CollectionView:フィルター

CollectionViewには、フィルター関数を指定するために使用できるfilterプロパティがあります。フィルター関数は、フィルターが適用されたときにどの項目をビューに含めるかを定義します。以下のサンプルは、filter関数によって定義されたいくつかの定義済みの「選択」フィルタを提供します。

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; import * as wijmo from '@mescius/wijmo'; import * as grid from '@mescius/wijmo.grid'; import { getData } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // // create a CollectionView let view = new wijmo.CollectionView(getData()); // // show filtered item count view.collectionChanged.addHandler(() => { let cnt = document.getElementById('cnt'); cnt.textContent = wijmo.format('{length:n0}', view.items); }); // // initialize item count display view.onCollectionChanged(); // // show the data in a grid let flex = new grid.FlexGrid('#theGrid', { autoGenerateColumns: false, columns: [ { binding: 'id', header: 'ID', width: 80 }, { binding: 'country', header: '国' }, { binding: 'downloads', header: 'DL数', width: 80 }, { binding: 'sales', header: '売上', width: 80 }, { binding: 'expenses', header: '費用', width: 80 }, ], itemsSource: view, alternatingRowStep: 0, headersVisibility: 'Column' }); // // change the filter document.addEventListener('change', e => { let filterType = e.target.value; // view.filter = (item) => { switch (filterType) { case 'country': return item.country == 'アメリカ'; case 'sales': return item.sales > 9000; case 'downloads': return item.downloads > 19000; default: return true; } }; }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo CollectionView Filtering Overview</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class="container-fluid"> <label> <input type="radio" name="filter" value="" checked="checked" /> フィルターなし </label> <label> <input type="radio" name="filter" value="country" /> アメリカのみ </label> <label> <input type="radio" name="filter" value="sales" /> 売上 > 9,000 </label> <label> <input type="radio" name="filter" value="downloads" /> DL数 > 19,000 </label> <p> 結果(<span id="cnt"></span>項目): </p> <div id="theGrid"> </div> </div> </body> </html>
// export function getData() { let countries = ['アメリカ', 'ドイツ', 'イギリス', '日本', 'イタリア', 'ギリシャ'], data = []; // for (let i = 0; i < 1000; i++) { data.push({ id: i, country: countries[i % countries.length], downloads: Math.round(Math.random() * 20000), sales: Math.random() * 10000, expenses: Math.random() * 5000 }); } // return data; }
.wj-flexgrid { max-height: 250px; } label { width: 100% }
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