部分扩展功能总结

EasyUI中datagrid的行编辑模式中，找到特定的Editor，并为其添加事件

function editrow(index) {    

if (rowedit == 0) {        

$(‘#ZCEditList‘).datagrid(‘beginEdit‘, index);        

rowedit = 1;

        var editors = $(‘#ZCEditList‘).datagrid(‘getEditors‘, index);            

  var TonsEditor = editors[3];        

var HorsepowerEditor = editors[4];           

var StandardEditor = editors[10];         

TonsEditor.target.bind(‘blur‘, function () {            

HorsepowerEditor.target.val(‘‘);            

var sum = TonsEditor.target.val() * 10;                    

  StandardEditor.target.val(sum);

        });        

    } }

       //keyCtr 扩展方法 下上键实现选择
        $.extend($.fn.datagrid.methods, {
            keyCtr : function (jq) {
                return jq.each(function () {
                    var grid = $(this);
                    grid.datagrid(‘getPanel‘).panel(‘panel‘).attr(‘tabindex‘, 1).bind(‘keydown‘, function (e) {
                        switch (e.keyCode) {
                        case 38: // up
                            var selected = grid.datagrid(‘getSelected‘);
                            if (selected) {
                                var index = grid.datagrid(‘getRowIndex‘, selected);
                                grid.datagrid(‘selectRow‘, index - 1);
                            } else {
                                var rows = grid.datagrid(‘getRows‘);
                                grid.datagrid(‘selectRow‘, rows.length - 1);
                            }
                            break;
                        case 40: // down
                            var selected = grid.datagrid(‘getSelected‘);
                            if (selected) {
                                var index = grid.datagrid(‘getRowIndex‘, selected);
                                grid.datagrid(‘selectRow‘, index + 1);
                            } else {
                                grid.datagrid(‘selectRow‘, 0);
                            }
                            break;
                        }
                    });
                });
            }
        });

//实现统计功能$.extend($.fn.datagrid.methods, {
    statistics: function (jq) {
        var opt=$(jq).datagrid(‘options‘).columns;
        var rows = $(jq).datagrid("getRows");

        var footer = new Array();
        footer[‘sum‘] = "";
        footer[‘avg‘] = "";
        footer[‘max‘] = "";
        footer[‘min‘] = "";

        for(var i=0; i<opt[0].length; i++){
            if(opt[0][i].sum){
                footer[‘sum‘] = footer[‘sum‘] + sum(opt[0][i].field)+ ‘,‘;
            }
            if(opt[0][i].avg){
                footer[‘avg‘] = footer[‘avg‘] + avg(opt[0][i].field)+ ‘,‘;
            }
            if(opt[0][i].max){
                footer[‘max‘] = footer[‘max‘] + max(opt[0][i].field)+ ‘,‘;
            }
            if(opt[0][i].min){
                footer[‘min‘] = footer[‘min‘] + min(opt[0][i].field)+ ‘,‘;
            }
        }

        var footerObj = new Array();

        if(footer[‘sum‘] != ""){
            var tmp = ‘{‘ + footer[‘sum‘].substring(0,footer[‘sum‘].length - 1) + "}";
            var obj = eval(‘(‘ + tmp + ‘)‘);
            if(obj[opt[0][0].field] == undefined){
                footer[‘sum‘] += ‘"‘ + opt[0][0].field + ‘":"<b>当页合计:</b>"‘;
                obj = eval(‘({‘ + footer[‘sum‘] + ‘})‘);
            }else{
                obj[opt[0][0].field] = "<b>当页合计:</b>" + obj[opt[0][0].field];
            }
            footerObj.push(obj);
        }

        if(footer[‘avg‘] != ""){
            var tmp = ‘{‘ + footer[‘avg‘].substring(0,footer[‘avg‘].length - 1) + "}";
            var obj = eval(‘(‘ + tmp + ‘)‘);
            if(obj[opt[0][0].field] == undefined){
                footer[‘avg‘] += ‘"‘ + opt[0][0].field + ‘":"<b>当页均值:</b>"‘;
                obj = eval(‘({‘ + footer[‘avg‘] + ‘})‘);
            }else{
                obj[opt[0][0].field] = "<b>当页均值:</b>" + obj[opt[0][0].field];
            }
            footerObj.push(obj);
        }

        if(footer[‘max‘] != ""){
            var tmp = ‘{‘ + footer[‘max‘].substring(0,footer[‘max‘].length - 1) + "}";
            var obj = eval(‘(‘ + tmp + ‘)‘);

            if(obj[opt[0][0].field] == undefined){
                footer[‘max‘] += ‘"‘ + opt[0][0].field + ‘":"<b>当页最大值:</b>"‘;
                obj = eval(‘({‘ + footer[‘max‘] + ‘})‘);
            }else{
                obj[opt[0][0].field] = "<b>当页最大值:</b>" + obj[opt[0][0].field];
            }
            footerObj.push(obj);
        }

        if(footer[‘min‘] != ""){
            var tmp = ‘{‘ + footer[‘min‘].substring(0,footer[‘min‘].length - 1) + "}";
            var obj = eval(‘(‘ + tmp + ‘)‘);

            if(obj[opt[0][0].field] == undefined){
                footer[‘min‘] += ‘"‘ + opt[0][0].field + ‘":"<b>当页最小值:</b>"‘;
                obj = eval(‘({‘ + footer[‘min‘] + ‘})‘);
            }else{
                obj[opt[0][0].field] = "<b>当页最小值:</b>" + obj[opt[0][0].field];
            }
            footerObj.push(obj);
        }

        if(footerObj.length > 0){
            $(jq).datagrid(‘reloadFooter‘,footerObj);
        }

        function sum(filed){
            var sumNum = 0;
            for(var i=0;i<rows.length;i++){
                sumNum += Number(rows[i][filed]);
            }
            return ‘"‘ + filed + ‘":"‘ + sumNum.toFixed(2) +‘"‘;
        };

        function avg(filed){
            var sumNum = 0;
            for(var i=0;i<rows.length;i++){
                sumNum += Number(rows[i][filed]);
            }
            return ‘"‘ + filed + ‘":"‘+ (sumNum/rows.length).toFixed(2) +‘"‘;
        }

        function max(filed){
            var max = 0;
            for(var i=0;i<rows.length;i++){
                if(i==0){
                    max = Number(rows[i][filed]);
                }else{
                    max = Math.max(max,Number(rows[i][filed]));
                }
            }
            return ‘"‘ + filed + ‘":"‘+ max +‘"‘;
        }

        function min(filed){
            var min = 0;
            for(var i=0;i<rows.length;i++){
                if(i==0){
                    min = Number(rows[i][filed]);
                }else{
                    min = Math.min(min,Number(rows[i][filed]));
                }
            }
            return ‘"‘ + filed + ‘":"‘+ min +‘"‘;
        }
    }
});

用法 ：在字段中加入 sum:true;

http://www.oschina.net/code/snippet_659525_20039