Multi-Column ComboBox Drop Down

You can display the items in the ComboBox in a multi-column layout. This shows 2 different approaches to modify. The first uses CSS to customize the dropdown. The second, applies custom item content and uses headerPath property to display objects in a table-like layout.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; // import * as wijmo from '@grapecity/wijmo'; import * as input from '@grapecity/wijmo.input'; import { getData } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // default style let theCombo = new input.ComboBox('#theCombo', { displayMemberPath: 'country', itemsSource: getData() }); // // multi-column CSS let theComboCSS = new input.ComboBox('#theComboCSS', { dropDownCssClass: 'cb-flex', displayMemberPath: 'country', itemsSource: getData() }); // // multi-column table-style let template = '<table><tr>' + '<td>{country}</td>' + '<td class="number" title="GDP (million US$/year)">{gdpm:c0}</td>' + '<td class="number" title="Population (thousands)">{popk:n0}</td>' + '<td class="number" title="GDP/cap (US$/person/year)">{gdpcap:c0}</td>' + '</tr></table>'; // let theComboTable = new input.ComboBox('#theComboTable', { headerPath: 'country', displayMemberPath: 'country', formatItem: (sender, e) => { e.item.innerHTML = wijmo.format(template, e.data); }, itemsSource: getData() }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Multi-Column Combos</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 class="container-fluid"> <p> By default, the ComboBox displays one item per line in its drop-down list: </p> <div class="form-group"> <label for="theCombo">Default:</label> <div id="theCombo"></div> </div> <p> If you have many short items, it may be interesting to use multiple columns in the drop-down. You can accomplish this with a little CSS and the <b>dropDownCssClass</b> property: </p> <div class="form-group"> <label for="theComboCSS">Three Columns:</label> <div id="theComboCSS"></div> </div> <p> If the items are complex objects, you may want to render a single item per line, but with additional detail, as in a table or grid. You can accomplish this with the <b>formatItem</b> event and <b>headerPath</b> property: </p> <div class="form-group"> <label for="theComboTable">Table-Style:</label> <div id="theComboTable"></div> </div> </div> </body> </html>
// list of country GDP and populations // https://en.wikipedia.org/wiki/List_of_IMF_ranked_countries_by_GDP export function getData() { return [ { id: 1, country: 'Luxembourg', gdpm: 57825, popk: 563, gdpcap: 102708 }, { id: 2, country: 'Switzerland', gdpm: 664005, popk: 8238, gdpcap: 80602 }, { id: 3, country: 'Norway', gdpm: 388315, popk: 5205, gdpcap: 74604 }, { id: 4, country: 'Macao', gdpm: 46178, popk: 647, gdpcap: 71372 }, { id: 5, country: 'Qatar', gdpm: 166908, popk: 2421, gdpcap: 68941 }, { id: 6, country: 'Ireland', gdpm: 283716, popk: 4635, gdpcap: 61211 }, { id: 7, country: 'United States', gdpm: 18036650, popk: 321601, gdpcap: 56083 }, { id: 8, country: 'Singapore', gdpm: 292734, popk: 5535, gdpcap: 52887 }, { id: 9, country: 'Denmark', gdpm: 295091, popk: 5660, gdpcap: 52136 }, { id: 10, country: 'Australia', gdpm: 1225286, popk: 23940, gdpcap: 51181 }, { id: 11, country: 'Iceland', gdpm: 16718, popk: 333, gdpcap: 50204 }, { id: 12, country: 'Sweden', gdpm: 493042, popk: 9851, gdpcap: 50049 }, { id: 13, country: 'San Marino', gdpm: 1558, popk: 31, gdpcap: 50258 }, { id: 14, country: 'Netherlands', gdpm: 750696, popk: 16937, gdpcap: 44322 }, { id: 15, country: 'United Kingdom', gdpm: 2858482, popk: 65110, gdpcap: 43902 }, { id: 16, country: 'Austria', gdpm: 374261, popk: 8621, gdpcap: 43412 }, { id: 17, country: 'Canada', gdpm: 1550537, popk: 35825, gdpcap: 43280 }, { id: 18, country: 'Finland', gdpm: 232077, popk: 5472, gdpcap: 42411 }, { id: 19, country: 'Germany', gdpm: 3365293, popk: 82176, gdpcap: 40952 }, { id: 20, country: 'Belgium', gdpm: 454288, popk: 11209, gdpcap: 40528 }, { id: 21, country: 'United Arab Emirates', gdpm: 370296, popk: 9581, gdpcap: 38648 }, { id: 22, country: 'France', gdpm: 2420163, popk: 64275, gdpcap: 37653 }, { id: 23, country: 'New Zealand', gdpm: 172257, popk: 4647, gdpcap: 37068 }, { id: 24, country: 'Israel', gdpm: 299413, popk: 8377, gdpcap: 35742 }, { id: 25, country: 'Japan', gdpm: 4124211, popk: 126981, gdpcap: 32478 }, { id: 26, country: 'Brunei Darussalam', gdpm: 12930, popk: 417, gdpcap: 31007 }, { id: 27, country: 'Italy', gdpm: 1815759, popk: 60796, gdpcap: 29866 }, { id: 28, country: 'Puerto Rico', gdpm: 102906, popk: 3474, gdpcap: 29621 }, { id: 29, country: 'Kuwait', gdpm: 114079, popk: 4110, gdpcap: 27756 }, { id: 30, country: 'South Korea', gdpm: 1377873, popk: 50617, gdpcap: 27221 }, { id: 31, country: 'Spain', gdpm: 1199715, popk: 46423, gdpcap: 25843 }, { id: 32, country: 'The Bahamas', gdpm: 8854, popk: 364, gdpcap: 24324 }, { id: 33, country: 'Bahrain', gdpm: 31119, popk: 1294, gdpcap: 24048 }, { id: 34, country: 'Cyprus', gdpm: 19330, popk: 847, gdpcap: 22821 }, { id: 35, country: 'Malta', gdpm: 9752, popk: 429, gdpcap: 22731 }, { id: 36, country: 'Taiwan', gdpm: 523006, popk: 23492, gdpcap: 22263 }, { id: 37, country: 'Slovenia', gdpm: 42798, popk: 2063, gdpcap: 20745 }, { id: 38, country: 'Saudi Arabia', gdpm: 646002, popk: 31386, gdpcap: 20582 }, { id: 39, country: 'Portugal', gdpm: 199032, popk: 10411, gdpcap: 19117 }, { id: 40, country: 'Trinidad and Tobago', gdpm: 24631, popk: 1358, gdpcap: 18137 }, { id: 41, country: 'Greece', gdpm: 195320, popk: 10858, gdpcap: 17988 }, { id: 42, country: 'Czech Republic', gdpm: 185156, popk: 10538, gdpcap: 17570 }, { id: 43, country: 'Estonia', gdpm: 22704, popk: 1313, gdpcap: 17291 }, { id: 44, country: 'Equatorial Guinea', gdpm: 13819, popk: 799, gdpcap: 17295 }, { id: 45, country: 'Oman', gdpm: 64121, popk: 3840, gdpcap: 16698 }, { id: 46, country: 'St. Kitts and Nevis', gdpm: 915, popk: 56, gdpcap: 16339 }, { id: 47, country: 'Palau', gdpm: 287, popk: 18, gdpcap: 15944 }, { id: 48, country: 'Slovakia', gdpm: 86629, popk: 5421, gdpcap: 15980 }, { id: 49, country: 'Barbados', gdpm: 4385, popk: 280, gdpcap: 15660 }, { id: 50, country: 'Uruguay', gdpm: 53107, popk: 3416, gdpcap: 15546 } ]; }
.cb-flex { display: flex; flex-wrap: wrap; width: 380px; } .cb-flex .wj-listbox-item { width: 120px; white-space: pre; overflow: hidden; text-overflow: ellipsis; } .wj-listbox-item table { table-layout: fixed; } .wj-listbox-item td { width: 120px; white-space: pre; overflow: hidden; text-overflow: ellipsis; } .wj-listbox-item td.number { width: 80px; text-align: right; } label { margin-right: 3px; } body { margin-bottom: 24px; }
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