layui tableSelect.js实现数据表格下拉框(单选或者多选)

<!-- 部分代码 -->
<tr>
    <td><label class="layui-form-label required">巡防点</label></td>
    <td>
        <input type="text" name="point" class="layui-input" lay-verify="required" lay-reqtext="请选择巡防点" autocomplete="off" value="{$row.point|default=''}" id="point" ts-selected="{$row.point_id|default=''}">
        <input type="hidden" name="point_id" value="{$row.point_id|default=''}">
    </td>
    <td><label class="layui-form-label required">巡防人员</label></td>
    <td>
        <input type="text" name="patrol" class="layui-input" lay-verify="required" lay-reqtext="请选择巡防人员" autocomplete="off" value="{$row.patrol|default=''}" id="patrol" ts-selected="{$row.patrol_id|default=''}">
        <input type="hidden" name="patrol_id" value="{$row.patrol_id|default=''}">
    </td>
</tr>

<script src="__STATIC__/jquery.min.js?v={$version}" charset="utf-8"></script>
<script>
layui.config({
    base: '/static/plugs/layui-v2.5.6/ext/',// 第三方模块所在目录
    version: '' // 插件版本号
}).extend({
    tableSelect:'tableSelect',  // 插件
});

// 使用插件
layui.use(['form','table','laypage','layer','tableSelect'], function() {
    point();
    patrol();

    //巡防点
    function point() {
        var tableSelect = layui.tableSelect;
        tableSelect.render({
            elem: '#point',
            size: 'sm',//定义输入框input对象 必填
            checkedKey: 'id', //表格的唯一建值，非常重要，影响到选中状态 必填
            searchKey: 'keyword',	//搜索输入框的name值 默认keyword
            searchPlaceholder: '关键词搜索',	//搜索输入框的提示文字 默认关键词搜索
            page:false,
            table: {	//定义表格参数，与LAYUI的TABLE模块一致，只是无需再定义表格elem
                page:false,
                url:'/admin/yuanqu.patrolPoint/getPoint?sjkey=0',
                cols: [[
                    {type: 'checkbox' },
                    {field:'id',title:'编号',width:60,sortable:true},
                    {field:'point',title:'巡防点名称',minWidth:150,sortable:true},
                    {field:'adress',title:'巡防点地址',minWidth:150,sortable:true},
                ]],
                done: function (res, curr, count) {
                }
            },
            done: function (elem, data) {
                var NEWJSON = [];   // 下拉框的输入的值
                var idjson=[];
                layui.each(data.data, function (index, item) {
                    NEWJSON.push(item.point);
                    idjson.push(item.id);
                })
                elem.val(NEWJSON.join(","));  // 下拉框里面显示选中的值
                $('input[name="point_id"]').val(idjson.join(","));
            }
        })
    }

    //巡防人员
    function patrol() {
        var tableSelect = layui.tableSelect;
        tableSelect.render({
            elem: '#patrol',
            size: 'sm',//定义输入框input对象 必填
            checkedKey: 'id', //表格的唯一建值，非常重要，影响到选中状态 必填
            searchKey: 'keyword',	//搜索输入框的name值 默认keyword
            searchPlaceholder: '关键词搜索',	//搜索输入框的提示文字 默认关键词搜索
            page:false,
            table: {	//定义表格参数，与LAYUI的TABLE模块一致，只是无需再定义表格elem
                page:false,
                url:'/admin/yuanqu.patrol/getPatrol?sjkey=0',
                cols: [[
                    {type: 'radio' },
                    {field:'id',title:'编号',width:60,sortable:true},
                    {field:'realname',title:'名称',minWidth:100,sortable:true},
                    {field:'gender',title:'性别',minWidth:80, sortable:true},
                    {field:'phone',title:'手机号',minWidth:120, sortable:true},
                ]]
            },
            done: function (elem, data) {
                var NEWJSON = [];
                var idjson=[]
                layui.each(data.data, function (index, item) {
                    NEWJSON.push(item.realname);
                    idjson.push(item.id);
                })
                elem.val(NEWJSON.join(",")); // 下拉框里面显示选中的值
                $('input[name="patrol_id"]').val(idjson.join(","));
            }
        })
    }
})

</script>

layui.define(['table', 'jquery', 'form'], function (exports) {
    // "use strict";

    var MOD_NAME = 'tableSelect',
        $ = layui.jquery,
        table = layui.table,
        form = layui.form;
    var tableSelect = function () {
        this.v = '1.1.0';
        this.cacheObj ={};
    };

    /**
    * 初始化表格选择器
    */
    tableSelect.prototype.render = function (opt) {
        var elem = $(opt.elem);
        var tableDone = opt.table.done || function(){};
		
        //默认设置
        opt.searchKey = opt.searchKey || 'keyword';
        opt.searchPlaceholder = opt.searchPlaceholder || '关键词搜索';
        opt.checkedKey = opt.checkedKey;
        opt.table.page = opt.table.page==undefined?true:opt.table.page;
        opt.table.size = "sm";
        opt.table.height = opt.table.height || 315;

        var functionVar=function(e) {
            e.stopPropagation();
            if(document.getElementById("tableSelectSearchInput")){
                $("#tableSelectSearchInput").val(elem.val())
                var e = document.createEvent("Event");
                e.initEvent("oninput", true, true);
                document.getElementById("tableSelectSearchInput").dispatchEvent(e);
                $("#tableSelectSearchInput").trigger("oninput");
            }

            if($('div.tableSelect').length >= 1){
                return false;
            }
            var t = elem.offset().top + elem.outerHeight()+"px";
            var l = elem.offset().left +"px";
            var tableName = "tableSelect_table_" + new Date().getTime();
            var tableBox = '<div class="tableSelect layui-anim layui-anim-upbit" style="left:'+l+';top:'+t+';border: 1px solid #d2d2d2;background-color: #fff;box-shadow: 0 2px 4px rgba(0,0,0,.12);padding:10px 10px 0 10px;position: absolute;z-index:66666666;margin: 5px 0;border-radius: 2px;min-width:530px;">';
            tableBox += '<div class="tableSelectBar">';
            tableBox += '<form lay-filter="tableSelectForm" id="tableSelectForm" class="layui-form" action="" style="display:inline-block;">';
            tableBox += '<input id="tableSelectSearchInput" οninput="layui.tableSelect.searchInput(\''+tableName+'\');" style="display:inline-block;width:190px;height:26px;vertical-align:middle;margin-right:-1px;border: 1px solid #C9C9C9;" type="text" name="'+opt.searchKey+'" placeholder="'+opt.searchPlaceholder+'" autocomplete="off" class="layui-input"><button class="layui-btn layui-btn-sm layui-btn-primary tableSelect_btn_search" lay-submit lay-filter="tableSelect_btn_search"><i class="layui-icon layui-icon-search"></i></button>';
            tableBox += '</form>';
            tableBox += '<button style="float:right;" class="layui-btn layui-btn-sm tableSelect_btn_select">选择<span></span></button>';
            tableBox += '</div>';
            tableBox += '<table id="'+tableName+'" lay-filter="'+tableName+'"></table>';
            tableBox += '</div>';
            tableBox = $(tableBox);
            $('body').append(tableBox);

            //数据缓存
            var checkedData = [];

            //渲染TABLE
            opt.table.elem = "#"+tableName;
            opt.table.id = tableName;
            opt.table.done = function(res, curr, count){
                defaultChecked(res, curr, count);
                setChecked(res, curr, count);
                tableDone(res, curr, count);
            };
            var tableSelect_table = table.render(opt.table);
            tableSelect.cacheObj[tableName]=tableSelect_table;

            //分页选中保存数组
            table.on('radio('+tableName+')', function(obj){
                if(opt.checkedKey){
                    checkedData = table.checkStatus(tableName).data
                }
                updataButton(table.checkStatus(tableName).data.length)
            })
            table.on('checkbox('+tableName+')', function(obj){
                if(opt.checkedKey){
                    if(obj.checked){
                        for (var i=0;i<table.checkStatus(tableName).data.length;i++){
                            checkedData.push(table.checkStatus(tableName).data[i])
                        }
                    }else{
                        if(obj.type=='all'){
                            for (var j=0;j<table.cache[tableName].length;j++) {
                                for (var i=0;i<checkedData.length;i++){
                                    if(checkedData[i][opt.checkedKey] == table.cache[tableName][j][opt.checkedKey]){
                                        checkedData.splice(i,1)
                                    }
                                }
                            }
                        }else{
                            //因为LAYUI问题，操作到变化全选状态时获取到的obj为空，这里用函数获取未选中的项。
                            function nu (){
                                var noCheckedKey = '';
                                for (var i=0;i<table.cache[tableName].length;i++){
                                    if(!table.cache[tableName][i].LAY_CHECKED){
                                        noCheckedKey = table.cache[tableName][i][opt.checkedKey];
                                    }
                                }
                                return noCheckedKey
                            }
                            var noCheckedKey = obj.data[opt.checkedKey] || nu();
                            for (var i=0;i<checkedData.length;i++){
                                if(checkedData[i][opt.checkedKey] == noCheckedKey){
                                    checkedData.splice(i,1);
                                }
                            }
                        }
                    }
                    checkedData = uniqueObjArray(checkedData, opt.checkedKey);
                    updataButton(checkedData.length)
                }else{
                    updataButton(table.checkStatus(tableName).data.length)
                }
            });

            //渲染表格后选中
            function setChecked (res, curr, count) {
                for(var i=0;i<res.data.length;i++){
                    for (var j=0;j<checkedData.length;j++) {
                        if(res.data[i][opt.checkedKey] == checkedData[j][opt.checkedKey]){
                            res.data[i].LAY_CHECKED = true;
                            var index= res.data[i]['LAY_TABLE_INDEX'];
                            var checkbox = $('#'+tableName+'').next().find('tr[data-index=' + index + '] input[type="checkbox"]');
                            checkbox.prop('checked', true).next().addClass('layui-form-checked');
                            var radio  = $('#'+tableName+'').next().find('tr[data-index=' + index + '] input[type="radio"]');
                            radio.prop('checked', true).next().addClass('layui-form-radioed').find("i").html('&#xe643;');
                        }
                    }
                }
                var checkStatus = table.checkStatus(tableName);
                if(checkStatus.isAll){
                    $('#'+tableName+'').next().find('.layui-table-header th[data-field="0"] input[type="checkbox"]').prop('checked', true);
                    $('#'+tableName+'').next().find('.layui-table-header th[data-field="0"] input[type="checkbox"]').next().addClass('layui-form-checked');
                }
                updataButton(checkedData.length)
            }

            //写入默认选中值(puash checkedData)
            function defaultChecked (res, curr, count){
                if(opt.checkedKey && elem.attr('ts-selected')){
                    var selected = elem.attr('ts-selected').split(",");
                    for(var i=0;i<res.data.length;i++){
                        for(var j=0;j<selected.length;j++){
                            if(res.data[i][opt.checkedKey] == selected[j]){
                                checkedData.push(res.data[i])
                            }
                        }
                    }
                    checkedData = uniqueObjArray(checkedData, opt.checkedKey);
                }
            }

            //更新选中数量
            function updataButton (n) {
                tableBox.find('.tableSelect_btn_select span').html(n==0?'':'('+n+')')
            }

            //数组去重
            function uniqueObjArray(arr, type){
                var newArr = [];
                var tArr = [];
                if(arr.length == 0){
                    return arr;
                }else{
                    if(type){
                        for(var i=0;i<arr.length;i++){
                            if(!tArr[arr[i][type]]){
                                newArr.push(arr[i]);
                                tArr[arr[i][type]] = true;
                            }
                        }
                        return newArr;
                    }else{
                        for(var i=0;i<arr.length;i++){
                            if(!tArr[arr[i]]){
                                newArr.push(arr[i]);
                                tArr[arr[i]] = true;
                            }
                        }
                        return newArr;
                    }
                }
            }

            //FIX位置
            var overHeight = (elem.offset().top + elem.outerHeight() + tableBox.outerHeight() - $(window).scrollTop()) > $(window).height();
            var overWidth = (elem.offset().left + tableBox.outerWidth()) > $(window).width();
            overHeight && tableBox.css({'top':'auto','bottom':'0px'});
            overWidth && tableBox.css({'left':'auto','right':'5px'})

            //关键词搜索
            form.on('submit(tableSelect_btn_search)', function(data){
                tableSelect_table.reload({
                    where: data.field
                    // page: {
                    //   curr: 1
                    // }
                });
                return false;
            });

            //双击行选中
            table.on('rowDouble('+tableName+')', function(obj){
                var checkStatus = {data:[obj.data]};
                selectDone(checkStatus);
            })

            //按钮选中
            tableBox.find('.tableSelect_btn_select').on('click', function() {
                var checkStatus = table.checkStatus(tableName);
                if(checkedData.length > 1){
                    checkStatus.data = checkedData;
                }
                selectDone(checkStatus);
            })

            //写值回调和关闭
            function selectDone (checkStatus){
                if(opt.checkedKey){
                    var selected = [];
                    for(var i=0;i<checkStatus.data.length;i++){
                        selected.push(checkStatus.data[i][opt.checkedKey])
                    }
                    elem.attr("ts-selected",selected.join(","));
                }
                opt.done(elem, checkStatus);
                tableBox.remove();
                delete table.cache[tableName];
                checkedData = [];
            }

            //点击其他区域关闭
            $(document).mouseup(function(e){
                var userSet_con = $(''+opt.elem+',.tableSelect');
                if(!userSet_con.is(e.target) && userSet_con.has(e.target).length === 0){
                    tableBox.remove();
                    delete table.cache[tableName];
                    delete tableSelect.cacheObj[tableName];
                    checkedData = [];
                }
            });
        }
        elem.off('click').on('click',functionVar);
        elem.off('input').on('input',functionVar);
    }

    /**
    * 隐藏选择器
    */
    tableSelect.prototype.hide = function (opt) {
        $('.tableSelect').remove();
    }

    tableSelect.prototype.searchInput = debounce(function (seltablename) {
        tableSelect.cacheObj[seltablename].reload({
            where: form.val("tableSelectForm")
            // page: {
            //     curr: 1
            // }
        });
    },100)

    // 第四版（立即执行，停止触发 n 秒后，才可以重新触发执行。反过来）
    function debounce(func, wait, immediate) {
        // immediate默认为false
        var timeout, args, context, timestamp, result;

        var later = function() {
            // 当wait指定的时间间隔期间多次调用_.debounce返回的函数，则会不断更新timestamp的值，导致last < wait && last >= 0一直为true，从而不断启动新的计时器延时执行func
            var last = Date.now() - timestamp;

            if(last < wait && last >= 0) {
                timeout = setTimeout(later, wait - last);
            } else {
                timeout = null;
                if(!immediate) {
                    result = func.apply(context, args);
                    if(!timeout) context = args = null;
                }
            }
        };
        return function() {
            context = this;
            args = arguments;
            timestamp = Date.now();
            // 第一次调用该方法时，且immediate为true，则调用func函数
            var callNow = immediate && !timeout;
            // 在wait指定的时间间隔内首次调用该方法，则启动计时器定时调用func函数
            if(!timeout) timeout = setTimeout(later, wait);
            if(callNow) {
                result = func.apply(context, args);
                context = args = null;
            }

            return result;
        };
    };

    //自动完成渲染
    var tableSelect = new tableSelect();

    //FIX 滚动时错位
    if(window.top == window.self){
        $(window).scroll(function () {
            tableSelect.hide();
        });
    }

    exports(MOD_NAME, tableSelect);
})