Tree Grids (React)

If your data items contain collections of child items, you may use the FlexGrid's childItemsPath to show the data as a tree. For example, consider a list of 'person' objects which have a 'children' property. The 'children' property contains an array of more person objects. This is sometimes called a homogeneous hierarchy. The grid below was built by binding the grid to the top-level persons list and setting the childItemsPath property to 'children':

This example uses React.

import "@grapecity/wijmo.styles/wijmo.css"; import "bootstrap.css"; import "./app.css"; // import * as React from 'react'; import * as ReactDOM from 'react-dom'; // import { FlexGrid, FlexGridColumn } from "@grapecity/wijmo.react.grid"; import { getFamilies, getWorkers } from "./data"; class App extends React.Component { constructor(props) { super(props); this.state = { showAsTree: true, family: getFamilies(), workers: getWorkers(), }; } render() { return <div className="container-fluid"> <label> Show as Tree:{' '} <input type="checkbox" checked={this.state.showAsTree} onChange={e => { this.setState({ showAsTree: !this.state.showAsTree }); }}/> </label> <FlexGrid itemsSource={this.state.family} headersVisibility="None" childItemsPath={this.state.showAsTree ? 'children' : ''}> <FlexGridColumn binding="name" header="Name" width="*"/> </FlexGrid> <p> There are also 'heterogeneous' hierarchies, where items at different levels have different types and different child item properties.</p> <p> For example, the grid below is bound to a collection of 'worker' objects which receive 'checks' which list 'earnings':</p> <FlexGrid headersVisibility="Column" childItemsPath={['checks', 'earnings']} itemsSource={this.state.workers}> <FlexGridColumn binding="name" header="Name"/> <FlexGridColumn binding="hours" dataType="Number" allowSorting={false}/> <FlexGridColumn binding="rate" dataType="Number" allowSorting={false}/> </FlexGrid> </div>; } } ReactDOM.render(<App />, document.getElementById('app'));
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexGrid Tree Grids</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
.wj-flexgrid { max-height: 220px; margin: 6px 0; } .wj-cell.wj-group { border: none; } .wj-cell.wj-group:not(.wj-state-selected):not(.wj-state-multi-selected) { background-color: white; } body { margin-bottom: 24px; }
export function getFamilies() { return [ { name: 'Albert', children: [ { name: 'Anton' }, { name: 'Annette' }, ] }, { name: 'Benjamin', children: [ { name: 'Bridget', children: [ { name: 'Billy' }, { name: 'Bernard' } ] }, { name: 'Bella' }, { name: 'Bob' }, ] }, { name: 'Charlie', children: [ { name: 'Chris' }, { name: 'Connie' }, { name: 'Carrie' }, ] }, { name: 'Douglas', children: [ { name: 'Dinah' }, { name: 'Donald' } ] }, ]; } export function getWorkers() { return [{ name: 'Jack Smith', checks: [{ name: 'check1', earnings: [ { name: 'hourly', hours: 30.0, rate: 15.0 }, { name: 'overtime', hours: 10.0, rate: 20.0 }, { name: 'bonus', hours: 5.0, rate: 30.0 } ] }, { name: 'check2', earnings: [ { name: 'hourly', hours: 20.0, rate: 18.0 }, { name: 'overtime', hours: 20.0, rate: 24.0 } ] }] }, { name: 'Bill Smith', checks: [{ name: 'check1', earnings: [ { name: 'hourly', hours: 30.0, rate: 15.0 }, { name: 'overtime', hours: 10.0, rate: 20.0 }, { name: 'bonus', hours: 5.0, rate: 30.0 } ] }, { name: 'check2', earnings: [ { name: 'hourly', hours: 20.0, rate: 18.0 }, { name: 'overtime', hours: 20.0, rate: 24.0 } ] }] }, { name: 'Jane Smith', checks: [{ name: 'check1', earnings: [ { name: 'hourly', hours: 30.0, rate: 15.0 }, { name: 'overtime', hours: 10.0, rate: 20.0 }, { name: 'bonus', hours: 5.0, rate: 30.0 } ] }, { name: 'check2', earnings: [ { name: 'hourly', hours: 20.0, rate: 18.0 }, { name: 'overtime', hours: 20.0, rate: 24.0 } ] }] }]; }
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