Accordion Trees (React)

Accordions are multi-pane panels that keep only one panel expanded at a time. They are commonly used for navigation. You can use the TreeView control to implement accordions. This sample creates an Accordion using the TreeView and CSS by customizing the header display, hiding glyphs and setting autoCollapse property to true.

Learn about Wijmo | TreeView Styling and CSS Documentation | 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 { TreeView } from '@mescius/wijmo.react.nav'; import { toggleClass } from '@mescius/wijmo'; import './app.css'; import { data } from './data'; function App() { const [msg, setMsg] = useState('Ready'); const [customCSS, setCustomCSS] = useState(true); const wjTreeViewControlRef = useRef(null); const initTreeView = useEvent((ctl) => { wjTreeViewControlRef.current = ctl; wjTreeViewControlRef.current.hostElement.addEventListener("click", function (e) { if ((e.target).tagName == 'A') { setMsg(<p> Navigating to <b>** {e.target.href} **</b> </p>); e.preventDefault(); } }); toggleClass(wjTreeViewControlRef.current.hostElement, 'accordion', customCSS); }); const onCustomCSSClick = () => { toggleClass(wjTreeViewControlRef.current.hostElement, 'accordion', !customCSS); setCustomCSS(!customCSS); }; return (<div className="container-fluid"> <div> <label> Use Custom CSS{' '} <input id="customCSS" type="checkbox" checked={customCSS} onClick={onCustomCSSClick}/> </label> <div id="msg" className="msg"> {msg} </div> </div> <TreeView itemsSource={data} displayMemberPath="header" childItemsPath="items" isContentHtml={true} isAnimated={true} initialized={initTreeView}/> </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 Accordion Trees</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>
/* style for messages */ .msg { float: right; text-align: right; color: orange; } /* accordion tree styles */ /* hide collapse/expand glyphs */ .accordion.wj-treeview .wj-nodelist .wj-node:before { display: none; } /* level 0 nodes (headers) */ .accordion.wj-treeview .wj-nodelist>.wj-node { font-size: 120%; font-weight: bold; padding: 6px 10px; color: white; background: #106cc8; margin-bottom: 4px; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24); } /* level 1 nodes (navigation items) */ .accordion.wj-treeview .wj-nodelist>.wj-nodelist>.wj-node { font-size: inherit; font-weight: normal; padding: 4px 1em; color: inherit; background: inherit; box-shadow: none; } .accordion.wj-treeview .wj-nodelist { padding-bottom: 6px; } /* default trees on this sample */ .container-fluid .wj-treeview { display: block; height: 350px; 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: 'Angular', items: [ { header: '<a href="ng/intro">Introduction</a>' }, { header: '<a href="ng/samples">Samples</a>' }, { header: '<a href="ng/perf">Performance</a>' } ] }, { header: 'React', items: [ { header: '<a href="rc/intro">Introduction</a>' }, { header: '<a href="rc/samples">Samples</a>' }, { header: '<a href="rc/perf">Performance</a>' } ] }, { header: 'Vue', items: [ { header: '<a href="vue/intro">Introduction</a>' }, { header: '<a href="vue/samples">Samples</a>' }, { header: '<a href="vue/perf">Performance</a>' } ] }, { header: 'Knockout', items: [ { header: '<a href="ko/intro">Introduction</a>' }, { header: '<a href="ko/samples">Samples</a>' }, { header: '<a href="ko/perf">Performance</a>' } ] } ]; } 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', '@mescius/wijmo.chart.finance.analytics': 'npm:@mescius/wijmo.chart.finance.analytics/index.js', '@mescius/wijmo.chart.hierarchical': 'npm:@mescius/wijmo.chart.hierarchical/index.js', '@mescius/wijmo.chart.interaction': 'npm:@mescius/wijmo.chart.interaction/index.js', '@mescius/wijmo.chart.radar': 'npm:@mescius/wijmo.chart.radar/index.js', '@mescius/wijmo.chart.render': 'npm:@mescius/wijmo.chart.render/index.js', '@mescius/wijmo.chart.webgl': 'npm:@mescius/wijmo.chart.webgl/index.js', '@mescius/wijmo.chart.map': 'npm:@mescius/wijmo.chart.map/index.js', '@mescius/wijmo.gauge': 'npm:@mescius/wijmo.gauge/index.js', '@mescius/wijmo.grid': 'npm:@mescius/wijmo.grid/index.js', '@mescius/wijmo.grid.detail': 'npm:@mescius/wijmo.grid.detail/index.js', '@mescius/wijmo.grid.filter': 'npm:@mescius/wijmo.grid.filter/index.js', '@mescius/wijmo.grid.search': 'npm:@mescius/wijmo.grid.search/index.js', '@mescius/wijmo.grid.style': 'npm:@mescius/wijmo.grid.style/index.js', '@mescius/wijmo.grid.grouppanel': 'npm:@mescius/wijmo.grid.grouppanel/index.js', '@mescius/wijmo.grid.multirow': 'npm:@mescius/wijmo.grid.multirow/index.js', '@mescius/wijmo.grid.transposed': 'npm:@mescius/wijmo.grid.transposed/index.js', '@mescius/wijmo.grid.transposedmultirow': 'npm:@mescius/wijmo.grid.transposedmultirow/index.js', '@mescius/wijmo.grid.pdf': 'npm:@mescius/wijmo.grid.pdf/index.js', '@mescius/wijmo.grid.sheet': 'npm:@mescius/wijmo.grid.sheet/index.js', '@mescius/wijmo.grid.xlsx': 'npm:@mescius/wijmo.grid.xlsx/index.js', '@mescius/wijmo.grid.selector': 'npm:@mescius/wijmo.grid.selector/index.js', '@mescius/wijmo.grid.cellmaker': 'npm:@mescius/wijmo.grid.cellmaker/index.js', '@mescius/wijmo.grid.immutable': 'npm:@mescius/wijmo.grid.immutable/index.js', '@mescius/wijmo.touch': 'npm:@mescius/wijmo.touch/index.js', '@mescius/wijmo.cloud': 'npm:@mescius/wijmo.cloud/index.js', '@mescius/wijmo.nav': 'npm:@mescius/wijmo.nav/index.js', '@mescius/wijmo.odata': 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"@mescius/wijmo.react.viewer": "npm:@mescius/wijmo.react.viewer/index.js", "@mescius/wijmo.react.nav": "npm:@mescius/wijmo.react.nav/index.js", "@mescius/wijmo.react.base": "npm:@mescius/wijmo.react.base/index.js", '@mescius/wijmo.react.barcode.common': 'npm:@mescius/wijmo.react.barcode.common/index.js', '@mescius/wijmo.react.barcode.composite': 'npm:@mescius/wijmo.react.barcode.composite/index.js', '@mescius/wijmo.react.barcode.specialized': 'npm:@mescius/wijmo.react.barcode.specialized/index.js', 'jszip': 'npm:jszip/dist/jszip.js', 'react': 'npm:react/index.js', 'react-dom': 'npm:react-dom/index.js', 'react-dom/client': 'npm:react-dom/client.js', "scheduler": "npm:scheduler/index.js", 'redux': 'npm:redux/dist/redux.min.js', 'react-redux': 'npm:react-redux/dist/react-redux.min.js', 'bootstrap.css': 'npm:bootstrap/dist/css/bootstrap.min.css', 'css': 'npm:systemjs-plugin-css/css.js', 'plugin-babel': 'npm:systemjs-plugin-babel/plugin-babel.js', '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);