Categorized Groups in ComboBox

This sample uses the formatItem event to disable and format specific items on the ComboBox drop-down list. The items are categorized via the incoming data, and headers are added to each category list, creating category groups.

Learn about Input Controls | ComboBox Grouping Documentation | ComboBox API Reference

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; import * as input from '@mescius/wijmo.input'; import { getOptions } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // create the combo let theCombo = new input.ComboBox('#theCombo', { displayMemberPath: 'header', formatItem: formatListItem, itemsSource: getOptions(), selectedIndex: 1 // after setting itemsSource }); // // create the AutoComplete let theAutoComplete = new input.AutoComplete('#theAutoComplete', { displayMemberPath: 'header', formatItem: formatListItem, itemsSource: getOptions(), selectedIndex: 1 // after setting itemsSource }); // // format list items to format and disable category names function formatListItem(sender, e) { let dataItem = e.data; if (dataItem.category) { e.item.classList.add('category'); e.item.classList.add('wj-state-disabled'); } } }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo Categorized ComboBox and AutoComplete</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdn.jsdelivr.net/npm/systemjs@0.21.5/dist/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <main class="container-fluid"> <div id="theCombo"></div> <p> The same technique applies to the <b>AutoComplete</b> control: </p> <div id="theAutoComplete"></div> </main> </body> </html>
// // get categorized list of options for the combo export function getOptions() { return [ { header: 'Colors', category: true }, { header: 'Red' }, { header: 'Green' }, { header: 'Blue' }, { header: 'White' }, { header: 'Black' }, { header: 'Purple' }, { header: 'Flavors', category: true }, { header: 'Chocolate' }, { header: 'Vanilla' }, { header: 'Rocky Road' }, { header: 'Almond' }, { header: 'Pineapple' }, { header: 'Strawberry' }, { header: 'Textures', category: true }, { header: 'Smooth' }, { header: 'Silky' }, { header: 'Wavy' }, { header: 'Rough' } ]; }
.wj-listbox-item.category { padding-top: 4px; padding-left: 5px; font-size: 120%; font-weight: bold; background: #f0f0f0; color: #6D6C75; position: sticky; top: 0; opacity: 1; } .wj-combobox { margin-bottom: 12px; } body { margin-bottom: 24px; }
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true, }, meta: { '*.css': { loader: 'css' }, }, paths: { // paths serve as alias 'npm:': 'node_modules/', 'cdn:': 'https://cdn.mescius.io/demoapps/packages/wijmojs/5.20261.50-rc/', 'pcdn:': 'https://cdn.jsdelivr.net/npm/' }, // map tells the System loader where to look for things map: { '@mescius/wijmo': 'cdn:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'cdn:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'cdn:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'cdn:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'cdn:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'cdn:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'cdn:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'cdn:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'cdn:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 'cdn:@mescius/wijmo.chart.finance.analytics/index.js', '@mescius/wijmo.chart.hierarchical': 'cdn:@mescius/wijmo.chart.hierarchical/index.js', '@mescius/wijmo.chart.interaction': 'cdn:@mescius/wijmo.chart.interaction/index.js', '@mescius/wijmo.chart.radar': 'cdn:@mescius/wijmo.chart.radar/index.js', '@mescius/wijmo.chart.render': 'cdn:@mescius/wijmo.chart.render/index.js', '@mescius/wijmo.chart.webgl': 'cdn:@mescius/wijmo.chart.webgl/index.js', '@mescius/wijmo.chart.map': 'cdn:@mescius/wijmo.chart.map/index.js', '@mescius/wijmo.gauge': 'cdn:@mescius/wijmo.gauge/index.js', '@mescius/wijmo.grid': 'cdn:@mescius/wijmo.grid/index.js', '@mescius/wijmo.grid.detail': 'cdn:@mescius/wijmo.grid.detail/index.js', '@mescius/wijmo.grid.filter': 'cdn:@mescius/wijmo.grid.filter/index.js', '@mescius/wijmo.grid.search': 'cdn:@mescius/wijmo.grid.search/index.js', '@mescius/wijmo.grid.style': 'cdn:@mescius/wijmo.grid.style/index.js', '@mescius/wijmo.grid.grouppanel': 'cdn:@mescius/wijmo.grid.grouppanel/index.js', '@mescius/wijmo.grid.multirow': 'cdn:@mescius/wijmo.grid.multirow/index.js', '@mescius/wijmo.grid.transposed': 'cdn:@mescius/wijmo.grid.transposed/index.js', '@mescius/wijmo.grid.transposedmultirow': 'cdn:@mescius/wijmo.grid.transposedmultirow/index.js', '@mescius/wijmo.grid.pdf': 'cdn:@mescius/wijmo.grid.pdf/index.js', '@mescius/wijmo.grid.sheet': 'cdn:@mescius/wijmo.grid.sheet/index.js', '@mescius/wijmo.grid.xlsx': 'cdn:@mescius/wijmo.grid.xlsx/index.js', '@mescius/wijmo.grid.selector': 'cdn:@mescius/wijmo.grid.selector/index.js', '@mescius/wijmo.grid.cellmaker': 'cdn:@mescius/wijmo.grid.cellmaker/index.js', '@mescius/wijmo.nav': 'cdn:@mescius/wijmo.nav/index.js', '@mescius/wijmo.odata': 'cdn:@mescius/wijmo.odata/index.js', '@mescius/wijmo.olap': 'cdn:@mescius/wijmo.olap/index.js', '@mescius/wijmo.rest': 'cdn:@mescius/wijmo.rest/index.js', '@mescius/wijmo.pdf': 'cdn:@mescius/wijmo.pdf/index.js', '@mescius/wijmo.pdf.security': 'cdn:@mescius/wijmo.pdf.security/index.js', '@mescius/wijmo.viewer': 'cdn:@mescius/wijmo.viewer/index.js', '@mescius/wijmo.xlsx': 'cdn:@mescius/wijmo.xlsx/index.js', '@mescius/wijmo.undo': 'cdn:@mescius/wijmo.undo/index.js', '@mescius/wijmo.interop.grid': 'cdn:@mescius/wijmo.interop.grid/index.js', '@mescius/wijmo.touch': 'cdn:@mescius/wijmo.touch/index.js', '@mescius/wijmo.cloud': 'cdn:@mescius/wijmo.cloud/index.js', '@mescius/wijmo.barcode': 'cdn:@mescius/wijmo.barcode/index.js', '@mescius/wijmo.barcode.common': 'cdn:@mescius/wijmo.barcode.common/index.js', '@mescius/wijmo.barcode.composite': 'cdn:@mescius/wijmo.barcode.composite/index.js', '@mescius/wijmo.barcode.specialized': 'cdn:@mescius/wijmo.barcode.specialized/index.js', jszip: 'pcdn:jszip@3.8.0/dist/jszip.js', 'bootstrap.css': 'pcdn:bootstrap@3.3.7/dist/css/bootstrap.min.css', css: 'pcdn:systemjs-plugin-css@0.1.37/css.js', 'plugin-babel': 'pcdn:systemjs-plugin-babel@0.0.25/plugin-babel.js', 'systemjs-babel-build': 'pcdn:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js', }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'js', }, node_modules: { defaultExtension: 'js', }, }, }); })(this);