Aggregates (Angular)

FlexGrid's columns have an aggregate property that allows you to show data summaries for the whole grid or for each group. To show group aggregates, set the aggregate property on the columns that you want to aggregate, and create groups by dragging the column headers into the group panel above the grid. Notice how the group rows contain the sum of the 'Sales' and 'Expenses' columns for each group. The aggregates are updated automatically when you edit the data.

Group aggregates can adjust their display positions with the groupSummaryPosition property, which offers Top (the default), Bottom, and Auto options. In the Auto setting, the Group Summary Row appears at the bottom of the group when it is expanded, and at the top when the group is collapsed. Notice the shift in the position of group summaries when you change the Group Summary Position value via the dropdown menu.

Learn about FlexGrid | Aggregate Groups Documentation | FlexGrid API Reference

This example uses Angular.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; import '@angular/compiler'; import { Component, enableProdMode, ɵresolveComponentResources } from '@angular/core'; import { BrowserModule, bootstrapApplication } from '@angular/platform-browser'; import { WjGridModule } from '@mescius/wijmo.angular2.grid'; import { WjGridGrouppanelModule } from '@mescius/wijmo.angular2.grid.grouppanel'; import { WjInputModule } from '@mescius/wijmo.angular2.input'; import { GroupSummaryPosition } from '@mescius/wijmo.grid'; @Component({ standalone: true, imports: [WjGridModule, WjGridGrouppanelModule, WjInputModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { data: any[]; groupSummaryPosition= GroupSummaryPosition.Top; groupSummaryPositionOptions = 'Top,Bottom,Auto'.split(','); // DataSvc will be passed by derived classes constructor() { this.data = this._getData(); } // change the groupSummaryPosition value setgroupSummaryPosition(value: number) { this.groupSummaryPosition = value; } private _getData() { // create some random data let countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), products = 'Phones,Computers,Cameras,Stereos'.split(','), data = []; for (let i = 0; i < 200; 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; } } 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 FlexGrid Aggregate Group</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"> <wj-group-panel style="display: block;" [grid]="flex" [placeholder]="'Drag columns here to create groups'"> </wj-group-panel> <!-- the grid --> <wj-flex-grid #flex [(itemsSource)]="data" [groupSummaryPosition]="groupSummaryPosition"> <wj-flex-grid-column [binding]="'id'" [header]="'ID'" [width]="60" [isReadOnly]="true"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'country'" [header]="'Country'"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'product'" [header]="'Product'"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'sales'" [header]="'Sales'" [aggregate]="'Sum'"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'expenses'" [header]="'Expenses'" [aggregate]="'Sum'"></wj-flex-grid-column> </wj-flex-grid> <label> Group Summary Position <wj-combo-box #cmbGroupPos [itemsSource]="groupSummaryPositionOptions" (selectedIndexChanged)="setgroupSummaryPosition(cmbGroupPos.selectedIndex)"> </wj-combo-box> </label> </div>
.wj-flexgrid { max-height: 250px; margin: 10px 0; } body { margin-bottom: 20px; }
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packages: { "./src": { defaultExtension: 'ts' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);