Node Checkboxes (React)

The TreeNodes can be displayed with a Checkbox by setting the TreeView.showCheckboxes property to true.

This setting causes the TreeView to add checkboxes to each node. When users check or uncheck nodes, the TreeView raises the checkedItemsChanged event.

You can use the checkedItems property to get or set the list of checked items. The list of checked items includes only items that are checked and have no child nodes (the checked state of parent nodes is determined by the checked state of their children).

Learn about Wijmo | TreeView API Reference

This example uses React.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React, { useRef, useState } from 'react'; import useEvent from 'react-use-event-hook'; import * as wjNav from '@mescius/wijmo.react.nav'; import './app.css'; import { data } from './data'; function App() { const [tvChkStatus, setTvChkStatus] = useState(null); const [checkedItems, setCheckedItems] = useState([]); const wjTreeViewControlRef = useRef(null); const initTreeView = useEvent((ctl) => { wjTreeViewControlRef.current = ctl; }); const onCheckedItemsChanged = () => { let items = wjTreeViewControlRef.current.checkedItems, msg = [], li = []; if (items.length) { for (let i = 0; i < items.length; i++) { li.push((<li> {items[i].header} </li>)); } msg.push(<p><b>Checked Items:</b></p>); msg.push(<ol>{li}</ol>); } setTvChkStatus(msg); }; const onCheckAllClick = () => { wjTreeViewControlRef.current.checkAllItems(true); }; const onUncheckAllClick = () => { wjTreeViewControlRef.current.checkAllItems(false); }; const onSaveStateClick = () => { setCheckedItems(wjTreeViewControlRef.current.checkedItems || []); }; const onRestoreStateClick = () => { wjTreeViewControlRef.current.checkedItems = checkedItems; }; return (<div className="container-fluid"> <wjNav.TreeView itemsSource={data} displayMemberPath="header" childItemsPath="items" showCheckboxes={true} checkedItemsChanged={onCheckedItemsChanged} initialized={initTreeView}/> <button id="btnCheckAll" className="btn btn-default" onClick={onCheckAllClick}> Check All </button> <button id="btnUncheckAll" className="btn btn-default" onClick={onUncheckAllClick}> Uncheck All </button> &nbsp;&nbsp;&nbsp;&nbsp; <button id="btnSaveState" className="btn btn-default" onClick={onSaveStateClick}> Save State </button> <button id="btnRestoreState" className="btn btn-default" onClick={onRestoreStateClick}> Restore State </button> <div id="tvChkStatus">{tvChkStatus}</div> </div>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo Wijmo TreeView Checkbox Nodes</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
.container-fluid .wj-treeview { display: block; font-size: 120%; margin-bottom: 8px; padding: 6px; background: #f0f0f0; box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23); }
function getData() { return [ { header: 'Electronics', items: [ { header: 'Trimmers/Shavers' }, { header: 'Tablets' }, { header: 'Phones', items: [ { header: 'Apple' }, { header: 'Motorola', newItem: true }, { header: 'Nokia' }, { header: 'Samsung' } ] }, { header: 'Speakers', newItem: true }, { header: 'Monitors' } ] }, { header: 'Toys', items: [ { header: 'Shopkins' }, { header: 'Train Sets' }, { header: 'Science Kit', newItem: true }, { header: 'Play-Doh' }, { header: 'Crayola' } ] }, { header: 'Home', items: [ { header: 'Coffee Maker' }, { header: 'Breadmaker', newItem: true }, { header: 'Solar Panel', newItem: true }, { header: 'Work Table' }, { header: 'Propane Grill' } ] } ]; } export const data = getData();
(function (global) { window.process = { env: { NODE_ENV: "production" } } System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true, react: true }, meta: { '*.css': { loader: 'css' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { 'jszip': 'npm:jszip/dist/jszip.js', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', 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'systemjs-babel-build':'npm:systemjs-plugin-babel/systemjs-babel-browser.js', "react-use-event-hook": "npm:react-use-event-hook/dist/esm/useEvent.js", }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'jsx' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);