import React from 'react';
import DataGrid, { Column, Summary, TotalItem, MasterDetail, Paging } from 'devextreme-react/data-grid';
import { Slider, Tooltip } from 'devextreme-react/slider';
import { productsStore, ordersStore, getOrderCount, addOrder } from './data.js';
import DataSource from 'devextreme/data/data_source';
const dataSource = new DataSource({
store: productsStore,
reshapeOnPush: true
});
class App extends React.Component {
constructor(props) {
super(props);
this.state = {
updateFrequency: 100
};
this.onUpdateFrequencyChanged = this.onUpdateFrequencyChanged.bind(this);
this.detailRender = this.detailRender.bind(this);
setInterval(() => {
if(getOrderCount() > 500000) {
return;
}
for(var i = 0; i < this.state.updateFrequency / 20; i++) {
addOrder();
}
}, 50);
}
render() {
return (
<div>
<DataGrid
dataSource={dataSource}
repaintChangesOnly={true}
columnAutoWidth={true}
showBorders={true}>
<Paging defaultPageSize={10} />
<Column
dataField="ProductName"
dataType="string" />
<Column
dataField="UnitPrice"
dataType="number"
format="currency" />
<Column
dataField="OrderCount"
dataType="number" />
<Column
dataField="Quantity"
dataType="number" />
<Column
dataField="Amount"
dataType="number"
format="currency" />
<Summary>
<TotalItem column="ProductName" summaryType="count" />
<TotalItem column="Amount" summaryType="sum" displayFormat="{0}" valueFormat="currency" />
<TotalItem column="OrderCount" summaryType="sum" displayFormat="{0}" />
</Summary>
<MasterDetail
enabled={true}
render={this.detailRender}>
</MasterDetail>
</DataGrid>
<div className="options">
<div className="caption">Options</div>
<div className="option">
<span>Update frequency:</span>
<Slider
min={10}
step={10}
max={5000}
value={this.state.updateFrequency}
onValueChanged={this.onUpdateFrequencyChanged}>
<Tooltip
enabled={true}
format="#0 per second"
showMode="always"
position="top">
</Tooltip>
</Slider>
</div>
</div>
</div>
);
}
detailRender(detail) {
return (
<DataGrid
dataSource={this.getDetailGridDataSource(detail.data)}
repaintChangesOnly={true}
columnAutoWidth={true}
showBorders={true}>
<Paging defaultPageSize={5} />
<Column
dataField="OrderID"
dataType="number" />
<Column
dataField="ShipCity"
dataType="string" />
<Column
dataField="OrderDate"
dataType="datetime"
format="yyyy/MM/dd HH:mm:ss" />
<Column
dataField="UnitPrice"
dataType="number"
format="currency" />
<Column
dataField="Quantity"
dataType="number" />
<Column
caption="Amount"
dataType="number"
format="currency"
allowSorting={true}
calculateCellValue={this.getAmount} />
<Summary>
<TotalItem column="OrderID" summaryType="count" />
<TotalItem column="Quantity" summaryType="sum" displayFormat="{0}" />
<TotalItem column="Amount" summaryType="sum" displayFormat="{0}" valueFormat="currency" />
</Summary>
</DataGrid>
);
}
onUpdateFrequencyChanged(e) {
this.setState({
updateFrequency: e.value
});
}
getDetailGridDataSource(product) {
return {
store: ordersStore,
reshapeOnPush: true,
filter: ['ProductID', '=', product.ProductID]
};
}
getAmount(order) {
return order.UnitPrice * order.Quantity;
}
}
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(
<App />,
document.getElementById('app')
);
<!DOCTYPE html>
<html>
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.5/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.5/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import('./index.js');
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
.options {
padding: 20px;
margin-top: 20px;
background-color: rgba(191, 191, 191, 0.15);
}
.caption {
font-size: 18px;
font-weight: 500;
}
.option {
margin-top: 10px;
}
.option > span {
position: relative;
top: 2px;
margin-right: 10px;
}
.option > .dx-widget {
width: 500px;
display: inline-block;
vertical-align: middle;
}
import ArrayStore from 'devextreme/data/array_store';
const cities = ['Los Angeles', 'Denver', 'Bentonville', 'Atlanta', 'Reno', 'Beaver', 'Malibu', 'Phoenix', 'San Diego', 'Little Rock', 'Pasadena', 'Boise', 'San Jose', 'Chatsworth', 'San Fernando', 'South Pasadena', 'San Fernando Valley', 'La Canada', 'St. Louis'];
const orders = [];
const products = [];
for(let i = 1; i <= 100; i++) {
products.push({ ProductID: i, ProductName: `Product ${ i}`, UnitPrice: Math.floor(Math.random() * 1000) + 1, Quantity: 0, Amount: 0, OrderCount: 0 });
}
export const productsStore = new ArrayStore({
key: 'ProductID',
data: products
});
export const ordersStore = new ArrayStore({
key: 'OrderID',
data: orders
});
export function getOrderCount() {
return orders.length;
}
export function addOrder() {
const product = products[Math.round(Math.random() * 99)];
const order = {
OrderID: orders.length ? orders[orders.length - 1].OrderID + 1 : 20001,
ShipCity: cities[Math.round(Math.random() * (cities.length - 1))],
ProductID: product.ProductID,
UnitPrice: product.UnitPrice,
OrderDate: new Date(),
Quantity: Math.round(Math.random() * 20) + 1
};
ordersStore.push([{ type: 'insert', data: order }]);
productsStore.push([{
type: 'update',
key: order.ProductID,
data: {
OrderCount: product.OrderCount + 1,
Quantity: product.Quantity + order.Quantity,
Amount: product.Amount + order.UnitPrice * order.Quantity
}
}]);
}
System.config({
transpiler: 'plugin-babel',
meta: {
'devextreme/localization.js': {
"esModule": true
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@16.14.0/umd/react.development.js',
'react-dom': 'npm:react-dom@16.14.0/umd/react-dom.development.js',
'prop-types': 'npm:prop-types@15.7.2/prop-types.js',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.5',
'devextreme-react': 'npm:devextreme-react@20.2.5',
'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.9.8/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.11/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.18/dist/dx-gantt.js',
'preact': 'npm:preact@10.5.11/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.11/hooks/dist/hooks.js',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js'
},
packages: {
'devextreme': {
defaultExtension: 'js'
},
'devextreme-react': {
main: 'index.js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
});