Extjs grid表格根据条件判断某行是否可编辑

//grid编辑
    var grid = Ext.getCmp('gridMain');
  
    grid.addPlugin(
        Ext.create('Ext.grid.plugin.CellEditing', {
            clicksToEdit: 1
        })
    );

//单元格禁止编辑
   grid.addListener(
        'cellclick', function (table, td, cellIndex, record) {  

            var fileName;
            fileName = table.getHeaderAtIndex(cellIndex).dataIndex;
            var record = record.get("cDefine1");//grid 某列的值
            if (record == "已签收") {
                return false;
            }
           
        }
          
);

//单元格编辑
var items = grid.columns;
    Ext.each(items, function (item) {
           // STORAGEQUANTITY 是 grid的列
        if (Ext.util.Format.uppercase(item.dataIndex) == 'STORAGEQUANTITY') { 
          
            grid.columns[item.fullColumnIndex - 1].setEditor(
                Ext.create('Ext.form.TextField', {
                    readOnly: false,
                    value: '',
                    xtype: 'textfield'
                })
            )
        }
     
    })