ExtJs中Grid下拉框联动

selModel: {
        //键盘导航， false则键盘操作无效
        enableKeyNav: true,
        //选择模式 SINGLE, SIMPLE, 和 MULTI
        mode: 'MULTI',
        //点击checkbox框选中
        checkOnly: false,
        //在表头显示全选checkbox框
        showHeaderCheckbox: true,
        //复选框选择模式Ext.selection.CheckboxModel
        selType: 'checkboxmodel',
        allowDeselect: true
    },

{
            text: bizI18n_hr.hrProdAccidentItem.effectUnit,
            width: 110,
            align: 'center',
            dataIndex: 'effectUnit',
            editor: {
                xtype: 'comboSearchUtil',
                table: '(select * from sadp_md_common_types t where t.type_id<>\'HR_EFFECT_UNIT\' start with t.type_id=\'HR_EFFECT_UNIT\' connect by prior t.sid = t.parent_sid) sadp_md_common_types',
                tableKey: 'type_id',
                tableValue: 'type_name',
                orderField: 'type_seq',
                filterName: 'type_id',
                emptyText: translations.pleaseInput,
                msgTarget: 'under',
                listeners: {
                    change: function (combo, nV, oV) {
                        combo.up('grid').getSelectionModel().getSelection()[0].set("accidentCode", "");
                    }
                }
            }
        },
        {
            text: bizI18n_hr.hrProdAccidentItem.accidentCode,
            width: 120,
            align: 'center',
            dataIndex: 'accidentCode',
            editor: {
                xtype: 'comboSearchUtil',
                table: '(select * from sadp_md_common_types t where t.type_id<>\'HR_ACCIDENT_CODE\' start with t.type_id=\'HR_ACCIDENT_CODE\' connect by prior t.sid = t.parent_sid) sadp_md_common_types',
                tableKey: 'type_id',
                tableValue: 'type_name',
                orderField: 'type_seq',
                filterName: 'type_desc',
                emptyText: translations.pleaseInput,
                msgTarget: 'under',
                listeners: {
                    focus: function (combo) {
                        var effectUnit = combo.up('grid').getSelectionModel().getSelection()[0].data.effectUnit;
                        var store = combo.getStore();
                        var params = store.proxy.extraParams;
                        params['qm.filterValue'] = effectUnit;
                        store.load();
                    }
                }
            },
            renderer:function (v) {
                return getCommonTypeItemName('HR_ACCIDENT_CODE',v);
            }
        },