/* * jQuery UI Draggable 1.6 * * Copyright (c) 2008 AUTHORS.txt (http://ui.jquery.com/about) * Dual licensed under the MIT (MIT-LICENSE.txt) * and GPL (GPL-LICENSE.txt) licenses. * * http://docs.jquery.com/UI/Draggables * * Depends: * ui.core.js */ (function($) { $.widget("ui.draggable", $.extend({}, $.ui.mouse, { _init: function() { if (this.options.helper == 'original' && !(/^(?:r|a|f)/).test(this.element.css("position"))) this.element[0].style.position = 'relative'; (this.options.cssNamespace && this.element.addClass(this.options.cssNamespace+"-draggable")); (this.options.disabled && this.element.addClass('ui-draggable-disabled')); this._mouseInit(); }, destroy: function() { if(!this.element.data('draggable')) return; this.element.removeData("draggable").unbind(".draggable").removeClass('ui-draggable ui-draggable-dragging ui-draggable-disabled'); this._mouseDestroy(); }, _mouseCapture: function(event) { var o = this.options; if (this.helper || o.disabled || $(event.target).is('.ui-resizable-handle')) return false; //Quit if we're not on a valid handle this.handle = this._getHandle(event); if (!this.handle) return false; return true; }, _mouseStart: function(event) { var o = this.options; //Create and append the visible helper this.helper = this._createHelper(event); //Cache the helper size this._cacheHelperProportions(); //If ddmanager is used for droppables, set the global draggable if($.ui.ddmanager) $.ui.ddmanager.current = this; /* * - Position generation - * This block generates everything position related - it's the core of draggables. */ //Cache the margins of the original element this._cacheMargins(); //Store the helper's css position this.cssPosition = this.helper.css("position"); this.scrollParent = this.helper.scrollParent(); //The element's absolute position on the page minus margins this.offset = this.element.offset(); this.offset = { top: this.offset.top - this.margins.top, left: this.offset.left - this.margins.left }; $.extend(this.offset, { click: { //Where the click happened, relative to the element left: event.pageX - this.offset.left, top: event.pageY - this.offset.top }, parent: this._getParentOffset(), relative: this._getRelativeOffset() //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helper }); //Adjust the mouse offset relative to the helper if 'cursorAt' is supplied if(o.cursorAt) this._adjustOffsetFromHelper(o.cursorAt); //Generate the original position this.originalPosition = this._generatePosition(event); //Set a containment if given in the options if(o.containment) this._setContainment(); //Call plugins and callbacks this._propagate("start", event); //Recache the helper size this._cacheHelperProportions(); //Prepare the droppable offsets if ($.ui.ddmanager && !o.dropBehaviour) $.ui.ddmanager.prepareOffsets(this, event); this.helper.addClass("ui-draggable-dragging"); this._mouseDrag(event, true); //Execute the drag once - this causes the helper not to be visible before getting its correct position return true; }, _mouseDrag: function(event, noPropagation) { //Compute the helpers position this.position = this._generatePosition(event); this.positionAbs = this._convertPositionTo("absolute"); //Call plugins and callbacks and use the resulting position if something is returned if(!noPropagation) this.position = this._propagate("drag", event) || this.position; if(!this.options.axis || this.options.axis != "y") this.helper[0].style.left = this.position.left+'px'; if(!this.options.axis || this.options.axis != "x") this.helper[0].style.top = this.position.top+'px'; if($.ui.ddmanager) $.ui.ddmanager.drag(this, event); return false; }, _mouseStop: function(event) { //If we are using droppables, inform the manager about the drop var dropped = false; if ($.ui.ddmanager && !this.options.dropBehaviour) var dropped = $.ui.ddmanager.drop(this, event); if((this.options.revert == "invalid" && !dropped) || (this.options.revert == "valid" && dropped) || this.options.revert === true || ($.isFunction(this.options.revert) && this.options.revert.call(this.element, dropped))) { var self = this; $(this.helper).animate(this.originalPosition, parseInt(this.options.revertDuration, 10), function() { self._propagate("stop", event); self._clear(); }); } else { this._propagate("stop", event); this._clear(); } return false; }, _getHandle: function(event) { var handle = !this.options.handle || !$(this.options.handle, this.element).length ? true : false; $(this.options.handle, this.element) .find("*") .andSelf() .each(function() { if(this == event.target) handle = true; }); return handle; }, _createHelper: function(event) { var o = this.options; var helper = $.isFunction(o.helper) ? $(o.helper.apply(this.element[0], [event])) : (o.helper == 'clone' ? this.element.clone() : this.element); if(!helper.parents('body').length) helper.appendTo((o.appendTo == 'parent' ? this.element[0].parentNode : o.appendTo)); if(helper[0] != this.element[0] && !(/(fixed|absolute)/).test(helper.css("position"))) helper.css("position", "absolute"); return helper; }, _adjustOffsetFromHelper: function(obj) { if(obj.left != undefined) this.offset.click.left = obj.left + this.margins.left; if(obj.right != undefined) this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left; if(obj.top != undefined) this.offset.click.top = obj.top + this.margins.top; if(obj.bottom != undefined) this.offset.click.top = this.helperProportions.height - obj.bottom + this.margins.top; }, _getParentOffset: function() { this.offsetParent = this.helper.offsetParent(); var po = this.offsetParent.offset(); //Get the offsetParent and cache its position if((this.offsetParent[0] == document.body && $.browser.mozilla) //Ugly FF3 fix || (this.offsetParent[0].tagName && this.offsetParent[0].tagName.toLowerCase() == 'html' && $.browser.msie)) //Ugly IE fix po = { top: 0, left: 0 }; return { top: po.top + (parseInt(this.offsetParent.css("borderTopWidth"),10) || 0), left: po.left + (parseInt(this.offsetParent.css("borderLeftWidth"),10) || 0) }; }, _getRelativeOffset: function() { if(this.cssPosition == "relative") { var p = this.element.position(); return { top: p.top - (parseInt(this.helper.css("top"),10) || 0) + this.scrollParent.scrollTop(), left: p.left - (parseInt(this.helper.css("left"),10) || 0) + this.scrollParent.scrollLeft() }; } else { return { top: 0, left: 0 }; } }, _cacheMargins: function() { this.margins = { left: (parseInt(this.element.css("marginLeft"),10) || 0), top: (parseInt(this.element.css("marginTop"),10) || 0) }; }, _cacheHelperProportions: function() { this.helperProportions = { width: this.helper.outerWidth(), height: this.helper.outerHeight() }; }, _setContainment: function() { var o = this.options; if(o.containment == 'parent') o.containment = this.helper[0].parentNode; if(o.containment == 'document' || o.containment == 'window') this.containment = [ 0 - this.offset.relative.left - this.offset.parent.left, 0 - this.offset.relative.top - this.offset.parent.top, $(o.containment == 'document' ? document : window).width() - this.offset.relative.left - this.offset.parent.left - this.helperProportions.width - this.margins.left - (parseInt(this.element.css("marginRight"),10) || 0), ($(o.containment == 'document' ? document : window).height() || document.body.parentNode.scrollHeight) - this.offset.relative.top - this.offset.parent.top - this.helperProportions.height - this.margins.top - (parseInt(this.element.css("marginBottom"),10) || 0) ]; if(!(/^(document|window|parent)$/).test(o.containment)) { var ce = $(o.containment)[0]; var co = $(o.containment).offset(); var over = ($(ce).css("overflow") != 'hidden'); this.containment = [ co.left + (parseInt($(ce).css("borderLeftWidth"),10) || 0) - this.offset.relative.left - this.offset.parent.left - this.margins.left, co.top + (parseInt($(ce).css("borderTopWidth"),10) || 0) - this.offset.relative.top - this.offset.parent.top - this.margins.top, co.left+(over ? Math.max(ce.scrollWidth,ce.offsetWidth) : ce.offsetWidth) - (parseInt($(ce).css("borderLeftWidth"),10) || 0) - this.offset.relative.left - this.offset.parent.left - this.helperProportions.width - this.margins.left, co.top+(over ? Math.max(ce.scrollHeight,ce.offsetHeight) : ce.offsetHeight) - (parseInt($(ce).css("borderTopWidth"),10) || 0) - this.offset.relative.top - this.offset.parent.top - this.helperProportions.height - this.margins.top ]; } }, _convertPositionTo: function(d, pos) { if(!pos) pos = this.position; var mod = d == "absolute" ? 1 : -1; var scroll = this[(this.cssPosition == 'absolute' ? 'offset' : 'scroll')+'Parent'], scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName); return { top: ( pos.top // the calculated relative position + this.offset.relative.top * mod // Only for relative positioned nodes: Relative offset from element to offset parent + this.offset.parent.top * mod // The offsetParent's offset without borders (offset + border) + ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) * mod + this.margins.top * mod //Add the margin (you don't want the margin counting in intersection methods) ), left: ( pos.left // the calculated relative position + this.offset.relative.left * mod // Only for relative positioned nodes: Relative offset from element to offset parent + this.offset.parent.left * mod // The offsetParent's offset without borders (offset + border) + ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : ( scrollIsRootNode ? 0 : scroll.scrollLeft() ) ) * mod + this.margins.left * mod //Add the margin (you don't want the margin counting in intersection methods) ) }; }, _generatePosition: function(event) { var o = this.options, scroll = this[(this.cssPosition == 'absolute' ? 'offset' : 'scroll')+'Parent'], scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName); var position = { top: ( event.pageY // The absolute mouse position - this.offset.click.top // Click offset (relative to the element) - this.offset.relative.top // Only for relative positioned nodes: Relative offset from element to offset parent - this.offset.parent.top // The offsetParent's offset without borders (offset + border) + ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) ), left: ( event.pageX // The absolute mouse position - this.offset.click.left // Click offset (relative to the element) - this.offset.relative.left // Only for relative positioned nodes: Relative offset from element to offset parent - this.offset.parent.left // The offsetParent's offset without borders (offset + border) + ( this.cssPosition == 'fixed' ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() ) ) }; if(!this.originalPosition) return position; //If we are not dragging yet, we won't check for options /* * - Position constraining - * Constrain the position to a mix of grid, containment. */ if(this.containment) { if(position.left < this.containment[0]) position.left = this.containment[0]; if(position.top < this.containment[1]) position.top = this.containment[1]; if(position.left > this.containment[2]) position.left = this.containment[2]; if(position.top > this.containment[3]) position.top = this.containment[3]; } if(o.grid) { var top = this.originalPosition.top + Math.round((position.top - this.originalPosition.top) / o.grid[1]) * o.grid[1]; position.top = this.containment ? (!(top < this.containment[1] || top > this.containment[3]) ? top : (!(top < this.containment[1]) ? top - o.grid[1] : top + o.grid[1])) : top; var left = this.originalPosition.left + Math.round((position.left - this.originalPosition.left) / o.grid[0]) * o.grid[0]; position.left = this.containment ? (!(left < this.containment[0] || left > this.containment[2]) ? left : (!(left < this.containment[0]) ? left - o.grid[0] : left + o.grid[0])) : left; } return position; }, _clear: function() { this.helper.removeClass("ui-draggable-dragging"); if(this.helper[0] != this.element[0] && !this.cancelHelperRemoval) this.helper.remove(); //if($.ui.ddmanager) $.ui.ddmanager.current = null; this.helper = null; this.cancelHelperRemoval = false; }, // From now on bulk stuff - mainly helpers _propagate: function(n, event) { $.ui.plugin.call(this, n, [event, this._uiHash()]); if(n == "drag") this.positionAbs = this._convertPositionTo("absolute"); //The absolute position has to be recalculated after plugins return this.element.triggerHandler(n == "drag" ? n : "drag"+n, [event, this._uiHash()], this.options[n]); }, plugins: {}, _uiHash: function(event) { return { helper: this.helper, position: this.position, absolutePosition: this.positionAbs, options: this.options }; } })); $.extend($.ui.draggable, { version: "1.6", defaults: { appendTo: "parent", axis: false, cancel: ":input", connectToSortable: false, containment: false, cssNamespace: "ui", cursor: "default", cursorAt: null, delay: 0, distance: 1, grid: false, handle: false, helper: "original", iframeFix: false, opacity: 1, refreshPositions: false, revert: false, revertDuration: 500, scope: "default", scroll: true, scrollSensitivity: 20, scrollSpeed: 20, snap: false, snapMode: "both", snapTolerance: 20, stack: false, zIndex: null } }); $.ui.plugin.add("draggable", "connectToSortable", { start: function(event, ui) { var inst = $(this).data("draggable"); inst.sortables = []; $(ui.options.connectToSortable).each(function() { // 'this' points to a string, and should therefore resolved as query, but instead, if the string is assigned to a variable, it loops through the strings properties, // so we have to append '' to make it anonymous again $(this+'').each(function() { if($.data(this, 'sortable')) { var sortable = $.data(this, 'sortable'); inst.sortables.push({ instance: sortable, shouldRevert: sortable.options.revert }); sortable._refreshItems(); //Do a one-time refresh at start to refresh the containerCache sortable._propagate("activate", event, inst); } }); }); }, stop: function(event, ui) { //If we are still over the sortable, we fake the stop event of the sortable, but also remove helper var inst = $(this).data("draggable"); $.each(inst.sortables, function() { if(this.instance.isOver) { this.instance.isOver = 0; inst.cancelHelperRemoval = true; //Don't remove the helper in the draggable instance this.instance.cancelHelperRemoval = false; //Remove it in the sortable instance (so sortable plugins like revert still work) if(this.shouldRevert) this.instance.options.revert = true; //revert here this.instance._mouseStop(event); //Also propagate receive event, since the sortable is actually receiving a element this.instance.element.triggerHandler("sortreceive", [event, $.extend(this.instance._ui(), { sender: inst.element })], this.instance.options["receive"]); this.instance.options.helper = this.instance.options._helper; if(inst.options.helper == 'original') { this.instance.currentItem.css({ top: 'auto', left: 'auto' }); } } else { this.instance.cancelHelperRemoval = false; //Remove the helper in the sortable instance this.instance._propagate("deactivate", event, inst); } }); }, drag: function(event, ui) { var inst = $(this).data("draggable"), self = this; var checkPos = function(o) { var dyClick = this.offset.click.top, dxClick = this.offset.click.left; var helperTop = this.positionAbs.top, helperLeft = this.positionAbs.left; var itemHeight = o.height, itemWidth = o.width; var itemTop = o.top, itemLeft = o.left; return $.ui.isOver(helperTop + dyClick, helperLeft + dxClick, itemTop, itemLeft, itemHeight, itemWidth); }; $.each(inst.sortables, function(i) { if(checkPos.call(inst, this.instance.containerCache)) { //If it intersects, we use a little isOver variable and set it once, so our move-in stuff gets fired only once if(!this.instance.isOver) { this.instance.isOver = 1; //Now we fake the start of dragging for the sortable instance, //by cloning the list group item, appending it to the sortable and using it as inst.currentItem //We can then fire the start event of the sortable with our passed browser event, and our own helper (so it doesn't create a new one) this.instance.currentItem = $(self).clone().appendTo(this.instance.element).data("sortable-item", true); this.instance.options._helper = this.instance.options.helper; //Store helper option to later restore it this.instance.options.helper = function() { return ui.helper[0]; }; event.target = this.instance.currentItem[0]; this.instance._mouseCapture(event, true); this.instance._mouseStart(event, true, true); //Because the browser event is way off the new appended portlet, we modify a couple of variables to reflect the changes this.instance.offset.click.top = inst.offset.click.top; this.instance.offset.click.left = inst.offset.click.left; this.instance.offset.parent.left -= inst.offset.parent.left - this.instance.offset.parent.left; this.instance.offset.parent.top -= inst.offset.parent.top - this.instance.offset.parent.top; inst._propagate("toSortable", event); } //Provided we did all the previous steps, we can fire the drag event of the sortable on every draggable drag, when it intersects with the sortable if(this.instance.currentItem) this.instance._mouseDrag(event); } else { //If it doesn't intersect with the sortable, and it intersected before, //we fake the drag stop of the sortable, but make sure it doesn't remove the helper by using cancelHelperRemoval if(this.instance.isOver) { this.instance.isOver = 0; this.instance.cancelHelperRemoval = true; this.instance.options.revert = false; //No revert here this.instance._mouseStop(event, true); this.instance.options.helper = this.instance.options._helper; //Now we remove our currentItem, the list group clone again, and the placeholder, and animate the helper back to it's original size this.instance.currentItem.remove(); if(this.instance.placeholder) this.instance.placeholder.remove(); inst._propagate("fromSortable", event); } }; }); } }); $.ui.plugin.add("draggable", "cursor", { start: function(event, ui) { var t = $('body'); if (t.css("cursor")) ui.options._cursor = t.css("cursor"); t.css("cursor", ui.options.cursor); }, stop: function(event, ui) { if (ui.options._cursor) $('body').css("cursor", ui.options._cursor); } }); $.ui.plugin.add("draggable", "iframeFix", { start: function(event, ui) { $(ui.options.iframeFix === true ? "iframe" : ui.options.iframeFix).each(function() { $('
') .css({ width: this.offsetWidth+"px", height: this.offsetHeight+"px", position: "absolute", opacity: "0.001", zIndex: 1000 }) .css($(this).offset()) .appendTo("body"); }); }, stop: function(event, ui) { $("div.ui-draggable-iframeFix").each(function() { this.parentNode.removeChild(this); }); //Remove frame helpers } }); $.ui.plugin.add("draggable", "opacity", { start: function(event, ui) { var t = $(ui.helper); if(t.css("opacity")) ui.options._opacity = t.css("opacity"); t.css('opacity', ui.options.opacity); }, stop: function(event, ui) { if(ui.options._opacity) $(ui.helper).css('opacity', ui.options._opacity); } }); $.ui.plugin.add("draggable", "scroll", { start: function(event, ui) { var o = ui.options; var i = $(this).data("draggable"); if(i.scrollParent[0] != document && i.scrollParent[0].tagName != 'HTML') i.overflowOffset = i.scrollParent.offset(); }, drag: function(event, ui) { var o = ui.options, scrolled = false; var i = $(this).data("draggable"); if(i.scrollParent[0] != document && i.scrollParent[0].tagName != 'HTML') { if((i.overflowOffset.top + i.scrollParent[0].offsetHeight) - event.pageY < o.scrollSensitivity) i.scrollParent[0].scrollTop = scrolled = i.scrollParent[0].scrollTop + o.scrollSpeed; else if(event.pageY - i.overflowOffset.top < o.scrollSensitivity) i.scrollParent[0].scrollTop = scrolled = i.scrollParent[0].scrollTop - o.scrollSpeed; if((i.overflowOffset.left + i.scrollParent[0].offsetWidth) - event.pageX < o.scrollSensitivity) i.scrollParent[0].scrollLeft = scrolled = i.scrollParent[0].scrollLeft + o.scrollSpeed; else if(event.pageX - i.overflowOffset.left < o.scrollSensitivity) i.scrollParent[0].scrollLeft = scrolled = i.scrollParent[0].scrollLeft - o.scrollSpeed; } else { if(event.pageY - $(document).scrollTop() < o.scrollSensitivity) scrolled = $(document).scrollTop($(document).scrollTop() - o.scrollSpeed); else if($(window).height() - (event.pageY - $(document).scrollTop()) < o.scrollSensitivity) scrolled = $(document).scrollTop($(document).scrollTop() + o.scrollSpeed); if(event.pageX - $(document).scrollLeft() < o.scrollSensitivity) scrolled = $(document).scrollLeft($(document).scrollLeft() - o.scrollSpeed); else if($(window).width() - (event.pageX - $(document).scrollLeft()) < o.scrollSensitivity) scrolled = $(document).scrollLeft($(document).scrollLeft() + o.scrollSpeed); } if(scrolled !== false && $.ui.ddmanager && !o.dropBehaviour) $.ui.ddmanager.prepareOffsets(i, event); // This is a special case where we need to modify a offset calculated on start, since the following happened: // 1. The position of the helper is absolute, so it's position is calculated based on the next positioned parent // 2. The actual offset parent is a child of the scroll parent, and the scroll parent isn't the document, which means that // the scroll is included in the initial calculation of the offset of the parent, and never recalculated upon drag if(scrolled !== false && i.cssPosition == 'absolute' && i.scrollParent[0] != document && $.ui.contains(i.scrollParent[0], i.offsetParent[0])) { i.offset.parent = i._getParentOffset(); } // This is another very weird special case that only happens for relative elements: // 1. If the css position is relative // 2. and the scroll parent is the document or similar to the offset parent // we have to refresh the relative offset during the scroll so there are no jumps if(scrolled !== false && i.cssPosition == 'relative' && !(i.scrollParent[0] != document && i.scrollParent[0] != i.offsetParent[0])) { i.offset.relative = i._getRelativeOffset(); } } }); $.ui.plugin.add("draggable", "snap", { start: function(event, ui) { var inst = $(this).data("draggable"); inst.snapElements = []; $(ui.options.snap.constructor != String ? ( ui.options.snap.items || ':data(draggable)' ) : ui.options.snap).each(function() { var $t = $(this); var $o = $t.offset(); if(this != inst.element[0]) inst.snapElements.push({ item: this, width: $t.outerWidth(), height: $t.outerHeight(), top: $o.top, left: $o.left }); }); }, drag: function(event, ui) { var inst = $(this).data("draggable"); var d = ui.options.snapTolerance; var x1 = ui.absolutePosition.left, x2 = x1 + inst.helperProportions.width, y1 = ui.absolutePosition.top, y2 = y1 + inst.helperProportions.height; for (var i = inst.snapElements.length - 1; i >= 0; i--){ var l = inst.snapElements[i].left, r = l + inst.snapElements[i].width, t = inst.snapElements[i].top, b = t + inst.snapElements[i].height; //Yes, I know, this is insane ;) if(!((l-d < x1 && x1 < r+d && t-d < y1 && y1 < b+d) || (l-d < x1 && x1 < r+d && t-d < y2 && y2 < b+d) || (l-d < x2 && x2 < r+d && t-d < y1 && y1 < b+d) || (l-d < x2 && x2 < r+d && t-d < y2 && y2 < b+d))) { if(inst.snapElements[i].snapping) (inst.options.snap.release && inst.options.snap.release.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: inst.snapElements[i].item }))); inst.snapElements[i].snapping = false; continue; } if(ui.options.snapMode != 'inner') { var ts = Math.abs(t - y2) <= d; var bs = Math.abs(b - y1) <= d; var ls = Math.abs(l - x2) <= d; var rs = Math.abs(r - x1) <= d; if(ts) ui.position.top = inst._convertPositionTo("relative", { top: t - inst.helperProportions.height, left: 0 }).top; if(bs) ui.position.top = inst._convertPositionTo("relative", { top: b, left: 0 }).top; if(ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l - inst.helperProportions.width }).left; if(rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r }).left; } var first = (ts || bs || ls || rs); if(ui.options.snapMode != 'outer') { var ts = Math.abs(t - y1) <= d; var bs = Math.abs(b - y2) <= d; var ls = Math.abs(l - x1) <= d; var rs = Math.abs(r - x2) <= d; if(ts) ui.position.top = inst._convertPositionTo("relative", { top: t, left: 0 }).top; if(bs) ui.position.top = inst._convertPositionTo("relative", { top: b - inst.helperProportions.height, left: 0 }).top; if(ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l }).left; if(rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r - inst.helperProportions.width }).left; } if(!inst.snapElements[i].snapping && (ts || bs || ls || rs || first)) (inst.options.snap.snap && inst.options.snap.snap.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: inst.snapElements[i].item }))); inst.snapElements[i].snapping = (ts || bs || ls || rs || first); }; } }); $.ui.plugin.add("draggable", "stack", { start: function(event, ui) { var group = $.makeArray($(ui.options.stack.group)).sort(function(a,b) { return (parseInt($(a).css("zIndex"),10) || ui.options.stack.min) - (parseInt($(b).css("zIndex"),10) || ui.options.stack.min); }); $(group).each(function(i) { this.style.zIndex = ui.options.stack.min + i; }); this[0].style.zIndex = ui.options.stack.min + group.length; } }); $.ui.plugin.add("draggable", "zIndex", { start: function(event, ui) { var t = $(ui.helper); if(t.css("zIndex")) ui.options._zIndex = t.css("zIndex"); t.css('zIndex', ui.options.zIndex); }, stop: function(event, ui) { if(ui.options._zIndex) $(ui.helper).css('zIndex', ui.options._zIndex); } }); })(jQuery);