/* Copyright (c) 2008, Yahoo! Inc. All rights reserved. Code licensed under the BSD License: http://developer.yahoo.net/yui/license.txt version: 2.6.0 */ /** * 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, Dom = YAHOO.util.Dom; return { /** * This property is used to turn on global use of the shim element on all DragDrop instances, defaults to false for backcompat. (Use: YAHOO.util.DDM.useShim = true) * @property useShim * @type Boolean * @static */ useShim: false, /** * This property is used to determine if the shim is active over the screen, default false. * @private * @property _shimActive * @type Boolean * @static */ _shimActive: false, /** * This property is used when useShim is set on a DragDrop object to store the current state of DDM.useShim so it can be reset when a drag operation is done. * @private * @property _shimState * @type Boolean * @static */ _shimState: false, /** * This property is used when useShim is set to true, it will set the opacity on the shim to .5 for debugging. Use: (YAHOO.util.DDM._debugShim = true;) * @private * @property _debugShim * @type Boolean * @static */ _debugShim: false, /** * This method will create a shim element (giving it the id of yui-ddm-shim), it also attaches the mousemove and mouseup listeners to it and attaches a scroll listener on the window * @private * @method _sizeShim * @static */ _createShim: function() { var s = document.createElement('div'); s.id = 'yui-ddm-shim'; if (document.body.firstChild) { document.body.insertBefore(s, document.body.firstChild); } else { document.body.appendChild(s); } s.style.display = 'none'; s.style.backgroundColor = 'red'; s.style.position = 'absolute'; s.style.zIndex = '99999'; Dom.setStyle(s, 'opacity', '0'); this._shim = s; Event.on(s, "mouseup", this.handleMouseUp, this, true); Event.on(s, "mousemove", this.handleMouseMove, this, true); Event.on(window, 'scroll', this._sizeShim, this, true); }, /** * This method will size the shim, called from activate and on window scroll event * @private * @method _sizeShim * @static */ _sizeShim: function() { if (this._shimActive) { var s = this._shim; s.style.height = Dom.getDocumentHeight() + 'px'; s.style.width = Dom.getDocumentWidth() + 'px'; s.style.top = '0'; s.style.left = '0'; } }, /** * This method will create the shim element if needed, then show the shim element, size the element and set the _shimActive property to true * @private * @method _activateShim * @static */ _activateShim: function() { if (this.useShim) { if (!this._shim) { this._createShim(); } this._shimActive = true; var s = this._shim, o = '0'; if (this._debugShim) { o = '.5'; } Dom.setStyle(s, 'opacity', o); this._sizeShim(); s.style.display = 'block'; } }, /** * This method will hide the shim element and set the _shimActive property to false * @private * @method _deactivateShim * @static */ _deactivateShim: function() { this._shim.style.display = 'none'; this._shimActive = false; }, /** * The HTML element created to use as a shim over the document to track mouse movements * @private * @property _shim * @type HTMLElement * @static */ _shim: null, /** * 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 * initialized * @property initialized * @private * @static */ initialized: false, /** * All drag and drop can be disabled. * @property locked * @private * @static */ locked: false, /** * Provides additional information about the the current set of * interactions. Can be accessed from the event handlers. It * contains the following properties: * * out: onDragOut interactions * enter: onDragEnter interactions * over: onDragOver interactions * drop: onDragDrop interactions * point: The location of the cursor * draggedRegion: The location of dragged element at the time * of the interaction * sourceRegion: The location of the source elemtn at the time * of the interaction * validDrop: boolean * @property interactionInfo * @type object * @static */ interactionInfo: null, /** * 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 * @final */ POINT: 0, /** * In intersect mode, drag and drop interaction is defined by the * cursor position or the amount of overlap of two or more drag and * drop objects. * @property INTERSECT * @type int * @static * @final */ INTERSECT: 1, /** * In intersect mode, drag and drop interaction is defined only by the * overlap of two or more drag and drop objects. * @property STRICT_INTERSECT * @type int * @static * @final */ STRICT_INTERSECT: 2, /** * 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, /** * Flag to determine if the drag event was fired from the click timeout and * not the mouse move threshold. * @property fromTimeout * @type boolean * @private * @static */ fromTimeout: false, /** * 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) { var item = this.ids[g]; if (item && item[oDD.id]) { delete item[oDD.id]; } } } delete this.handleIds[oDD.id]; }, /** * Each DragDrop handle element must be registered. This is done * automatically when executing DragDrop.setHandleElId() * @method regHandle * @param {String} sDDId the DragDrop id this element is a handle for * @param {String} sHandleId the id of the element that is the drag * handle * @static */ regHandle: function(sDDId, sHandleId) { if (!this.handleIds[sDDId]) { this.handleIds[sDDId] = {}; } this.handleIds[sDDId][sHandleId] = sHandleId; }, /** * Utility function to determine if a given element has been * registered as a drag drop item. * @method isDragDrop * @param {String} id the element id to check * @return {boolean} true if this element is a DragDrop item, * false otherwise * @static */ isDragDrop: function(id) { return ( this.getDDById(id) ) ? true : false; }, /** * Returns the drag and drop instances that are in all groups the * passed in instance belongs to. * @method getRelated * @param {DragDrop} p_oDD the obj to get related data for * @param {boolean} bTargetsOnly if true, only return targetable objs * @return {DragDrop[]} the related instances * @static */ getRelated: function(p_oDD, bTargetsOnly) { var oDDs = []; for (var i in p_oDD.groups) { for (var j in this.ids[i]) { var dd = this.ids[i][j]; if (! this.isTypeOfDD(dd)) { continue; } if (!bTargetsOnly || dd.isTarget) { oDDs[oDDs.length] = dd; } } } return oDDs; }, /** * Returns true if the specified dd target is a legal target for * the specifice drag obj * @method isLegalTarget * @param {DragDrop} the drag obj * @param {DragDrop} the target * @return {boolean} true if the target is a legal target for the * dd obj * @static */ isLegalTarget: function (oDD, oTargetDD) { var targets = this.getRelated(oDD, true); for (var i=0, len=targets.length;i this.clickPixelThresh || diffY > this.clickPixelThresh) { this.startDrag(this.startX, this.startY); } } if (this.dragThreshMet) { if (dc && dc.events.b4Drag) { dc.b4Drag(e); dc.fireEvent('b4DragEvent', { e: e}); } if (dc && dc.events.drag) { dc.onDrag(e); dc.fireEvent('dragEvent', { e: e}); } if (dc) { this.fireEvents(e, false); } } this.stopEvent(e); } }, /** * 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 the config option dragOnly is true, bail out and don't fire the events if (!dc || dc.isLocked() || dc.dragOnly) { return; } var x = YAHOO.util.Event.getPageX(e), y = YAHOO.util.Event.getPageY(e), pt = new YAHOO.util.Point(x,y), pos = dc.getTargetCoord(pt.x, pt.y), el = dc.getDragEl(), events = ['out', 'over', 'drop', 'enter'], curRegion = new YAHOO.util.Region( pos.y, pos.x + el.offsetWidth, pos.y + el.offsetHeight, pos.x ), oldOvers = [], // cache the previous dragOver array inGroupsObj = {}, inGroups = [], data = { outEvts: [], overEvts: [], dropEvts: [], 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, curRegion)) { data.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, curRegion)) { inGroupsObj[sGroup] = true; // look for drop interactions if (isDrop) { data.dropEvts.push( oDD ); // look for drag enter and drag over interactions } else { // initial drag over: dragEnter fires if (!oldOvers[oDD.id]) { data.enterEvts.push( oDD ); // subsequent drag overs: dragOver fires } else { data.overEvts.push( oDD ); } this.dragOvers[oDD.id] = oDD; } } } } } this.interactionInfo = { out: data.outEvts, enter: data.enterEvts, over: data.overEvts, drop: data.dropEvts, point: pt, draggedRegion: curRegion, sourceRegion: this.locationCache[dc.id], validDrop: isDrop }; for (var inG in inGroupsObj) { inGroups.push(inG); } // notify about a drop that did not find a target if (isDrop && !data.dropEvts.length) { this.interactionInfo.validDrop = false; if (dc.events.invalidDrop) { dc.onInvalidDrop(e); dc.fireEvent('invalidDropEvent', { e: e }); } } for (i = 0; i < events.length; i++) { var tmp = null; if (data[events[i] + 'Evts']) { tmp = data[events[i] + 'Evts']; } if (tmp && tmp.length) { var type = events[i].charAt(0).toUpperCase() + events[i].substr(1), ev = 'onDrag' + type, b4 = 'b4Drag' + type, cev = 'drag' + type + 'Event', check = 'drag' + type; if (this.mode) { if (dc.events[b4]) { dc[b4](e, tmp, inGroups); dc.fireEvent(b4 + 'Event', { event: e, info: tmp, group: inGroups }); } if (dc.events[check]) { dc[ev](e, tmp, inGroups); dc.fireEvent(cev, { event: e, info: tmp, group: inGroups }); } } else { for (var b = 0, len = tmp.length; b < len; ++b) { if (dc.events[b4]) { dc[b4](e, tmp[b].id, inGroups[0]); dc.fireEvent(b4 + 'Event', { event: e, info: tmp[b].id, group: inGroups[0] }); } if (dc.events[check]) { dc[ev](e, tmp[b].id, inGroups[0]); dc.fireEvent(cev, { event: e, info: tmp[b].id, group: inGroups[0] }); } } } } } }, /** * 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; var len = dds.length; if (len == 1) { winner = dds[0]; } else { // Loop through the targeted items for (var i=0; i * YAHOO.util.DragDropMgr.refreshCache(ddinstance.groups); * * Alternatively: * * YAHOO.util.DragDropMgr.refreshCache({group1:true, group2:true}); * * @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) { // refresh everything if group array is not provided var g = groups || this.ids; for (var sGroup in g) { if ("string" != typeof sGroup) { continue; } for (var i in this.ids[sGroup]) { var oDD = this.ids[sGroup][i]; if (this.isTypeOfDD(oDD)) { var loc = this.getLocation(oDD); if (loc) { this.locationCache[oDD.id] = loc; } else { delete this.locationCache[oDD.id]; } } } } }, /** * 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 * @param {boolean} intersect true if we are in intersect mode * @param {YAHOO.util.Region} pre-cached location of the dragged element * @return {boolean} true if the mouse is over the target * @private * @static */ isOverTarget: function(pt, oTarget, intersect, curRegion) { // 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 done. Otherwise we need to evaluate the // region the target as occupies to determine if the dragged element // overlaps with it. var dc = this.dragCurrent; if (!dc || (!intersect && !dc.constrainX && !dc.constrainY)) { //if (oTarget.cursorIsOver) { //} 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. if (!curRegion) { var pos = dc.getTargetCoord(pt.x, pt.y); var el = dc.getDragEl(); 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 (var i in this.elementCache) { //delete this.elementCache[i]; //} //this.elementCache = {}; this.ids = {}; }, /** * A cache of DOM elements * @property elementCache * @private * @static * @deprecated elements are not cached now */ 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 { } 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(); } (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: * * 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: * 
 *  dd = new YAHOO.util.DragDrop("div1", "group1");
 *
* 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... * 
 *  dd.onDragDrop = function(e, id) {
 *    alert("dd was dropped on " + id);
 *  }
 *
* @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 = { /** * An Object Literal containing the events that we will be using: mouseDown, b4MouseDown, mouseUp, b4StartDrag, startDrag, b4EndDrag, endDrag, mouseUp, drag, b4Drag, invalidDrop, b4DragOut, dragOut, dragEnter, b4DragOver, dragOver, b4DragDrop, dragDrop * By setting any of these to false, then event will not be fired. * @property events * @type object */ events: null, /** * @method on * @description Shortcut for EventProvider.subscribe, see YAHOO.util.EventProvider.subscribe */ on: function() { this.subscribe.apply(this, arguments); }, /** * 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 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[] */ padding: null, /** * If this flag is true, do not fire drop events. The element is a drag only element (for movement not dropping) * @property dragOnly * @type Boolean */ dragOnly: false, /** * If this flag is true, a shim will be placed over the screen/viewable area to track mouse events. Should help with dragging elements over iframes and other controls. * @property useShim * @type Boolean */ useShim: false, /** * 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, /** * The difference between the click position and the source element's location * @property deltaX * @type int * @private */ deltaX: 0, /** * The difference between the click position and the source element's location * @property deltaY * @type int * @private */ deltaY: 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, /** * Property that is assigned to a drag and drop object when testing to * see if it is being targeted by another dd object. This property * can be used in intersect mode to help determine the focus of * the mouse interaction. DDM.getBestMatch uses this property first to * determine the closest match in INTERSECT mode when multiple targets * are part of the same interaction. * @property cursorIsOver * @type boolean */ cursorIsOver: false, /** * Property that is assigned to a drag and drop object when testing to * see if it is being targeted by another dd object. This is a region * that represents the area the draggable element overlaps this target. * DDM.getBestMatch uses this property to compare the size of the overlap * to that of other targets in order to determine the closest match in * INTERSECT mode when multiple targets are part of the same interaction. * @property overlap * @type YAHOO.util.Region */ overlap: null, /** * 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._domRef || this.id, "mousedown", this.handleMouseDown, this, true); // Event.on(this.id, "selectstart", Event.preventDefault); for (var i in this.events) { this.createEvent(i + 'Event'); } }, /** * 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 || {}; this.events = {}; // create a local reference to the drag and drop manager this.DDM = YAHOO.util.DDM; // initialize the groups object this.groups = {}; // assume that we have an element reference instead of an id if the // parameter is not a string if (typeof id !== "string") { this._domRef = id; 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() { this.events = { mouseDown: true, b4MouseDown: true, mouseUp: true, b4StartDrag: true, startDrag: true, b4EndDrag: true, endDrag: true, drag: true, b4Drag: true, invalidDrop: true, b4DragOut: true, dragOut: true, dragEnter: true, b4DragOver: true, dragOver: true, b4DragDrop: true, dragDrop: true }; if (this.config.events) { for (var i in this.config.events) { if (this.config.events[i] === false) { this.events[i] = false; } } } // 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); this.dragOnly = ((this.config.dragOnly === true) ? true : false); this.useShim = ((this.config.useShim === true) ? true : 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 * @private */ setInitPosition: function(diffX, diffY) { var el = this.getEl(); if (!this.DDM.verifyEl(el)) { if (el && el.style && (el.style.display == 'none')) { } else { } return; } var dx = diffX || 0; var dy = diffY || 0; var p = Dom.getXY( el ); this.initPageX = p[0] - dx; this.initPageY = p[1] - dy; this.lastPageX = p[0]; this.lastPageY = p[1]; this.setStartPosition(p); }, /** * Sets the start position of the element. This is set when the obj * is initialized, the reset when a drag is started. * @method setStartPosition * @param pos current position (from previous lookup) * @private */ setStartPosition: function(pos) { var p = pos || Dom.getXY(this.getEl()); this.deltaSetXY = null; this.startPageX = p[0]; this.startPageY = p[1]; }, /** * Add this instance to a group of related drag/drop objects. All * instances belong to at least one group, and can belong to as many * groups as needed. * @method addToGroup * @param sGroup {string} the name of the group */ addToGroup: function(sGroup) { this.groups[sGroup] = true; this.DDM.regDragDrop(this, sGroup); }, /** * Remove's this instance from the supplied interaction group * @method removeFromGroup * @param {string} sGroup The group to drop */ removeFromGroup: function(sGroup) { if (this.groups[sGroup]) { delete this.groups[sGroup]; } this.DDM.removeDDFromGroup(this, sGroup); }, /** * Allows you to specify that an element other than the linked element * will be moved with the cursor during a drag * @method setDragElId * @param id {string} the id of the element that will be used to initiate the drag */ setDragElId: function(id) { this.dragElId = id; }, /** * Allows you to specify a child of the linked element that should be * used to initiate the drag operation. An example of this would be if * you have a content div with text and links. Clicking anywhere in the * content area would normally start the drag operation. Use this method * to specify that an element inside of the content div is the element * that starts the drag operation. * @method setHandleElId * @param id {string} the id of the element that will be used to * initiate the drag. */ setHandleElId: function(id) { if (typeof id !== "string") { id = 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") { 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; } // firing the mousedown events prior to calculating positions var b4Return = this.b4MouseDown(e), b4Return2 = true; if (this.events.b4MouseDown) { b4Return2 = this.fireEvent('b4MouseDownEvent', e); } var mDownReturn = this.onMouseDown(e), mDownReturn2 = true; if (this.events.mouseDown) { mDownReturn2 = this.fireEvent('mouseDownEvent', e); } if ((b4Return === false) || (mDownReturn === false) || (b4Return2 === false) || (mDownReturn2 === false)) { 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(); // start tracking mousemove distance and mousedown time to // determine when to start the actual drag this.DDM.handleMouseDown(e, this); // this mousedown is mine this.DDM.stopEvent(e); } else { } } }, /** * @method clickValidator * @description Method validates that the clicked element * was indeed the handle or a valid child of the handle * @param {Event} e */ clickValidator: function(e) { var target = YAHOO.util.Event.getTarget(e); return ( this.isValidHandleChild(target) && (this.id == this.handleElId || this.DDM.handleWasClicked(target, this.id)) ); }, /** * 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}; }, /** * 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 = 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") { 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= 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 = parseInt(iLeft, 10); this.rightConstraint = parseInt(iRight, 10); this.minX = this.initPageX - this.leftConstraint; this.maxX = this.initPageX + this.rightConstraint; 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 = parseInt(iUp, 10); this.bottomConstraint = parseInt(iDown, 10); this.minY = this.initPageY - this.topConstraint; this.maxY = this.initPageY + this.bottomConstraint; if (iTickSize) { this.setYTicks(this.initPageY, iTickSize); } this.constrainY = true; }, /** * resetConstraints must be called if you manually reposition a dd element. * @method resetConstraints */ 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= 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); } }; YAHOO.augment(YAHOO.util.DragDrop, YAHOO.util.EventProvider); /** * @event mouseDownEvent * @description Provides access to the mousedown event. The mousedown does not always result in a drag operation. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4MouseDownEvent * @description Provides access to the mousedown event, before the mouseDownEvent gets fired. Returning false will cancel the drag. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event mouseUpEvent * @description Fired from inside DragDropMgr when the drag operation is finished. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4StartDragEvent * @description Fires before the startDragEvent, returning false will cancel the startDrag Event. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event startDragEvent * @description Occurs after a mouse down and the drag threshold has been met. The drag threshold default is either 3 pixels of mouse movement or 1 full second of holding the mousedown. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4EndDragEvent * @description Fires before the endDragEvent. Returning false will cancel. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event endDragEvent * @description Fires on the mouseup event after a drag has been initiated (startDrag fired). * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragEvent * @description Occurs every mousemove event while dragging. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4DragEvent * @description Fires before the dragEvent. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event invalidDropEvent * @description Fires when the dragged objects is dropped in a location that contains no drop targets. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4DragOutEvent * @description Fires before the dragOutEvent * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragOutEvent * @description Fires when a dragged object is no longer over an object that had the onDragEnter fire. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragEnterEvent * @description Occurs when the dragged object first interacts with another targettable drag and drop object. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4DragOverEvent * @description Fires before the dragOverEvent. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragOverEvent * @description Fires every mousemove event while over a drag and drop object. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4DragDropEvent * @description Fires before the dragDropEvent * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragDropEvent * @description Fires when the dragged objects is dropped on another. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ })(); /** * 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 when a drag and drop element is dragged near the viewport boundary. * Defaults to true. * @property scroll * @type boolean */ scroll: true, /** * Sets the pointer offset to the distance between the linked element's top * left corner and the location the element was clicked * @method autoOffset * @param {int} iPageX the X coordinate of the click * @param {int} iPageY the Y coordinate of the click */ autoOffset: function(iPageX, iPageY) { var x = iPageX - this.startPageX; var y = iPageY - this.startPageY; this.setDelta(x, y); }, /** * Sets the pointer offset. You can call this directly to force the * offset to be in a particular location (e.g., pass in 0,0 to set it * to the center of the object, 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); var self = this; setTimeout(function() { self.autoScroll.call(self, oCoord.x, oCoord.y, el.offsetHeight, el.offsetWidth); }, 0); }, /** * 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); } } }, /* * 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.setStartPosition(); // 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) { } */ /** * @event mouseDownEvent * @description Provides access to the mousedown event. The mousedown does not always result in a drag operation. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4MouseDownEvent * @description Provides access to the mousedown event, before the mouseDownEvent gets fired. Returning false will cancel the drag. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event mouseUpEvent * @description Fired from inside DragDropMgr when the drag operation is finished. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4StartDragEvent * @description Fires before the startDragEvent, returning false will cancel the startDrag Event. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event startDragEvent * @description Occurs after a mouse down and the drag threshold has been met. The drag threshold default is either 3 pixels of mouse movement or 1 full second of holding the mousedown. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4EndDragEvent * @description Fires before the endDragEvent. Returning false will cancel. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event endDragEvent * @description Fires on the mouseup event after a drag has been initiated (startDrag fired). * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragEvent * @description Occurs every mousemove event while dragging. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4DragEvent * @description Fires before the dragEvent. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event invalidDropEvent * @description Fires when the dragged objects is dropped in a location that contains no drop targets. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4DragOutEvent * @description Fires before the dragOutEvent * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragOutEvent * @description Fires when a dragged object is no longer over an object that had the onDragEnter fire. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragEnterEvent * @description Occurs when the dragged object first interacts with another targettable drag and drop object. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4DragOverEvent * @description Fires before the dragOverEvent. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragOverEvent * @description Fires every mousemove event while over a drag and drop object. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4DragDropEvent * @description Fires before the dragDropEvent * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragDropEvent * @description Fires when the dragged objects is dropped on another. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ }); /** * 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, body=document.body; if (!body || !body.firstChild) { setTimeout( function() { self.createFrame(); }, 50 ); return; } var div=this.getDragEl(), Dom=YAHOO.util.Dom; 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; s.height = "25px"; s.width = "25px"; var _data = document.createElement('div'); Dom.setStyle(_data, 'height', '100%'); Dom.setStyle(_data, 'width', '100%'); /** * If the proxy element has no background-color, then it is considered to the "transparent" by Internet Explorer. * Since it is "transparent" then the events pass through it to the iframe below. * So creating a "fake" div inside the proxy element and giving it a background-color, then setting it to an * opacity of 0, it appears to not be there, however IE still thinks that it is so the events never pass through. */ Dom.setStyle(_data, 'background-color', '#ccc'); Dom.setStyle(_data, 'opacity', '0'); div.appendChild(_data); /** * It seems that IE will fire the mouseup event if you pass a proxy element over a select box * Placing the IFRAME element inside seems to stop this issue */ if (YAHOO.env.ua.ie) { //Only needed for Internet Explorer var ifr = document.createElement('iframe'); ifr.setAttribute('src', 'javascript: false;'); ifr.setAttribute('scrolling', 'no'); ifr.setAttribute('frameborder', '0'); div.insertBefore(ifr, div.firstChild); Dom.setStyle(ifr, 'height', '100%'); Dom.setStyle(ifr, 'width', '100%'); Dom.setStyle(ifr, 'position', 'absolute'); Dom.setStyle(ifr, 'top', '0'); Dom.setStyle(ifr, 'left', '0'); Dom.setStyle(ifr, 'opacity', '0'); Dom.setStyle(ifr, 'zIndex', '-1'); Dom.setStyle(ifr.nextSibling, 'zIndex', '2'); } // 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) { this.setStartPosition(); var x = YAHOO.util.Event.getPageX(e); var y = YAHOO.util.Event.getPageY(e); this.autoOffset(x, y); // This causes the autoscroll code to kick off, which means autoscroll can // happen prior to the check for a valid drag handle. // 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); } /** * @event mouseDownEvent * @description Provides access to the mousedown event. The mousedown does not always result in a drag operation. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4MouseDownEvent * @description Provides access to the mousedown event, before the mouseDownEvent gets fired. Returning false will cancel the drag. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event mouseUpEvent * @description Fired from inside DragDropMgr when the drag operation is finished. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4StartDragEvent * @description Fires before the startDragEvent, returning false will cancel the startDrag Event. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event startDragEvent * @description Occurs after a mouse down and the drag threshold has been met. The drag threshold default is either 3 pixels of mouse movement or 1 full second of holding the mousedown. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4EndDragEvent * @description Fires before the endDragEvent. Returning false will cancel. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event endDragEvent * @description Fires on the mouseup event after a drag has been initiated (startDrag fired). * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragEvent * @description Occurs every mousemove event while dragging. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4DragEvent * @description Fires before the dragEvent. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event invalidDropEvent * @description Fires when the dragged objects is dropped in a location that contains no drop targets. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4DragOutEvent * @description Fires before the dragOutEvent * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragOutEvent * @description Fires when a dragged object is no longer over an object that had the onDragEnter fire. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragEnterEvent * @description Occurs when the dragged object first interacts with another targettable drag and drop object. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4DragOverEvent * @description Fires before the dragOverEvent. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragOverEvent * @description Fires every mousemove event while over a drag and drop object. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event b4DragDropEvent * @description Fires before the dragDropEvent * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ /** * @event dragDropEvent * @description Fires when the dragged objects is dropped on another. * @type YAHOO.util.CustomEvent See Element.addListener for more information on listening for this event. */ }); /** * 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); } }); YAHOO.register("dragdrop", YAHOO.util.DragDropMgr, {version: "2.6.0", build: "1321"});