ExtJs4 grid合并行

代码实现

/**
 * Kunoy
 * 合并单元格
 * @param {} grid  要合并单元格的grid对象
 * @param {} cols  要合并哪几列 [1,2,4]
 */
var mergeCells = function (grid, cols) {
    var arrayTr = document.getElementById(grid.getId() + "-body").firstChild.firstChild.firstChild.getElementsByTagName('tr');
    var trCount = arrayTr.length;
    var arrayTd;
    var td;
    var merge = function (rowspanObj, removeObjs) { //定义合并函数
        if (rowspanObj.rowspan != 1) {
            arrayTd = arrayTr[rowspanObj.tr].getElementsByTagName("td"); //合并行
            td = arrayTd[rowspanObj.td - 1];
            td.rowSpan = rowspanObj.rowspan;
            td.vAlign = "middle";
            Ext.each(removeObjs, function (obj) { //隐身被合并的单元格
                arrayTd = arrayTr[obj.tr].getElementsByTagName("td");
                arrayTd[obj.td - 1].style.display = 'none';
            });
        }
    };
    var rowspanObj = {}; //要进行跨列操作的td对象{tr:1,td:2,rowspan:5}
    var removeObjs = []; //要进行删除的td对象[{tr:2,td:2},{tr:3,td:2}]
    var col;
    Ext.each(cols, function (colIndex) { //逐列去操作tr
        var rowspan = 1;
        var divHtml = null;//单元格内的数值
        for (var i = 1; i < trCount; i++) {  //i=0表示表头等没用的行
            arrayTd = arrayTr[i].getElementsByTagName("td");
            var cold = 0;
//          Ext.each(arrayTd,function(Td){ //获取RowNumber列和check列
//              if(Td.getAttribute("class").indexOf("x-grid-cell-special") != -1)
//                  cold++;
//          });
            col = colIndex + cold;//跳过RowNumber列和check列
            if (!divHtml) {
                divHtml = arrayTd[col - 1].innerHTML;
                rowspanObj = {tr: i, td: col, rowspan: rowspan}
            } else {
                var cellText = arrayTd[col - 1].innerHTML;
                var addf = function () {
                    rowspanObj["rowspan"] = rowspanObj["rowspan"] + 1;
                    removeObjs.push({tr: i, td: col});
                    if (i == trCount - 1)
                        merge(rowspanObj, removeObjs);//执行合并函数
                };
                var mergef = function () {
                    merge(rowspanObj, removeObjs);//执行合并函数
                    divHtml = cellText;
                    rowspanObj = {tr: i, td: col, rowspan: rowspan}
                    removeObjs = [];
                };
                if (cellText == divHtml) {
                    if (colIndex != cols[0]) {
                        var leftDisplay = arrayTd[col - 2].style.display;//判断左边单元格值是否已display
                        if (leftDisplay == 'none')
                            addf();
                        else
                            mergef();
                    } else
                        addf();
                } else
                    mergef();
            }
        }
    });
};

调用方法

在app.js文件Ext.onReady方法内调用：

Ext.getCmp('grid').getStore().on('load',function(){  
    mergeCells(Ext.getCmp('grid'),[1,2]);  
});