     * By default the frame is positioned exactly where the drag element is, so
2837     * we use the cursor offset provided by Ext.dd.DD.  Another option that works only if
2838     * you do not have constraints on the obj is to have the drag frame centered
2839     * around the cursor.  Set centerFrame to true for this effect.
2840     * @property centerFrame
2841     * @type boolean
2842     */
2843    centerFrame: false,
2844
2845    /**
2846     * Creates the proxy element if it does not yet exist
2847     * @method createFrame
2848     */
2849    createFrame: function() {
2850        var self = this;
2851        var body = document.body;
2852
2853        if (!body || !body.firstChild) {
2854            setTimeout( function() { self.createFrame(); }, 50 );
2855            return;
2856        }
2857
2858        var div = this.getDragEl();
2859
2860        if (!div) {
2861            div    = document.createElement("div");
2862            div.id = this.dragElId;
2863            var s  = div.style;
2864
2865            s.position   = "absolute";
2866            s.visibility = "hidden";
2867            s.cursor     = "move";
2868            s.border     = "2px solid #aaa";
2869            s.zIndex     = 999;
2870
2871            // appendChild can blow up IE if invoked prior to the window load event
2872            // while rendering a table.  It is possible there are other scenarios
2873            // that would cause this to happen as well.
2874            body.insertBefore(div, body.firstChild);
2875        }
2876    },
2877
2878    /**
2879     * Initialization for the drag frame element.  Must be called in the
2880     * constructor of all subclasses
2881     * @method initFrame
2882     */
2883    initFrame: function() {
2884        this.createFrame();
2885    },
2886
2887    applyConfig: function() {
2888        Ext.dd.DDProxy.superclass.applyConfig.call(this);
2889
2890        this.resizeFrame = (this.config.resizeFrame !== false);
2891        this.centerFrame = (this.config.centerFrame);
2892        this.setDragElId(this.config.dragElId || Ext.dd.DDProxy.dragElId);
2893    },
2894
2895    /**
2896     * Resizes the drag frame to the dimensions of the clicked object, positions
2897     * it over the object, and finally displays it
2898     * @method showFrame
2899     * @param {int} iPageX X click position
2900     * @param {int} iPageY Y click position
2901     * @private
2902     */
2903    showFrame: function(iPageX, iPageY) {
2904        var el = this.getEl();
2905        var dragEl = this.getDragEl();
2906        var s = dragEl.style;
2907
2908        this._resizeProxy();
2909
2910        if (this.centerFrame) {
2911            this.setDelta( Math.round(parseInt(s.width,  10)/2),
2912                           Math.round(parseInt(s.height, 10)/2) );
2913        }
2914
2915        this.setDragElPos(iPageX, iPageY);
2916
2917        Ext.fly(dragEl).show();
2918    },
2919
2920    /**
2921     * The proxy is automatically resized to the dimensions of the linked
2922     * element when a drag is initiated, unless resizeFrame is set to false
2923     * @method _resizeProxy
2924     * @private
2925     */
2926    _resizeProxy: function() {
2927        if (this.resizeFrame) {
2928            var el = this.getEl();
2929            Ext.fly(this.getDragEl()).setSize(el.offsetWidth, el.offsetHeight);
2930        }
2931    },
2932
2933    // overrides Ext.dd.DragDrop
2934    b4MouseDown: function(e) {
2935        var x = e.getPageX();
2936        var y = e.getPageY();
2937        this.autoOffset(x, y);
2938        this.setDragElPos(x, y);
2939    },
2940
2941    // overrides Ext.dd.DragDrop
2942    b4StartDrag: function(x, y) {
2943        // show the drag frame
2944        this.showFrame(x, y);
2945    },
2946
2947    // overrides Ext.dd.DragDrop
2948    b4EndDrag: function(e) {
2949        Ext.fly(this.getDragEl()).hide();
2950    },
2951
2952    // overrides Ext.dd.DragDrop
2953    // By default we try to move the element to the last location of the frame.
2954    // This is so that the default behavior mirrors that of Ext.dd.DD.
2955    endDrag: function(e) {
2956
2957        var lel = this.getEl();
2958        var del = this.getDragEl();
2959
2960        // Show the drag frame briefly so we can get its position
2961        del.style.visibility = "";
2962
2963        this.beforeMove();
2964        // Hide the linked element before the move to get around a Safari
2965        // rendering bug.
2966        lel.style.visibility = "hidden";
2967        Ext.dd.DDM.moveToEl(lel, del);
2968        del.style.visibility = "hidden";
2969        lel.style.visibility = "";
2970
2971        this.afterDrag();
2972    },
2973
2974    beforeMove : function(){
2975
2976    },
2977
2978    afterDrag : function(){
2979
2980    },
2981
2982    toString: function() {
2983        return ("DDProxy " + this.id);
2984    }
2985
2986});
2987/**
2988 * @class Ext.dd.DDTarget
2989 * A DragDrop implementation that does not move, but can be a drop
2990 * target.  You would get the same result by simply omitting implementation
2991 * for the event callbacks, but this way we reduce the processing cost of the
2992 * event listener and the callbacks.
2993 * @extends Ext.dd.DragDrop
2994 * @constructor
2995 * @param {String} id the id of the element that is a drop target
2996 * @param {String} sGroup the group of related DragDrop objects
2997 * @param {object} config an object containing configurable attributes
2998 *                 Valid properties for DDTarget in addition to those in
2999 *                 DragDrop:
3000 *                    none
3001 */
3002Ext.dd.DDTarget = function(id, sGroup, config) {
3003    if (id) {
3004        this.initTarget(id, sGroup, config);
3005    }
3006};
3007
3008// Ext.dd.DDTarget.prototype = new Ext.dd.DragDrop();
3009Ext.extend(Ext.dd.DDTarget, Ext.dd.DragDrop, {
3010    /**
3011     * @hide
3012     * Overridden and disabled. A DDTarget does not support being dragged.
3013     * @method
3014     */
3015    getDragEl: Ext.emptyFn,
3016    /**
3017     * @hide
3018     * Overridden and disabled. A DDTarget does not support being dragged.
3019     * @method
3020     */
3021    isValidHandleChild: Ext.emptyFn,
3022    /**
3023     * @hide
3024     * Overridden and disabled. A DDTarget does not support being dragged.
3025     * @method
3026     */
3027    startDrag: Ext.emptyFn,
3028    /**
3029     * @hide
3030     * Overridden and disabled. A DDTarget does not support being dragged.
3031     * @method
3032     */
3033    endDrag: Ext.emptyFn,
3034    /**
3035     * @hide
3036     * Overridden and disabled. A DDTarget does not support being dragged.
3037     * @method
3038     */
3039    onDrag: Ext.emptyFn,
3040    /**
3041     * @hide
3042     * Overridden and disabled. A DDTarget does not support being dragged.
3043     * @method
3044     */
3045    onDragDrop: Ext.emptyFn,
3046    /**
3047     * @hide
3048     * Overridden and disabled. A DDTarget does not support being dragged.
3049     * @method
3050     */
3051    onDragEnter: Ext.emptyFn,
3052    /**
3053     * @hide
3054     * Overridden and disabled. A DDTarget does not support being dragged.
3055     * @method
3056     */
3057    onDragOut: Ext.emptyFn,
3058    /**
3059     * @hide
3060     * Overridden and disabled. A DDTarget does not support being dragged.
3061     * @method
3062     */
3063    onDragOver: Ext.emptyFn,
3064    /**
3065     * @hide
3066     * Overridden and disabled. A DDTarget does not support being dragged.
3067     * @method
3068     */
3069    onInvalidDrop: Ext.emptyFn,
3070    /**
3071     * @hide
3072     * Overridden and disabled. A DDTarget does not support being dragged.
3073     * @method
3074     */
3075    onMouseDown: Ext.emptyFn,
3076    /**
3077     * @hide
3078     * Overridden and disabled. A DDTarget does not support being dragged.
3079     * @method
3080     */
3081    onMouseUp: Ext.emptyFn,
3082    /**
3083     * @hide
3084     * Overridden and disabled. A DDTarget does not support being dragged.
3085     * @method
3086     */
3087    setXConstraint: Ext.emptyFn,
3088    /**
3089     * @hide
3090     * Overridden and disabled. A DDTarget does not support being dragged.
3091     * @method
3092     */
3093    setYConstraint: Ext.emptyFn,
3094    /**
3095     * @hide
3096     * Overridden and disabled. A DDTarget does not support being dragged.
3097     * @method
3098     */
3099    resetConstraints: Ext.emptyFn,
3100    /**
3101     * @hide
3102     * Overridden and disabled. A DDTarget does not support being dragged.
3103     * @method
3104     */
3105    clearConstraints: Ext.emptyFn,
3106    /**
3107     * @hide
3108     * Overridden and disabled. A DDTarget does not support being dragged.
3109     * @method
3110     */
3111    clearTicks: Ext.emptyFn,
3112    /**
3113     * @hide
3114     * Overridden and disabled. A DDTarget does not support being dragged.
3115     * @method
3116     */
3117    setInitPosition: Ext.emptyFn,
3118    /**
3119     * @hide
3120     * Overridden and disabled. A DDTarget does not support being dragged.
3121     * @method
3122     */
3123    setDragElId: Ext.emptyFn,
3124    /**
3125     * @hide
3126     * Overridden and disabled. A DDTarget does not support being dragged.
3127     * @method
3128     */
3129    setHandleElId: Ext.emptyFn,
3130    /**
3131     * @hide
3132     * Overridden and disabled. A DDTarget does not support being dragged.
3133     * @method
3134     */
3135    setOuterHandleElId: Ext.emptyFn,
3136    /**
3137     * @hide
3138     * Overridden and disabled. A DDTarget does not support being dragged.
3139     * @method
3140     */
3141    addInvalidHandleClass: Ext.emptyFn,
3142    /**
3143     * @hide
3144     * Overridden and disabled. A DDTarget does not support being dragged.
3145     * @method
3146     */
3147    addInvalidHandleId: Ext.emptyFn,
3148    /**
3149     * @hide
3150     * Overridden and disabled. A DDTarget does not support being dragged.
3151     * @method
3152     */
3153    addInvalidHandleType: Ext.emptyFn,
3154    /**
3155     * @hide
3156     * Overridden and disabled. A DDTarget does not support being dragged.
3157     * @method
3158     */
3159    removeInvalidHandleClass: Ext.emptyFn,
3160    /**
3161     * @hide
3162     * Overridden and disabled. A DDTarget does not support being dragged.
3163     * @method
3164     */
3165    removeInvalidHandleId: Ext.emptyFn,
3166    /**
3167     * @hide
3168     * Overridden and disabled. A DDTarget does not support being dragged.
3169     * @method
3170     */
3171    removeInvalidHandleType: Ext.emptyFn,
3172
3173    toString: function() {
3174        return ("DDTarget " + this.id);
3175    }
3176});/**
3177 * @class Ext.dd.DragTracker
3178 * @extends Ext.util.Observable
3179 * A DragTracker listens for drag events on an Element and fires events at the start and end of the drag,
3180 * as well as during the drag. This is useful for components such as {@link Ext.slider.MultiSlider}, where there is
3181 * an element that can be dragged around to change the Slider's value.
3182 * DragTracker provides a series of template methods that should be overridden to provide functionality
3183 * in response to detected drag operations. These are onBeforeStart, onStart, onDrag and onEnd.
3184 * See {@link Ext.slider.MultiSlider}'s initEvents function for an example implementation.
3185 */
3186Ext.dd.DragTracker = Ext.extend(Ext.util.Observable,  {   
3187    /**
3188     * @cfg {Boolean} active
3189         * Defaults to <tt>false</tt>.
3190         */     
3191    active: false,
3192    /**
3193     * @cfg {Number} tolerance
3194         * Number of pixels the drag target must be moved before dragging is considered to have started. Defaults to <tt>5</tt>.
3195         */     
3196    tolerance: 5,
3197    /**
3198     * @cfg {Boolean/Number} autoStart
3199         * Defaults to <tt>false</tt>. Specify <tt>true</tt> to defer trigger start by 1000 ms.
3200         * Specify a Number for the number of milliseconds to defer trigger start.
3201         */     
3202    autoStart: false,
3203   
3204    constructor : function(config){
3205        Ext.apply(this, config);
3206            this.addEvents(
3207                /**
3208                 * @event mousedown
3209                 * @param {Object} this
3210                 * @param {Object} e event object
3211                 */
3212                'mousedown',
3213                /**
3214                 * @event mouseup
3215                 * @param {Object} this
3216                 * @param {Object} e event object
3217                 */
3218                'mouseup',
3219                /**
3220                 * @event mousemove
3221                 * @param {Object} this
3222                 * @param {Object} e event object
3223                 */
3224                'mousemove',
3225                /**
3226                 * @event dragstart
3227                 * @param {Object} this
3228                 * @param {Object} e event object
3229                 */
3230                'dragstart',
3231                /**
3232                 * @event dragend
3233                 * @param {Object} this
3234                 * @param {Object} e event object
3235                 */
3236                'dragend',
3237                /**
3238                 * @event drag
3239                 * @param {Object} this
3240                 * @param {Object} e event object
3241                 */
3242                'drag'
3243            );
3244       
3245            this.dragRegion = new Ext.lib.Region(0,0,0,0);
3246       
3247            if(this.el){
3248                this.initEl(this.el);
3249            }
3250        Ext.dd.DragTracker.superclass.constructor.call(this, config);
3251    },
3252
3253    initEl: function(el){
3254        this.el = Ext.get(el);
3255        el.on('mousedown', this.onMouseDown, this,
3256                this.delegate ? {delegate: this.delegate} : undefined);
3257    },
3258
3259    destroy : function(){
3260        this.el.un('mousedown', this.onMouseDown, this);
3261        delete this.el;
3262    },
3263
3264    onMouseDown: function(e, target){
3265        if(this.fireEvent('mousedown', this, e) !== false && this.onBeforeStart(e) !== false){
3266            this.startXY = this.lastXY = e.getXY();
3267            this.dragTarget = this.delegate ? target : this.el.dom;
3268            if(this.preventDefault !== false){
3269                e.preventDefault();
3270            }
3271            Ext.getDoc().on({
3272                scope: this,
3273                mouseup: this.onMouseUp,
3274                mousemove: this.onMouseMove,
3275                selectstart: this.stopSelect
3276            });
3277            if(this.autoStart){
3278                this.timer = this.triggerStart.defer(this.autoStart === true ? 1000 : this.autoStart, this, [e]);
3279            }
3280        }
3281    },
3282
3283    onMouseMove: function(e, target){
3284        // HACK: IE hack to see if button was released outside of window. */
3285        if(this.active && Ext.isIE && !e.browserEvent.button){
3286            e.preventDefault();
3287            this.onMouseUp(e);
3288            return;
3289        }
3290
3291        e.preventDefault();
3292        var xy = e.getXY(), s = this.startXY;
3293        this.lastXY = xy;
3294        if(!this.active){
3295            if(Math.abs(s[0]-xy[0]) > this.tolerance || Math.abs(s[1]-xy[1]) > this.tolerance){
3296                this.triggerStart(e);
3297            }else{
3298                return;
3299            }
3300        }
3301        this.fireEvent('mousemove', this, e);
3302        this.onDrag(e);
3303        this.fireEvent('drag', this, e);
3304    },
3305
3306    onMouseUp: function(e) {
3307        var doc = Ext.getDoc(),
3308            wasActive = this.active;
3309           
3310        doc.un('mousemove', this.onMouseMove, this);
3311        doc.un('mouseup', this.onMouseUp, this);
3312        doc.un('selectstart', this.stopSelect, this);
3313        e.preventDefault();
3314        this.clearStart();
3315        this.active = false;
3316        delete this.elRegion;
3317        this.fireEvent('mouseup', this, e);
3318        if(wasActive){
3319            this.onEnd(e);
3320            this.fireEvent('dragend', this, e);
3321        }
3322    },
3323
3324    triggerStart: function(e) {
3325        this.clearStart();
3326        this.active = true;
3327        this.onStart(e);
3328        this.fireEvent('dragstart', this, e);
3329    },
3330
3331    clearStart : function() {
3332        if(this.timer){
3333            clearTimeout(this.timer);
3334            delete this.timer;
3335        }
3336    },
3337
3338    stopSelect : function(e) {
3339        e.stopEvent();
3340        return false;
3341    },
3342   
3343    /**
3344     * Template method which should be overridden by each DragTracker instance. Called when the user first clicks and
3345     * holds the mouse button down. Return false to disallow the drag
3346     * @param {Ext.EventObject} e The event object
3347     */
3348    onBeforeStart : function(e) {
3349
3350    },
3351
3352    /**
3353     * Template method which should be overridden by each DragTracker instance. Called when a drag operation starts
3354     * (e.g. the user has moved the tracked element beyond the specified tolerance)
3355     * @param {Ext.EventObject} e The event object
3356     */
3357    onStart : function(xy) {
3358
3359    },
3360
3361    /**
3362     * Template method which should be overridden by each DragTracker instance. Called whenever a drag has been detected.
3363     * @param {Ext.EventObject} e The event object
3364     */
3365    onDrag : function(e) {
3366
3367    },
3368
3369    /**
3370     * Template method which should be overridden by each DragTracker instance. Called when a drag operation has been completed
3371     * (e.g. the user clicked and held the mouse down, dragged the element and then released the mouse button)
3372     * @param {Ext.EventObject} e The event object
3373     */
3374    onEnd : function(e) {
3375
3376    },
3377
3378    /**
3379     * Returns the drag target
3380     * @return {Ext.Element} The element currently being tracked
3381     */
3382    getDragTarget : function(){
3383        return this.dragTarget;
3384    },
3385
3386    getDragCt : function(){
3387        return this.el;
3388    },
3389
3390    getXY : function(constrain){
3391        return constrain ?
3392               this.constrainModes[constrain].call(this, this.lastXY) : this.lastXY;
3393    },
3394
3395    getOffset : function(constrain){
3396        var xy = this.getXY(constrain),
3397            s = this.startXY;
3398        return [s[0]-xy[0], s[1]-xy[1]];
3399    },
3400
3401    constrainModes: {
3402        'point' : function(xy){
3403
3404            if(!this.elRegion){
3405                this.elRegion = this.getDragCt().getRegion();
3406            }
3407
3408            var dr = this.dragRegion;
3409
3410            dr.left = xy[0];
3411            dr.top = xy[1];
3412            dr.right = xy[0];
3413            dr.bottom = xy[1];
3414
3415            dr.constrainTo(this.elRegion);
3416
3417            return [dr.left, dr.top];
3418        }
3419    }
3420});/**
3421 * @class Ext.dd.ScrollManager
3422 * <p>Provides automatic scrolling of overflow regions in the page during drag operations.</p>
3423 * <p>The ScrollManager configs will be used as the defaults for any scroll container registered with it,
3424 * but you can also override most of the configs per scroll container by adding a
3425 * <tt>ddScrollConfig</tt> object to the target element that contains these properties: {@link #hthresh},
3426 * {@link #vthresh}, {@link #increment} and {@link #frequency}.  Example usage:
3427 * <pre><code>
3428var el = Ext.get('scroll-ct');
3429el.ddScrollConfig = {
3430    vthresh: 50,
3431    hthresh: -1,
3432    frequency: 100,
3433    increment: 200
3434};
3435Ext.dd.ScrollManager.register(el);
3436</code></pre>
3437 * <b>Note: This class uses "Point Mode" and is untested in "Intersect Mode".</b>
3438 * @singleton
3439 */
3440Ext.dd.ScrollManager = function(){
3441    var ddm = Ext.dd.DragDropMgr;
3442    var els = {};
3443    var dragEl = null;
3444    var proc = {};
3445   
3446    var onStop = function(e){
3447        dragEl = null;
3448        clearProc();
3449    };
3450   
3451    var triggerRefresh = function(){
3452        if(ddm.dragCurrent){
3453             ddm.refreshCache(ddm.dragCurrent.groups);
3454        }
3455    };
3456   
3457    var doScroll = function(){
3458        if(ddm.dragCurrent){
3459            var dds = Ext.dd.ScrollManager;
3460            var inc = proc.el.ddScrollConfig ?
3461                      proc.el.ddScrollConfig.increment : dds.increment;
3462            if(!dds.animate){
3463                if(proc.el.scroll(proc.dir, inc)){
3464                    triggerRefresh();
3465                }
3466            }else{
3467                proc.el.scroll(proc.dir, inc, true, dds.animDuration, triggerRefresh);
3468            }
3469        }
3470    };
3471   
3472    var clearProc = function(){
3473        if(proc.id){
3474            clearInterval(proc.id);
3475        }
3476        proc.id = 0;
3477        proc.el = null;
3478        proc.dir = "";
3479    };
3480
3481    var startProc = function(el, dir){
3482        clearProc();
3483        proc.el = el;
3484        proc.dir = dir;
3485        var group = el.ddScrollConfig ? el.ddScrollConfig.ddGroup : undefined,
3486            freq  = (el.ddScrollConfig && el.ddScrollConfig.frequency)
3487                  ? el.ddScrollConfig.frequency
3488                  : Ext.dd.ScrollManager.frequency;
3489
3490        if (group === undefined || ddm.dragCurrent.ddGroup == group) {
3491            proc.id = setInterval(doScroll, freq);
3492        }
3493    };
3494   
3495    var onFire = function(e, isDrop){
3496        if(isDrop || !ddm.dragCurrent){ return; }
3497        var dds = Ext.dd.ScrollManager;
3498        if(!dragEl || dragEl != ddm.dragCurrent){
3499            dragEl = ddm.dragCurrent;
3500            // refresh regions on drag start
3501            dds.refreshCache();
3502        }
3503       
3504        var xy = Ext.lib.Event.getXY(e);
3505        var pt = new Ext.lib.Point(xy[0], xy[1]);
3506        for(var id in els){
3507            var el = els[id], r = el._region;
3508            var c = el.ddScrollConfig ? el.ddScrollConfig : dds;
3509            if(r && r.contains(pt) && el.isScrollable()){
3510                if(r.bottom - pt.y <= c.vthresh){
3511                    if(proc.el != el){
3512                        startProc(el, "down");
3513                    }
3514                    return;
3515                }else if(r.right - pt.x <= c.hthresh){
3516                    if(proc.el != el){
3517                        startProc(el, "left");
3518                    }
3519                    return;
3520                }else if(pt.y - r.top <= c.vthresh){
3521                    if(proc.el != el){
3522                        startProc(el, "up");
3523                    }
3524                    return;
3525                }else if(pt.x - r.left <= c.hthresh){
3526                    if(proc.el != el){
3527                        startProc(el, "right");
3528                    }
3529                    return;
3530                }
3531            }
3532        }
3533        clearProc();
3534    };
3535   
3536    ddm.fireEvents = ddm.fireEvents.createSequence(onFire, ddm);
3537    ddm.stopDrag = ddm.stopDrag.createSequence(onStop, ddm);
3538   
3539    return {
3540        /**
3541         * Registers new overflow element(s) to auto scroll
3542         * @param {Mixed/Array} el The id of or the element to be scrolled or an array of either
3543         */
3544        register : function(el){
3545            if(Ext.isArray(el)){
3546                for(var i = 0, len = el.length; i < len; i++) {
3547                        this.register(el[i]);
3548                }
3549            }else{
3550                el = Ext.get(el);
3551                els[el.id] = el;
3552            }
3553        },
3554       
3555        /**
3556         * Unregisters overflow element(s) so they are no longer scrolled
3557         * @param {Mixed/Array} el The id of or the element to be removed or an array of either
3558         */
3559        unregister : function(el){
3560            if(Ext.isArray(el)){
3561                for(var i = 0, len = el.length; i < len; i++) {
3562                        this.unregister(el[i]);
3563                }
3564            }else{
3565                el = Ext.get(el);
3566                delete els[el.id];
3567            }
3568        },
3569       
3570        /**
3571         * The number of pixels from the top or bottom edge of a container the pointer needs to be to
3572         * trigger scrolling (defaults to 25)
3573         * @type Number
3574         */
3575        vthresh : 25,
3576        /**
3577         * The number of pixels from the right or left edge of a container the pointer needs to be to
3578         * trigger scrolling (defaults to 25)
3579         * @type Number
3580         */
3581        hthresh : 25,
3582
3583        /**
3584         * The number of pixels to scroll in each scroll increment (defaults to 100)
3585         * @type Number
3586         */
3587        increment : 100,
3588       
3589        /**
3590         * The frequency of scrolls in milliseconds (defaults to 500)
3591         * @type Number
3592         */
3593        frequency : 500,
3594       
3595        /**
3596         * True to animate the scroll (defaults to true)
3597         * @type Boolean
3598         */
3599        animate: true,
3600       
3601        /**
3602         * The animation duration in seconds -
3603         * MUST BE less than Ext.dd.ScrollManager.frequency! (defaults to .4)
3604         * @type Number
3605         */
3606        animDuration: .4,
3607       
3608        /**
3609         * The named drag drop {@link Ext.dd.DragSource#ddGroup group} to which this container belongs (defaults to undefined).
3610         * If a ddGroup is specified, then container scrolling will only occur when a dragged object is in the same ddGroup.
3611         * @type String
3612         */
3613        ddGroup: undefined,
3614       
3615        /**
3616         * Manually trigger a cache refresh.
3617         */
3618        refreshCache : function(){
3619            for(var id in els){
3620                if(typeof els[id] == 'object'){ // for people extending the object prototype
3621                    els[id]._region = els[id].getRegion();
3622                }
3623            }
3624        }
3625    };
3626}();/**
3627 * @class Ext.dd.Registry
3628 * Provides easy access to all drag drop components that are registered on a page.  Items can be retrieved either
3629 * directly by DOM node id, or by passing in the drag drop event that occurred and looking up the event target.
3630 * @singleton
3631 */
3632Ext.dd.Registry = function(){
3633    var elements = {}; 
3634    var handles = {}; 
3635    var autoIdSeed = 0;
3636
3637    var getId = function(el, autogen){
3638        if(typeof el == "string"){
3639            return el;
3640        }
3641        var id = el.id;
3642        if(!id && autogen !== false){
3643            id = "extdd-" + (++autoIdSeed);
3644            el.id = id;
3645        }
3646        return id;
3647    };
3648   
3649    return {
3650    /**
3651     * Resgister a drag drop element
3652     * @param {String/HTMLElement} element The id or DOM node to register
3653     * @param {Object} data (optional) An custom data object that will be passed between the elements that are involved
3654     * in drag drop operations.  You can populate this object with any arbitrary properties that your own code
3655     * knows how to interpret, plus there are some specific properties known to the Registry that should be
3656     * populated in the data object (if applicable):
3657     * <pre>
3658Value      Description<br />
3659---------  ------------------------------------------<br />
3660handles    Array of DOM nodes that trigger dragging<br />
3661           for the element being registered<br />
3662isHandle   True if the element passed in triggers<br />
3663           dragging itself, else false
3664</pre>
3665     */
3666        register : function(el, data){
3667            data = data || {};
3668            if(typeof el == "string"){
3669                el = document.getElementById(el);
3670            }
3671            data.ddel = el;
3672            elements[getId(el)] = data;
3673            if(data.isHandle !== false){
3674                handles[data.ddel.id] = data;
3675            }
3676            if(data.handles){
3677                var hs = data.handles;
3678                for(var i = 0, len = hs.length; i < len; i++){
3679                        handles[getId(hs[i])] = data;
3680                }
3681            }
3682        },
3683
3684    /**
3685     * Unregister a drag drop element
3686     * @param {String/HTMLElement} element The id or DOM node to unregister
3687     */
3688        unregister : function(el){
3689            var id = getId(el, false);
3690            var data = elements[id];
3691            if(data){
3692                delete elements[id];
3693                if(data.handles){
3694                    var hs = data.handles;
3695                    for(var i = 0, len = hs.length; i < len; i++){
3696                        delete handles[getId(hs[i], false)];
3697                    }
3698                }
3699            }
3700        },
3701
3702    /**
3703     * Returns the handle registered for a DOM Node by id
3704     * @param {String/HTMLElement} id The DOM node or id to look up
3705     * @return {Object} handle The custom handle data
3706     */
3707        getHandle : function(id){
3708            if(typeof id != "string"){ // must be element?
3709                id = id.id;
3710            }
3711            return handles[id];
3712        },
3713
3714    /**
3715     * Returns the handle that is registered for the DOM node that is the target of the event
3716     * @param {Event} e The event
3717     * @return {Object} handle The custom handle data
3718     */
3719        getHandleFromEvent : function(e){
3720            var t = Ext.lib.Event.getTarget(e);
3721            return t ? handles[t.id] : null;
3722        },
3723
3724    /**
3725     * Returns a custom data object that is registered for a DOM node by id
3726     * @param {String/HTMLElement} id The DOM node or id to look up
3727     * @return {Object} data The custom data
3728     */
3729        getTarget : function(id){
3730            if(typeof id != "string"){ // must be element?
3731                id = id.id;
3732            }
3733            return elements[id];
3734        },
3735
3736    /**
3737     * Returns a custom data object that is registered for the DOM node that is the target of the event
3738     * @param {Event} e The event
3739     * @return {Object} data The custom data
3740     */
3741        getTargetFromEvent : function(e){
3742            var t = Ext.lib.Event.getTarget(e);
3743            return t ? elements[t.id] || handles[t.id] : null;
3744        }
3745    };
3746}();/**
3747 * @class Ext.dd.StatusProxy
3748 * A specialized drag proxy that supports a drop status icon, {@link Ext.Layer} styles and auto-repair.  This is the
3749 * default drag proxy used by all Ext.dd components.
3750 * @constructor
3751 * @param {Object} config
3752 */
3753Ext.dd.StatusProxy = function(config){
3754    Ext.apply(this, config);
3755    this.id = this.id || Ext.id();
3756    this.el = new Ext.Layer({
3757        dh: {
3758            id: this.id, tag: "div", cls: "x-dd-drag-proxy "+this.dropNotAllowed, children: [
3759                {tag: "div", cls: "x-dd-drop-icon"},
3760                {tag: "div", cls: "x-dd-drag-ghost"}
3761            ]
3762        }, 
3763        shadow: !config || config.shadow !== false
3764    });
3765    this.ghost = Ext.get(this.el.dom.childNodes[1]);
3766    this.dropStatus = this.dropNotAllowed;
3767};
3768
3769Ext.dd.StatusProxy.prototype = {
3770    /**
3771     * @cfg {String} dropAllowed
3772     * The CSS class to apply to the status element when drop is allowed (defaults to "x-dd-drop-ok").
3773     */
3774    dropAllowed : "x-dd-drop-ok",
3775    /**
3776     * @cfg {String} dropNotAllowed
3777     * The CSS class to apply to the status element when drop is not allowed (defaults to "x-dd-drop-nodrop").
3778     */
3779    dropNotAllowed : "x-dd-drop-nodrop",
3780
3781    /**
3782     * Updates the proxy's visual element to indicate the status of whether or not drop is allowed
3783     * over the current target element.
3784     * @param {String} cssClass The css class for the new drop status indicator image
3785     */
3786    setStatus : function(cssClass){
3787        cssClass = cssClass || this.dropNotAllowed;
3788        if(this.dropStatus != cssClass){
3789            this.el.replaceClass(this.dropStatus, cssClass);
3790            this.dropStatus = cssClass;
3791        }
3792    },
3793
3794    /**
3795     * Resets the status indicator to the default dropNotAllowed value
3796     * @param {Boolean} clearGhost True to also remove all content from the ghost, false to preserve it
3797     */
3798    reset : function(clearGhost){
3799        this.el.dom.className = "x-dd-drag-proxy " + this.dropNotAllowed;
3800        this.dropStatus = this.dropNotAllowed;
3801        if(clearGhost){
3802            this.ghost.update("");
3803        }
3804    },
3805
3806    /**
3807     * Updates the contents of the ghost element
3808     * @param {String/HTMLElement} html The html that will replace the current innerHTML of the ghost element, or a
3809     * DOM node to append as the child of the ghost element (in which case the innerHTML will be cleared first).
3810     */
3811    update : function(html){
3812        if(typeof html == "string"){
3813            this.ghost.update(html);
3814        }else{
3815            this.ghost.update("");
3816            html.style.margin = "0";
3817            this.ghost.dom.appendChild(html);
3818        }
3819        var el = this.ghost.dom.firstChild; 
3820        if(el){
3821            Ext.fly(el).setStyle('float', 'none');
3822        }
3823    },
3824
3825    /**
3826     * Returns the underlying proxy {@link Ext.Layer}
3827     * @return {Ext.Layer} el
3828    */
3829    getEl : function(){
3830        return this.el;
3831    },
3832
3833    /**
3834     * Returns the ghost element
3835     * @return {Ext.Element} el
3836     */
3837    getGhost : function(){
3838        return this.ghost;
3839    },
3840
3841    /**
3842     * Hides the proxy
3843     * @param {Boolean} clear True to reset the status and clear the ghost contents, false to preserve them
3844     */
3845    hide : function(clear){
3846        this.el.hide();
3847        if(clear){
3848            this.reset(true);
3849        }
3850    },
3851
3852    /**
3853     * Stops the repair animation if it's currently running
3854     */
3855    stop : function(){
3856        if(this.anim && this.anim.isAnimated && this.anim.isAnimated()){
3857            this.anim.stop();
3858        }
3859    },
3860
3861    /**
3862     * Displays this proxy
3863     */
3864    show : function(){
3865        this.el.show();
3866    },
3867
3868    /**
3869     * Force the Layer to sync its shadow and shim positions to the element
3870     */
3871    sync : function(){
3872        this.el.sync();
3873    },
3874
3875    /**
3876     * Causes the proxy to return to its position of origin via an animation.  Should be called after an
3877     * invalid drop operation by the item being dragged.
3878     * @param {Array} xy The XY position of the element ([x, y])
3879     * @param {Function} callback The function to call after the repair is complete.
3880     * @param {Object} scope The scope (<code>this</code> reference) in which the callback function is executed. Defaults to the browser window.
3881     */
3882    repair : function(xy, callback, scope){
3883        this.callback = callback;
3884        this.scope = scope;
3885        if(xy && this.animRepair !== false){
3886            this.el.addClass("x-dd-drag-repair");
3887            this.el.hideUnders(true);
3888            this.anim = this.el.shift({
3889                duration: this.repairDuration || .5,
3890                easing: 'easeOut',
3891                xy: xy,
3892                stopFx: true,
3893                callback: this.afterRepair,
3894                scope: this
3895            });
3896        }else{
3897            this.afterRepair();
3898        }
3899    },
3900
3901    // private
3902    afterRepair : function(){
3903        this.hide(true);
3904        if(typeof this.callback == "function"){
3905            this.callback.call(this.scope || this);
3906        }
3907        this.callback = null;
3908        this.scope = null;
3909    },
3910   
3911    destroy: function(){
3912        Ext.destroy(this.ghost, this.el);   
3913    }
3914};/**
3915 * @class Ext.dd.DragSource
3916 * @extends Ext.dd.DDProxy
3917 * A simple class that provides the basic implementation needed to make any element draggable.
3918 * @constructor
3919 * @param {Mixed} el The container element
3920 * @param {Object} config
3921 */
3922Ext.dd.DragSource = function(el, config){
3923    this.el = Ext.get(el);
3924    if(!this.dragData){
3925        this.dragData = {};
3926    }
3927   
3928    Ext.apply(this, config);
3929   
3930    if(!this.proxy){
3931        this.proxy = new Ext.dd.StatusProxy();
3932    }
3933    Ext.dd.DragSource.superclass.constructor.call(this, this.el.dom, this.ddGroup || this.group, 
3934          {dragElId : this.proxy.id, resizeFrame: false, isTarget: false, scroll: this.scroll === true});
3935   
3936    this.dragging = false;
3937};
3938
3939Ext.extend(Ext.dd.DragSource, Ext.dd.DDProxy, {
3940    /**
3941     * @cfg {String} ddGroup
3942     * A named drag drop group to which this object belongs.  If a group is specified, then this object will only
3943     * interact with other drag drop objects in the same group (defaults to undefined).
3944     */
3945    /**
3946     * @cfg {String} dropAllowed
3947     * The CSS class returned to the drag source when drop is allowed (defaults to "x-dd-drop-ok").
3948     */
3949    dropAllowed : "x-dd-drop-ok",
3950    /**
3951     * @cfg {String} dropNotAllowed
3952     * The CSS class returned to the drag source when drop is not allowed (defaults to "x-dd-drop-nodrop").
3953     */
3954    dropNotAllowed : "x-dd-drop-nodrop",
3955
3956    /**
3957     * Returns the data object associated with this drag source
3958     * @return {Object} data An object containing arbitrary data
3959     */
3960    getDragData : function(e){
3961        return this.dragData;
3962    },
3963
3964    // private
3965    onDragEnter : function(e, id){
3966        var target = Ext.dd.DragDropMgr.getDDById(id);
3967        this.cachedTarget = target;
3968        if(this.beforeDragEnter(target, e, id) !== false){
3969            if(target.isNotifyTarget){
3970                var status = target.notifyEnter(this, e, this.dragData);
3971                this.proxy.setStatus(status);
3972            }else{
3973                this.proxy.setStatus(this.dropAllowed);
3974            }
3975           
3976            if(this.afterDragEnter){
3977                /**
3978                 * An empty function by default, but provided so that you can perform a custom action
3979                 * when the dragged item enters the drop target by providing an implementation.
3980                 * @param {Ext.dd.DragDrop} target The drop target
3981                 * @param {Event} e The event object
3982                 * @param {String} id The id of the dragged element
3983                 * @method afterDragEnter
3984                 */
3985                this.afterDragEnter(target, e, id);
3986            }
3987        }
3988    },
3989
3990    /**
3991     * An empty function by default, but provided so that you can perform a custom action
3992     * before the dragged item enters the drop target and optionally cancel the onDragEnter.
3993     * @param {Ext.dd.DragDrop} target The drop target
3994     * @param {Event} e The event object
3995     * @param {String} id The id of the dragged element
3996     * @return {Boolean} isValid True if the drag event is valid, else false to cancel
3997     */
3998    beforeDragEnter : function(target, e, id){
3999        return true;
4000    },
4001
4002    // private
4003    alignElWithMouse: function() {
4004        Ext.dd.DragSource.superclass.alignElWithMouse.apply(this, arguments);
4005        this.proxy.sync();
4006    },
4007
4008    // private
4009    onDragOver : function(e, id){
4010        var target = this.cachedTarget || Ext.dd.DragDropMgr.getDDById(id);
4011        if(this.beforeDragOver(target, e, id) !== false){
4012            if(target.isNotifyTarget){
4013                var status = target.notifyOver(this, e, this.dragData);
4014                this.proxy.setStatus(status);
4015            }
4016
4017            if(this.afterDragOver){
4018                /**
4019                 * An empty function by default, but provided so that you can perform a custom action
4020                 * while the dragged item is over the drop target by providing an implementation.
4021                 * @param {Ext.dd.DragDrop} target The drop target
4022                 * @param {Event} e The event object
4023                 * @param {String} id The id of the dragged element
4024                 * @method afterDragOver
4025                 */
4026                this.afterDragOver(target, e, id);
4027            }
4028        }
4029    },
4030
4031    /**
4032     * An empty function by default, but provided so that you can perform a custom action
4033     * while the dragged item is over the drop target and optionally cancel the onDragOver.
4034     * @param {Ext.dd.DragDrop} target The drop target
4035     * @param {Event} e The event object
4036     * @param {String} id The id of the dragged element
4037     * @return {Boolean} isValid True if the drag event is valid, else false to cancel
4038     */
4039    beforeDragOver : function(target, e, id){
4040        return true;
4041    },
4042
4043    // private
4044    onDragOut : function(e, id){
4045        var target = this.cachedTarget || Ext.dd.DragDropMgr.getDDById(id);
4046        if(this.beforeDragOut(target, e, id) !== false){
4047            if(target.isNotifyTarget){
4048                target.notifyOut(this, e, this.dragData);
4049            }
4050            this.proxy.reset();
4051            if(this.afterDragOut){
4052                /**
4053                 * An empty function by default, but provided so that you can perform a custom action
4054                 * after the dragged item is dragged out of the target without dropping.
4055                 * @param {Ext.dd.DragDrop} target The drop target
4056                 * @param {Event} e The event object
4057                 * @param {String} id The id of the dragged element
4058                 * @method afterDragOut
4059                 */
4060                this.afterDragOut(target, e, id);
4061            }
4062        }
4063        this.cachedTarget = null;
4064    },
4065
4066    /**
4067     * An empty function by default, but provided so that you can perform a custom action before the dragged
4068     * item is dragged out of the target without dropping, and optionally cancel the onDragOut.
4069     * @param {Ext.dd.DragDrop} target The drop target
4070     * @param {Event} e The event object
4071     * @param {String} id The id of the dragged element
4072     * @return {Boolean} isValid True if the drag event is valid, else false to cancel
4073     */
4074    beforeDragOut : function(target, e, id){
4075        return true;
4076    },
4077   
4078    // private
4079    onDragDrop : function(e, id){
4080        var target = this.cachedTarget || Ext.dd.DragDropMgr.getDDById(id);
4081        if(this.beforeDragDrop(target, e, id) !== false){
4082            if(target.isNotifyTarget){
4083                if(target.notifyDrop(this, e, this.dragData)){ // valid drop?
4084                    this.onValidDrop(target, e, id);
4085                }else{
4086                    this.onInvalidDrop(target, e, id);
4087                }
4088            }else{
4089                this.onValidDrop(target, e, id);
4090            }
4091           
4092            if(this.afterDragDrop){
4093                /**
4094                 * An empty function by default, but provided so that you can perform a custom action
4095                 * after a valid drag drop has occurred by providing an implementation.
4096                 * @param {Ext.dd.DragDrop} target The drop target
4097                 * @param {Event} e The event object
4098                 * @param {String} id The id of the dropped element
4099                 * @method afterDragDrop
4100                 */
4101                this.afterDragDrop(target, e, id);
4102            }
4103        }
4104        delete this.cachedTarget;
4105    },
4106
4107    /**
4108     * An empty function by default, but provided so that you can perform a custom action before the dragged
4109     * item is dropped onto the target and optionally cancel the onDragDrop.
4110     * @param {Ext.dd.DragDrop} target The drop target
4111     * @param {Event} e The event object
4112     * @param {String} id The id of the dragged element
4113     * @return {Boolean} isValid True if the drag drop event is valid, else false to cancel
4114     */
4115    beforeDragDrop : function(target, e, id){
4116        return true;
4117    },
4118
4119    // private
4120    onValidDrop : function(target, e, id){
4121        this.hideProxy();
4122        if(this.afterValidDrop){
4123            /**
4124             * An empty function by default, but provided so that you can perform a custom action
4125             * after a valid drop has occurred by providing an implementation.
4126             * @param {Object} target The target DD
4127             * @param {Event} e The event object
4128             * @param {String} id The id of the dropped element
4129             * @method afterInvalidDrop
4130             */
4131            this.afterValidDrop(target, e, id);
4132        }
4133    },
4134
4135    // private
4136    getRepairXY : function(e, data){
4137        return this.el.getXY(); 
4138    },
4139
4140    // private
4141    onInvalidDrop : function(target, e, id){
4142        this.beforeInvalidDrop(target, e, id);
4143        if(this.cachedTarget){
4144            if(this.cachedTarget.isNotifyTarget){
4145                this.cachedTarget.notifyOut(this, e, this.dragData);
4146            }
4147            this.cacheTarget = null;
4148        }
4149        this.proxy.repair(this.getRepairXY(e, this.dragData), this.afterRepair, this);
4150
4151        if(this.afterInvalidDrop){
4152            /**
4153             * An empty function by default, but provided so that you can perform a custom action
4154             * after an invalid drop has occurred by providing an implementation.
4155             * @param {Event} e The event object
4156             * @param {String} id The id of the dropped element
4157             * @method afterInvalidDrop
4158             */
4159            this.afterInvalidDrop(e, id);
4160        }
4161    },
4162
4163    // private
4164    afterRepair : function(){
4165        if(Ext.enableFx){
4166            this.el.highlight(this.hlColor || "c3daf9");
4167        }
4168        this.dragging = false;
4169    },
4170
4171    /**
4172     * An empty function by default, but provided so that you can perform a custom action after an invalid
4173     * drop has occurred.
4174     * @param {Ext.dd.DragDrop} target The drop target
4175     * @param {Event} e The event object
4176     * @param {String} id The id of the dragged element
4177     * @return {Boolean} isValid True if the invalid drop should proceed, else false to cancel
4178     */
4179    beforeInvalidDrop : function(target, e, id){
4180        return true;
4181    },
4182
4183    // private
4184    handleMouseDown : function(e){
4185        if(this.dragging) {
4186            return;
4187        }
4188        var data = this.getDragData(e);
4189        if(data && this.onBeforeDrag(data, e) !== false){
4190            this.dragData = data;
4191            this.proxy.stop();
4192            Ext.dd.DragSource.superclass.handleMouseDown.apply(this, arguments);
4193        } 
4194    },
4195
4196    /**
4197     * An empty function by default, but provided so that you can perform a custom action before the initial
4198     * drag event begins and optionally cancel it.
4199     * @param {Object} data An object containing arbitrary data to be shared with drop targets
4200     * @param {Event} e The event object
4201     * @return {Boolean} isValid True if the drag event is valid, else false to cancel
4202     */
4203    onBeforeDrag : function(data, e){
4204        return true;
4205    },
4206
4207    /**
4208     * An empty function by default, but provided so that you can perform a custom action once the initial
4209     * drag event has begun.  The drag cannot be canceled from this function.
4210     * @param {Number} x The x position of the click on the dragged object
4211     * @param {Number} y The y position of the click on the dragged object
4212     */
4213    onStartDrag : Ext.emptyFn,
4214
4215    // private override
4216    startDrag : function(x, y){
4217        this.proxy.reset();
4218        this.dragging = true;
4219        this.proxy.update("");
4220        this.onInitDrag(x, y);
4221        this.proxy.show();
4222    },
4223
4224    // private
4225    onInitDrag : function(x, y){
4226        var clone = this.el.dom.cloneNode(true);
4227        clone.id = Ext.id(); // prevent duplicate ids
4228        this.proxy.update(clone);
4229        this.onStartDrag(x, y);
4230        return true;
4231    },
4232
4233    /**
4234     * Returns the drag source's underlying {@link Ext.dd.StatusProxy}
4235     * @return {Ext.dd.StatusProxy} proxy The StatusProxy
4236     */
4237    getProxy : function(){
4238        return this.proxy; 
4239    },
4240
4241    /**
4242     * Hides the drag source's {@link Ext.dd.StatusProxy}
4243     */
4244    hideProxy : function(){
4245        this.proxy.hide(); 
4246        this.proxy.reset(true);
4247        this.dragging = false;
4248    },
4249
4250    // private
4251    triggerCacheRefresh : function(){
4252        Ext.dd.DDM.refreshCache(this.groups);
4253    },
4254
4255    // private - override to prevent hiding
4256    b4EndDrag: function(e) {
4257    },
4258
4259    // private - override to prevent moving
4260    endDrag : function(e){
4261        this.onEndDrag(this.dragData, e);
4262    },
4263
4264    // private
4265    onEndDrag : function(data, e){
4266    },
4267   
4268    // private - pin to cursor
4269    autoOffset : function(x, y) {
4270        this.setDelta(-12, -20);
4271    },
4272   
4273    destroy: function(){
4274        Ext.dd.DragSource.superclass.destroy.call(this);
4275        Ext.destroy(this.proxy);
4276    }
4277});/**
4278 * @class Ext.dd.DropTarget
4279 * @extends Ext.dd.DDTarget
4280 * A simple class that provides the basic implementation needed to make any element a drop target that can have
4281 * draggable items dropped onto it.  The drop has no effect until an implementation of notifyDrop is provided.
4282 * @constructor
4283 * @param {Mixed} el The container element
4284 * @param {Object} config
4285 */
4286Ext.dd.DropTarget = Ext.extend(Ext.dd.DDTarget, {
4287   
4288    constructor : function(el, config){
4289        this.el = Ext.get(el);
4290   
4291        Ext.apply(this, config);
4292   
4293        if(this.containerScroll){
4294            Ext.dd.ScrollManager.register(this.el);
4295        }
4296   
4297        Ext.dd.DropTarget.superclass.constructor.call(this, this.el.dom, this.ddGroup || this.group, 
4298              {isTarget: true});       
4299    },
4300   
4301    /**
4302     * @cfg {String} ddGroup
4303     * A named drag drop group to which this object belongs.  If a group is specified, then this object will only
4304     * interact with other drag drop objects in the same group (defaults to undefined).
4305     */
4306    /**
4307     * @cfg {String} overClass
4308     * The CSS class applied to the drop target element while the drag source is over it (defaults to "").
4309     */
4310    /**
4311     * @cfg {String} dropAllowed
4312     * The CSS class returned to the drag source when drop is allowed (defaults to "x-dd-drop-ok").
4313     */
4314    dropAllowed : "x-dd-drop-ok",
4315    /**
4316     * @cfg {String} dropNotAllowed
4317     * The CSS class returned to the drag source when drop is not allowed (defaults to "x-dd-drop-nodrop").
4318     */
4319    dropNotAllowed : "x-dd-drop-nodrop",
4320
4321    // private
4322    isTarget : true,
4323
4324    // private
4325    isNotifyTarget : true,
4326
4327    /**
4328     * The function a {@link Ext.dd.DragSource} calls once to notify this drop target that the source is now over the
4329     * target.  This default implementation adds the CSS class specified by overClass (if any) to the drop element
4330     * and returns the dropAllowed config value.  This method should be overridden if drop validation is required.
4331     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
4332     * @param {Event} e The event
4333     * @param {Object} data An object containing arbitrary data supplied by the drag source
4334     * @return {String} status The CSS class that communicates the drop status back to the source so that the
4335     * underlying {@link Ext.dd.StatusProxy} can be updated
4336     */
4337    notifyEnter : function(dd, e, data){
4338        if(this.overClass){
4339            this.el.addClass(this.overClass);
4340        }
4341        return this.dropAllowed;
4342    },
4343
4344    /**
4345     * The function a {@link Ext.dd.DragSource} calls continuously while it is being dragged over the target.
4346     * This method will be called on every mouse movement while the drag source is over the drop target.
4347     * This default implementation simply returns the dropAllowed config value.
4348     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
4349     * @param {Event} e The event
4350     * @param {Object} data An object containing arbitrary data supplied by the drag source
4351     * @return {String} status The CSS class that communicates the drop status back to the source so that the
4352     * underlying {@link Ext.dd.StatusProxy} can be updated
4353     */
4354    notifyOver : function(dd, e, data){
4355        return this.dropAllowed;
4356    },
4357
4358    /**
4359     * The function a {@link Ext.dd.DragSource} calls once to notify this drop target that the source has been dragged
4360     * out of the target without dropping.  This default implementation simply removes the CSS class specified by
4361     * overClass (if any) from the drop element.
4362     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
4363     * @param {Event} e The event
4364     * @param {Object} data An object containing arbitrary data supplied by the drag source
4365     */
4366    notifyOut : function(dd, e, data){
4367        if(this.overClass){
4368            this.el.removeClass(this.overClass);
4369        }
4370    },
4371
4372    /**
4373     * The function a {@link Ext.dd.DragSource} calls once to notify this drop target that the dragged item has
4374     * been dropped on it.  This method has no default implementation and returns false, so you must provide an
4375     * implementation that does something to process the drop event and returns true so that the drag source's
4376     * repair action does not run.
4377     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
4378     * @param {Event} e The event
4379     * @param {Object} data An object containing arbitrary data supplied by the drag source
4380     * @return {Boolean} True if the drop was valid, else false
4381     */
4382    notifyDrop : function(dd, e, data){
4383        return false;
4384    },
4385   
4386    destroy : function(){
4387        Ext.dd.DropTarget.superclass.destroy.call(this);
4388        if(this.containerScroll){
4389            Ext.dd.ScrollManager.unregister(this.el);
4390        }
4391    }
4392});/**
4393 * @class Ext.dd.DragZone
4394 * @extends Ext.dd.DragSource
4395 * <p>This class provides a container DD instance that allows dragging of multiple child source nodes.</p>
4396 * <p>This class does not move the drag target nodes, but a proxy element which may contain
4397 * any DOM structure you wish. The DOM element to show in the proxy is provided by either a
4398 * provided implementation of {@link #getDragData}, or by registered draggables registered with {@link Ext.dd.Registry}</p>
4399 * <p>If you wish to provide draggability for an arbitrary number of DOM nodes, each of which represent some
4400 * application object (For example nodes in a {@link Ext.DataView DataView}) then use of this class
4401 * is the most efficient way to "activate" those nodes.</p>
4402 * <p>By default, this class requires that draggable child nodes are registered with {@link Ext.dd.Registry}.
4403 * However a simpler way to allow a DragZone to manage any number of draggable elements is to configure
4404 * the DragZone with  an implementation of the {@link #getDragData} method which interrogates the passed
4405 * mouse event to see if it has taken place within an element, or class of elements. This is easily done
4406 * by using the event's {@link Ext.EventObject#getTarget getTarget} method to identify a node based on a
4407 * {@link Ext.DomQuery} selector. For example, to make the nodes of a DataView draggable, use the following
4408 * technique. Knowledge of the use of the DataView is required:</p><pre><code>
4409myDataView.on('render', function(v) {
4410    myDataView.dragZone = new Ext.dd.DragZone(v.getEl(), {
4411
4412//      On receipt of a mousedown event, see if it is within a DataView node.
4413//      Return a drag data object if so.
4414        getDragData: function(e) {
4415
4416//          Use the DataView's own itemSelector (a mandatory property) to
4417//          test if the mousedown is within one of the DataView's nodes.
4418            var sourceEl = e.getTarget(v.itemSelector, 10);
4419
4420//          If the mousedown is within a DataView node, clone the node to produce
4421//          a ddel element for use by the drag proxy. Also add application data
4422//          to the returned data object.
4423            if (sourceEl) {
4424                d = sourceEl.cloneNode(true);
4425                d.id = Ext.id();
4426                return {
4427                    ddel: d,
4428                    sourceEl: sourceEl,
4429                    repairXY: Ext.fly(sourceEl).getXY(),
4430                    sourceStore: v.store,
4431                    draggedRecord: v.{@link Ext.DataView#getRecord getRecord}(sourceEl)
4432                }
4433            }
4434        },
4435
4436//      Provide coordinates for the proxy to slide back to on failed drag.
4437//      This is the original XY coordinates of the draggable element captured
4438//      in the getDragData method.
4439        getRepairXY: function() {
4440            return this.dragData.repairXY;
4441        }
4442    });
4443});</code></pre>
4444 * See the {@link Ext.dd.DropZone DropZone} documentation for details about building a DropZone which
4445 * cooperates with this DragZone.
4446 * @constructor
4447 * @param {Mixed} el The container element
4448 * @param {Object} config
4449 */
4450Ext.dd.DragZone = Ext.extend(Ext.dd.DragSource, {
4451   
4452    constructor : function(el, config){
4453        Ext.dd.DragZone.superclass.constructor.call(this, el, config);
4454        if(this.containerScroll){
4455            Ext.dd.ScrollManager.register(this.el);
4456        }
4457    },
4458   
4459    /**
4460     * This property contains the data representing the dragged object. This data is set up by the implementation
4461     * of the {@link #getDragData} method. It must contain a <tt>ddel</tt> property, but can contain
4462     * any other data according to the application's needs.
4463     * @type Object
4464     * @property dragData
4465     */
4466    /**
4467     * @cfg {Boolean} containerScroll True to register this container with the Scrollmanager
4468     * for auto scrolling during drag operations.
4469     */
4470    /**
4471     * @cfg {String} hlColor The color to use when visually highlighting the drag source in the afterRepair
4472     * method after a failed drop (defaults to "c3daf9" - light blue)
4473     */
4474
4475    /**
4476     * Called when a mousedown occurs in this container. Looks in {@link Ext.dd.Registry}
4477     * for a valid target to drag based on the mouse down. Override this method
4478     * to provide your own lookup logic (e.g. finding a child by class name). Make sure your returned
4479     * object has a "ddel" attribute (with an HTML Element) for other functions to work.
4480     * @param {EventObject} e The mouse down event
4481     * @return {Object} The dragData
4482     */
4483    getDragData : function(e){
4484        return Ext.dd.Registry.getHandleFromEvent(e);
4485    },
4486   
4487    /**
4488     * Called once drag threshold has been reached to initialize the proxy element. By default, it clones the
4489     * this.dragData.ddel
4490     * @param {Number} x The x position of the click on the dragged object
4491     * @param {Number} y The y position of the click on the dragged object
4492     * @return {Boolean} true to continue the drag, false to cancel
4493     */
4494    onInitDrag : function(x, y){
4495        this.proxy.update(this.dragData.ddel.cloneNode(true));
4496        this.onStartDrag(x, y);
4497        return true;
4498    },
4499   
4500    /**
4501     * Called after a repair of an invalid drop. By default, highlights this.dragData.ddel
4502     */
4503    afterRepair : function(){
4504        if(Ext.enableFx){
4505            Ext.Element.fly(this.dragData.ddel).highlight(this.hlColor || "c3daf9");
4506        }
4507        this.dragging = false;
4508    },
4509
4510    /**
4511     * Called before a repair of an invalid drop to get the XY to animate to. By default returns
4512     * the XY of this.dragData.ddel
4513     * @param {EventObject} e The mouse up event
4514     * @return {Array} The xy location (e.g. [100, 200])
4515     */
4516    getRepairXY : function(e){
4517        return Ext.Element.fly(this.dragData.ddel).getXY(); 
4518    },
4519   
4520    destroy : function(){
4521        Ext.dd.DragZone.superclass.destroy.call(this);
4522        if(this.containerScroll){
4523            Ext.dd.ScrollManager.unregister(this.el);
4524        }
4525    }
4526});/**
4527 * @class Ext.dd.DropZone
4528 * @extends Ext.dd.DropTarget
4529 * <p>This class provides a container DD instance that allows dropping on multiple child target nodes.</p>
4530 * <p>By default, this class requires that child nodes accepting drop are registered with {@link Ext.dd.Registry}.
4531 * However a simpler way to allow a DropZone to manage any number of target elements is to configure the
4532 * DropZone with an implementation of {@link #getTargetFromEvent} which interrogates the passed
4533 * mouse event to see if it has taken place within an element, or class of elements. This is easily done
4534 * by using the event's {@link Ext.EventObject#getTarget getTarget} method to identify a node based on a
4535 * {@link Ext.DomQuery} selector.</p>
4536 * <p>Once the DropZone has detected through calling getTargetFromEvent, that the mouse is over
4537 * a drop target, that target is passed as the first parameter to {@link #onNodeEnter}, {@link #onNodeOver},
4538 * {@link #onNodeOut}, {@link #onNodeDrop}. You may configure the instance of DropZone with implementations
4539 * of these methods to provide application-specific behaviour for these events to update both
4540 * application state, and UI state.</p>
4541 * <p>For example to make a GridPanel a cooperating target with the example illustrated in
4542 * {@link Ext.dd.DragZone DragZone}, the following technique might be used:</p><pre><code>
4543myGridPanel.on('render', function() {
4544    myGridPanel.dropZone = new Ext.dd.DropZone(myGridPanel.getView().scroller, {
4545
4546//      If the mouse is over a grid row, return that node. This is
4547//      provided as the "target" parameter in all "onNodeXXXX" node event handling functions
4548        getTargetFromEvent: function(e) {
4549            return e.getTarget(myGridPanel.getView().rowSelector);
4550        },
4551
4552//      On entry into a target node, highlight that node.
4553        onNodeEnter : function(target, dd, e, data){
4554            Ext.fly(target).addClass('my-row-highlight-class');
4555        },
4556
4557//      On exit from a target node, unhighlight that node.
4558        onNodeOut : function(target, dd, e, data){
4559            Ext.fly(target).removeClass('my-row-highlight-class');
4560        },
4561
4562//      While over a target node, return the default drop allowed class which
4563//      places a "tick" icon into the drag proxy.
4564        onNodeOver : function(target, dd, e, data){
4565            return Ext.dd.DropZone.prototype.dropAllowed;
4566        },
4567
4568//      On node drop we can interrogate the target to find the underlying
4569//      application object that is the real target of the dragged data.
4570//      In this case, it is a Record in the GridPanel's Store.
4571//      We can use the data set up by the DragZone's getDragData method to read
4572//      any data we decided to attach in the DragZone's getDragData method.
4573        onNodeDrop : function(target, dd, e, data){
4574            var rowIndex = myGridPanel.getView().findRowIndex(target);
4575            var r = myGridPanel.getStore().getAt(rowIndex);
4576            Ext.Msg.alert('Drop gesture', 'Dropped Record id ' + data.draggedRecord.id +
4577                ' on Record id ' + r.id);
4578            return true;
4579        }
4580    });
4581}
4582</code></pre>
4583 * See the {@link Ext.dd.DragZone DragZone} documentation for details about building a DragZone which
4584 * cooperates with this DropZone.
4585 * @constructor
4586 * @param {Mixed} el The container element
4587 * @param {Object} config
4588 */
4589Ext.dd.DropZone = function(el, config){
4590    Ext.dd.DropZone.superclass.constructor.call(this, el, config);
4591};
4592
4593Ext.extend(Ext.dd.DropZone, Ext.dd.DropTarget, {
4594    /**
4595     * Returns a custom data object associated with the DOM node that is the target of the event.  By default
4596     * this looks up the event target in the {@link Ext.dd.Registry}, although you can override this method to
4597     * provide your own custom lookup.
4598     * @param {Event} e The event
4599     * @return {Object} data The custom data
4600     */
4601    getTargetFromEvent : function(e){
4602        return Ext.dd.Registry.getTargetFromEvent(e);
4603    },
4604
4605    /**
4606     * Called when the DropZone determines that a {@link Ext.dd.DragSource} has entered a drop node
4607     * that has either been registered or detected by a configured implementation of {@link #getTargetFromEvent}.
4608     * This method has no default implementation and should be overridden to provide
4609     * node-specific processing if necessary.
4610     * @param {Object} nodeData The custom data associated with the drop node (this is the same value returned from
4611     * {@link #getTargetFromEvent} for this node)
4612     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
4613     * @param {Event} e The event
4614     * @param {Object} data An object containing arbitrary data supplied by the drag source
4615     */
4616    onNodeEnter : function(n, dd, e, data){
4617       
4618    },
4619
4620    /**
4621     * Called while the DropZone determines that a {@link Ext.dd.DragSource} is over a drop node
4622     * that has either been registered or detected by a configured implementation of {@link #getTargetFromEvent}.
4623     * The default implementation returns this.dropNotAllowed, so it should be
4624     * overridden to provide the proper feedback.
4625     * @param {Object} nodeData The custom data associated with the drop node (this is the same value returned from
4626     * {@link #getTargetFromEvent} for this node)
4627     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
4628     * @param {Event} e The event
4629     * @param {Object} data An object containing arbitrary data supplied by the drag source
4630     * @return {String} status The CSS class that communicates the drop status back to the source so that the
4631     * underlying {@link Ext.dd.StatusProxy} can be updated
4632     */
4633    onNodeOver : function(n, dd, e, data){
4634        return this.dropAllowed;
4635    },
4636
4637    /**
4638     * Called when the DropZone determines that a {@link Ext.dd.DragSource} has been dragged out of
4639     * the drop node without dropping.  This method has no default implementation and should be overridden to provide
4640     * node-specific processing if necessary.
4641     * @param {Object} nodeData The custom data associated with the drop node (this is the same value returned from
4642     * {@link #getTargetFromEvent} for this node)
4643     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
4644     * @param {Event} e The event
4645     * @param {Object} data An object containing arbitrary data supplied by the drag source
4646     */
4647    onNodeOut : function(n, dd, e, data){
4648       
4649    },
4650
4651    /**
4652     * Called when the DropZone determines that a {@link Ext.dd.DragSource} has been dropped onto
4653     * the drop node.  The default implementation returns false, so it should be overridden to provide the
4654     * appropriate processing of the drop event and return true so that the drag source's repair action does not run.
4655     * @param {Object} nodeData The custom data associated with the drop node (this is the same value returned from
4656     * {@link #getTargetFromEvent} for this node)
4657     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
4658     * @param {Event} e The event
4659     * @param {Object} data An object containing arbitrary data supplied by the drag source
4660     * @return {Boolean} True if the drop was valid, else false
4661     */
4662    onNodeDrop : function(n, dd, e, data){
4663        return false;
4664    },
4665
4666    /**
4667     * Called while the DropZone determines that a {@link Ext.dd.DragSource} is being dragged over it,
4668     * but not over any of its registered drop nodes.  The default implementation returns this.dropNotAllowed, so
4669     * it should be overridden to provide the proper feedback if necessary.
4670     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
4671     * @param {Event} e The event
4672     * @param {Object} data An object containing arbitrary data supplied by the drag source
4673     * @return {String} status The CSS class that communicates the drop status back to the source so that the
4674     * underlying {@link Ext.dd.StatusProxy} can be updated
4675     */
4676    onContainerOver : function(dd, e, data){
4677        return this.dropNotAllowed;
4678    },
4679
4680    /**
4681     * Called when the DropZone determines that a {@link Ext.dd.DragSource} has been dropped on it,
4682     * but not on any of its registered drop nodes.  The default implementation returns false, so it should be
4683     * overridden to provide the appropriate processing of the drop event if you need the drop zone itself to
4684     * be able to accept drops.  It should return true when valid so that the drag source's repair action does not run.
4685     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
4686     * @param {Event} e The event
4687     * @param {Object} data An object containing arbitrary data supplied by the drag source
4688     * @return {Boolean} True if the drop was valid, else false
4689     */
4690    onContainerDrop : function(dd, e, data){
4691        return false;
4692    },
4693
4694    /**
4695     * The function a {@link Ext.dd.DragSource} calls once to notify this drop zone that the source is now over
4696     * the zone.  The default implementation returns this.dropNotAllowed and expects that only registered drop
4697     * nodes can process drag drop operations, so if you need the drop zone itself to be able to process drops
4698     * you should override this method and provide a custom implementation.
4699     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
4700     * @param {Event} e The event
4701     * @param {Object} data An object containing arbitrary data supplied by the drag source
4702     * @return {String} status The CSS class that communicates the drop status back to the source so that the
4703     * underlying {@link Ext.dd.StatusProxy} can be updated
4704     */
4705    notifyEnter : function(dd, e, data){
4706        return this.dropNotAllowed;
4707    },
4708
4709    /**
4710     * The function a {@link Ext.dd.DragSource} calls continuously while it is being dragged over the drop zone.
4711     * This method will be called on every mouse movement while the drag source is over the drop zone.
4712     * It will call {@link #onNodeOver} while the drag source is over a registered node, and will also automatically
4713     * delegate to the appropriate node-specific methods as necessary when the drag source enters and exits
4714     * registered nodes ({@link #onNodeEnter}, {@link #onNodeOut}). If the drag source is not currently over a
4715     * registered node, it will call {@link #onContainerOver}.
4716     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
4717     * @param {Event} e The event
4718     * @param {Object} data An object containing arbitrary data supplied by the drag source
4719     * @return {String} status The CSS class that communicates the drop status back to the source so that the
4720     * underlying {@link Ext.dd.StatusProxy} can be updated
4721     */
4722    notifyOver : function(dd, e, data){
4723        var n = this.getTargetFromEvent(e);
4724        if(!n){ // not over valid drop target
4725            if(this.lastOverNode){
4726                this.onNodeOut(this.lastOverNode, dd, e, data);
4727                this.lastOverNode = null;
4728            }
4729            return this.onContainerOver(dd, e, data);
4730        }
4731        if(this.lastOverNode != n){
4732            if(this.lastOverNode){
4733                this.onNodeOut(this.lastOverNode, dd, e, data);
4734            }
4735            this.onNodeEnter(n, dd, e, data);
4736            this.lastOverNode = n;
4737        }
4738        return this.onNodeOver(n, dd, e, data);
4739    },
4740
4741    /**
4742     * The function a {@link Ext.dd.DragSource} calls once to notify this drop zone that the source has been dragged
4743     * out of the zone without dropping.  If the drag source is currently over a registered node, the notification
4744     * will be delegated to {@link #onNodeOut} for node-specific handling, otherwise it will be ignored.
4745     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop target
4746     * @param {Event} e The event
4747     * @param {Object} data An object containing arbitrary data supplied by the drag zone
4748     */
4749    notifyOut : function(dd, e, data){
4750        if(this.lastOverNode){
4751            this.onNodeOut(this.lastOverNode, dd, e, data);
4752            this.lastOverNode = null;
4753        }
4754    },
4755
4756    /**
4757     * The function a {@link Ext.dd.DragSource} calls once to notify this drop zone that the dragged item has
4758     * been dropped on it.  The drag zone will look up the target node based on the event passed in, and if there
4759     * is a node registered for that event, it will delegate to {@link #onNodeDrop} for node-specific handling,
4760     * otherwise it will call {@link #onContainerDrop}.
4761     * @param {Ext.dd.DragSource} source The drag source that was dragged over this drop zone
4762     * @param {Event} e The event
4763     * @param {Object} data An object containing arbitrary data supplied by the drag source
4764     * @return {Boolean} True if the drop was valid, else false
4765     */
4766    notifyDrop : function(dd, e, data){
4767        if(this.lastOverNode){
4768            this.onNodeOut(this.lastOverNode, dd, e, data);
4769            this.lastOverNode = null;
4770        }
4771        var n = this.getTargetFromEvent(e);
4772        return n ?
4773            this.onNodeDrop(n, dd, e, data) :
4774            this.onContainerDrop(dd, e, data);
4775    },
4776
4777    // private
4778    triggerCacheRefresh : function(){
4779        Ext.dd.DDM.refreshCache(this.groups);
4780    } 
4781});/**
4782 * @class Ext.Element
4783 */
4784Ext.Element.addMethods({
4785    /**
4786     * Initializes a {@link Ext.dd.DD} drag drop object for this element.
4787     * @param {String} group The group the DD object is member of
4788     * @param {Object} config The DD config object
4789     * @param {Object} overrides An object containing methods to override/implement on the DD object
4790     * @return {Ext.dd.DD} The DD object
4791     */
4792    initDD : function(group, config, overrides){
4793        var dd = new Ext.dd.DD(Ext.id(this.dom), group, config);
4794        return Ext.apply(dd, overrides);
4795    },
4796
4797    /**
4798     * Initializes a {@link Ext.dd.DDProxy} object for this element.
4799     * @param {String} group The group the DDProxy object is member of
4800     * @param {Object} config The DDProxy config object
4801     * @param {Object} overrides An object containing methods to override/implement on the DDProxy object
4802     * @return {Ext.dd.DDProxy} The DDProxy object
4803     */
4804    initDDProxy : function(group, config, overrides){
4805        var dd = new Ext.dd.DDProxy(Ext.id(this.dom), group, config);
4806        return Ext.apply(dd, overrides);
4807    },
4808
4809    /**
4810     * Initializes a {@link Ext.dd.DDTarget} object for this element.
4811     * @param {String} group The group the DDTarget object is member of
4812     * @param {Object} config The DDTarget config object
4813     * @param {Object} overrides An object containing methods to override/implement on the DDTarget object
4814     * @return {Ext.dd.DDTarget} The DDTarget object
4815     */
4816    initDDTarget : function(group, config, overrides){
4817        var dd = new Ext.dd.DDTarget(Ext.id(this.dom), group, config);
4818        return Ext.apply(dd, overrides);
4819    }
4820});
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