ExtJs中gridpanel分组后组名排序

 /**

  * 定义降序的groupingStore

  */

var DescGroupingStore = Ext.extend(Ext.data.GroupingStore, {

groupDir : 'ASC',

groupBy : function(field, forceRegroup, direction) {

    direction = direction ? (String(direction)

              .toUpperCase() == 'DESC' ? 'DESC' : 'ASC')

              : this.groupDir;

    if (this.groupField == field

           this.groupDir == direction && !forceRegroup) {

          return;

   }

   this.groupField = field;

   this.groupDir = direction;

   if (this.remoteGroup) {

       if (!this.baseParams) {

          this.baseParams = {};

       }

       this.baseParams['groupBy'] = field;

          this.baseParams['groupDir'] = direction;

       }

       if (this.groupOnSort) {

            this.sort(field, direction);

            return;

       }

       if (this.remoteGroup) {

            this.reload();

       } else {

            var si = this.sortInfo || {};

            if (si.field != field || si.direction != direction) {

                this.applySort();

            } else {

                this.sortData(field, direction);

            }

            this.fireEvent('datachanged', this);

        }

    },

    applySort : function() {

        Ext.data.GroupingStore.superclass.applySort.call(this);

        if (!this.groupOnSort && !this.remoteGroup) {

            if (this.groupField != this.sortInfo.field

                    || this.groupDir != this.sortInfo.direction) {

                this.sortData(this.groupField, this.groupDir);

            }

        }

    },

    applyGrouping : function(alwaysFireChange) {

        if (this.groupField !== false) {

            this.groupBy(this.groupField, true, this.groupDir);

            return true;

        } else {

            if (alwaysFireChange === true) {

                this.fireEvent('datachanged', this);

            }

            return false;

        }

    }

});

/*************************调用***************************/

// 消息列表数据源

var messageStore = new DescGroupingStore({

    proxy : new Ext.data.HttpProxy({

        url : "listMessGrid.action"

    }),

    reader : myReader,

    groupDir : 'DESC',

    groupField : 'status',

    sortInfo : {

        field : 'id',

        direction : "DESC"

    }

});

messageStore.load();

/*****************在gridpanel中添加如下属性*************************************/

view : new Ext.grid.GroupingView({

    showGroupName : false,

    groupTextTpl : '{gvalue}:{text} ({[values.rs.length]} {[values.rs.length > 1 ? "封" : "封"]})',

    showGroupsText : "ddd"

})