CollectionView 그룹화

CollectionView는 필드를 기준으로 항목을 그룹화할 수 있습니다. groupDescriptions 속성에는 그룹화된 항목 목록이 포함되어 있습니다. 샘플은 groupDescriptions 속성에 항목을 추가/제거하는 방법을 보여 주며, 그룹화된 항목을 FlexGrid에 표시합니다.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; // import * as wijmo from '@grapecity/wijmo'; import * as grid from '@grapecity/wijmo.grid'; import { getData } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // create a CollectionView let view = new wijmo.CollectionView(getData(), { currentItem: null, sortDescriptions: [new wijmo.SortDescription('sales', false)] }); // // show the data in a grid let flex = new grid.FlexGrid('#theGrid', { itemsSource: view, alternatingRowStep: 0, headersVisibility: 'Column' }); // // change the grouping document.addEventListener('change', e => { // remove the old groups view.groupDescriptions.clear(); // // add the new groups let filter = e.target; if (filter.value) { filter.value.split(',').forEach((prop) => { // group sales by value ranges let pgd; if (prop == 'sales') { pgd = new wijmo.PropertyGroupDescription(prop, (item) => { if (item.sales > 8000) return 'High'; if (item.sales > 4000) return 'Medium'; return 'Low'; }); } else { // group others by value pgd = new wijmo.PropertyGroupDescription(prop); } view.groupDescriptions.push(pgd); }); } }); // // dump grouped data to console (no grid) document.querySelector('#btnDump').addEventListener('click', () => { if (!view.groups) { console.log('*** no groups'); } else { console.log('*** ' + view.groups.length + ' groups:'); view.groups.forEach(group => dumpGroup(group, '')); } }); // function dumpGroup(group, level) { // show information for this group let propName = group.groupDescription['propertyName'], groupName = group.name, groupInfo = propName + ' > ' + groupName; // group summary // groupInfo += ' (' + group.items.length + ' items)'; // item count groupInfo += ' total sales: ' + wijmo.Globalize.format(group.getAggregate(wijmo.Aggregate.Sum, 'sales'), 'c2'); console.log(level + groupInfo); // // show subgroups if (group.groups) { group.groups.forEach(child => dumpGroup(child, level + ' ')); } } }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity CollectionView Grouping</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"> <label> <input type="radio" name="filter" value="" checked="true" /> No Grouping </label> <label> <input type="radio" name="filter" value="country" /> By Country </label> <label> <input type="radio" name="filter" value="country,product" /> By Country and by Product </label> <label> <input type="radio" name="filter" value="country,product,sales" /> By Country, Product, and Sales </label> <p> <button id="btnDump" class="btn btn-default"> Show Result on Console </button> </p> <div id="theGrid"> </div> </div> </body> </html>
// export function getData() { let countries = ['US', 'Germany', 'UK', 'Japan', 'Italy', 'Greece'], products = ['Piano', 'Violin', 'Flute', 'Guitar', 'Cello'], data = []; // for (let i = 0; i < 1000; i++) { data.push({ id: i, country: countries[i % countries.length], product: products[i % products.length], sales: Math.random() * 10000, expenses: Math.random() * 5000 }); } // return data; }
.wj-flexgrid { max-height: 250px; } label { width: 100% }
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