Toolbar Customization

import React from 'react'; import Button from 'devextreme-react/button'; import SelectBox from 'devextreme-react/select-box'; import DataGrid, { Grouping, Column, ColumnChooser, LoadPanel, Toolbar, Item, } from 'devextreme-react/data-grid'; import query from 'devextreme/data/query'; import service from './data.js'; class App extends React.Component { constructor(props) { super(props); this.orders = service.getOrders(); this.state = { expanded: true, totalCount: this.getGroupCount('CustomerStoreState'), grouping: 'CustomerStoreState', }; this.groupingValues = [{ value: 'CustomerStoreState', text: 'Grouping by State', }, { value: 'Employee', text: 'Grouping by Employee', }]; this.dataGrid = null; this.groupChanged = this.groupChanged.bind(this); this.collapseAllClick = this.collapseAllClick.bind(this); this.refreshDataGrid = this.refreshDataGrid.bind(this); this.getRef = this.getRef.bind(this); } getGroupCount(groupField) { return query(this.orders) .groupBy(groupField) .toArray().length; } groupChanged(e) { const grouping = e.value; this.dataGrid.instance.clearGrouping(); this.dataGrid.instance.columnOption(grouping, 'groupIndex', 0); this.setState({ totalCount: this.getGroupCount(grouping), grouping, }); } collapseAllClick() { const newValue = !this.state.expanded; this.setState({ expanded: newValue, }); } refreshDataGrid() { this.dataGrid.instance.refresh(); } getRef(ref) { this.dataGrid = ref; window.dataGrid = this.dataGrid; } render() { return ( <DataGrid id="gridContainer" ref={this.getRef} dataSource={this.orders} keyExpr="ID" showBorders={true}> <Grouping autoExpandAll={this.state.expanded} /> <ColumnChooser enabled={true} /> <LoadPanel enabled={true} /> <Column dataField="OrderNumber" caption="Invoice Number" /> <Column dataField="OrderDate" /> <Column dataField="Employee" /> <Column dataField="CustomerStoreCity" caption="City" /> <Column dataField="CustomerStoreState" caption="State" groupIndex={0} /> <Column dataField="SaleAmount" alignment="right" format="currency" /> <Toolbar> <Item location="before"> <div className="informer"> <h2 className="count">{this.state.totalCount}</h2> <span className="name">Total Count</span> </div> </Item> <Item location="before"> <SelectBox width="225" items={this.groupingValues} displayExpr="text" valueExpr="value" value={this.state.grouping} onValueChanged={this.groupChanged} /> </Item> <Item location="before"> <Button text={this.state.expanded ? 'Collapse All' : 'Expand All'} width='136' onClick={this.collapseAllClick} /> </Item> <Item location="after"> <Button icon='refresh' onClick={this.refreshDataGrid} /> </Item> <Item name="columnChooserButton" /> </Toolbar> </DataGrid> ); } } export default App;