Header Merging (Angular)

The FlexGrid supports content-driven cell merging in column header cells. This is accomplished by adding another row object to the columnHeaders panel of the grid and then merging the desired cells.

Learn about FlexGrid | FlexGrid API Reference

This example uses Angular.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; // import * as wjCore from '@mescius/wijmo'; import * as wjGrid from '@mescius/wijmo.grid'; 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, DataItem } from './app.data'; // @Component({ standalone: true, providers: [DataService], imports: [WjGridModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { data: DataItem[]; // DataSvc will be passed by derived classes constructor(@Inject(DataService) private dataService: DataService) { this.data = dataService.getData(); } // onInitialized(grid: wjGrid.FlexGrid) { // create extra header row var extraRow = new wjGrid.Row(); extraRow.allowMerging = true; // // add extra header row to the grid var panel = grid.columnHeaders; panel.rows.splice(0, 0, extraRow); // // populate the extra header row for (let colIndex = 1; colIndex <= 2; colIndex++) { panel.setCellData(0, colIndex, 'Amounts'); } // // merge "Country" and "Active" headers vertically ['country', 'active'].forEach(function (binding) { let col = grid.getColumn(binding); col.allowMerging = true; panel.setCellData(0, col.index, col.header); }); // // center-align merged header cells grid.formatItem.addHandler(function (s: wjGrid.FlexGrid, e: wjGrid.FormatItemEventArgs) { if (e.panel == s.columnHeaders && e.range.rowSpan > 1) { var html = e.cell.innerHTML; e.cell.innerHTML = '<div class="v-center">' + html + '</div>'; } }); } } //\\ // 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 Header Merging</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-flex-grid #grid [itemsSource]="data" [allowMerging]="'ColumnHeaders'" [alternatingRowStep]="0" [autoGenerateColumns]="false" (initialized)="onInitialized(grid)"> <wj-flex-grid-column [binding]="'country'" [header]="'Country'" [allowMerging]=true></wj-flex-grid-column> <wj-flex-grid-column [binding]="'sales'" [header]="'Sales'" [format]="'n2'"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'expenses'" [header]="'Expenses'" [format]="'n2'"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'active'" [header]="'Active'" [allowMerging]=true></wj-flex-grid-column> </wj-flex-grid> </div>
import { Injectable } from '@angular/core'; export interface DataItem { id: number; country: string; active: boolean; downloads: number; sales: number; expenses: number; } @Injectable() export class DataService { getData(): DataItem[] { var countries = 'US,Germany,UK,Japan'.split(','); var data = []; for (var i = 0; i < 20; i++) { data.push({ id: i, country: countries[i % countries.length], active: i % 5 != 0, downloads: Math.round(Math.random() * 200000), sales: Math.random() * 100000, expenses: Math.random() * 50000 }); } return data; } }
.wj-flexgrid { max-height: 200px; margin-bottom: 12px; } .wj-cell .v-center { position: relative; top: 50%; transform: translateY(-50%); white-space: pre-wrap; } body { margin-bottom: 24px; }
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packages: { "./src": { defaultExtension: 'ts' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);