jquery - jQuery UI 和 nestedSortable 放在空列表上
问题描述
我正在使用 jQuery UI 和 nestedSortable 插件（由 github 上的 ilikenwf 提供），但我很难将项目放入空列表中。如果您查看下面的链接，您必须找到一个最佳位置来添加该项目。这是一个错误还是我做错了什么？
第二个问题我将 maxLevels 选项设置为 2，但正如您在链接中看到的那样，它显示了第 3 级，但不会放弃它。还有其他我不知道的选择吗？或者应该是这样的？
$(document).ready(function(){
$('.sortable').nestedSortable({
handle: '.divHandle',
items: 'li',
toleranceElement: '> div',
forcePlaceholderSize:true,
placeholder:"placeholder"
});
});
/*
* jQuery UI Nested Sortable
* v 2.0 / 29 oct 2012
* http://mjsarfatti.com/sandbox/nestedSortable
*
* Depends on:
* jquery.ui.sortable.js 1.10+
*
* Copyright (c) 2010-2013 Manuele J Sarfatti
* Licensed under the MIT License
* http://www.opensource.org/licenses/mit-license.php
*/
(function($) {
function isOverAxis( x, reference, size ) {
return ( x > reference ) && ( x < ( reference + size ) );
}
$.widget("mjs.nestedSortable", $.extend({}, $.ui.sortable.prototype, {
options: {
doNotClear: false,
expandOnHover: 700,
isAllowed: function(placeholder, placeholderParent, originalItem) { return true; },
isTree: false,
listType: 'ul',
maxLevels: 2,
protectRoot: true,
rootID: null,
rtl: false,
startCollapsed: false,
tabSize: 0,
branchClass: 'mjs-nestedSortable-branch',
collapsedClass: 'mjs-nestedSortable-collapsed',
disableNestingClass: 'mjs-nestedSortable-no-nesting',
errorClass: 'mjs-nestedSortable-error',
expandedClass: 'mjs-nestedSortable-expanded',
hoveringClass: 'mjs-nestedSortable-hovering',
leafClass: 'mjs-nestedSortable-leaf',
disabledClass: 'mjs-nestedSortable-disabled'
},
_create: function() {
this.element.data('ui-sortable', this.element.data('mjs-nestedSortable'));
// mjs - prevent browser from freezing if the HTML is not correct
if (!this.element.is(this.options.listType))
throw new Error('nestedSortable: Please check that the listType option is set to your actual list type');
// mjs - force 'intersect' tolerance method if we have a tree with expanding/collapsing functionality
if (this.options.isTree && this.options.expandOnHover) {
this.options.tolerance = 'intersect';
}
$.ui.sortable.prototype._create.apply(this, arguments);
// mjs - prepare the tree by applying the right classes (the CSS is responsible for actual hide/show functionality)
if (this.options.isTree) {
var self = this;
$(this.items).each(function() {
var $li = this.item;
if ($li.children(self.options.listType).length) {
$li.addClass(self.options.branchClass);
// expand/collapse class only if they have children
if ( ! $li.hasClass( self.options.collapsedClass ) && ( ! $li.hasClass( self.options.expandedClass ) ) ) {
if (self.options.startCollapsed) $li.addClass(self.options.collapsedClass);
else $li.addClass(self.options.expandedClass);
}
} else {
$li.addClass(self.options.leafClass);
}
});
}
},
_destroy: function() {
this.element
.removeData("mjs-nestedSortable")
.removeData("ui-sortable");
return $.ui.sortable.prototype._destroy.apply(this, arguments);
},
_mouseDrag: function(event) {
var i, item, itemElement, intersection,
o = this.options,
scrolled = false;
//Compute the helpers position
this.position = this._generatePosition(event);
this.positionAbs = this._convertPositionTo("absolute");
if (!this.lastPositionAbs) {
this.lastPositionAbs = this.positionAbs;
}
//Do scrolling
if(this.options.scroll) {
if(this.scrollParent[0] != document && this.scrollParent[0].tagName != 'HTML') {
if((this.overflowOffset.top + this.scrollParent[0].offsetHeight) - event.pageY < o.scrollSensitivity) {
this.scrollParent[0].scrollTop = scrolled = this.scrollParent[0].scrollTop + o.scrollSpeed;
} else if(event.pageY - this.overflowOffset.top < o.scrollSensitivity) {
this.scrollParent[0].scrollTop = scrolled = this.scrollParent[0].scrollTop - o.scrollSpeed;
}
if((this.overflowOffset.left + this.scrollParent[0].offsetWidth) - event.pageX < o.scrollSensitivity) {
this.scrollParent[0].scrollLeft = scrolled = this.scrollParent[0].scrollLeft + o.scrollSpeed;
} else if(event.pageX - this.overflowOffset.left < o.scrollSensitivity) {
this.scrollParent[0].scrollLeft = scrolled = this.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(this, event);
}
//Regenerate the absolute position used for position checks
this.positionAbs = this._convertPositionTo("absolute");
// mjs - find the top offset before rearrangement,
var previousTopOffset = this.placeholder.offset().top;
//Set the helper 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";
}
// mjs - check and reset hovering state at each cycle
this.hovering = this.hovering ? this.hovering : null;
this.mouseentered = this.mouseentered ? this.mouseentered : false;
// mjs - let's start caching some variables
var parentItem = (this.placeholder[0].parentNode.parentNode &&
$(this.placeholder[0].parentNode.parentNode).closest('.ui-sortable').length)
? $(this.placeholder[0].parentNode.parentNode)
: null,
level = this._getLevel(this.placeholder),
childLevels = this._getChildLevels(this.helper);
var newList = document.createElement(o.listType);
//Rearrange
for (i = this.items.length - 1; i >= 0; i--) {
//Cache variables and intersection, continue if no intersection
item = this.items[i];
itemElement = item.item[0];
intersection = this._intersectsWithPointer(item);
if (!intersection) {
continue;
}
// Only put the placeholder inside the current Container, skip all
// items form other containers. This works because when moving
// an item from one container to another the
// currentContainer is switched before the placeholder is moved.
//
// Without this moving items in "sub-sortables" can cause the placeholder to jitter
// beetween the outer and inner container.
if (item.instance !== this.currentContainer) {
continue;
}
// No action if intersected item is disabled
// and the element above or below in the direction we're going is also disabled
if (itemElement.className.indexOf(o.disabledClass) !== -1) {
// Note: intersection hardcoded direction values from jquery.ui.sortable.js:_intersectsWithPointer
if (intersection === 2) {
// Going down
var itemAfter = this.items[i + 1];
if (itemAfter && itemAfter.item[0].className.indexOf(o.disabledClass) !== -1){
continue;
}
}
else if (intersection === 1) {
// Going up
var itemBefore = this.items[i - 1];
if (itemBefore && itemBefore.item[0].className.indexOf(o.disabledClass) !== -1){
continue;
}
}
}
// cannot intersect with itself
// no useless actions that have been done before
// no action if the item moved is the parent of the item checked
if (itemElement !== this.currentItem[0] &&
this.placeholder[intersection === 1 ? "next" : "prev"]()[0] !== itemElement &&
!$.contains(this.placeholder[0], itemElement) &&
(this.options.type === "semi-dynamic" ? !$.contains(this.element[0], itemElement) : true)
) {
// mjs - we are intersecting an element: trigger the mouseenter event and store this state
if (!this.mouseentered) {
$(itemElement).mouseenter();
this.mouseentered = true;
}
// mjs - if the element has children and they are hidden, show them after a delay (CSS responsible)
if (o.isTree && $(itemElement).hasClass(o.collapsedClass) && o.expandOnHover) {
if (!this.hovering) {
$(itemElement).addClass(o.hoveringClass);
var self = this;
this.hovering = window.setTimeout(function() {
$(itemElement).removeClass(o.collapsedClass).addClass(o.expandedClass);
self.refreshPositions();
self._trigger("expand", event, self._uiHash());
}, o.expandOnHover);
}
}
this.direction = intersection == 1 ? "down" : "up";
// mjs - rearrange the elements and reset timeouts and hovering state
if (this.options.tolerance == "pointer" || this._intersectsWithSides(item)) {
$(itemElement).mouseleave();
this.mouseentered = false;
$(itemElement).removeClass(o.hoveringClass);
this.hovering && window.clearTimeout(this.hovering);
this.hovering = null;
// mjs - do not switch container if it's a root item and 'protectRoot' is true
// or if it's not a root item but we are trying to make it root
if (o.protectRoot
&& ! (this.currentItem[0].parentNode == this.element[0] // it's a root item
&& itemElement.parentNode != this.element[0]) // it's intersecting a non-root item
) {
if (this.currentItem[0].parentNode != this.element[0]
&& itemElement.parentNode == this.element[0]
) {
if ( ! $(itemElement).children(o.listType).length) {
itemElement.appendChild(newList);
o.isTree && $(itemElement).removeClass(o.leafClass).addClass(o.branchClass + ' ' + o.expandedClass);
}
var a = this.direction === "down" ? $(itemElement).prev().children(o.listType) : $(itemElement).children(o.listType);
if (a[0] !== undefined) {
this._rearrange(event, null, a);
}
} else {
this._rearrange(event, item);
}
} else if ( ! o.protectRoot) {
this._rearrange(event, item);
}
} else {
break;
}
// Clear emtpy ul's/ol's
this._clearEmpty(itemElement);
this._trigger("change", event, this._uiHash());
break;
}
}
// mjs - to find the previous sibling in the list, keep backtracking until we hit a valid list item.
var previousItem = this.placeholder[0].previousSibling ? $(this.placeholder[0].previousSibling) : null;
if (previousItem != null) {
while (previousItem[0].nodeName.toLowerCase() != 'li' || previousItem[0].className.indexOf(o.disabledClass) !== -1 || previousItem[0] == this.currentItem[0] || previousItem[0] == this.helper[0]) {
if (previousItem[0].previousSibling) {
previousItem = $(previousItem[0].previousSibling);
} else {
previousItem = null;
break;
}
}
}
// mjs - to find the next sibling in the list, keep stepping forward until we hit a valid list item.
var nextItem = this.placeholder[0].nextSibling ? $(this.placeholder[0].nextSibling) : null;
if (nextItem != null) {
while (nextItem[0].nodeName.toLowerCase() != 'li' || nextItem[0].className.indexOf(o.disabledClass) !== -1 || nextItem[0] == this.currentItem[0] || nextItem[0] == this.helper[0]) {
if (nextItem[0].nextSibling) {
nextItem = $(nextItem[0].nextSibling);
} else {
nextItem = null;
break;
}
}
}
this.beyondMaxLevels = 0;
// mjs - if the item is moved to the left, send it one level up but only if it's at the bottom of the list
if (parentItem != null
&& nextItem == null
&& ! (o.protectRoot && parentItem[0].parentNode == this.element[0])
&&
(o.rtl && (this.positionAbs.left + this.helper.outerWidth() > parentItem.offset().left + parentItem.outerWidth())
|| ! o.rtl && (this.positionAbs.left < parentItem.offset().left))
) {
parentItem.after(this.placeholder[0]);
if (o.isTree && parentItem.children(o.listItem).children('li:visible:not(.ui-sortable-helper)').length < 1) {
parentItem.removeClass(this.options.branchClass + ' ' + this.options.expandedClass)
.addClass(this.options.leafClass);
}
this._clearEmpty(parentItem[0]);
this._trigger("change", event, this._uiHash());
}
// mjs - if the item is below a sibling and is moved to the right, make it a child of that sibling
else if (previousItem != null
&& ! previousItem.hasClass(o.disableNestingClass)
&&
(previousItem.children(o.listType).length && previousItem.children(o.listType).is(':visible')
|| ! previousItem.children(o.listType).length)
&& ! (o.protectRoot && this.currentItem[0].parentNode == this.element[0])
&&
(o.rtl && (this.positionAbs.left + this.helper.outerWidth() < previousItem.offset().left + previousItem.outerWidth() - o.tabSize)
|| ! o.rtl && (this.positionAbs.left > previousItem.offset().left + o.tabSize))
) {
this._isAllowed(previousItem, level, level+childLevels+1);
if (!previousItem.children(o.listType).length) {
previousItem[0].appendChild(newList);
o.isTree && previousItem.removeClass(o.leafClass).addClass(o.branchClass + ' ' + o.expandedClass);
}
// mjs - if this item is being moved from the top, add it to the top of the list.
if (previousTopOffset && (previousTopOffset <= previousItem.offset().top)) {
previousItem.children(o.listType).prepend(this.placeholder);
}
// mjs - otherwise, add it to the bottom of the list.
else {
previousItem.children(o.listType)[0].appendChild(this.placeholder[0]);
}
this._trigger("change", event, this._uiHash());
}
else {
this._isAllowed(parentItem, level, level+childLevels);
}
//Post events to containers
this._contactContainers(event);
//Interconnect with droppables
if($.ui.ddmanager) {
$.ui.ddmanager.drag(this, event);
}
//Call callbacks
this._trigger('sort', event, this._uiHash());
this.lastPositionAbs = this.positionAbs;
return false;
},
_mouseStop: function(event, noPropagation) {
// mjs - if the item is in a position not allowed, send it back
if (this.beyondMaxLevels) {
this.placeholder.removeClass(this.options.errorClass);
if (this.domPosition.prev) {
$(this.domPosition.prev).after(this.placeholder);
} else {
$(this.domPosition.parent).prepend(this.placeholder);
}
this._trigger("revert", event, this._uiHash());
}
// mjs - clear the hovering timeout, just to be sure
$('.'+this.options.hoveringClass).mouseleave().removeClass(this.options.hoveringClass);
this.mouseentered = false;
this.hovering && window.clearTimeout(this.hovering);
this.hovering = null;
$.ui.sortable.prototype._mouseStop.apply(this, arguments);
var pid = $(this.domPosition.parent).parent().attr("id");
var sort = this.domPosition.prev ? $(this.domPosition.prev).next().index() : 0;
if(!(pid == this._uiHash().item.parent().parent().attr("id") &&
sort == this._uiHash().item.index())) {
this._trigger("relocate", event, this._uiHash());
}
},
// mjs - this function is slightly modified to make it easier to hover over a collapsed element and have it expand
_intersectsWithSides: function(item) {
var half = this.options.isTree ? .8 : .5;
var isOverBottomHalf = isOverAxis(this.positionAbs.top + this.offset.click.top, item.top + (item.height*half), item.height),
isOverTopHalf = isOverAxis(this.positionAbs.top + this.offset.click.top, item.top - (item.height*half), item.height),
isOverRightHalf = isOverAxis(this.positionAbs.left + this.offset.click.left, item.left + (item.width/2), item.width),
verticalDirection = this._getDragVerticalDirection(),
horizontalDirection = this._getDragHorizontalDirection();
if (this.floating && horizontalDirection) {
return ((horizontalDirection == "right" && isOverRightHalf) || (horizontalDirection == "left" && !isOverRightHalf));
} else {
return verticalDirection && ((verticalDirection == "down" && isOverBottomHalf) || (verticalDirection == "up" && isOverTopHalf));
}
},
_contactContainers: function(event) {
if (this.options.protectRoot && this.currentItem[0].parentNode == this.element[0] ) {
return;
}
$.ui.sortable.prototype._contactContainers.apply(this, arguments);
},
_clear: function(event, noPropagation) {
$.ui.sortable.prototype._clear.apply(this, arguments);
// mjs - clean last empty ul/ol
for (var i = this.items.length - 1; i >= 0; i--) {
var item = this.items[i].item[0];
this._clearEmpty(item);
}
},
serialize: function(options) {
var o = $.extend({}, this.options, options),
items = this._getItemsAsjQuery(o && o.connected),
str = [];
$(items).each(function() {
var res = ($(o.item || this).attr(o.attribute || 'id') || '')
.match(o.expression || (/(.+)[-=_](.+)/)),
pid = ($(o.item || this).parent(o.listType)
.parent(o.items)
.attr(o.attribute || 'id') || '')
.match(o.expression || (/(.+)[-=_](.+)/));
if (res) {
str.push(((o.key || res[1]) + '[' + (o.key && o.expression ? res[1] : res[2]) + ']')
+ '='
+ (pid ? (o.key && o.expression ? pid[1] : pid[2]) : o.rootID));
}
});
if(!str.length && o.key) {
str.push(o.key + '=');
}
return str.join('&');
},
toHierarchy: function(options) {
var o = $.extend({}, this.options, options),
sDepth = o.startDepthCount || 0,
ret = [];
$(this.element).children(o.items).each(function () {
var level = _recursiveItems(this);
ret.push(level);
});
return ret;
function _recursiveItems(item) {
var id = ($(item).attr(o.attribute || 'id') || '').match(o.expression || (/(.+)[-=_](.+)/));
if (id) {
var currentItem = {"id" : id[2]};
if ($(item).children(o.listType).children(o.items).length > 0) {
currentItem.children = [];
$(item).children(o.listType).children(o.items).each(function() {
var level = _recursiveItems(this);
currentItem.children.push(level);
});
}
return currentItem;
}
}
},
toArray: function(options) {
var o = $.extend({}, this.options, options),
sDepth = o.startDepthCount || 0,
ret = [],
left = 1;
if (!o.excludeRoot) {
ret.push({
"item_id": o.rootID,
"parent_id": null,
"depth": sDepth
});
left++
}
$(this.element).children(o.items).each(function () {
left = _recursiveArray(this, sDepth + 1, left);
});
ret = ret.sort(function(a,b){ return (a.left - b.left); });
return ret;
function _recursiveArray(item, depth, left) {
var right = left + 1,
id,
pid;
if ($(item).children(o.listType).children(o.items).length > 0) {
depth ++;
$(item).children(o.listType).children(o.items).each(function () {
right = _recursiveArray($(this), depth, right);
});
depth --;
}
id = ($(item).attr(o.attribute || 'id')).match(o.expression || (/(.+)[-=_](.+)/));
if (depth === sDepth + 1) {
pid = o.rootID;
} else {
var parentItem = ($(item).parent(o.listType)
.parent(o.items)
.attr(o.attribute || 'id'))
.match(o.expression || (/(.+)[-=_](.+)/));
pid = parentItem[2];
}
if (id) {
ret.push({"item_id": id[2], "parent_id": pid, "depth": depth});
}
left = right + 1;
return left;
}
},
_clearEmpty: function(item) {
var o = this.options;
var emptyList = $(item).children(o.listType);
if (emptyList.length && !emptyList.children().length && !o.doNotClear) {
o.isTree && $(item).removeClass(o.branchClass + ' ' + o.expandedClass).addClass(o.leafClass);
emptyList.remove();
} else if (o.isTree && emptyList.length && emptyList.children().length && emptyList.is(':visible')) {
$(item).removeClass(o.leafClass).addClass(o.branchClass + ' ' + o.expandedClass);
} else if (o.isTree && emptyList.length && emptyList.children().length && !emptyList.is(':visible')) {
$(item).removeClass(o.leafClass).addClass(o.branchClass + ' ' + o.collapsedClass);
}
},
_getLevel: function(item) {
var level = 1;
if (this.options.listType) {
var list = item.closest(this.options.listType);
while (list && list.length > 0 &&
!list.is('.ui-sortable')) {
level++;
list = list.parent().closest(this.options.listType);
}
}
return level;
},
_getChildLevels: function(parent, depth) {
var self = this,
o = this.options,
result = 0;
depth = depth || 0;
$(parent).children(o.listType).children(o.items).each(function (index, child) {
result = Math.max(self._getChildLevels(child, depth + 1), result);
});
return depth ? result + 1 : result;
},
_isAllowed: function(parentItem, level, levels) {
var o = this.options,
maxLevels = this.placeholder.closest('.ui-sortable').nestedSortable('option', 'maxLevels'); // this takes into account the maxLevels set to the recipient list
// mjs - is the root protected?
// mjs - are we nesting too deep?
if ( ! o.isAllowed(this.placeholder, parentItem, this.currentItem)) {
this.placeholder.addClass(o.errorClass);
if (maxLevels < levels && maxLevels != 0) {
this.beyondMaxLevels = levels - maxLevels;
} else {
this.beyondMaxLevels = 1;
}
} else {
if (maxLevels < levels && maxLevels != 0) {
this.placeholder.addClass(o.errorClass);
this.beyondMaxLevels = levels - maxLevels;
} else {
this.placeholder.removeClass(o.errorClass);
this.beyondMaxLevels = 0;
}
}
}
}));
$.mjs.nestedSortable.prototype.options = $.extend({}, $.ui.sortable.prototype.options, $.mjs.nestedSortable.prototype.options);
})(jQuery);*{
margin:0;
padding:0;
}
ul {
list-style:none;
}
.taskListColumn{
float:left;
padding: 0px 0px;
margin: 5px;
color: white;
font-weight: bolder;
max-width: 370px !important;
}
.headerTaskListColumn{
padding: 20px 20px 10px 20px;
}
.taskListElement{
color: black;
margin:10px 20px 0px 20px;
}
.sortable div{
cursor: grab;
}
.taskListElementContent{
padding: 10px 20px;
}
li ul{
padding-bottom:20px;
}
.placeholder {
outline: 1px dashed #4183C4;
float:left;
margin:0px 0px 0px 0px;
}
.taskListContent{
padding: 20px 20px 10px 20px;
}<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
<h3>Sortable inside the oother sorable</h3>
<div class="container-fluid">
<ul class="sortable row flex-nowrap">
<li class="taskListColumn p-2 col-12 col-sm-6 col-lg-4 col-xl-3 bg-dark rounded"><div class="headerTaskListColumn bg-dark divHandle rounded-top ">Basslik 1</div>
</li>
<li class="taskListColumn p-2 col-12 col-sm-6 col-lg-4 col-xl-3 bg-dark rounded"><div class="headerTaskListColumn bg-dark divHandle rounded-top">Baslik2</div>
<ul>
<li class="taskListElement">
<div class="taskListElementContent divHandle rounded bg-light">
Some sub-item content1
</div>
</li>
<li class="taskListElement">
<div class="taskListElementContent divHandle rounded bg-light">
Some sub-item content2
</div>
</li>
<li class="taskListElement">
<div class="taskListElementContent divHandle rounded bg-light">
Some sub-item content3
</div>
</li>
</ul>
</li>
<li class="taskListColumn p-2 col-12 col-sm-6 col-lg-4 col-xl-3 rounded bg-dark"><div class="headerTaskListColumn divHandle">Baslik3</div>
</li>
</ul>
</div>解决方案
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