4.7 饼图、柱图标签按长度折行

饼图标签

          formatter: function(param){
              return param.name +String.fromCharCode("10")
                    + param.value +String.fromCharCode("10")
                    + param.percent;
          },

柱图轴标签

    formatter:function(param){
        function fixedLengthFormatString(str,num){
            if(str == null || str == undefined) return null;
            if(!(/^[0-9]*[1-9][0-9]*$/.test(num))) return null;
            var array = "";
            var len = str.length;
            for(var i=0;i<(len/num);i++){
                if((i+1)*num < len){
                    array = array + str.substring(i*num,(i+1)*num) + String.fromCharCode("10");
                }else{
                    array = array + str.substring(i*num);
                }
            }
            return array;
        }
    return  fixedLengthFormatString(param, 5);//五个字符折行
    },