Diffstat (limited to 'frontend/beta/js/YUI/dragdrop.js') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | frontend/beta/js/YUI/dragdrop.js | 2940 |
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diff --git a/frontend/beta/js/YUI/dragdrop.js b/frontend/beta/js/YUI/dragdrop.js new file mode 100644 index 0000000..43a0f61 --- a/dev/null +++ b/frontend/beta/js/YUI/dragdrop.js @@ -0,0 +1,2940 @@ +/*
+Copyright (c) 2006, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.net/yui/license.txt
+version: 0.12.0
+*/
+
+(function() {
+
+var Event=YAHOO.util.Event;
+var Dom=YAHOO.util.Dom;
+
+/**
+ * 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, 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 an 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 YAHOO.util.DD}. setDragElId() lets you define
+ * a separate element that would be moved, as in {@link YAHOO.util.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 YAHOO.util.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>
+ * @namespace YAHOO.util
+ * @class DragDrop
+ * @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
+ */
+YAHOO.util.DragDrop = function(id, sGroup, config) {
+ if (id) {
+ this.init(id, sGroup, config);
+ }
+};
+
+YAHOO.util.DragDrop.prototype = {
+
+ /**
+ * 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:
+ * YAHOO.util.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 associative array of HTML tags that will be ignored if clicked.
+ * @property invalidHandleTypes
+ * @type {string: string}
+ */
+ invalidHandleTypes: null,
+
+ /**
+ * An associative array of ids for elements that will be ignored if clicked
+ * @property invalidHandleIds
+ * @type {string: string}
+ */
+ invalidHandleIds: null,
+
+ /**
+ * An indexted array of css class names for elements that will be ignored
+ * if clicked.
+ * @property invalidHandleClasses
+ * @type string[]
+ */
+ 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 {string: string}
+ */
+ 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; },
+
+ /**
+ * Unlock this instace
+ * @method unlock
+ */
+ unlock: function() { this.locked = false; },
+
+ /**
+ * By default, all insances can be a drop target. This can be disabled by
+ * setting isTarget to false.
+ * @method isTarget
+ * @type boolean
+ */
+ isTarget: true,
+
+ /**
+ * The padding configured for this drag and drop object for calculating
+ * the drop zone intersection with this object.
+ * @method padding
+ * @type int[]
+ */
+ padding: null,
+
+ /**
+ * Cached reference to the linked element
+ * @property _domRef
+ * @private
+ */
+ _domRef: null,
+
+ /**
+ * Internal typeof flag
+ * @property __ygDragDrop
+ * @private
+ */
+ __ygDragDrop: true,
+
+ /**
+ * Set to true when horizontal contraints are applied
+ * @property constrainX
+ * @type boolean
+ * @private
+ */
+ constrainX: false,
+
+ /**
+ * Set to true when vertical contraints are applied
+ * @property constrainY
+ * @type boolean
+ * @private
+ */
+ constrainY: false,
+
+ /**
+ * The left constraint
+ * @property minX
+ * @type int
+ * @private
+ */
+ minX: 0,
+
+ /**
+ * The right constraint
+ * @property maxX
+ * @type int
+ * @private
+ */
+ maxX: 0,
+
+ /**
+ * The up constraint
+ * @property minY
+ * @type int
+ * @type int
+ * @private
+ */
+ minY: 0,
+
+ /**
+ * The down constraint
+ * @property maxY
+ * @type int
+ * @private
+ */
+ maxY: 0,
+
+ /**
+ * Maintain offsets when we resetconstraints. Set to true when you want
+ * the position of the element relative to its parent to stay the same
+ * when the page changes
+ *
+ * @property maintainOffset
+ * @type boolean
+ */
+ maintainOffset: false,
+
+ /**
+ * Array of pixel locations the element will snap to if we specified a
+ * horizontal graduation/interval. This array is generated automatically
+ * when you define a tick interval.
+ * @property xTicks
+ * @type int[]
+ */
+ xTicks: null,
+
+ /**
+ * Array of pixel locations the element will snap to if we specified a
+ * vertical graduation/interval. This array is generated automatically
+ * when you define a tick interval.
+ * @property yTicks
+ * @type int[]
+ */
+ yTicks: null,
+
+ /**
+ * By default the drag and drop instance will only respond to the primary
+ * button click (left button for a right-handed mouse). Set to true to
+ * allow drag and drop to start with any mouse click that is propogated
+ * by the browser
+ * @property primaryButtonOnly
+ * @type boolean
+ */
+ primaryButtonOnly: true,
+
+ /**
+ * The availabe property is false until the linked dom element is accessible.
+ * @property available
+ * @type boolean
+ */
+ available: false,
+
+ /**
+ * By default, drags can only be initiated if the mousedown occurs in the
+ * region the linked element is. This is done in part to work around a
+ * bug in some browsers that mis-report the mousedown if the previous
+ * mouseup happened outside of the window. This property is set to true
+ * if outer handles are defined.
+ *
+ * @property hasOuterHandles
+ * @type boolean
+ * @default false
+ */
+ hasOuterHandles: false,
+
+ /**
+ * Code that executes immediately before the startDrag event
+ * @method b4StartDrag
+ * @private
+ */
+ b4StartDrag: function(x, y) { },
+
+ /**
+ * Abstract method called after a drag/drop object is clicked
+ * and the drag or mousedown time thresholds have beeen met.
+ * @method startDrag
+ * @param {int} X click location
+ * @param {int} Y click location
+ */
+ startDrag: function(x, y) { /* override this */ },
+
+ /**
+ * Code that executes immediately before the onDrag event
+ * @method b4Drag
+ * @private
+ */
+ b4Drag: function(e) { },
+
+ /**
+ * Abstract method called during the onMouseMove event while dragging an
+ * object.
+ * @method onDrag
+ * @param {Event} e the mousemove event
+ */
+ onDrag: function(e) { /* override this */ },
+
+ /**
+ * Abstract method called when this element fist begins hovering over
+ * another DragDrop obj
+ * @method onDragEnter
+ * @param {Event} e the mousemove event
+ * @param {String|DragDrop[]} id In POINT mode, the element
+ * id this is hovering over. In INTERSECT mode, an array of one or more
+ * dragdrop items being hovered over.
+ */
+ onDragEnter: function(e, id) { /* override this */ },
+
+ /**
+ * Code that executes immediately before the onDragOver event
+ * @method b4DragOver
+ * @private
+ */
+ b4DragOver: function(e) { },
+
+ /**
+ * Abstract method called when this element is hovering over another
+ * DragDrop obj
+ * @method onDragOver
+ * @param {Event} e the mousemove event
+ * @param {String|DragDrop[]} id In POINT mode, the element
+ * id this is hovering over. In INTERSECT mode, an array of dd items
+ * being hovered over.
+ */
+ onDragOver: function(e, id) { /* override this */ },
+
+ /**
+ * Code that executes immediately before the onDragOut event
+ * @method b4DragOut
+ * @private
+ */
+ b4DragOut: function(e) { },
+
+ /**
+ * Abstract method called when we are no longer hovering over an element
+ * @method onDragOut
+ * @param {Event} e the mousemove event
+ * @param {String|DragDrop[]} id In POINT mode, the element
+ * id this was hovering over. In INTERSECT mode, an array of dd items
+ * that the mouse is no longer over.
+ */
+ onDragOut: function(e, id) { /* override this */ },
+
+ /**
+ * Code that executes immediately before the onDragDrop event
+ * @method b4DragDrop
+ * @private
+ */
+ b4DragDrop: function(e) { },
+
+ /**
+ * Abstract method called when this item is dropped on another DragDrop
+ * obj
+ * @method onDragDrop
+ * @param {Event} e the mouseup event
+ * @param {String|DragDrop[]} id In POINT mode, the element
+ * id this was dropped on. In INTERSECT mode, an array of dd items this
+ * was dropped on.
+ */
+ onDragDrop: function(e, id) { /* override this */ },
+
+ /**
+ * Abstract method called when this item is dropped on an area with no
+ * drop target
+ * @method onInvalidDrop
+ * @param {Event} e the mouseup event
+ */
+ onInvalidDrop: function(e) { /* override this */ },
+
+ /**
+ * Code that executes immediately before the endDrag event
+ * @method b4EndDrag
+ * @private
+ */
+ b4EndDrag: function(e) { },
+
+ /**
+ * Fired when we are done dragging the object
+ * @method endDrag
+ * @param {Event} e the mouseup event
+ */
+ endDrag: function(e) { /* override this */ },
+
+ /**
+ * Code executed immediately before the onMouseDown event
+ * @method b4MouseDown
+ * @param {Event} e the mousedown event
+ * @private
+ */
+ b4MouseDown: function(e) { },
+
+ /**
+ * Event handler that fires when a drag/drop obj gets a mousedown
+ * @method onMouseDown
+ * @param {Event} e the mousedown event
+ */
+ onMouseDown: function(e) { /* override this */ },
+
+ /**
+ * Event handler that fires when a drag/drop obj gets a mouseup
+ * @method onMouseUp
+ * @param {Event} e the mouseup event
+ */
+ onMouseUp: function(e) { /* override this */ },
+
+ /**
+ * Override the onAvailable method to do what is needed after the initial
+ * position was determined.
+ * @method onAvailable
+ */
+ onAvailable: function () {
+ },
+
+ /**
+ * Returns a reference to the linked element
+ * @method getEl
+ * @return {HTMLElement} the html element
+ */
+ getEl: function() {
+ if (!this._domRef) {
+ this._domRef = Dom.get(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 YAHOO.util.DDProxy
+ * @method getDragEl
+ * @return {HTMLElement} the html element
+ */
+ getDragEl: function() {
+ return Dom.get(this.dragElId);
+ },
+
+ /**
+ * Sets up the DragDrop object. Must be called in the constructor of any
+ * YAHOO.util.DragDrop subclass
+ * @method init
+ * @param id the id of the linked element
+ * @param {String} sGroup the group of related items
+ * @param {object} config configuration attributes
+ */
+ init: function(id, sGroup, config) {
+ this.initTarget(id, sGroup, config);
+ Event.on(this.id, "mousedown", this.handleMouseDown, this, true);
+ // Event.on(this.id, "selectstart", Event.preventDefault);
+ },
+
+ /**
+ * Initializes Targeting functionality only... the object does not
+ * get a mousedown handler.
+ * @method initTarget
+ * @param id the id of the linked element
+ * @param {String} sGroup the group of related items
+ * @param {object} config configuration attributes
+ */
+ initTarget: function(id, sGroup, config) {
+
+ // configuration attributes
+ this.config = config || {};
+
+ // create a local reference to the drag and drop manager
+ this.DDM = YAHOO.util.DDM;
+ // initialize the groups array
+ this.groups = {};
+
+ // assume that we have an element reference instead of an id if the
+ // parameter is not a string
+ if (typeof id !== "string") {
+ YAHOO.log("id is not a string, assuming it is an HTMLElement");
+ id = Dom.generateId(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;
+
+ Event.onAvailable(id, this.handleOnAvailable, this, true);
+
+
+ // the linked element is the element that gets dragged by default
+ this.setDragElId(id);
+
+ // by default, clicked anchors will not start drag operations.
+ // @TODO what else should be here? Probably form fields.
+ this.invalidHandleTypes = { A: "A" };
+ this.invalidHandleIds = {};
+ this.invalidHandleClasses = [];
+
+ this.applyConfig();
+ },
+
+ /**
+ * 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 setInitialPosition
+ * @param {int} diffX the X offset, default 0
+ * @param {int} diffY the Y offset, default 0
+ */
+ setInitPosition: function(diffX, diffY) {
+ var el = this.getEl();
+
+ if (!this.DDM.verifyEl(el)) {
+ return;
+ }
+
+ var dx = diffX || 0;
+ var dy = diffY || 0;
+
+ var p = Dom.getXY( el );
+
+ this.initPageX = p[0] - dx;
+ this.initPageY = p[1] - dy;
+
+ this.lastPageX = p[0];
+ this.lastPageY = p[1];
+
+
+ this.setStartPosition(p);
+ },
+
+ /**
+ * Sets the start position of the element. This is set when the obj
+ * is initialized, the reset when a drag is started.
+ * @method setStartPosition
+ * @param pos current position (from previous lookup)
+ * @private
+ */
+ setStartPosition: function(pos) {
+ var p = pos || Dom.getXY( this.getEl() );
+ this.deltaSetXY = null;
+
+ this.startPageX = p[0];
+ this.startPageY = p[1];
+ },
+
+ /**
+ * Add this instance to a group of related drag/drop objects. All
+ * instances belong to at least one group, and can belong to as many
+ * groups as needed.
+ * @method addToGroup
+ * @param sGroup {string} the name of the group
+ */
+ addToGroup: function(sGroup) {
+ this.groups[sGroup] = true;
+ this.DDM.regDragDrop(this, sGroup);
+ },
+
+ /**
+ * Remove's this instance from the supplied interaction group
+ * @method removeFromGroup
+ * @param {string} sGroup The group to drop
+ */
+ removeFromGroup: function(sGroup) {
+ if (this.groups[sGroup]) {
+ delete this.groups[sGroup];
+ }
+
+ this.DDM.removeDDFromGroup(this, sGroup);
+ },
+
+ /**
+ * Allows you to specify that an element other than the linked element
+ * will be moved with the cursor during a drag
+ * @method setDragElId
+ * @param id {string} the id of the element that will be used to initiate the drag
+ */
+ setDragElId: function(id) {
+ this.dragElId = id;
+ },
+
+ /**
+ * Allows you to specify a child of the linked element that should be
+ * used to initiate the drag operation. An example of this would be if
+ * you have a content div with text and links. Clicking anywhere in the
+ * content area would normally start the drag operation. Use this method
+ * to specify that an element inside of the content div is the element
+ * that starts the drag operation.
+ * @method setHandleElId
+ * @param id {string} the id of the element that will be used to
+ * initiate the drag.
+ */
+ setHandleElId: function(id) {
+ if (typeof id !== "string") {
+ YAHOO.log("id is not a string, assuming it is an HTMLElement");
+ id = Dom.generateId(id);
+ }
+ this.handleElId = id;
+ this.DDM.regHandle(this.id, id);
+ },
+
+ /**
+ * Allows you to set an element outside of the linked element as a drag
+ * handle
+ * @method setOuterHandleElId
+ * @param id the id of the element that will be used to initiate the drag
+ */
+ setOuterHandleElId: function(id) {
+ if (typeof id !== "string") {
+ YAHOO.log("id is not a string, assuming it is an HTMLElement");
+ id = Dom.generateId(id);
+ }
+ Event.on(id, "mousedown",
+ this.handleMouseDown, this, true);
+ this.setHandleElId(id);
+
+ this.hasOuterHandles = true;
+ },
+
+ /**
+ * Remove all drag and drop hooks for this element
+ * @method unreg
+ */
+ unreg: function() {
+ Event.removeListener(this.id, "mousedown",
+ this.handleMouseDown);
+ this._domRef = null;
+ this.DDM._remove(this);
+ },
+
+ /**
+ * Returns true if this instance is locked, or the drag drop mgr is locked
+ * (meaning that all drag/drop is disabled on the page.)
+ * @method isLocked
+ * @return {boolean} true if this obj or all drag/drop is locked, else
+ * false
+ */
+ isLocked: function() {
+ return (this.DDM.isLocked() || this.locked);
+ },
+
+ /**
+ * Fired when this object is clicked
+ * @method handleMouseDown
+ * @param {Event} e
+ * @param {YAHOO.util.DragDrop} oDD the clicked dd object (this dd obj)
+ * @private
+ */
+ handleMouseDown: function(e, oDD) {
+
+ var button = e.which || e.button;
+
+ if (this.primaryButtonOnly && button > 1) {
+ return;
+ }
+
+ if (this.isLocked()) {
+ return;
+ }
+
+ this.DDM.refreshCache(this.groups);
+ // var self = this;
+ // setTimeout( function() { self.DDM.refreshCache(self.groups); }, 0);
+
+ // Only process the event if we really clicked within the linked
+ // element. The reason we make this check is that in the case that
+ // another element was moved between the clicked element and the
+ // cursor in the time between the mousedown and mouseup events. When
+ // this happens, the element gets the next mousedown event
+ // regardless of where on the screen it happened.
+ var pt = new YAHOO.util.Point(Event.getPageX(e), Event.getPageY(e));
+ if (!this.hasOuterHandles && !this.DDM.isOverTarget(pt, this) ) {
+ } else {
+ if (this.clickValidator(e)) {
+
+
+ // set the initial element position
+ this.setStartPosition();
+
+
+ this.b4MouseDown(e);
+ this.onMouseDown(e);
+ this.DDM.handleMouseDown(e, this);
+
+ this.DDM.stopEvent(e);
+ } else {
+
+
+ }
+ }
+ },
+
+ clickValidator: function(e) {
+ var target = Event.getTarget(e);
+ return ( this.isValidHandleChild(target) &&
+ (this.id == this.handleElId ||
+ this.DDM.handleWasClicked(target, this.id)) );
+ },
+
+ /**
+ * Allows you to specify a tag name that should not start a drag operation
+ * when clicked. This is designed to facilitate embedding links within a
+ * drag handle that do something other than start the drag.
+ * @method addInvalidHandleType
+ * @param {string} tagName the type of element to exclude
+ */
+ addInvalidHandleType: function(tagName) {
+ var type = tagName.toUpperCase();
+ this.invalidHandleTypes[type] = type;
+ },
+
+ /**
+ * Lets you to specify an element id for a child of a drag handle
+ * that should not initiate a drag
+ * @method addInvalidHandleId
+ * @param {string} id the element id of the element you wish to ignore
+ */
+ addInvalidHandleId: function(id) {
+ if (typeof id !== "string") {
+ YAHOO.log("id is not a string, assuming it is an HTMLElement");
+ id = Dom.generateId(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") {
+ YAHOO.log("id is not a string, assuming it is an HTMLElement");
+ id = Dom.generateId(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 = !Dom.hasClass(node, this.invalidHandleClasses[i]);
+ }
+
+
+ return valid;
+
+ },
+
+ /**
+ * Create the array of horizontal tick marks if an interval was specified
+ * in setXConstraint().
+ * @method setXTicks
+ * @private
+ */
+ setXTicks: function(iStartX, iTickSize) {
+ this.xTicks = [];
+ this.xTickSize = iTickSize;
+
+ var tickMap = {};
+
+ for (var i = this.initPageX; i >= this.minX; i = i - iTickSize) {
+ if (!tickMap[i]) {
+ this.xTicks[this.xTicks.length] = i;
+ tickMap[i] = true;
+ }
+ }
+
+ for (i = this.initPageX; i <= this.maxX; i = i + iTickSize) {
+ if (!tickMap[i]) {
+ this.xTicks[this.xTicks.length] = i;
+ tickMap[i] = true;
+ }
+ }
+
+ this.xTicks.sort(this.DDM.numericSort) ;
+ },
+
+ /**
+ * Create the array of vertical tick marks if an interval was specified in
+ * setYConstraint().
+ * @method setYTicks
+ * @private
+ */
+ setYTicks: function(iStartY, iTickSize) {
+ this.yTicks = [];
+ this.yTickSize = iTickSize;
+
+ var tickMap = {};
+
+ for (var i = this.initPageY; i >= this.minY; i = i - iTickSize) {
+ if (!tickMap[i]) {
+ this.yTicks[this.yTicks.length] = i;
+ tickMap[i] = true;
+ }
+ }
+
+ for (i = this.initPageY; i <= this.maxY; i = i + iTickSize) {
+ if (!tickMap[i]) {
+ this.yTicks[this.yTicks.length] = i;
+ tickMap[i] = true;
+ }
+ }
+
+ this.yTicks.sort(this.DDM.numericSort) ;
+ },
+
+ /**
+ * By default, the element can be dragged any place on the screen. Use
+ * this method to limit the horizontal travel of the element. Pass in
+ * 0,0 for the parameters if you want to lock the drag to the y axis.
+ * @method setXConstraint
+ * @param {int} iLeft the number of pixels the element can move to the left
+ * @param {int} iRight the number of pixels the element can move to the
+ * right
+ * @param {int} iTickSize optional parameter for specifying that the
+ * element
+ * should move iTickSize pixels at a time.
+ */
+ setXConstraint: function(iLeft, iRight, iTickSize) {
+ this.leftConstraint = iLeft;
+ this.rightConstraint = iRight;
+
+ this.minX = this.initPageX - iLeft;
+ this.maxX = this.initPageX + iRight;
+ if (iTickSize) { this.setXTicks(this.initPageX, iTickSize); }
+
+ this.constrainX = true;
+ },
+
+ /**
+ * Clears any constraints applied to this instance. Also clears ticks
+ * since they can't exist independent of a constraint at this time.
+ * @method clearConstraints
+ */
+ clearConstraints: function() {
+ this.constrainX = false;
+ this.constrainY = false;
+ this.clearTicks();
+ },
+
+ /**
+ * Clears any tick interval defined for this instance
+ * @method clearTicks
+ */
+ clearTicks: function() {
+ this.xTicks = null;
+ this.yTicks = null;
+ this.xTickSize = 0;
+ this.yTickSize = 0;
+ },
+
+ /**
+ * By default, the element can be dragged any place on the screen. Set
+ * this to limit the vertical travel of the element. Pass in 0,0 for the
+ * parameters if you want to lock the drag to the x axis.
+ * @method setYConstraint
+ * @param {int} iUp the number of pixels the element can move up
+ * @param {int} iDown the number of pixels the element can move down
+ * @param {int} iTickSize optional parameter for specifying that the
+ * element should move iTickSize pixels at a time.
+ */
+ setYConstraint: function(iUp, iDown, iTickSize) {
+ this.topConstraint = iUp;
+ this.bottomConstraint = iDown;
+
+ this.minY = this.initPageY - iUp;
+ this.maxY = this.initPageY + iDown;
+ if (iTickSize) { this.setYTicks(this.initPageY, iTickSize); }
+
+ this.constrainY = true;
+
+ },
+
+ /**
+ * resetConstraints must be called if you manually reposition a dd element.
+ * @method resetConstraints
+ * @param {boolean} maintainOffset
+ */
+ resetConstraints: function() {
+
+
+ // Maintain offsets if necessary
+ if (this.initPageX || this.initPageX === 0) {
+ // figure out how much this thing has moved
+ var dx = (this.maintainOffset) ? this.lastPageX - this.initPageX : 0;
+ var dy = (this.maintainOffset) ? this.lastPageY - this.initPageY : 0;
+
+ this.setInitPosition(dx, dy);
+
+ // This is the first time we have detected the element's position
+ } else {
+ this.setInitPosition();
+ }
+
+ if (this.constrainX) {
+ this.setXConstraint( this.leftConstraint,
+ this.rightConstraint,
+ this.xTickSize );
+ }
+
+ if (this.constrainY) {
+ this.setYConstraint( this.topConstraint,
+ this.bottomConstraint,
+ this.yTickSize );
+ }
+ },
+
+ /**
+ * Normally the drag element is moved pixel by pixel, but we can specify
+ * that it move a number of pixels at a time. This method resolves the
+ * location when we have it set up like this.
+ * @method getTick
+ * @param {int} val where we want to place the object
+ * @param {int[]} tickArray sorted array of valid points
+ * @return {int} the closest tick
+ * @private
+ */
+ getTick: function(val, tickArray) {
+
+ if (!tickArray) {
+ // If tick interval is not defined, it is effectively 1 pixel,
+ // so we return the value passed to us.
+ return val;
+ } else if (tickArray[0] >= val) {
+ // The value is lower than the first tick, so we return the first
+ // tick.
+ return tickArray[0];
+ } else {
+ for (var i=0, len=tickArray.length; i<len; ++i) {
+ var next = i + 1;
+ if (tickArray[next] && tickArray[next] >= val) {
+ var diff1 = val - tickArray[i];
+ var diff2 = tickArray[next] - val;
+ return (diff2 > diff1) ? tickArray[i] : tickArray[next];
+ }
+ }
+
+ // The value is larger than the last tick, so we return the last
+ // tick.
+ return tickArray[tickArray.length - 1];
+ }
+ },
+
+ /**
+ * toString method
+ * @method toString
+ * @return {string} string representation of the dd obj
+ */
+ toString: function() {
+ return ("DragDrop " + this.id);
+ }
+
+};
+
+})();
+/**
+ * The drag and drop utility provides a framework for building drag and drop
+ * applications. In addition to enabling drag and drop for specific elements,
+ * the drag and drop elements are tracked by the manager class, and the
+ * interactions between the various elements are tracked during the drag and
+ * the implementing code is notified about these important moments.
+ * @module dragdrop
+ * @title Drag and Drop
+ * @requires yahoo,dom,event
+ * @namespace YAHOO.util
+ */
+
+// Only load the library once. Rewriting the manager class would orphan
+// existing drag and drop instances.
+if (!YAHOO.util.DragDropMgr) {
+
+/**
+ * DragDropMgr is a singleton that tracks the element interaction for
+ * all DragDrop items in the window. Generally, you will not call
+ * this class directly, but it does have helper methods that could
+ * be useful in your DragDrop implementations.
+ * @class DragDropMgr
+ * @static
+ */
+YAHOO.util.DragDropMgr = function() {
+
+ var Event = YAHOO.util.Event;
+
+ return {
+
+ /**
+ * Two dimensional Array of registered DragDrop objects. The first
+ * dimension is the DragDrop item group, the second the DragDrop
+ * object.
+ * @property ids
+ * @type {string: string}
+ * @private
+ * @static
+ */
+ ids: {},
+
+ /**
+ * Array of element ids defined as drag handles. Used to determine
+ * if the element that generated the mousedown event is actually the
+ * handle and not the html element itself.
+ * @property handleIds
+ * @type {string: string}
+ * @private
+ * @static
+ */
+ handleIds: {},
+
+ /**
+ * the DragDrop object that is currently being dragged
+ * @property dragCurrent
+ * @type DragDrop
+ * @private
+ * @static
+ **/
+ dragCurrent: null,
+
+ /**
+ * the DragDrop object(s) that are being hovered over
+ * @property dragOvers
+ * @type Array
+ * @private
+ * @static
+ */
+ dragOvers: {},
+
+ /**
+ * the X distance between the cursor and the object being dragged
+ * @property deltaX
+ * @type int
+ * @private
+ * @static
+ */
+ deltaX: 0,
+
+ /**
+ * the Y distance between the cursor and the object being dragged
+ * @property deltaY
+ * @type int
+ * @private
+ * @static
+ */
+ deltaY: 0,
+
+ /**
+ * Flag to determine if we should prevent the default behavior of the
+ * events we define. By default this is true, but this can be set to
+ * false if you need the default behavior (not recommended)
+ * @property preventDefault
+ * @type boolean
+ * @static
+ */
+ preventDefault: true,
+
+ /**
+ * Flag to determine if we should stop the propagation of the events
+ * we generate. This is true by default but you may want to set it to
+ * false if the html element contains other features that require the
+ * mouse click.
+ * @property stopPropagation
+ * @type boolean
+ * @static
+ */
+ stopPropagation: true,
+
+ /**
+ * Internal flag that is set to true when drag and drop has been
+ * intialized
+ * @property initialized
+ * @private
+ * @static
+ */
+ initalized: false,
+
+ /**
+ * All drag and drop can be disabled.
+ * @property locked
+ * @private
+ * @static
+ */
+ locked: false,
+
+ /**
+ * Called the first time an element is registered.
+ * @method init
+ * @private
+ * @static
+ */
+ init: function() {
+ this.initialized = true;
+ },
+
+ /**
+ * In point mode, drag and drop interaction is defined by the
+ * location of the cursor during the drag/drop
+ * @property POINT
+ * @type int
+ * @static
+ */
+ POINT: 0,
+
+ /**
+ * In intersect mode, drag and drop interactio nis defined by the
+ * overlap of two or more drag and drop objects.
+ * @property INTERSECT
+ * @type int
+ * @static
+ */
+ INTERSECT: 1,
+
+ /**
+ * The current drag and drop mode. Default: POINT
+ * @property mode
+ * @type int
+ * @static
+ */
+ mode: 0,
+
+ /**
+ * Runs method on all drag and drop objects
+ * @method _execOnAll
+ * @private
+ * @static
+ */
+ _execOnAll: function(sMethod, args) {
+ for (var i in this.ids) {
+ for (var j in this.ids[i]) {
+ var oDD = this.ids[i][j];
+ if (! this.isTypeOfDD(oDD)) {
+ continue;
+ }
+ oDD[sMethod].apply(oDD, args);
+ }
+ }
+ },
+
+ /**
+ * Drag and drop initialization. Sets up the global event handlers
+ * @method _onLoad
+ * @private
+ * @static
+ */
+ _onLoad: function() {
+
+ this.init();
+
+
+ Event.on(document, "mouseup", this.handleMouseUp, this, true);
+ Event.on(document, "mousemove", this.handleMouseMove, this, true);
+ Event.on(window, "unload", this._onUnload, this, true);
+ Event.on(window, "resize", this._onResize, this, true);
+ // Event.on(window, "mouseout", this._test);
+
+ },
+
+ /**
+ * Reset constraints on all drag and drop objs
+ * @method _onResize
+ * @private
+ * @static
+ */
+ _onResize: function(e) {
+ this._execOnAll("resetConstraints", []);
+ },
+
+ /**
+ * Lock all drag and drop functionality
+ * @method lock
+ * @static
+ */
+ lock: function() { this.locked = true; },
+
+ /**
+ * Unlock all drag and drop functionality
+ * @method unlock
+ * @static
+ */
+ unlock: function() { this.locked = false; },
+
+ /**
+ * Is drag and drop locked?
+ * @method isLocked
+ * @return {boolean} True if drag and drop is locked, false otherwise.
+ * @static
+ */
+ isLocked: function() { return this.locked; },
+
+ /**
+ * Location cache that is set for all drag drop objects when a drag is
+ * initiated, cleared when the drag is finished.
+ * @property locationCache
+ * @private
+ * @static
+ */
+ locationCache: {},
+
+ /**
+ * Set useCache to false if you want to force object the lookup of each
+ * drag and drop linked element constantly during a drag.
+ * @property useCache
+ * @type boolean
+ * @static
+ */
+ useCache: true,
+
+ /**
+ * The number of pixels that the mouse needs to move after the
+ * mousedown before the drag is initiated. Default=3;
+ * @property clickPixelThresh
+ * @type int
+ * @static
+ */
+ clickPixelThresh: 3,
+
+ /**
+ * The number of milliseconds after the mousedown event to initiate the
+ * drag if we don't get a mouseup event. Default=1000
+ * @property clickTimeThresh
+ * @type int
+ * @static
+ */
+ clickTimeThresh: 1000,
+
+ /**
+ * Flag that indicates that either the drag pixel threshold or the
+ * mousdown time threshold has been met
+ * @property dragThreshMet
+ * @type boolean
+ * @private
+ * @static
+ */
+ dragThreshMet: false,
+
+ /**
+ * Timeout used for the click time threshold
+ * @property clickTimeout
+ * @type Object
+ * @private
+ * @static
+ */
+ clickTimeout: null,
+
+ /**
+ * The X position of the mousedown event stored for later use when a
+ * drag threshold is met.
+ * @property startX
+ * @type int
+ * @private
+ * @static
+ */
+ startX: 0,
+
+ /**
+ * The Y position of the mousedown event stored for later use when a
+ * drag threshold is met.
+ * @property startY
+ * @type int
+ * @private
+ * @static
+ */
+ startY: 0,
+
+ /**
+ * Each DragDrop instance must be registered with the DragDropMgr.
+ * This is executed in DragDrop.init()
+ * @method regDragDrop
+ * @param {DragDrop} oDD the DragDrop object to register
+ * @param {String} sGroup the name of the group this element belongs to
+ * @static
+ */
+ regDragDrop: function(oDD, sGroup) {
+ if (!this.initialized) { this.init(); }
+
+ if (!this.ids[sGroup]) {
+ this.ids[sGroup] = {};
+ }
+ this.ids[sGroup][oDD.id] = oDD;
+ },
+
+ /**
+ * Removes the supplied dd instance from the supplied group. Executed
+ * by DragDrop.removeFromGroup, so don't call this function directly.
+ * @method removeDDFromGroup
+ * @private
+ * @static
+ */
+ removeDDFromGroup: function(oDD, sGroup) {
+ if (!this.ids[sGroup]) {
+ this.ids[sGroup] = {};
+ }
+
+ var obj = this.ids[sGroup];
+ if (obj && obj[oDD.id]) {
+ delete obj[oDD.id];
+ }
+ },
+
+ /**
+ * Unregisters a drag and drop item. This is executed in
+ * DragDrop.unreg, use that method instead of calling this directly.
+ * @method _remove
+ * @private
+ * @static
+ */
+ _remove: function(oDD) {
+ for (var g in oDD.groups) {
+ if (g && this.ids[g][oDD.id]) {
+ delete this.ids[g][oDD.id];
+ }
+ }
+ delete this.handleIds[oDD.id];
+ },
+
+ /**
+ * Each DragDrop handle element must be registered. This is done
+ * automatically when executing DragDrop.setHandleElId()
+ * @method regHandle
+ * @param {String} sDDId the DragDrop id this element is a handle for
+ * @param {String} sHandleId the id of the element that is the drag
+ * handle
+ * @static
+ */
+ regHandle: function(sDDId, sHandleId) {
+ if (!this.handleIds[sDDId]) {
+ this.handleIds[sDDId] = {};
+ }
+ this.handleIds[sDDId][sHandleId] = sHandleId;
+ },
+
+ /**
+ * Utility function to determine if a given element has been
+ * registered as a drag drop item.
+ * @method isDragDrop
+ * @param {String} id the element id to check
+ * @return {boolean} true if this element is a DragDrop item,
+ * false otherwise
+ * @static
+ */
+ isDragDrop: function(id) {
+ return ( this.getDDById(id) ) ? true : false;
+ },
+
+ /**
+ * Returns the drag and drop instances that are in all groups the
+ * passed in instance belongs to.
+ * @method getRelated
+ * @param {DragDrop} p_oDD the obj to get related data for
+ * @param {boolean} bTargetsOnly if true, only return targetable objs
+ * @return {DragDrop[]} the related instances
+ * @static
+ */
+ getRelated: function(p_oDD, bTargetsOnly) {
+ var oDDs = [];
+ for (var i in p_oDD.groups) {
+ for (j in this.ids[i]) {
+ var dd = this.ids[i][j];
+ if (! this.isTypeOfDD(dd)) {
+ continue;
+ }
+ if (!bTargetsOnly || dd.isTarget) {
+ oDDs[oDDs.length] = dd;
+ }
+ }
+ }
+
+ return oDDs;
+ },
+
+ /**
+ * Returns true if the specified dd target is a legal target for
+ * the specifice drag obj
+ * @method isLegalTarget
+ * @param {DragDrop} the drag obj
+ * @param {DragDrop} the target
+ * @return {boolean} true if the target is a legal target for the
+ * dd obj
+ * @static
+ */
+ isLegalTarget: function (oDD, oTargetDD) {
+ var targets = this.getRelated(oDD, true);
+ for (var i=0, len=targets.length;i<len;++i) {
+ if (targets[i].id == oTargetDD.id) {
+ return true;
+ }
+ }
+
+ return false;
+ },
+
+ /**
+ * My goal is to be able to transparently determine if an object is
+ * typeof DragDrop, and the exact subclass of DragDrop. typeof
+ * returns "object", oDD.constructor.toString() always returns
+ * "DragDrop" and not the name of the subclass. So for now it just
+ * evaluates a well-known variable in DragDrop.
+ * @method isTypeOfDD
+ * @param {Object} the object to evaluate
+ * @return {boolean} true if typeof oDD = DragDrop
+ * @static
+ */
+ isTypeOfDD: function (oDD) {
+ return (oDD && oDD.__ygDragDrop);
+ },
+
+ /**
+ * Utility function to determine if a given element has been
+ * registered as a drag drop handle for the given Drag Drop object.
+ * @method isHandle
+ * @param {String} id the element id to check
+ * @return {boolean} true if this element is a DragDrop handle, false
+ * otherwise
+ * @static
+ */
+ isHandle: function(sDDId, sHandleId) {
+ return ( this.handleIds[sDDId] &&
+ this.handleIds[sDDId][sHandleId] );
+ },
+
+ /**
+ * Returns the DragDrop instance for a given id
+ * @method getDDById
+ * @param {String} id the id of the DragDrop object
+ * @return {DragDrop} the drag drop object, null if it is not found
+ * @static
+ */
+ getDDById: function(id) {
+ for (var i in this.ids) {
+ if (this.ids[i][id]) {
+ return this.ids[i][id];
+ }
+ }
+ return null;
+ },
+
+ /**
+ * Fired after a registered DragDrop object gets the mousedown event.
+ * Sets up the events required to track the object being dragged
+ * @method handleMouseDown
+ * @param {Event} e the event
+ * @param oDD the DragDrop object being dragged
+ * @private
+ * @static
+ */
+ handleMouseDown: function(e, oDD) {
+
+ this.currentTarget = YAHOO.util.Event.getTarget(e);
+
+ this.dragCurrent = oDD;
+
+ var el = oDD.getEl();
+
+ // track start position
+ this.startX = YAHOO.util.Event.getPageX(e);
+ this.startY = YAHOO.util.Event.getPageY(e);
+
+ this.deltaX = this.startX - el.offsetLeft;
+ this.deltaY = this.startY - el.offsetTop;
+
+ this.dragThreshMet = false;
+
+ this.clickTimeout = setTimeout(
+ function() {
+ var DDM = YAHOO.util.DDM;
+ DDM.startDrag(DDM.startX, DDM.startY);
+ },
+ this.clickTimeThresh );
+ },
+
+ /**
+ * Fired when either the drag pixel threshol or the mousedown hold
+ * time threshold has been met.
+ * @method startDrag
+ * @param x {int} the X position of the original mousedown
+ * @param y {int} the Y position of the original mousedown
+ * @static
+ */
+ startDrag: function(x, y) {
+ clearTimeout(this.clickTimeout);
+ if (this.dragCurrent) {
+ this.dragCurrent.b4StartDrag(x, y);
+ this.dragCurrent.startDrag(x, y);
+ }
+ this.dragThreshMet = true;
+ },
+
+ /**
+ * Internal function to handle the mouseup event. Will be invoked
+ * from the context of the document.
+ * @method handleMouseUp
+ * @param {Event} e the event
+ * @private
+ * @static
+ */
+ handleMouseUp: function(e) {
+
+ if (! this.dragCurrent) {
+ return;
+ }
+
+ clearTimeout(this.clickTimeout);
+
+ if (this.dragThreshMet) {
+ this.fireEvents(e, true);
+ } else {
+ }
+
+ this.stopDrag(e);
+
+ this.stopEvent(e);
+ },
+
+ /**
+ * Utility to stop event propagation and event default, if these
+ * features are turned on.
+ * @method stopEvent
+ * @param {Event} e the event as returned by this.getEvent()
+ * @static
+ */
+ stopEvent: function(e) {
+ if (this.stopPropagation) {
+ YAHOO.util.Event.stopPropagation(e);
+ }
+
+ if (this.preventDefault) {
+ YAHOO.util.Event.preventDefault(e);
+ }
+ },
+
+ /**
+ * Internal function to clean up event handlers after the drag
+ * operation is complete
+ * @method stopDrag
+ * @param {Event} e the event
+ * @private
+ * @static
+ */
+ stopDrag: function(e) {
+
+ // Fire the drag end event for the item that was dragged
+ if (this.dragCurrent) {
+ if (this.dragThreshMet) {
+ this.dragCurrent.b4EndDrag(e);
+ this.dragCurrent.endDrag(e);
+ }
+
+ this.dragCurrent.onMouseUp(e);
+ }
+
+ this.dragCurrent = null;
+ this.dragOvers = {};
+ },
+
+ /**
+ * Internal function to handle the mousemove event. Will be invoked
+ * from the context of the html element.
+ *
+ * @TODO figure out what we can do about mouse events lost when the
+ * user drags objects beyond the window boundary. Currently we can
+ * detect this in internet explorer by verifying that the mouse is
+ * down during the mousemove event. Firefox doesn't give us the
+ * button state on the mousemove event.
+ * @method handleMouseMove
+ * @param {Event} e the event
+ * @private
+ * @static
+ */
+ handleMouseMove: function(e) {
+ if (! this.dragCurrent) {
+ return true;
+ }
+
+ // var button = e.which || e.button;
+
+ // check for IE mouseup outside of page boundary
+ if (YAHOO.util.Event.isIE && !e.button) {
+ this.stopEvent(e);
+ return this.handleMouseUp(e);
+ }
+
+ if (!this.dragThreshMet) {
+ var diffX = Math.abs(this.startX - YAHOO.util.Event.getPageX(e));
+ var diffY = Math.abs(this.startY - YAHOO.util.Event.getPageY(e));
+ if (diffX > this.clickPixelThresh ||
+ diffY > this.clickPixelThresh) {
+ this.startDrag(this.startX, this.startY);
+ }
+ }
+
+ if (this.dragThreshMet) {
+ this.dragCurrent.b4Drag(e);
+ this.dragCurrent.onDrag(e);
+ this.fireEvents(e, false);
+ }
+
+ this.stopEvent(e);
+
+ return true;
+ },
+
+ /**
+ * Iterates over all of the DragDrop elements to find ones we are
+ * hovering over or dropping on
+ * @method fireEvents
+ * @param {Event} e the event
+ * @param {boolean} isDrop is this a drop op or a mouseover op?
+ * @private
+ * @static
+ */
+ fireEvents: function(e, isDrop) {
+ var dc = this.dragCurrent;
+
+ // If the user did the mouse up outside of the window, we could
+ // get here even though we have ended the drag.
+ if (!dc || dc.isLocked()) {
+ return;
+ }
+
+ var x = YAHOO.util.Event.getPageX(e);
+ var y = YAHOO.util.Event.getPageY(e);
+ var pt = new YAHOO.util.Point(x,y);
+
+ // cache the previous dragOver array
+ var oldOvers = [];
+
+ var outEvts = [];
+ var overEvts = [];
+ var dropEvts = [];
+ var enterEvts = [];
+
+ // Check to see if the object(s) we were hovering over is no longer
+ // being hovered over so we can fire the onDragOut event
+ for (var i in this.dragOvers) {
+
+ var ddo = this.dragOvers[i];
+
+ if (! this.isTypeOfDD(ddo)) {
+ continue;
+ }
+
+ if (! this.isOverTarget(pt, ddo, this.mode)) {
+ outEvts.push( ddo );
+ }
+
+ oldOvers[i] = true;
+ delete this.dragOvers[i];
+ }
+
+ for (var sGroup in dc.groups) {
+
+ if ("string" != typeof sGroup) {
+ continue;
+ }
+
+ for (i in this.ids[sGroup]) {
+ var oDD = this.ids[sGroup][i];
+ if (! this.isTypeOfDD(oDD)) {
+ continue;
+ }
+
+ if (oDD.isTarget && !oDD.isLocked() && oDD != dc) {
+ if (this.isOverTarget(pt, oDD, this.mode)) {
+ // look for drop interactions
+ if (isDrop) {
+ dropEvts.push( oDD );
+ // look for drag enter and drag over interactions
+ } else {
+
+ // initial drag over: dragEnter fires
+ if (!oldOvers[oDD.id]) {
+ enterEvts.push( oDD );
+ // subsequent drag overs: dragOver fires
+ } else {
+ overEvts.push( oDD );
+ }
+
+ this.dragOvers[oDD.id] = oDD;
+ }
+ }
+ }
+ }
+ }
+
+ if (this.mode) {
+ if (outEvts.length) {
+ dc.b4DragOut(e, outEvts);
+ dc.onDragOut(e, outEvts);
+ }
+
+ if (enterEvts.length) {
+ dc.onDragEnter(e, enterEvts);
+ }
+
+ if (overEvts.length) {
+ dc.b4DragOver(e, overEvts);
+ dc.onDragOver(e, overEvts);
+ }
+
+ if (dropEvts.length) {
+ dc.b4DragDrop(e, dropEvts);
+ dc.onDragDrop(e, dropEvts);
+ }
+
+ } else {
+ // fire dragout events
+ var len = 0;
+ for (i=0, len=outEvts.length; i<len; ++i) {
+ dc.b4DragOut(e, outEvts[i].id);
+ dc.onDragOut(e, outEvts[i].id);
+ }
+
+ // fire enter events
+ for (i=0,len=enterEvts.length; i<len; ++i) {
+ // dc.b4DragEnter(e, oDD.id);
+ dc.onDragEnter(e, enterEvts[i].id);
+ }
+
+ // fire over events
+ for (i=0,len=overEvts.length; i<len; ++i) {
+ dc.b4DragOver(e, overEvts[i].id);
+ dc.onDragOver(e, overEvts[i].id);
+ }
+
+ // fire drop events
+ for (i=0, len=dropEvts.length; i<len; ++i) {
+ dc.b4DragDrop(e, dropEvts[i].id);
+ dc.onDragDrop(e, dropEvts[i].id);
+ }
+
+ }
+
+ // notify about a drop that did not find a target
+ if (isDrop && !dropEvts.length) {
+ dc.onInvalidDrop(e);
+ }
+
+ },
+
+ /**
+ * Helper function for getting the best match from the list of drag
+ * and drop objects returned by the drag and drop events when we are
+ * in INTERSECT mode. It returns either the first object that the
+ * cursor is over, or the object that has the greatest overlap with
+ * the dragged element.
+ * @method getBestMatch
+ * @param {DragDrop[]} dds The array of drag and drop objects
+ * targeted
+ * @return {DragDrop} The best single match
+ * @static
+ */
+ getBestMatch: function(dds) {
+ var winner = null;
+ // Return null if the input is not what we expect
+ //if (!dds || !dds.length || dds.length == 0) {
+ // winner = null;
+ // If there is only one item, it wins
+ //} else if (dds.length == 1) {
+
+ var len = dds.length;
+
+ if (len == 1) {
+ winner = dds[0];
+ } else {
+ // Loop through the targeted items
+ for (var i=0; i<len; ++i) {
+ var dd = dds[i];
+ // If the cursor is over the object, it wins. If the
+ // cursor is over multiple matches, the first one we come
+ // to wins.
+ if (dd.cursorIsOver) {
+ winner = dd;
+ break;
+ // Otherwise the object with the most overlap wins
+ } else {
+ if (!winner ||
+ winner.overlap.getArea() < dd.overlap.getArea()) {
+ winner = dd;
+ }
+ }
+ }
+ }
+
+ return winner;
+ },
+
+ /**
+ * Refreshes the cache of the top-left and bottom-right points of the
+ * drag and drop objects in the specified group(s). This is in the
+ * format that is stored in the drag and drop instance, so typical
+ * usage is:
+ * <code>
+ * YAHOO.util.DragDropMgr.refreshCache(ddinstance.groups);
+ * </code>
+ * Alternatively:
+ * <code>
+ * YAHOO.util.DragDropMgr.refreshCache({group1:true, group2:true});
+ * </code>
+ * @TODO this really should be an indexed array. Alternatively this
+ * method could accept both.
+ * @method refreshCache
+ * @param {Object} groups an associative array of groups to refresh
+ * @static
+ */
+ refreshCache: function(groups) {
+ for (var sGroup in groups) {
+ if ("string" != typeof sGroup) {
+ continue;
+ }
+ for (var i in this.ids[sGroup]) {
+ var oDD = this.ids[sGroup][i];
+
+ if (this.isTypeOfDD(oDD)) {
+ // if (this.isTypeOfDD(oDD) && oDD.isTarget) {
+ var loc = this.getLocation(oDD);
+ if (loc) {
+ this.locationCache[oDD.id] = loc;
+ } else {
+ delete this.locationCache[oDD.id];
+ // this will unregister the drag and drop object if
+ // the element is not in a usable state
+ // oDD.unreg();
+ }
+ }
+ }
+ }
+ },
+
+ /**
+ * This checks to make sure an element exists and is in the DOM. The
+ * main purpose is to handle cases where innerHTML is used to remove
+ * drag and drop objects from the DOM. IE provides an 'unspecified
+ * error' when trying to access the offsetParent of such an element
+ * @method verifyEl
+ * @param {HTMLElement} el the element to check
+ * @return {boolean} true if the element looks usable
+ * @static
+ */
+ verifyEl: function(el) {
+ try {
+ if (el) {
+ var parent = el.offsetParent;
+ if (parent) {
+ return true;
+ }
+ }
+ } catch(e) {
+ }
+
+ return false;
+ },
+
+ /**
+ * Returns a Region object containing the drag and drop element's position
+ * and size, including the padding configured for it
+ * @method getLocation
+ * @param {DragDrop} oDD the drag and drop object to get the
+ * location for
+ * @return {YAHOO.util.Region} a Region object representing the total area
+ * the element occupies, including any padding
+ * the instance is configured for.
+ * @static
+ */
+ getLocation: function(oDD) {
+ if (! this.isTypeOfDD(oDD)) {
+ return null;
+ }
+
+ var el = oDD.getEl(), pos, x1, x2, y1, y2, t, r, b, l;
+
+ try {
+ pos= YAHOO.util.Dom.getXY(el);
+ } catch (e) { }
+
+ if (!pos) {
+ return null;
+ }
+
+ x1 = pos[0];
+ x2 = x1 + el.offsetWidth;
+ y1 = pos[1];
+ y2 = y1 + el.offsetHeight;
+
+ t = y1 - oDD.padding[0];
+ r = x2 + oDD.padding[1];
+ b = y2 + oDD.padding[2];
+ l = x1 - oDD.padding[3];
+
+ return new YAHOO.util.Region( t, r, b, l );
+ },
+
+ /**
+ * Checks the cursor location to see if it over the target
+ * @method isOverTarget
+ * @param {YAHOO.util.Point} pt The point to evaluate
+ * @param {DragDrop} oTarget the DragDrop object we are inspecting
+ * @return {boolean} true if the mouse is over the target
+ * @private
+ * @static
+ */
+ isOverTarget: function(pt, oTarget, intersect) {
+ // use cache if available
+ var loc = this.locationCache[oTarget.id];
+ if (!loc || !this.useCache) {
+ loc = this.getLocation(oTarget);
+ this.locationCache[oTarget.id] = loc;
+
+ }
+
+ if (!loc) {
+ return false;
+ }
+
+ oTarget.cursorIsOver = loc.contains( pt );
+
+ // DragDrop is using this as a sanity check for the initial mousedown
+ // in this case we are done. In POINT mode, if the drag obj has no
+ // contraints, we are also done. Otherwise we need to evaluate the
+ // location of the target as related to the actual location of the
+ // dragged element.
+ var dc = this.dragCurrent;
+ if (!dc || !dc.getTargetCoord ||
+ (!intersect && !dc.constrainX && !dc.constrainY)) {
+ return oTarget.cursorIsOver;
+ }
+
+ oTarget.overlap = null;
+
+ // Get the current location of the drag element, this is the
+ // location of the mouse event less the delta that represents
+ // where the original mousedown happened on the element. We
+ // need to consider constraints and ticks as well.
+ var pos = dc.getTargetCoord(pt.x, pt.y);
+
+ var el = dc.getDragEl();
+ var curRegion = new YAHOO.util.Region( pos.y,
+ pos.x + el.offsetWidth,
+ pos.y + el.offsetHeight,
+ pos.x );
+
+ var overlap = curRegion.intersect(loc);
+
+ if (overlap) {
+ oTarget.overlap = overlap;
+ return (intersect) ? true : oTarget.cursorIsOver;
+ } else {
+ return false;
+ }
+ },
+
+ /**
+ * unload event handler
+ * @method _onUnload
+ * @private
+ * @static
+ */
+ _onUnload: function(e, me) {
+ this.unregAll();
+ },
+
+ /**
+ * Cleans up the drag and drop events and objects.
+ * @method unregAll
+ * @private
+ * @static
+ */
+ unregAll: function() {
+
+ if (this.dragCurrent) {
+ this.stopDrag();
+ this.dragCurrent = null;
+ }
+
+ this._execOnAll("unreg", []);
+
+ for (i in this.elementCache) {
+ delete this.elementCache[i];
+ }
+
+ this.elementCache = {};
+ this.ids = {};
+ },
+
+ /**
+ * A cache of DOM elements
+ * @property elementCache
+ * @private
+ * @static
+ */
+ elementCache: {},
+
+ /**
+ * Get the wrapper for the DOM element specified
+ * @method getElWrapper
+ * @param {String} id the id of the element to get
+ * @return {YAHOO.util.DDM.ElementWrapper} the wrapped element
+ * @private
+ * @deprecated This wrapper isn't that useful
+ * @static
+ */
+ getElWrapper: function(id) {
+ var oWrapper = this.elementCache[id];
+ if (!oWrapper || !oWrapper.el) {
+ oWrapper = this.elementCache[id] =
+ new this.ElementWrapper(YAHOO.util.Dom.get(id));
+ }
+ return oWrapper;
+ },
+
+ /**
+ * Returns the actual DOM element
+ * @method getElement
+ * @param {String} id the id of the elment to get
+ * @return {Object} The element
+ * @deprecated use YAHOO.util.Dom.get instead
+ * @static
+ */
+ getElement: function(id) {
+ return YAHOO.util.Dom.get(id);
+ },
+
+ /**
+ * Returns the style property for the DOM element (i.e.,
+ * document.getElById(id).style)
+ * @method getCss
+ * @param {String} id the id of the elment to get
+ * @return {Object} The style property of the element
+ * @deprecated use YAHOO.util.Dom instead
+ * @static
+ */
+ getCss: function(id) {
+ var el = YAHOO.util.Dom.get(id);
+ return (el) ? el.style : null;
+ },
+
+ /**
+ * Inner class for cached elements
+ * @class DragDropMgr.ElementWrapper
+ * @for DragDropMgr
+ * @private
+ * @deprecated
+ */
+ ElementWrapper: function(el) {
+ /**
+ * The element
+ * @property el
+ */
+ this.el = el || null;
+ /**
+ * The element id
+ * @property id
+ */
+ this.id = this.el && el.id;
+ /**
+ * A reference to the style property
+ * @property css
+ */
+ this.css = this.el && el.style;
+ },
+
+ /**
+ * Returns the X position of an html element
+ * @method getPosX
+ * @param el the element for which to get the position
+ * @return {int} the X coordinate
+ * @for DragDropMgr
+ * @deprecated use YAHOO.util.Dom.getX instead
+ * @static
+ */
+ getPosX: function(el) {
+ return YAHOO.util.Dom.getX(el);
+ },
+
+ /**
+ * Returns the Y position of an html element
+ * @method getPosY
+ * @param el the element for which to get the position
+ * @return {int} the Y coordinate
+ * @deprecated use YAHOO.util.Dom.getY instead
+ * @static
+ */
+ getPosY: function(el) {
+ return YAHOO.util.Dom.getY(el);
+ },
+
+ /**
+ * Swap two nodes. In IE, we use the native method, for others we
+ * emulate the IE behavior
+ * @method swapNode
+ * @param n1 the first node to swap
+ * @param n2 the other node to swap
+ * @static
+ */
+ swapNode: function(n1, n2) {
+ if (n1.swapNode) {
+ n1.swapNode(n2);
+ } else {
+ var p = n2.parentNode;
+ var s = n2.nextSibling;
+
+ if (s == n1) {
+ p.insertBefore(n1, n2);
+ } else if (n2 == n1.nextSibling) {
+ p.insertBefore(n2, n1);
+ } else {
+ n1.parentNode.replaceChild(n2, n1);
+ p.insertBefore(n1, s);
+ }
+ }
+ },
+
+ /**
+ * Returns the current scroll position
+ * @method getScroll
+ * @private
+ * @static
+ */
+ getScroll: function () {
+ var t, l, dde=document.documentElement, db=document.body;
+ if (dde && (dde.scrollTop || dde.scrollLeft)) {
+ t = dde.scrollTop;
+ l = dde.scrollLeft;
+ } else if (db) {
+ t = db.scrollTop;
+ l = db.scrollLeft;
+ } else {
+ YAHOO.log("could not get scroll property");
+ }
+ return { top: t, left: l };
+ },
+
+ /**
+ * Returns the specified element style property
+ * @method getStyle
+ * @param {HTMLElement} el the element
+ * @param {string} styleProp the style property
+ * @return {string} The value of the style property
+ * @deprecated use YAHOO.util.Dom.getStyle
+ * @static
+ */
+ getStyle: function(el, styleProp) {
+ return YAHOO.util.Dom.getStyle(el, styleProp);
+ },
+
+ /**
+ * Gets the scrollTop
+ * @method getScrollTop
+ * @return {int} the document's scrollTop
+ * @static
+ */
+ getScrollTop: function () { return this.getScroll().top; },
+
+ /**
+ * Gets the scrollLeft
+ * @method getScrollLeft
+ * @return {int} the document's scrollTop
+ * @static
+ */
+ getScrollLeft: function () { return this.getScroll().left; },
+
+ /**
+ * Sets the x/y position of an element to the location of the
+ * target element.
+ * @method moveToEl
+ * @param {HTMLElement} moveEl The element to move
+ * @param {HTMLElement} targetEl The position reference element
+ * @static
+ */
+ moveToEl: function (moveEl, targetEl) {
+ var aCoord = YAHOO.util.Dom.getXY(targetEl);
+ YAHOO.util.Dom.setXY(moveEl, aCoord);
+ },
+
+ /**
+ * Gets the client height
+ * @method getClientHeight
+ * @return {int} client height in px
+ * @deprecated use YAHOO.util.Dom.getViewportHeight instead
+ * @static
+ */
+ getClientHeight: function() {
+ return YAHOO.util.Dom.getViewportHeight();
+ },
+
+ /**
+ * Gets the client width
+ * @method getClientWidth
+ * @return {int} client width in px
+ * @deprecated use YAHOO.util.Dom.getViewportWidth instead
+ * @static
+ */
+ getClientWidth: function() {
+ return YAHOO.util.Dom.getViewportWidth();
+ },
+
+ /**
+ * Numeric array sort function
+ * @method numericSort
+ * @static
+ */
+ numericSort: function(a, b) { return (a - b); },
+
+ /**
+ * Internal counter
+ * @property _timeoutCount
+ * @private
+ * @static
+ */
+ _timeoutCount: 0,
+
+ /**
+ * Trying to make the load order less important. Without this we get
+ * an error if this file is loaded before the Event Utility.
+ * @method _addListeners
+ * @private
+ * @static
+ */
+ _addListeners: function() {
+ var DDM = YAHOO.util.DDM;
+ if ( YAHOO.util.Event && document ) {
+ DDM._onLoad();
+ } else {
+ if (DDM._timeoutCount > 2000) {
+ } else {
+ setTimeout(DDM._addListeners, 10);
+ if (document && document.body) {
+ DDM._timeoutCount += 1;
+ }
+ }
+ }
+ },
+
+ /**
+ * Recursively searches the immediate parent and all child nodes for
+ * the handle element in order to determine wheter or not it was
+ * clicked.
+ * @method handleWasClicked
+ * @param node the html element to inspect
+ * @static
+ */
+ handleWasClicked: function(node, id) {
+ if (this.isHandle(id, node.id)) {
+ return true;
+ } else {
+ // check to see if this is a text node child of the one we want
+ var p = node.parentNode;
+
+ while (p) {
+ if (this.isHandle(id, p.id)) {
+ return true;
+ } else {
+ p = p.parentNode;
+ }
+ }
+ }
+
+ return false;
+ }
+
+ };
+
+}();
+
+// shorter alias, save a few bytes
+YAHOO.util.DDM = YAHOO.util.DragDropMgr;
+YAHOO.util.DDM._addListeners();
+
+}
+
+/**
+ * A DragDrop implementation where the linked element follows the
+ * mouse cursor during a drag.
+ * @class DD
+ * @extends YAHOO.util.DragDrop
+ * @constructor
+ * @param {String} id the id of the linked element
+ * @param {String} sGroup the group of related DragDrop items
+ * @param {object} config an object containing configurable attributes
+ * Valid properties for DD:
+ * scroll
+ */
+YAHOO.util.DD = function(id, sGroup, config) {
+ if (id) {
+ this.init(id, sGroup, config);
+ }
+};
+
+YAHOO.extend(YAHOO.util.DD, YAHOO.util.DragDrop, {
+
+ /**
+ * When set to true, the utility automatically tries to scroll the browser
+ * window wehn a drag and drop element is dragged near the viewport boundary.
+ * Defaults to true.
+ * @property scroll
+ * @type boolean
+ */
+ scroll: true,
+
+ /**
+ * Sets the pointer offset to the distance between the linked element's top
+ * left corner and the location the element was clicked
+ * @method autoOffset
+ * @param {int} iPageX the X coordinate of the click
+ * @param {int} iPageY the Y coordinate of the click
+ */
+ autoOffset: function(iPageX, iPageY) {
+ var x = iPageX - this.startPageX;
+ var y = iPageY - this.startPageY;
+ this.setDelta(x, y);
+ },
+
+ /**
+ * Sets the pointer offset. You can call this directly to force the
+ * offset to be in a particular location (e.g., pass in 0,0 to set it
+ * to the center of the object, as done in YAHOO.widget.Slider)
+ * @method setDelta
+ * @param {int} iDeltaX the distance from the left
+ * @param {int} iDeltaY the distance from the top
+ */
+ setDelta: function(iDeltaX, iDeltaY) {
+ this.deltaX = iDeltaX;
+ this.deltaY = iDeltaY;
+ },
+
+ /**
+ * Sets the drag element to the location of the mousedown or click event,
+ * maintaining the cursor location relative to the location on the element
+ * that was clicked. Override this if you want to place the element in a
+ * location other than where the cursor is.
+ * @method setDragElPos
+ * @param {int} iPageX the X coordinate of the mousedown or drag event
+ * @param {int} iPageY the Y coordinate of the mousedown or drag event
+ */
+ setDragElPos: function(iPageX, iPageY) {
+ // the first time we do this, we are going to check to make sure
+ // the element has css positioning
+
+ var el = this.getDragEl();
+ this.alignElWithMouse(el, iPageX, iPageY);
+ },
+
+ /**
+ * Sets the element to the location of the mousedown or click event,
+ * maintaining the cursor location relative to the location on the element
+ * that was clicked. Override this if you want to place the element in a
+ * location other than where the cursor is.
+ * @method alignElWithMouse
+ * @param {HTMLElement} el the element to move
+ * @param {int} iPageX the X coordinate of the mousedown or drag event
+ * @param {int} iPageY the Y coordinate of the mousedown or drag event
+ */
+ alignElWithMouse: function(el, iPageX, iPageY) {
+ var oCoord = this.getTargetCoord(iPageX, iPageY);
+
+ if (!this.deltaSetXY) {
+ var aCoord = [oCoord.x, oCoord.y];
+ YAHOO.util.Dom.setXY(el, aCoord);
+ var newLeft = parseInt( YAHOO.util.Dom.getStyle(el, "left"), 10 );
+ var newTop = parseInt( YAHOO.util.Dom.getStyle(el, "top" ), 10 );
+
+ this.deltaSetXY = [ newLeft - oCoord.x, newTop - oCoord.y ];
+ } else {
+ YAHOO.util.Dom.setStyle(el, "left", (oCoord.x + this.deltaSetXY[0]) + "px");
+ YAHOO.util.Dom.setStyle(el, "top", (oCoord.y + this.deltaSetXY[1]) + "px");
+ }
+
+ this.cachePosition(oCoord.x, oCoord.y);
+ this.autoScroll(oCoord.x, oCoord.y, el.offsetHeight, el.offsetWidth);
+ },
+
+ /**
+ * Saves the most recent position so that we can reset the constraints and
+ * tick marks on-demand. We need to know this so that we can calculate the
+ * number of pixels the element is offset from its original position.
+ * @method cachePosition
+ * @param iPageX the current x position (optional, this just makes it so we
+ * don't have to look it up again)
+ * @param iPageY the current y position (optional, this just makes it so we
+ * don't have to look it up again)
+ */
+ cachePosition: function(iPageX, iPageY) {
+ if (iPageX) {
+ this.lastPageX = iPageX;
+ this.lastPageY = iPageY;
+ } else {
+ var aCoord = YAHOO.util.Dom.getXY(this.getEl());
+ this.lastPageX = aCoord[0];
+ this.lastPageY = aCoord[1];
+ }
+ },
+
+ /**
+ * Auto-scroll the window if the dragged object has been moved beyond the
+ * visible window boundary.
+ * @method autoScroll
+ * @param {int} x the drag element's x position
+ * @param {int} y the drag element's y position
+ * @param {int} h the height of the drag element
+ * @param {int} w the width of the drag element
+ * @private
+ */
+ autoScroll: function(x, y, h, w) {
+
+ if (this.scroll) {
+ // The client height
+ var clientH = this.DDM.getClientHeight();
+
+ // The client width
+ var clientW = this.DDM.getClientWidth();
+
+ // The amt scrolled down
+ var st = this.DDM.getScrollTop();
+
+ // The amt scrolled right
+ var sl = this.DDM.getScrollLeft();
+
+ // Location of the bottom of the element
+ var bot = h + y;
+
+ // Location of the right of the element
+ var right = w + x;
+
+ // The distance from the cursor to the bottom of the visible area,
+ // adjusted so that we don't scroll if the cursor is beyond the
+ // element drag constraints
+ var toBot = (clientH + st - y - this.deltaY);
+
+ // The distance from the cursor to the right of the visible area
+ var toRight = (clientW + sl - x - this.deltaX);
+
+
+ // How close to the edge the cursor must be before we scroll
+ // var thresh = (document.all) ? 100 : 40;
+ var thresh = 40;
+
+ // How many pixels to scroll per autoscroll op. This helps to reduce
+ // clunky scrolling. IE is more sensitive about this ... it needs this
+ // value to be higher.
+ var scrAmt = (document.all) ? 80 : 30;
+
+ // Scroll down if we are near the bottom of the visible page and the
+ // obj extends below the crease
+ if ( bot > clientH && toBot < thresh ) {
+ window.scrollTo(sl, st + scrAmt);
+ }
+
+ // Scroll up if the window is scrolled down and the top of the object
+ // goes above the top border
+ if ( y < st && st > 0 && y - st < thresh ) {
+ window.scrollTo(sl, st - scrAmt);
+ }
+
+ // Scroll right if the obj is beyond the right border and the cursor is
+ // near the border.
+ if ( right > clientW && toRight < thresh ) {
+ window.scrollTo(sl + scrAmt, st);
+ }
+
+ // Scroll left if the window has been scrolled to the right and the obj
+ // extends past the left border
+ if ( x < sl && sl > 0 && x - sl < thresh ) {
+ window.scrollTo(sl - scrAmt, st);
+ }
+ }
+ },
+
+ /**
+ * Finds the location the element should be placed if we want to move
+ * it to where the mouse location less the click offset would place us.
+ * @method getTargetCoord
+ * @param {int} iPageX the X coordinate of the click
+ * @param {int} iPageY the Y coordinate of the click
+ * @return an object that contains the coordinates (Object.x and Object.y)
+ * @private
+ */
+ getTargetCoord: function(iPageX, iPageY) {
+
+
+ var x = iPageX - this.deltaX;
+ var y = iPageY - this.deltaY;
+
+ if (this.constrainX) {
+ if (x < this.minX) { x = this.minX; }
+ if (x > this.maxX) { x = this.maxX; }
+ }
+
+ if (this.constrainY) {
+ if (y < this.minY) { y = this.minY; }
+ if (y > this.maxY) { y = this.maxY; }
+ }
+
+ x = this.getTick(x, this.xTicks);
+ y = this.getTick(y, this.yTicks);
+
+
+ return {x:x, y:y};
+ },
+
+ /*
+ * Sets up config options specific to this class. Overrides
+ * YAHOO.util.DragDrop, but all versions of this method through the
+ * inheritance chain are called
+ */
+ applyConfig: function() {
+ YAHOO.util.DD.superclass.applyConfig.call(this);
+ this.scroll = (this.config.scroll !== false);
+ },
+
+ /*
+ * Event that fires prior to the onMouseDown event. Overrides
+ * YAHOO.util.DragDrop.
+ */
+ b4MouseDown: function(e) {
+ // this.resetConstraints();
+ this.autoOffset(YAHOO.util.Event.getPageX(e),
+ YAHOO.util.Event.getPageY(e));
+ },
+
+ /*
+ * Event that fires prior to the onDrag event. Overrides
+ * YAHOO.util.DragDrop.
+ */
+ b4Drag: function(e) {
+ this.setDragElPos(YAHOO.util.Event.getPageX(e),
+ YAHOO.util.Event.getPageY(e));
+ },
+
+ toString: function() {
+ return ("DD " + this.id);
+ }
+
+ //////////////////////////////////////////////////////////////////////////
+ // Debugging ygDragDrop events that can be overridden
+ //////////////////////////////////////////////////////////////////////////
+ /*
+ startDrag: function(x, y) {
+ },
+
+ onDrag: function(e) {
+ },
+
+ onDragEnter: function(e, id) {
+ },
+
+ onDragOver: function(e, id) {
+ },
+
+ onDragOut: function(e, id) {
+ },
+
+ onDragDrop: function(e, id) {
+ },
+
+ endDrag: function(e) {
+ }
+
+ */
+
+});
+/**
+ * A DragDrop implementation that inserts an empty, bordered div into
+ * the document that follows the cursor during drag operations. At the time of
+ * the click, the frame div is resized to the dimensions of the linked html
+ * element, and moved to the exact location of the linked element.
+ *
+ * References to the "frame" element refer to the single proxy element that
+ * was created to be dragged in place of all DDProxy elements on the
+ * page.
+ *
+ * @class DDProxy
+ * @extends YAHOO.util.DD
+ * @constructor
+ * @param {String} id the id of the linked html element
+ * @param {String} sGroup the group of related DragDrop objects
+ * @param {object} config an object containing configurable attributes
+ * Valid properties for DDProxy in addition to those in DragDrop:
+ * resizeFrame, centerFrame, dragElId
+ */
+YAHOO.util.DDProxy = function(id, sGroup, config) {
+ if (id) {
+ this.init(id, sGroup, config);
+ this.initFrame();
+ }
+};
+
+/**
+ * The default drag frame div id
+ * @property YAHOO.util.DDProxy.dragElId
+ * @type String
+ * @static
+ */
+YAHOO.util.DDProxy.dragElId = "ygddfdiv";
+
+YAHOO.extend(YAHOO.util.DDProxy, YAHOO.util.DD, {
+
+ /**
+ * By default we resize the drag frame to be the same size as the element
+ * we want to drag (this is to get the frame effect). We can turn it off
+ * if we want a different behavior.
+ * @property resizeFrame
+ * @type boolean
+ */
+ resizeFrame: true,
+
+ /**
+ * By default the frame is positioned exactly where the drag element is, so
+ * we use the cursor offset provided by YAHOO.util.DD. Another option that works only if
+ * you do not have constraints on the obj is to have the drag frame centered
+ * around the cursor. Set centerFrame to true for this effect.
+ * @property centerFrame
+ * @type boolean
+ */
+ centerFrame: false,
+
+ /**
+ * Creates the proxy element if it does not yet exist
+ * @method createFrame
+ */
+ createFrame: function() {
+ var self = this;
+ var body = document.body;
+
+ if (!body || !body.firstChild) {
+ setTimeout( function() { self.createFrame(); }, 50 );
+ return;
+ }
+
+ var div = this.getDragEl();
+
+ if (!div) {
+ div = document.createElement("div");
+ div.id = this.dragElId;
+ var s = div.style;
+
+ s.position = "absolute";
+ s.visibility = "hidden";
+ s.cursor = "move";
+ s.border = "2px solid #aaa";
+ s.zIndex = 999;
+
+ // appendChild can blow up IE if invoked prior to the window load event
+ // while rendering a table. It is possible there are other scenarios
+ // that would cause this to happen as well.
+ body.insertBefore(div, body.firstChild);
+ }
+ },
+
+ /**
+ * Initialization for the drag frame element. Must be called in the
+ * constructor of all subclasses
+ * @method initFrame
+ */
+ initFrame: function() {
+ this.createFrame();
+ },
+
+ applyConfig: function() {
+ YAHOO.util.DDProxy.superclass.applyConfig.call(this);
+
+ this.resizeFrame = (this.config.resizeFrame !== false);
+ this.centerFrame = (this.config.centerFrame);
+ this.setDragElId(this.config.dragElId || YAHOO.util.DDProxy.dragElId);
+ },
+
+ /**
+ * Resizes the drag frame to the dimensions of the clicked object, positions
+ * it over the object, and finally displays it
+ * @method showFrame
+ * @param {int} iPageX X click position
+ * @param {int} iPageY Y click position
+ * @private
+ */
+ showFrame: function(iPageX, iPageY) {
+ var el = this.getEl();
+ var dragEl = this.getDragEl();
+ var s = dragEl.style;
+
+ this._resizeProxy();
+
+ if (this.centerFrame) {
+ this.setDelta( Math.round(parseInt(s.width, 10)/2),
+ Math.round(parseInt(s.height, 10)/2) );
+ }
+
+ this.setDragElPos(iPageX, iPageY);
+
+ YAHOO.util.Dom.setStyle(dragEl, "visibility", "visible");
+ },
+
+ /**
+ * The proxy is automatically resized to the dimensions of the linked
+ * element when a drag is initiated, unless resizeFrame is set to false
+ * @method _resizeProxy
+ * @private
+ */
+ _resizeProxy: function() {
+ if (this.resizeFrame) {
+ var DOM = YAHOO.util.Dom;
+ var el = this.getEl();
+ var dragEl = this.getDragEl();
+
+ var bt = parseInt( DOM.getStyle(dragEl, "borderTopWidth" ), 10);
+ var br = parseInt( DOM.getStyle(dragEl, "borderRightWidth" ), 10);
+ var bb = parseInt( DOM.getStyle(dragEl, "borderBottomWidth" ), 10);
+ var bl = parseInt( DOM.getStyle(dragEl, "borderLeftWidth" ), 10);
+
+ if (isNaN(bt)) { bt = 0; }
+ if (isNaN(br)) { br = 0; }
+ if (isNaN(bb)) { bb = 0; }
+ if (isNaN(bl)) { bl = 0; }
+
+
+ var newWidth = Math.max(0, el.offsetWidth - br - bl);
+ var newHeight = Math.max(0, el.offsetHeight - bt - bb);
+
+
+ DOM.setStyle( dragEl, "width", newWidth + "px" );
+ DOM.setStyle( dragEl, "height", newHeight + "px" );
+ }
+ },
+
+ // overrides YAHOO.util.DragDrop
+ b4MouseDown: function(e) {
+ var x = YAHOO.util.Event.getPageX(e);
+ var y = YAHOO.util.Event.getPageY(e);
+ this.autoOffset(x, y);
+ this.setDragElPos(x, y);
+ },
+
+ // overrides YAHOO.util.DragDrop
+ b4StartDrag: function(x, y) {
+ // show the drag frame
+ this.showFrame(x, y);
+ },
+
+ // overrides YAHOO.util.DragDrop
+ b4EndDrag: function(e) {
+ YAHOO.util.Dom.setStyle(this.getDragEl(), "visibility", "hidden");
+ },
+
+ // overrides YAHOO.util.DragDrop
+ // By default we try to move the element to the last location of the frame.
+ // This is so that the default behavior mirrors that of YAHOO.util.DD.
+ endDrag: function(e) {
+ var DOM = YAHOO.util.Dom;
+ var lel = this.getEl();
+ var del = this.getDragEl();
+
+ // Show the drag frame briefly so we can get its position
+ // del.style.visibility = "";
+ DOM.setStyle(del, "visibility", "");
+
+ // Hide the linked element before the move to get around a Safari
+ // rendering bug.
+ //lel.style.visibility = "hidden";
+ DOM.setStyle(lel, "visibility", "hidden");
+ YAHOO.util.DDM.moveToEl(lel, del);
+ //del.style.visibility = "hidden";
+ DOM.setStyle(del, "visibility", "hidden");
+ //lel.style.visibility = "";
+ DOM.setStyle(lel, "visibility", "");
+ },
+
+ toString: function() {
+ return ("DDProxy " + this.id);
+ }
+
+});
+/**
+ * A DragDrop implementation that does not move, but can be a drop
+ * target. You would get the same result by simply omitting implementation
+ * for the event callbacks, but this way we reduce the processing cost of the
+ * event listener and the callbacks.
+ * @class DDTarget
+ * @extends YAHOO.util.DragDrop
+ * @constructor
+ * @param {String} id the id of the element that is a drop target
+ * @param {String} sGroup the group of related DragDrop objects
+ * @param {object} config an object containing configurable attributes
+ * Valid properties for DDTarget in addition to those in
+ * DragDrop:
+ * none
+ */
+YAHOO.util.DDTarget = function(id, sGroup, config) {
+ if (id) {
+ this.initTarget(id, sGroup, config);
+ }
+};
+
+// YAHOO.util.DDTarget.prototype = new YAHOO.util.DragDrop();
+YAHOO.extend(YAHOO.util.DDTarget, YAHOO.util.DragDrop, {
+ toString: function() {
+ return ("DDTarget " + this.id);
+ }
+});
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