コンボボックス:連鎖されたコンボボックス

このサンプルは、フィルターと連結を使用して2つのComboBoxesを連鎖させる方法を示します。最初のComboBoxのソースは、2番目のComboBoxのオプションを除外するために使用されます。下の最初のComboBoxから国を選択すると、2番目の国はその国の都市のみを表示するようにフィルタされます。

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; // import * as input from '@grapecity/wijmo.input'; import { getCountries, getCities } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // create country and city combos let cmbCountry = new input.ComboBox('#cmbCountry', { displayMemberPath: 'name', itemsSource: getCountries() }); let cmbCity = new input.ComboBox('#cmbCity', { displayMemberPath: 'name', itemsSource: getCities() }); // filter city view based on currently selected country cmbCity.collectionView.filter = (city) => { return city.country === cmbCountry.collectionView.currentItem.id; }; cmbCountry.collectionView.currentChanged.addHandler(() => { cmbCity.collectionView.refresh(); // apply the filter }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Chaining 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"> <div id="cmbCountry"></div> <div id="cmbCity"></div> </div> </body> </html>
// export function getCountries() { return [ { id: 0, name: 'アメリカ' }, { id: 1, name: 'ドイツ' }, { id: 2, name: 'イギリス' }, { id: 3, name: '日本' }, { id: 4, name: 'イタリア' }, { id: 5, name: 'ギリシャ' } ]; } // export function getCities() { return [ { id: 0, country: 0, name: 'ワシントン' }, { id: 1, country: 0, name: 'マイアミ' }, { id: 2, country: 0, name: 'シアトル' }, { id: 3, country: 1, name: 'ボン' }, { id: 4, country: 1, name: 'ミュンヘン' }, { id: 5, country: 1, name: 'ベルリン' }, { id: 6, country: 2, name: 'ロンドン' }, { id: 7, country: 2, name: 'オックスフォード' }, { id: 8, country: 2, name: 'マンチェスター' }, { id: 9, country: 3, name: '東京' }, { id: 10, country: 3, name: '仙台' }, { id: 11, country: 3, name: '神戸' }, { id: 12, country: 4, name: 'ローマ' }, { id: 13, country: 4, name: 'フィレンツェ' }, { id: 14, country: 4, name: 'ミラノ' }, { id: 15, country: 5, name: 'アテネ' }, { id: 16, country: 5, name: 'サントリーニ' }, { id: 17, country: 5, name: 'テーベ' } ]; }
body { margin-bottom: 24px; }
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