CollectionView 그룹화 (Angular)

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.

이 데모는 Angular를 기반으로합니다.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; // import * as wijmo from '@mescius/wijmo'; // import '@angular/compiler'; import { Component, Inject, enableProdMode, ɵresolveComponentResources } from '@angular/core'; import { BrowserModule, bootstrapApplication } from '@angular/platform-browser'; import { WjGridModule } from '@mescius/wijmo.angular2.grid'; import { DataService, TDataItem } from './app.data'; // @Component({ standalone: true, providers: [DataService], imports: [WjGridModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html', }) export class AppComponent { private view: wijmo.CollectionView; // constructor(@Inject(DataService) private dataService: DataService) { this.view = new wijmo.CollectionView(dataService.getData(), { currentItem: null, sortDescriptions: [new wijmo.SortDescription('sales', false)], }); // // change the grouping document.addEventListener('change', (e) => { // remove the old groups this.view.groupDescriptions.clear(); // // add the new groups let filter = e.target as HTMLInputElement; if (filter.value) { filter.value.split(',').forEach((prop: string) => { // group sales by value ranges let pgd: wijmo.PropertyGroupDescription; if (prop == 'sales') { pgd = new wijmo.PropertyGroupDescription(prop, (item: TDataItem) => { if (item.sales > 8000) return 'High'; if (item.sales > 4000) return 'Medium'; return 'Low'; }); } else { // group others by value pgd = new wijmo.PropertyGroupDescription(prop); } this.view.groupDescriptions.push(pgd); }); } }); } // dumpData() { if (!this.view.groups) { console.log('*** no groups'); } else { console.log('*** ' + this.view.groups.length + ' groups:'); this.view.groups.forEach((group) => this.dumpGroup(group, '')); } } // private dumpGroup(group: wijmo.CollectionViewGroup, level: string) { // 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) => this.dumpGroup(child, level + ' ')); } } } // // enableProdMode(); // Resolve resources (templateUrl, styleUrls etc), After resolution all URLs have been converted into `template` strings. ɵresolveComponentResources(fetch).then(() => { // Bootstrap application bootstrapApplication(AppComponent).catch((err) => console.error(err)); });
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo CollectionView Grouping</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- Polyfills --> <script src="node_modules/core-js/client/shim.min.js"></script> <script src="node_modules/zone.js/fesm2015/zone.min.js"></script> <!-- 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> // workaround to load 'rxjs/operators' from the rxjs bundle System.import('rxjs').then(function (m) { System.set(SystemJS.resolveSync('rxjs/operators'), System.newModule(m.operators)); System.import('./src/app.component'); }); </script> </head> <body> <app-component></app-component> </body> </html>
<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 class="btn btn-default" (click)="dumpData()"> Show Result on Console </button> </p> <wj-flex-grid [itemsSource]="view" [alternatingRowStep]="0" [headersVisibility]="'Column'"> </wj-flex-grid> </div>
import { Injectable } from '@angular/core'; // export type TDataItem = { id: number; country: string; product: string; sales: number; expenses: number; } // @Injectable() export class DataService { getData() { let countries = ['US', 'Germany', 'UK', 'Japan', 'Italy', 'Greece'], products = ['Piano', 'Violin', 'Flute', 'Guitar', 'Cello'], data: TDataItem[] = []; // 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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