グリッド:行の高さの自動調整(非同期)

大量のデータを含むグリッド上のすべての行の自動サイズ調整は、時間がかかるプロセスです。 このサンプルは、パフォーマンスを向上させるために行を読み込み時に非同期で自動サイズ設定する方法を示します。 スクロールして新しい行が表示されると、まだ自動サイズ変更されていない行のみを自動サイズ設定します。グリッドの上のボタンをクリックすると、同期処理で全ての行を自動サイズ設定します。同期処理は非同期処理よりも多くの時間がかかります。

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjGrid from '@mescius/wijmo.grid'; import { getCountries } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // // create some random data var data = []; for (var i = 0; i < 10000; i++) { data.push({ id: i, countries: getCountries(), sales: Math.random() * 10000, expenses: Math.random() * 5000 }); } // // show the data in a grid with fixed height var theGrid = new wjGrid.FlexGrid('#theGrid', { autoGenerateColumns: false, columns: [ { binding: 'id', header: 'ID', minWidth: 60, isReadOnly: true }, { binding: 'countries', header: '国', width: 150, wordWrap: true }, { binding: 'sales', header: '売上' }, { binding: 'expenses', header: '費用' } ], // // auto-size all rows when they are loaded loadedRows: (s, e) => { autoSizeRowsAsync(s); }, // // auto-size all rows when a wrapping column is resized resizedColumn: (s, e) => { if (s.columns[e.col].wordWrap) { autoSizeRowsAsync(s); } }, // // auto-size a single row when a wrapping cell is edited cellEditEnded: (s, e) => { if (s.columns[e.col].wordWrap) { autoSizeRowsAsync(s, e.row); } }, // // autosize rows within view that haven't been autosized yet scrollPositionChanged: (s, e) => { var vr = s.viewRange; for (var r = vr.topRow; r <= vr.bottomRow; r++) { if (s.rows[r].height == null) { s.autoSizeRows(r, r); //console.log('autosized row ' + r) } } }, // // load some data itemsSource: data }); // // reset row heights to null and raise scrollPositionChanged event // to auto-size the rows that are in view and haven't been auto-sized function autoSizeRowsAsync(grid, rowIndex) { if (rowIndex != null) { grid.rows[rowIndex].height = null; } else { grid.rows.forEach(row => { row.height = null; }); } setTimeout(() => { grid.onScrollPositionChanged(); }); } // // synchronouse auto-size (to show how long it would take) document.getElementById('asSync').addEventListener('click', () => { var start = Date.now(); theGrid.autoSizeRows(); alert('すべての行の高さが自動調整されるまでの時間: ' + (Date.now() - start) + 'ms'); }); // }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexGrid Auto-Size Rows asynchronously</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"> <button id="asSync" class="btn btn-primary">行の高さの自動調整(同期)</button> <div id="theGrid"></div> </div> </body> </html>
export function getCountries() { var countries = 'オーストリア,ベルギー,カナダ,デンマーク,エストニア,フィンランド,ドイツ,ハンガリー,アイルランド,日本,韓国,レバノン,メキシコ,ノルウェー,ポルトガル,カタール,ルーマニア,スペイン,トルコ,ウクライナ,ベネズエラ,ザイール'.split(','); var c = []; var cnt = Math.round(Math.random() * 8) + 1; var start = Math.round(Math.random() * countries.length); for (var i = 0; i < cnt; i++) { c.push(countries[(i + start) % countries.length]); } return c.join(', '); }
body { margin-bottom: 36pt; } .wj-flexgrid { max-height: 300px; margin: 6px 0; }
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: 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.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.nav': 'npm:@mescius/wijmo.nav/index.js', '@mescius/wijmo.odata': 'npm:@mescius/wijmo.odata/index.js', '@mescius/wijmo.olap': 'npm:@mescius/wijmo.olap/index.js', '@mescius/wijmo.rest': 'npm:@mescius/wijmo.rest/index.js', '@mescius/wijmo.pdf': 'npm:@mescius/wijmo.pdf/index.js', '@mescius/wijmo.pdf.security': 'npm:@mescius/wijmo.pdf.security/index.js', '@mescius/wijmo.viewer': 'npm:@mescius/wijmo.viewer/index.js', '@mescius/wijmo.xlsx': 'npm:@mescius/wijmo.xlsx/index.js', '@mescius/wijmo.undo': 'npm:@mescius/wijmo.undo/index.js', '@mescius/wijmo.interop.grid': 'npm:@mescius/wijmo.interop.grid/index.js', '@mescius/wijmo.touch': 'npm:@mescius/wijmo.touch/index.js', '@mescius/wijmo.cloud': 'npm:@mescius/wijmo.cloud/index.js', '@mescius/wijmo.barcode': 'npm:@mescius/wijmo.barcode/index.js', '@mescius/wijmo.barcode.common': 'npm:@mescius/wijmo.barcode.common/index.js', '@mescius/wijmo.barcode.composite': 'npm:@mescius/wijmo.barcode.composite/index.js', '@mescius/wijmo.barcode.specialized': 'npm:@mescius/wijmo.barcode.specialized/index.js', 'jszip': 'npm:jszip/dist/jszip.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' }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'js' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);