/*
+ * This is a derivative of the similarly named class in the YUI Library.
+ * The original license:
+ * Copyright (c) 2006, Yahoo! Inc. All rights reserved.
+ * Code licensed under the BSD License:
+ * http://developer.yahoo.net/yui/license.txt
+ */
+
+
+/**
+ * @class Ext.dd.DragDrop
+ * Defines the interface and base operation of items that that can be
+ * dragged or can be drop targets. It was designed to be extended, overriding
+ * the event handlers for startDrag, onDrag, onDragOver and onDragOut.
+ * Up to three html elements can be associated with a DragDrop instance:
+ * <ul>
+ * <li>linked element: the element that is passed into the constructor.
+ * This is the element which defines the boundaries for interaction with
+ * other DragDrop objects.</li>
+ * <li>handle element(s): The drag operation only occurs if the element that
+ * was clicked matches a handle element. By default this is the linked
+ * element, but there are times that you will want only a portion of the
+ * linked element to initiate the drag operation, and the setHandleElId()
+ * method provides a way to define this.</li>
+ * <li>drag element: this represents the element that would be moved along
+ * with the cursor during a drag operation. By default, this is the linked
+ * element itself as in {@link Ext.dd.DD}. setDragElId() lets you define
+ * a separate element that would be moved, as in {@link Ext.dd.DDProxy}.
+ * </li>
+ * </ul>
+ * This class should not be instantiated until the onload event to ensure that
+ * the associated elements are available.
+ * The following would define a DragDrop obj that would interact with any
+ * other DragDrop obj in the "group1" group:
+ * <pre>
+ * dd = new Ext.dd.DragDrop("div1", "group1");
+ * </pre>
+ * Since none of the event handlers have been implemented, nothing would
+ * actually happen if you were to run the code above. Normally you would
+ * override this class or one of the default implementations, but you can
+ * also override the methods you want on an instance of the class...
+ * <pre>
+ * dd.onDragDrop = function(e, id) {
+ * alert("dd was dropped on " + id);
+ * }
+ * </pre>
+ * @constructor
+ * @param {String} id of the element that is linked to this instance
+ * @param {String} sGroup the group of related DragDrop objects
+ * @param {object} config an object containing configurable attributes
+ * Valid properties for DragDrop:
+ * padding, isTarget, maintainOffset, primaryButtonOnly
+ */
+
+Ext.define('Ext.dd.DragDrop', {
+ requires: ['Ext.dd.DragDropManager'],
+ constructor: function(id, sGroup, config) {
+ if(id) {
+ this.init(id, sGroup, config);
+ }
+ },
+
+ /**
+ * Set to false to enable a DragDrop object to fire drag events while dragging
+ * over its own Element. Defaults to true - DragDrop objects do not by default
+ * fire drag events to themselves.
+ * @property ignoreSelf
+ * @type Boolean
+ */
+
+ /**
+ * The id of the element associated with this object. This is what we
+ * refer to as the "linked element" because the size and position of
+ * this element is used to determine when the drag and drop objects have
+ * interacted.
+ * @property id
+ * @type String
+ */
+ id: null,
+
+ /**
+ * Configuration attributes passed into the constructor
+ * @property config
+ * @type object
+ */
+ config: null,
+
+ /**
+ * The id of the element that will be dragged. By default this is same
+ * as the linked element, but could be changed to another element. Ex:
+ * Ext.dd.DDProxy
+ * @property dragElId
+ * @type String
+ * @private
+ */
+ dragElId: null,
+
+ /**
+ * The ID of the element that initiates the drag operation. By default
+ * this is the linked element, but could be changed to be a child of this
+ * element. This lets us do things like only starting the drag when the
+ * header element within the linked html element is clicked.
+ * @property handleElId
+ * @type String
+ * @private
+ */
+ handleElId: null,
+
+ /**
+ * An object who's property names identify HTML tags to be considered invalid as drag handles.
+ * A non-null property value identifies the tag as invalid. Defaults to the
+ * following value which prevents drag operations from being initiated by <a> elements:<pre><code>
+{
+ A: "A"
+}</code></pre>
+ * @property invalidHandleTypes
+ * @type Object
+ */
+ invalidHandleTypes: null,
+
+ /**
+ * An object who's property names identify the IDs of elements to be considered invalid as drag handles.
+ * A non-null property value identifies the ID as invalid. For example, to prevent
+ * dragging from being initiated on element ID "foo", use:<pre><code>
+{
+ foo: true
+}</code></pre>
+ * @property invalidHandleIds
+ * @type Object
+ */
+ invalidHandleIds: null,
+
+ /**
+ * An Array of CSS class names for elements to be considered in valid as drag handles.
+ * @property invalidHandleClasses
+ * @type Array
+ */
+ invalidHandleClasses: null,
+
+ /**
+ * The linked element's absolute X position at the time the drag was
+ * started
+ * @property startPageX
+ * @type int
+ * @private
+ */
+ startPageX: 0,
+
+ /**
+ * The linked element's absolute X position at the time the drag was
+ * started
+ * @property startPageY
+ * @type int
+ * @private
+ */
+ startPageY: 0,
+
+ /**
+ * The group defines a logical collection of DragDrop objects that are
+ * related. Instances only get events when interacting with other
+ * DragDrop object in the same group. This lets us define multiple
+ * groups using a single DragDrop subclass if we want.
+ * @property groups
+ * @type object An object in the format {'group1':true, 'group2':true}
+ */
+ groups: null,
+
+ /**
+ * Individual drag/drop instances can be locked. This will prevent
+ * onmousedown start drag.
+ * @property locked
+ * @type boolean
+ * @private
+ */
+ locked: false,
+
+ /**
+ * Lock this instance
+ * @method lock
+ */
+ lock: function() {
+ this.locked = true;
+ },
+
+ /**
+ * When set to true, other DD objects in cooperating DDGroups do not receive
+ * notification events when this DD object is dragged over them. Defaults to false.
+ * @property moveOnly
+ * @type boolean
+ */
+ moveOnly: false,
+
+ /**
+ * Unlock this instace
+ * @method unlock
+ */
+ unlock: function() {
+ this.locked = false;
+ },
+
+ /**
+ * By default, all instances can be a drop target. This can be disabled by
+ * setting isTarget to false.
+ * @property isTarget
+ * @type boolean
+ */
+ isTarget: true,
+
+ /**
+ * The padding configured for this drag and drop object for calculating
+ * the drop zone intersection with this object.
+ * @property padding
+ * @type int[] An array containing the 4 padding values: [top, right, bottom, left]
+ */
+ padding: null,
+
+ /**
+ * Cached reference to the linked element
+ * @property _domRef
+ * @private
+ */
+ _domRef: null,
+
+ /**
+ * Internal typeof flag
+ * @property __ygDragDrop
+ * @private
+ */
+ __ygDragDrop: true,
+
+ /**
+ * Set to true when horizontal contraints are applied
+ * @property constrainX
+ * @type boolean
+ * @private
+ */
+ constrainX: false,
+
+ /**
+ * Set to true when vertical contraints are applied
+ * @property constrainY
+ * @type boolean
+ * @private
+ */
+ constrainY: false,
+
+ /**
+ * The left constraint
+ * @property minX
+ * @type int
+ * @private
+ */
+ minX: 0,
+
+ /**
+ * The right constraint
+ * @property maxX
+ * @type int
+ * @private
+ */
+ maxX: 0,
+
+ /**
+ * The up constraint
+ * @property minY
+ * @type int
+ * @private
+ */
+ minY: 0,
+
+ /**
+ * The down constraint
+ * @property maxY
+ * @type int
+ * @private
+ */
+ maxY: 0,
+
+ /**
+ * Maintain offsets when we resetconstraints. Set to true when you want
+ * the position of the element relative to its parent to stay the same
+ * when the page changes
+ *
+ * @property maintainOffset
+ * @type boolean
+ */
+ maintainOffset: false,
+
+ /**
+ * Array of pixel locations the element will snap to if we specified a
+ * horizontal graduation/interval. This array is generated automatically
+ * when you define a tick interval.
+ * @property xTicks
+ * @type int[]
+ */
+ xTicks: null,
+
+ /**
+ * Array of pixel locations the element will snap to if we specified a
+ * vertical graduation/interval. This array is generated automatically
+ * when you define a tick interval.
+ * @property yTicks
+ * @type int[]
+ */
+ yTicks: null,
+
+ /**
+ * By default the drag and drop instance will only respond to the primary
+ * button click (left button for a right-handed mouse). Set to true to
+ * allow drag and drop to start with any mouse click that is propogated
+ * by the browser
+ * @property primaryButtonOnly
+ * @type boolean
+ */
+ primaryButtonOnly: true,
+
+ /**
+ * The available property is false until the linked dom element is accessible.
+ * @property available
+ * @type boolean
+ */
+ available: false,
+
+ /**
+ * By default, drags can only be initiated if the mousedown occurs in the
+ * region the linked element is. This is done in part to work around a
+ * bug in some browsers that mis-report the mousedown if the previous
+ * mouseup happened outside of the window. This property is set to true
+ * if outer handles are defined.
+ *
+ * @property hasOuterHandles
+ * @type boolean
+ * @default false
+ */
+ hasOuterHandles: false,
+
+ /**
+ * Code that executes immediately before the startDrag event
+ * @method b4StartDrag
+ * @private
+ */
+ b4StartDrag: function(x, y) { },
+
+ /**
+ * Abstract method called after a drag/drop object is clicked
+ * and the drag or mousedown time thresholds have beeen met.
+ * @method startDrag
+ * @param {int} X click location
+ * @param {int} Y click location
+ */
+ startDrag: function(x, y) { /* override this */ },
+
+ /**
+ * Code that executes immediately before the onDrag event
+ * @method b4Drag
+ * @private
+ */
+ b4Drag: function(e) { },
+
+ /**
+ * Abstract method called during the onMouseMove event while dragging an
+ * object.
+ * @method onDrag
+ * @param {Event} e the mousemove event
+ */
+ onDrag: function(e) { /* override this */ },
+
+ /**
+ * Abstract method called when this element fist begins hovering over
+ * another DragDrop obj
+ * @method onDragEnter
+ * @param {Event} e the mousemove event
+ * @param {String|DragDrop[]} id In POINT mode, the element
+ * id this is hovering over. In INTERSECT mode, an array of one or more
+ * dragdrop items being hovered over.
+ */
+ onDragEnter: function(e, id) { /* override this */ },
+
+ /**
+ * Code that executes immediately before the onDragOver event
+ * @method b4DragOver
+ * @private
+ */
+ b4DragOver: function(e) { },
+
+ /**
+ * Abstract method called when this element is hovering over another
+ * DragDrop obj
+ * @method onDragOver
+ * @param {Event} e the mousemove event
+ * @param {String|DragDrop[]} id In POINT mode, the element
+ * id this is hovering over. In INTERSECT mode, an array of dd items
+ * being hovered over.
+ */
+ onDragOver: function(e, id) { /* override this */ },
+
+ /**
+ * Code that executes immediately before the onDragOut event
+ * @method b4DragOut
+ * @private
+ */
+ b4DragOut: function(e) { },
+
+ /**
+ * Abstract method called when we are no longer hovering over an element
+ * @method onDragOut
+ * @param {Event} e the mousemove event
+ * @param {String|DragDrop[]} id In POINT mode, the element
+ * id this was hovering over. In INTERSECT mode, an array of dd items
+ * that the mouse is no longer over.
+ */
+ onDragOut: function(e, id) { /* override this */ },
+
+ /**
+ * Code that executes immediately before the onDragDrop event
+ * @method b4DragDrop
+ * @private
+ */
+ b4DragDrop: function(e) { },
+
+ /**
+ * Abstract method called when this item is dropped on another DragDrop
+ * obj
+ * @method onDragDrop
+ * @param {Event} e the mouseup event
+ * @param {String|DragDrop[]} id In POINT mode, the element
+ * id this was dropped on. In INTERSECT mode, an array of dd items this
+ * was dropped on.
+ */
+ onDragDrop: function(e, id) { /* override this */ },
+
+ /**
+ * Abstract method called when this item is dropped on an area with no
+ * drop target
+ * @method onInvalidDrop
+ * @param {Event} e the mouseup event
+ */
+ onInvalidDrop: function(e) { /* override this */ },
+
+ /**
+ * Code that executes immediately before the endDrag event
+ * @method b4EndDrag
+ * @private
+ */
+ b4EndDrag: function(e) { },
+
+ /**
+ * Fired when we are done dragging the object
+ * @method endDrag
+ * @param {Event} e the mouseup event
+ */
+ endDrag: function(e) { /* override this */ },
+
+ /**
+ * Code executed immediately before the onMouseDown event
+ * @method b4MouseDown
+ * @param {Event} e the mousedown event
+ * @private
+ */
+ b4MouseDown: function(e) { },
+
+ /**
+ * Event handler that fires when a drag/drop obj gets a mousedown
+ * @method onMouseDown
+ * @param {Event} e the mousedown event
+ */
+ onMouseDown: function(e) { /* override this */ },
+
+ /**
+ * Event handler that fires when a drag/drop obj gets a mouseup
+ * @method onMouseUp
+ * @param {Event} e the mouseup event
+ */
+ onMouseUp: function(e) { /* override this */ },
+
+ /**
+ * Override the onAvailable method to do what is needed after the initial
+ * position was determined.
+ * @method onAvailable
+ */
+ onAvailable: function () {
+ },
+
+ /**
+ * Provides default constraint padding to "constrainTo" elements (defaults to {left: 0, right:0, top:0, bottom:0}).
+ * @type Object
+ */
+ defaultPadding: {
+ left: 0,
+ right: 0,
+ top: 0,
+ bottom: 0
+ },
+
+ /**
+ * Initializes the drag drop object's constraints to restrict movement to a certain element.
+ *
+ * Usage:
+ <pre><code>
+ var dd = new Ext.dd.DDProxy("dragDiv1", "proxytest",
+ { dragElId: "existingProxyDiv" });
+ dd.startDrag = function(){
+ this.constrainTo("parent-id");
+ };
+ </code></pre>
+ * Or you can initalize it using the {@link Ext.core.Element} object:
+ <pre><code>
+ Ext.get("dragDiv1").initDDProxy("proxytest", {dragElId: "existingProxyDiv"}, {
+ startDrag : function(){
+ this.constrainTo("parent-id");
+ }
+ });
+ </code></pre>
+ * @param {Mixed} constrainTo The element to constrain to.
+ * @param {Object/Number} pad (optional) Pad provides a way to specify "padding" of the constraints,
+ * and can be either a number for symmetrical padding (4 would be equal to {left:4, right:4, top:4, bottom:4}) or
+ * an object containing the sides to pad. For example: {right:10, bottom:10}
+ * @param {Boolean} inContent (optional) Constrain the draggable in the content box of the element (inside padding and borders)
+ */
+ constrainTo : function(constrainTo, pad, inContent){
+ if(Ext.isNumber(pad)){
+ pad = {left: pad, right:pad, top:pad, bottom:pad};
+ }
+ pad = pad || this.defaultPadding;
+ var b = Ext.get(this.getEl()).getBox(),
+ ce = Ext.get(constrainTo),
+ s = ce.getScroll(),
+ c,
+ cd = ce.dom;
+ if(cd == document.body){
+ c = { x: s.left, y: s.top, width: Ext.core.Element.getViewWidth(), height: Ext.core.Element.getViewHeight()};
+ }else{
+ var xy = ce.getXY();
+ c = {x : xy[0], y: xy[1], width: cd.clientWidth, height: cd.clientHeight};
+ }
+
+
+ var topSpace = b.y - c.y,
+ leftSpace = b.x - c.x;
+
+ this.resetConstraints();
+ this.setXConstraint(leftSpace - (pad.left||0), // left
+ c.width - leftSpace - b.width - (pad.right||0), //right
+ this.xTickSize
+ );
+ this.setYConstraint(topSpace - (pad.top||0), //top
+ c.height - topSpace - b.height - (pad.bottom||0), //bottom
+ this.yTickSize
+ );
+ },
+
+ /**
+ * Returns a reference to the linked element
+ * @method getEl
+ * @return {HTMLElement} the html element
+ */
+ getEl: function() {
+ if (!this._domRef) {
+ this._domRef = Ext.getDom(this.id);
+ }
+
+ return this._domRef;
+ },
+
+ /**
+ * Returns a reference to the actual element to drag. By default this is
+ * the same as the html element, but it can be assigned to another
+ * element. An example of this can be found in Ext.dd.DDProxy
+ * @method getDragEl
+ * @return {HTMLElement} the html element
+ */
+ getDragEl: function() {
+ return Ext.getDom(this.dragElId);
+ },
+
+ /**
+ * Sets up the DragDrop object. Must be called in the constructor of any
+ * Ext.dd.DragDrop subclass
+ * @method init
+ * @param id the id of the linked element
+ * @param {String} sGroup the group of related items
+ * @param {object} config configuration attributes
+ */
+ init: function(id, sGroup, config) {
+ this.initTarget(id, sGroup, config);
+ Ext.EventManager.on(this.id, "mousedown", this.handleMouseDown, this);
+ // Ext.EventManager.on(this.id, "selectstart", Event.preventDefault);
+ },
+
+ /**
+ * Initializes Targeting functionality only... the object does not
+ * get a mousedown handler.
+ * @method initTarget
+ * @param id the id of the linked element
+ * @param {String} sGroup the group of related items
+ * @param {object} config configuration attributes
+ */
+ initTarget: function(id, sGroup, config) {
+
+ // configuration attributes
+ this.config = config || {};
+
+ // create a local reference to the drag and drop manager
+ this.DDMInstance = Ext.dd.DragDropManager;
+ // initialize the groups array
+ this.groups = {};
+
+ // assume that we have an element reference instead of an id if the
+ // parameter is not a string
+ if (typeof id !== "string") {
+ id = Ext.id(id);
+ }
+
+ // set the id
+ this.id = id;
+
+ // add to an interaction group
+ this.addToGroup((sGroup) ? sGroup : "default");
+
+ // We don't want to register this as the handle with the manager
+ // so we just set the id rather than calling the setter.
+ this.handleElId = id;
+
+ // the linked element is the element that gets dragged by default
+ this.setDragElId(id);
+
+ // by default, clicked anchors will not start drag operations.
+ this.invalidHandleTypes = { A: "A" };
+ this.invalidHandleIds = {};
+ this.invalidHandleClasses = [];
+
+ this.applyConfig();
+
+ this.handleOnAvailable();
+ },
+
+ /**
+ * Applies the configuration parameters that were passed into the constructor.
+ * This is supposed to happen at each level through the inheritance chain. So
+ * a DDProxy implentation will execute apply config on DDProxy, DD, and
+ * DragDrop in order to get all of the parameters that are available in
+ * each object.
+ * @method applyConfig
+ */
+ applyConfig: function() {
+
+ // configurable properties:
+ // padding, isTarget, maintainOffset, primaryButtonOnly
+ this.padding = this.config.padding || [0, 0, 0, 0];
+ this.isTarget = (this.config.isTarget !== false);
+ this.maintainOffset = (this.config.maintainOffset);
+ this.primaryButtonOnly = (this.config.primaryButtonOnly !== false);
+
+ },
+
+ /**
+ * Executed when the linked element is available
+ * @method handleOnAvailable
+ * @private
+ */
+ handleOnAvailable: function() {
+ this.available = true;
+ this.resetConstraints();
+ this.onAvailable();
+ },
+
+ /**
+ * Configures the padding for the target zone in px. Effectively expands
+ * (or reduces) the virtual object size for targeting calculations.
+ * Supports css-style shorthand; if only one parameter is passed, all sides
+ * will have that padding, and if only two are passed, the top and bottom
+ * will have the first param, the left and right the second.
+ * @method setPadding
+ * @param {int} iTop Top pad
+ * @param {int} iRight Right pad
+ * @param {int} iBot Bot pad
+ * @param {int} iLeft Left pad
+ */
+ setPadding: function(iTop, iRight, iBot, iLeft) {
+ // this.padding = [iLeft, iRight, iTop, iBot];
+ if (!iRight && 0 !== iRight) {
+ this.padding = [iTop, iTop, iTop, iTop];
+ } else if (!iBot && 0 !== iBot) {
+ this.padding = [iTop, iRight, iTop, iRight];
+ } else {
+ this.padding = [iTop, iRight, iBot, iLeft];
+ }
+ },
+
+ /**
+ * Stores the initial placement of the linked element.
+ * @method setInitPosition
+ * @param {int} diffX the X offset, default 0
+ * @param {int} diffY the Y offset, default 0
+ */
+ setInitPosition: function(diffX, diffY) {
+ var el = this.getEl();
+
+ if (!this.DDMInstance.verifyEl(el)) {
+ return;
+ }
+
+ var dx = diffX || 0;
+ var dy = diffY || 0;
+
+ var p = Ext.core.Element.getXY( el );
+
+ this.initPageX = p[0] - dx;
+ this.initPageY = p[1] - dy;
+
+ this.lastPageX = p[0];
+ this.lastPageY = p[1];
+
+ this.setStartPosition(p);
+ },
+
+ /**
+ * Sets the start position of the element. This is set when the obj
+ * is initialized, the reset when a drag is started.
+ * @method setStartPosition
+ * @param pos current position (from previous lookup)
+ * @private
+ */
+ setStartPosition: function(pos) {
+ var p = pos || Ext.core.Element.getXY( this.getEl() );
+ this.deltaSetXY = null;
+
+ this.startPageX = p[0];
+ this.startPageY = p[1];
+ },
+
+ /**
+ * Add this instance to a group of related drag/drop objects. All
+ * instances belong to at least one group, and can belong to as many
+ * groups as needed.
+ * @method addToGroup
+ * @param sGroup {string} the name of the group
+ */
+ addToGroup: function(sGroup) {
+ this.groups[sGroup] = true;
+ this.DDMInstance.regDragDrop(this, sGroup);
+ },
+
+ /**
+ * Remove's this instance from the supplied interaction group
+ * @method removeFromGroup
+ * @param {string} sGroup The group to drop
+ */
+ removeFromGroup: function(sGroup) {
+ if (this.groups[sGroup]) {
+ delete this.groups[sGroup];
+ }
+
+ this.DDMInstance.removeDDFromGroup(this, sGroup);
+ },
+
+ /**
+ * Allows you to specify that an element other than the linked element
+ * will be moved with the cursor during a drag
+ * @method setDragElId
+ * @param id {string} the id of the element that will be used to initiate the drag
+ */
+ setDragElId: function(id) {
+ this.dragElId = id;
+ },
+
+ /**
+ * Allows you to specify a child of the linked element that should be
+ * used to initiate the drag operation. An example of this would be if
+ * you have a content div with text and links. Clicking anywhere in the
+ * content area would normally start the drag operation. Use this method
+ * to specify that an element inside of the content div is the element
+ * that starts the drag operation.
+ * @method setHandleElId
+ * @param id {string} the id of the element that will be used to
+ * initiate the drag.
+ */
+ setHandleElId: function(id) {
+ if (typeof id !== "string") {
+ id = Ext.id(id);
+ }
+ this.handleElId = id;
+ this.DDMInstance.regHandle(this.id, id);
+ },
+
+ /**
+ * Allows you to set an element outside of the linked element as a drag
+ * handle
+ * @method setOuterHandleElId
+ * @param id the id of the element that will be used to initiate the drag
+ */
+ setOuterHandleElId: function(id) {
+ if (typeof id !== "string") {
+ id = Ext.id(id);
+ }
+ Ext.EventManager.on(id, "mousedown", this.handleMouseDown, this);
+ this.setHandleElId(id);
+
+ this.hasOuterHandles = true;
+ },
+
+ /**
+ * Remove all drag and drop hooks for this element
+ * @method unreg
+ */
+ unreg: function() {
+ Ext.EventManager.un(this.id, "mousedown", this.handleMouseDown, this);
+ this._domRef = null;
+ this.DDMInstance._remove(this);
+ },
+
+ destroy : function(){
+ this.unreg();
+ },
+
+ /**
+ * Returns true if this instance is locked, or the drag drop mgr is locked
+ * (meaning that all drag/drop is disabled on the page.)
+ * @method isLocked
+ * @return {boolean} true if this obj or all drag/drop is locked, else
+ * false
+ */
+ isLocked: function() {
+ return (this.DDMInstance.isLocked() || this.locked);
+ },
+
+ /**
+ * Fired when this object is clicked
+ * @method handleMouseDown
+ * @param {Event} e
+ * @param {Ext.dd.DragDrop} oDD the clicked dd object (this dd obj)
+ * @private
+ */
+ handleMouseDown: function(e, oDD){
+ if (this.primaryButtonOnly && e.button != 0) {
+ return;
+ }
+
+ if (this.isLocked()) {
+ return;
+ }
+
+ this.DDMInstance.refreshCache(this.groups);
+
+ var pt = e.getPoint();
+ if (!this.hasOuterHandles && !this.DDMInstance.isOverTarget(pt, this) ) {
+ } else {
+ if (this.clickValidator(e)) {
+ // set the initial element position
+ this.setStartPosition();
+ this.b4MouseDown(e);
+ this.onMouseDown(e);
+
+ this.DDMInstance.handleMouseDown(e, this);
+
+ this.DDMInstance.stopEvent(e);
+ } else {
+
+
+ }
+ }
+ },
+
+ clickValidator: function(e) {
+ var target = e.getTarget();
+ return ( this.isValidHandleChild(target) &&
+ (this.id == this.handleElId ||
+ this.DDMInstance.handleWasClicked(target, this.id)) );
+ },
+
+ /**
+ * Allows you to specify a tag name that should not start a drag operation
+ * when clicked. This is designed to facilitate embedding links within a
+ * drag handle that do something other than start the drag.
+ * @method addInvalidHandleType
+ * @param {string} tagName the type of element to exclude
+ */
+ addInvalidHandleType: function(tagName) {
+ var type = tagName.toUpperCase();
+ this.invalidHandleTypes[type] = type;
+ },
+
+ /**
+ * Lets you to specify an element id for a child of a drag handle
+ * that should not initiate a drag
+ * @method addInvalidHandleId
+ * @param {string} id the element id of the element you wish to ignore
+ */
+ addInvalidHandleId: function(id) {
+ if (typeof id !== "string") {
+ id = Ext.id(id);
+ }
+ this.invalidHandleIds[id] = id;
+ },
+
+ /**
+ * Lets you specify a css class of elements that will not initiate a drag
+ * @method addInvalidHandleClass
+ * @param {string} cssClass the class of the elements you wish to ignore
+ */
+ addInvalidHandleClass: function(cssClass) {
+ this.invalidHandleClasses.push(cssClass);
+ },
+
+ /**
+ * Unsets an excluded tag name set by addInvalidHandleType
+ * @method removeInvalidHandleType
+ * @param {string} tagName the type of element to unexclude
+ */
+ removeInvalidHandleType: function(tagName) {
+ var type = tagName.toUpperCase();
+ // this.invalidHandleTypes[type] = null;
+ delete this.invalidHandleTypes[type];
+ },
+
+ /**
+ * Unsets an invalid handle id
+ * @method removeInvalidHandleId
+ * @param {string} id the id of the element to re-enable
+ */
+ removeInvalidHandleId: function(id) {
+ if (typeof id !== "string") {
+ id = Ext.id(id);
+ }
+ delete this.invalidHandleIds[id];
+ },
+
+ /**
+ * Unsets an invalid css class
+ * @method removeInvalidHandleClass
+ * @param {string} cssClass the class of the element(s) you wish to
+ * re-enable
+ */
+ removeInvalidHandleClass: function(cssClass) {
+ for (var i=0, len=this.invalidHandleClasses.length; i<len; ++i) {
+ if (this.invalidHandleClasses[i] == cssClass) {
+ delete this.invalidHandleClasses[i];
+ }
+ }
+ },
+
+ /**
+ * Checks the tag exclusion list to see if this click should be ignored
+ * @method isValidHandleChild
+ * @param {HTMLElement} node the HTMLElement to evaluate
+ * @return {boolean} true if this is a valid tag type, false if not
+ */
+ isValidHandleChild: function(node) {
+
+ var valid = true;
+ // var n = (node.nodeName == "#text") ? node.parentNode : node;
+ var nodeName;
+ try {
+ nodeName = node.nodeName.toUpperCase();
+ } catch(e) {
+ nodeName = node.nodeName;
+ }
+ valid = valid && !this.invalidHandleTypes[nodeName];
+ valid = valid && !this.invalidHandleIds[node.id];
+
+ for (var i=0, len=this.invalidHandleClasses.length; valid && i<len; ++i) {
+ valid = !Ext.fly(node).hasCls(this.invalidHandleClasses[i]);
+ }
+
+
+ return valid;
+
+ },
+
+ /**
+ * Create the array of horizontal tick marks if an interval was specified
+ * in setXConstraint().
+ * @method setXTicks
+ * @private
+ */
+ setXTicks: function(iStartX, iTickSize) {
+ this.xTicks = [];
+ this.xTickSize = iTickSize;
+
+ var tickMap = {};
+
+ for (var i = this.initPageX; i >= this.minX; i = i - iTickSize) {
+ if (!tickMap[i]) {
+ this.xTicks[this.xTicks.length] = i;
+ tickMap[i] = true;
+ }
+ }
+
+ for (i = this.initPageX; i <= this.maxX; i = i + iTickSize) {
+ if (!tickMap[i]) {
+ this.xTicks[this.xTicks.length] = i;
+ tickMap[i] = true;
+ }
+ }
+
+ Ext.Array.sort(this.xTicks, this.DDMInstance.numericSort);
+ },
+
+ /**
+ * Create the array of vertical tick marks if an interval was specified in
+ * setYConstraint().
+ * @method setYTicks
+ * @private
+ */
+ setYTicks: function(iStartY, iTickSize) {
+ this.yTicks = [];
+ this.yTickSize = iTickSize;
+
+ var tickMap = {};
+
+ for (var i = this.initPageY; i >= this.minY; i = i - iTickSize) {
+ if (!tickMap[i]) {
+ this.yTicks[this.yTicks.length] = i;
+ tickMap[i] = true;
+ }
+ }
+
+ for (i = this.initPageY; i <= this.maxY; i = i + iTickSize) {
+ if (!tickMap[i]) {
+ this.yTicks[this.yTicks.length] = i;
+ tickMap[i] = true;
+ }
+ }
+
+ Ext.Array.sort(this.yTicks, this.DDMInstance.numericSort);
+ },
+
+ /**
+ * By default, the element can be dragged any place on the screen. Use
+ * this method to limit the horizontal travel of the element. Pass in
+ * 0,0 for the parameters if you want to lock the drag to the y axis.
+ * @method setXConstraint
+ * @param {int} iLeft the number of pixels the element can move to the left
+ * @param {int} iRight the number of pixels the element can move to the
+ * right
+ * @param {int} iTickSize optional parameter for specifying that the
+ * element
+ * should move iTickSize pixels at a time.
+ */
+ setXConstraint: function(iLeft, iRight, iTickSize) {
+ this.leftConstraint = iLeft;
+ this.rightConstraint = iRight;
+
+ this.minX = this.initPageX - iLeft;
+ this.maxX = this.initPageX + iRight;
+ if (iTickSize) { this.setXTicks(this.initPageX, iTickSize); }
+
+ this.constrainX = true;
+ },
+
+ /**
+ * Clears any constraints applied to this instance. Also clears ticks
+ * since they can't exist independent of a constraint at this time.
+ * @method clearConstraints
+ */
+ clearConstraints: function() {
+ this.constrainX = false;
+ this.constrainY = false;
+ this.clearTicks();
+ },
+
+ /**
+ * Clears any tick interval defined for this instance
+ * @method clearTicks
+ */
+ clearTicks: function() {
+ this.xTicks = null;
+ this.yTicks = null;
+ this.xTickSize = 0;
+ this.yTickSize = 0;
+ },
+
+ /**
+ * By default, the element can be dragged any place on the screen. Set
+ * this to limit the vertical travel of the element. Pass in 0,0 for the
+ * parameters if you want to lock the drag to the x axis.
+ * @method setYConstraint
+ * @param {int} iUp the number of pixels the element can move up
+ * @param {int} iDown the number of pixels the element can move down
+ * @param {int} iTickSize optional parameter for specifying that the
+ * element should move iTickSize pixels at a time.
+ */
+ setYConstraint: function(iUp, iDown, iTickSize) {
+ this.topConstraint = iUp;
+ this.bottomConstraint = iDown;
+
+ this.minY = this.initPageY - iUp;
+ this.maxY = this.initPageY + iDown;
+ if (iTickSize) { this.setYTicks(this.initPageY, iTickSize); }
+
+ this.constrainY = true;
+
+ },
+
+ /**
+ * resetConstraints must be called if you manually reposition a dd element.
+ * @method resetConstraints
+ * @param {boolean} maintainOffset
+ */
+ resetConstraints: function() {
+ // Maintain offsets if necessary
+ if (this.initPageX || this.initPageX === 0) {
+ // figure out how much this thing has moved
+ var dx = (this.maintainOffset) ? this.lastPageX - this.initPageX : 0;
+ var dy = (this.maintainOffset) ? this.lastPageY - this.initPageY : 0;
+
+ this.setInitPosition(dx, dy);
+
+ // This is the first time we have detected the element's position
+ } else {
+ this.setInitPosition();
+ }
+
+ if (this.constrainX) {
+ this.setXConstraint( this.leftConstraint,
+ this.rightConstraint,
+ this.xTickSize );
+ }
+
+ if (this.constrainY) {
+ this.setYConstraint( this.topConstraint,
+ this.bottomConstraint,
+ this.yTickSize );
+ }
+ },
+
+ /**
+ * Normally the drag element is moved pixel by pixel, but we can specify
+ * that it move a number of pixels at a time. This method resolves the
+ * location when we have it set up like this.
+ * @method getTick
+ * @param {int} val where we want to place the object
+ * @param {int[]} tickArray sorted array of valid points
+ * @return {int} the closest tick
+ * @private
+ */
+ getTick: function(val, tickArray) {
+ if (!tickArray) {
+ // If tick interval is not defined, it is effectively 1 pixel,
+ // so we return the value passed to us.
+ return val;
+ } else if (tickArray[0] >= val) {
+ // The value is lower than the first tick, so we return the first
+ // tick.
+ return tickArray[0];
+ } else {
+ for (var i=0, len=tickArray.length; i<len; ++i) {
+ var next = i + 1;
+ if (tickArray[next] && tickArray[next] >= val) {
+ var diff1 = val - tickArray[i];
+ var diff2 = tickArray[next] - val;
+ return (diff2 > diff1) ? tickArray[i] : tickArray[next];
+ }
+ }
+
+ // The value is larger than the last tick, so we return the last
+ // tick.
+ return tickArray[tickArray.length - 1];
+ }
+ },
+
+ /**
+ * toString method
+ * @method toString
+ * @return {string} string representation of the dd obj
+ */
+ toString: function() {
+ return ("DragDrop " + this.id);
+ }
+
+});