1. 

            formulas :
            {
                isBinding : function()
                {
                    var _provider = this.$.gridPanel.getDataProvider();
                    
                    return UT.isNotEmpty(_provider) && _provider.filterItems({bw_type:"PR"}).length > 0;
                },
            },





                
                var _itv = setInterval(function()
                {
                    if (me.formula("isBinding"))
                    {
                        clearInterval(_itv);
                        console.log("completed");
                    }
                    else
                    {
                        console.log("not completed");
                    }
                }, 300);

2. 

                <sc-grid id="pkgGridPanel" 
                         class="flex-4"
                         collapsible="true"
                         use-state="false"
                         use-selection="true"
                         use-dummy="true" 
                         use-selection="[[!singleSelect]]"
                         selection-mode="[[formula('selectionMode')]]"
                         data-provider="{{pkgList}}"
                         on-selection-checked="onSelectionChecked"
                         on-item-click="onDataCellClicked">
                          
                    <cc-grid-toolbar title-text="Package정보" on-item-count-changed="onItemCountChanged">
                        <sc-button text="선택" on-click="onSelection"></sc-button>
                    </cc-grid-toolbar>

            onItemCountChanged : function(event)
            {
                var me = this;
                var grid = event.currentTarget.scGrid;
                var provider = grid.getDataProvider();
                
                switch (grid.id)
                {
                    case "pkgGridPanel" :
                        if (!me.gridBindingCompleted && grid.provider.rowCount() > 0)
                        {
                            me.gridBindingCompleted = true;
                            
                            // 자동선택
                            if (UT.isNotEmpty(me.searchParam.pack_no))
                            {
                                var rowIndexes = provider.filterIndexes(function(data)
                                {
                                    return data.pack_no == me.searchParam.pack_no;
                                });

                                if (UT.isNotEmpty(rowIndexes))
                                {
                                    grid.setCurrentCell({dataField:"pack_nm", rowIndex:rowIndexes[0]});

                                    var _item = grid.getCurrentCell();
                                    var _data = provider.getItemAt(_item.rowIndex);

                                    grid.fire("item-click", {data:_data, item:_item, provider:provider});
                                }
                            }
                        }

                        if (grid.provider.rowCount() == 0)
                        {
                            me.gridBindingCompleted = false;
                        }
                        break;
                }
            }