계산된 필드(Calculated Fields) (Angular)

CollectionView를 사용하면 계산 된 필드를 데이터 원본에 추가 할 수 있습니다.

계산된 필드의 이름과 필드 값을 가져 오는 데 사용되는 함수를 포함하는 값으로 calculatedFields 속성을 설정하면됩니다.

함수는 현재 데이터 항목을 인수로 사용하는 일반 JavaScript 함수 또는 현재 데이터 항목을 나타내는 "$"값이있는 문자열 식으로 지정될 수 있습니다.

계산 된 필드는 읽기 전용이며 종속 필드 변경 사항이 자동으로 업데이트됩니다.

참고 : IE11에서 계산 된 필드를 사용하려면 https://www.npmjs.com/package/proxy-polyfill과 같은 프록시 폴리 필을 포함해야합니다.

이 데모는 Angular를 기반으로합니다.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo-core.css'; import './styles.css'; // // import '@angular/compiler'; import { Component, enableProdMode, NgModule } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { BrowserModule } from '@angular/platform-browser'; import { WjGridModule } from '@grapecity/wijmo.angular2.grid'; import { getCalculatedView } from './app.data'; // @Component({ selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { view = getCalculatedView(); } // @NgModule({ imports: [WjGridModule, BrowserModule], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } // enableProdMode(); // Bootstrap application with hash style navigation and global services. platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo CollectionView Editing</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="node_modules/systemjs/dist/system.src.js"></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"> <wj-flex-grid [alternatingRowStep]="0" [showMarquee]="true" selectionMode="MultiRange" [autoGenerateColumns]="false" [itemsSource]="view"> <!-- regular fields --> <wj-flex-grid-column binding="product" header="Product"></wj-flex-grid-column> <wj-flex-grid-column binding="brand" header="Brand"></wj-flex-grid-column> <wj-flex-grid-column binding="unitPrice" header="Unit Price" format="c"></wj-flex-grid-column> <wj-flex-grid-column binding="qty" header="Quantity" format="n0"></wj-flex-grid-column> <wj-flex-grid-column binding="discount" header="Discount" format="p0"></wj-flex-grid-column> <!-- calculated fields --> <wj-flex-grid-column binding="fullName" header="Full Name" cssClass="calculated"></wj-flex-grid-column> <wj-flex-grid-column binding="allCaps" header="Uppercase" cssClass="calculated"></wj-flex-grid-column> <wj-flex-grid-column binding="totalPrice" header="Total Price" format="c" cssClass="calculated"></wj-flex-grid-column> <wj-flex-grid-column binding="tax" header="Tax Amount" format="c" cssClass="calculated"></wj-flex-grid-column> </wj-flex-grid> </div>
import { CollectionView } from '@grapecity/wijmo'; // some raw data export interface IDataItem { product: string, brand: string, unitPrice: number, qty: number, discount: number } export function getData(): IDataItem[] { return [ { product: 'Banana', brand: 'Chiquita', unitPrice: 45.95, qty: 12, discount: .08 }, { product: 'Apple', brand: 'Granny', unitPrice: 65.95, qty: 23, discount: .02 }, { product: 'Orange', brand: 'Sunkist', unitPrice: 52.95, qty: 16, discount: .04 }, { product: 'Grape', brand: 'Pinot', unitPrice: 83.95, qty: 8, discount: .0 }, { product: 'Watermelon', brand: '', unitPrice: 13.95, qty: 14, discount: .05 }, { product: 'Mango', brand: 'Ganesh', unitPrice: 38.95, qty: 19, discount: .15 }, ]; } // add calculated fields export interface ICalcDataItem extends IDataItem { fullName: string; allCaps: string; totalPrice: number, tax: number; } export function getCalculatedView(): CollectionView<ICalcDataItem> { return new CollectionView(getData(), { calculatedFields: { // function-based expressions fullName: ($: ICalcDataItem) => [$.brand, $.product].join(' '), allCaps: ($: ICalcDataItem) => $.fullName.toUpperCase(), totalPrice: ($: ICalcDataItem) => ($.unitPrice * $.qty) * (1 - $.discount), tax: ($: ICalcDataItem) => $.totalPrice * 0.12, // string-based expressions fullNameStr: '[$.brand, $.product].join(" ")', allCapsStr: '$.fullNameStr.toUpperCase()', totalPriceStr: '($.unitPrice * $.qty) * (1 - $.discount)', taxStr: '$.totalPrice * 0.12', } }); }
.calculated { background-color: azure; }
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