jqGrid中的自定义聚合/分组

Question

概述

我需要通过巧妙的技巧，黑客攻击或修改插件来以某种方式自定义jqGrid插件，以支持以下类型的聚合/分组。

我非常感谢jqGrid社区关于如何实现这一点的一些想法。

详情

聚合/分组的工作原理如下。

用户最初会看到如下所示的数据网格，根据“第1列”进行分组。注意超链接（例如“+5”）;这些超链接表示“折叠”行，其中这些行中的所有数据对于除具有超链接的列之外的所有列具有相同的值。

例如，通过单击“+5”链接，表格将展开以显示之前折叠为一行的5行（替换包含“+5”链接的折叠行）。请注意，现在扩展的行在第2列中都具有唯一值，以前具有“+5”链接。

关于如何实现这一点的任何想法？是否可以使用任何其他网格插件？

Answer 1

jqGrid不直接支持您需要的这种分组，因此必须实现某种手动分组。

分组本身应该在服务器上完成，服务器响应应该包含扩展行和拼贴行。我不太清楚如何扩展一个组链接应该如何工作，所以我描述了如何实现每行一个链接的gruping。另一方面，我决定实施先前扩展的行的崩溃。我这样做是为了关注JSON数据中包含的其他信息。

让我们服务器生成以下JSON数据：

{
  "total": 1,
  "page": 1,
  "records": 15,
  "rows" : [
    {"id":"1", "collapseTo":{"id":"6","colName":"column2"}, "expandTo":null, "column1":"534345345", "column2":"3523423423", "column3":"8563564", "column4":"75683", "column5":"4756436", "column6":"87689768", "column7":"8755"},
    {"id":"2", "collapseTo":{"id":"6","colName":"column2"}, "expandTo":null, "column1":"534345345", "column2":"545345343", "column3":"8563564", "column4":"75683", "column5":"4756436", "column6":"7689768", "column7":"8755"},
    {"id":"3", "collapseTo":{"id":"6","colName":"column2"}, "expandTo":null, "column1":"534345345", "column2":"4234235", "column3":"8563564", "column4":"75683", "column5":"4756436", "column6":"7689768", "column7":"8755"},
    {"id":"4", "collapseTo":{"id":"6","colName":"column2"}, "expandTo":null, "column1":"534345345", "column2":"3242323", "column3":"8563564", "column4":"75683", "column5":"4756436", "column6":"7689768", "column7":"8755"},
    {"id":"5", "collapseTo":{"id":"6","colName":"column2"}, "expandTo":null, "column1":"534345345", "column2":"6453334", "column3":"8563564", "column4":"75683", "column5":"4756436", "column6":"7689768", "column7":"8755"},
    {"id":"6", "collapseTo":null, "expandTo":{"column2":["1","2","3","4","5"]}, "column1":"534345345", "column2":"+5", "column3":"8563564", "column4":"75683", "column5":"4756436", "column6":"7689768", "column7":"8755"},
    {"id":"7", "collapseTo":{"id":"9","colName":"column4"}, "expandTo":null, "column1":"763484", "column2":"773845358", "column3":"7657565663", "column4":"87546598", "column5":"75675634", "column6":"89058", "column7":"3453463"},
    {"id":"8", "collapseTo":{"id":"9","colName":"column4"}, "expandTo":null, "column1":"763484", "column2":"773845358", "column3":"7657565663", "column4":"98976989", "column5":"75675634", "column6":"89058", "column7":"3453463"},
    {"id":"9", "collapseTo":null, "expandTo":{"column4":["7","8"]}, "column1":"763484", "column2":"773845358", "column3":"7657565663", "column4":"+2", "column5":"75675634", "column6":"89058", "column7":"3453463"},
    {"id":"10", "collapseTo":{"id":"17","colName":"column6"}, "expandTo":null, "column1":"5378756", "column2":"75675473", "column3":"264523", "column4":"423543", "column5":"34534534", "column6":"909424", "column7":"9768768"},
    {"id":"11", "collapseTo":{"id":"17","colName":"column6"}, "expandTo":null, "column1":"5378756", "column2":"75675473", "column3":"264523", "column4":"423543", "column5":"34534534", "column6":"22934920", "column7":"9768768"},
    {"id":"12", "collapseTo":{"id":"17","colName":"column6"}, "expandTo":null, "column1":"5378756", "column2":"75675473", "column3":"264523", "column4":"423543", "column5":"34534534", "column6":"124376325", "column7":"9768768"},
    {"id":"13", "collapseTo":{"id":"17","colName":"column6"}, "expandTo":null, "column1":"5378756", "column2":"75675473", "column3":"264523", "column4":"423543", "column5":"34534534", "column6":"36727845", "column7":"9768768"},
    {"id":"14", "collapseTo":{"id":"17","colName":"column6"}, "expandTo":null, "column1":"5378756", "column2":"75675473", "column3":"264523", "column4":"423543", "column5":"34534534", "column6":"6856345", "column7":"9768768"},
    {"id":"15", "collapseTo":{"id":"17","colName":"column6"}, "expandTo":null, "column1":"5378756", "column2":"75675473", "column3":"264523", "column4":"423543", "column5":"34534534", "column6":"43536366", "column7":"9768768"},
    {"id":"16", "collapseTo":{"id":"17","colName":"column6"}, "expandTo":null, "column1":"5378756", "column2":"75675473", "column3":"264523", "column4":"423543", "column5":"34534534", "column6":"76543686", "column7":"9768768"},
    {"id":"17", "collapseTo":null, "expandTo":{"column6":["10","11","12","13","14","15","16"]}, "column1":"5378756", "column2":"75675473", "column3":"264523", "column4":"423543", "column5":"34534534", "column6":"+7", "column7":"9768768"}
  ]
}

可以使用隐藏列来保存其他信息。我使用而不是jQuery.data来更有效地保存信息。具有分组链接的行在JSON数据中包含"expandTo":{"column2":["1","2","3","4","5"]}之类的信息。其他行包含"expandTo":null。在loadComplete内，我们可以隐藏所有"expandTo":null行。在其他行中，我们将一些列的包含转换为链接。例如，如果expandTo有{"column2":["1","2","3","4","5"]}，那么我们应该将项目从列“column2”转换为链接。作为链接上的点击操作，我们将隐藏该行，并使数组["1","2","3","4","5"]中的所有行都可见。

演示此演示的演示文稿可以找到here。点击链接后，将扩展分组。双击展开的行后，折叠行并在之前的状态下停用网格。

相应的代码是：

var grid = $("#list"),
    myExpanding = function(e) {
        var myData = $(this).data("expandTo"), i, l;
        if (myData && typeof(myData.length) !== "undefined" && myData.length>0) {
            for (i=0,l=myData.length; i<l; i++) {
                $("#"+myData[i]).show();
            }
            $(this).closest("tr").hide();
        }
        e.preventDefault();
    }, cmNameToIndex = {};

grid.jqGrid({
    datatype:'json',
    url:'CustomGrouping.json',
    colNames:[//'Expand To',
        'Column 1','Column 2','Column 3','Column 4','Column 5','Column 6','Column 7'],
    colModel:[
        //{name:'expandTo', width:1, hidden:true},
        {name:'column1'},
        {name:'column2'},
        {name:'column3'},
        {name:'column4'},
        {name:'column5'},
        {name:'column6'},
        {name:'column7'}
    ],
    cmTemplate:{width:85,align:'center',sortable:false},
    rowNum:10000,
    gridview:true,
    jsonReader:{repeatitems: false},
    loadComplete: function(data) {
        var i=0, rows = data.rows, l = rows.length, cm = grid[0].p.colModel, rowid,
            idToItem = {}, item;
        // The ids of the rows which has in the first column (expandTo) the information
        // about rows which should be expanded will be saved in the nonHiddenRows array.
        // For the rows the expandingInfo[rowid]
        for(; i<l; i++) {
            item = rows[i];
            idToItem[item.id] = item;
        }
        // fill cmNameToIndex to find easier the column index by column name
        cmNameToIndex = {};
        for (i=0,l=cm.length;i<l;i++){
            cmNameToIndex[cm[i].name] = i;
        }
        $("tr.jqgrow",this).each(function(){
            var tr=$(this), colName, linkInfo, td, rowid = this.id, item = idToItem[rowid];
            //if ($.inArray(rowid,nonHiddenRows) !== -1) {
            if (item && item.expandTo) {
                //tr.show();
                linkInfo = item.expandTo;
                for (colName in linkInfo) {
                    if (linkInfo.hasOwnProperty(colName)) {
                        i = cmNameToIndex[colName];
                        td = $("td:nth-child("+(i+1)+")",this);
                        td.wrapInner($('<a>',
                                       {
                                         href:"#",
                                         click:myExpanding,
                                       }).data("expandTo",linkInfo[colName]));
                    }
                }
            } else {
                tr.hide();
            }
            if (item && item.collapseTo) {
                tr.data("collapseTo",item.collapseTo)
            }
        });
    },
    ondblClickRow: function(rowid, iRow, iCol, e) {
        var tr = $("#"+rowid), tr1 = $(e.target,grid[0].rows).closest("tr.jqgrow"),
            collapse = tr.data("collapseTo"), i, ids, l;
        if (collapse && collapse.id && collapse.colName) {
            i = cmNameToIndex[collapse.colName];
            tr = $("#"+collapse.id);
            ids = $("a", tr[0].cells[i]).data("expandTo");
            if (ids && ids.length) {
                tr.show();
                for(i=0,l=ids.length; i<l; i++) {
                    $("#"+ids[i]).hide();
                }
            }
        }
    },
    height: '100%'
});