Restricted Merging (Angular)

By default, the FlexGrid control will merge cells that have the same content, regardless of the content of neighboring cells.

In this example, we use a custom merge manager that merges cells vertically only if the cells in the previous column contain the same value.

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, enableProdMode, ɵresolveComponentResources } from '@angular/core'; import { BrowserModule, bootstrapApplication } from '@angular/platform-browser'; import { WjGridModule } from '@mescius/wijmo.angular2.grid'; class RestrictedMergeManager extends wjGrid.MergeManager { getMergedRange(p: wjGrid.GridPanel, r: number, c: number, clip: boolean = true) { // // create basic cell range var rng = null; // // start with single cell rng = new wjGrid.CellRange(r, c); var pcol = c > 0 ? c - 1 : c; // // get reference values to use for merging var val = p.getCellData(r, c, false); var pval = p.getCellData(r, pcol, false); // // expand up while (rng.row > 0 && p.getCellData(rng.row - 1, c, false) == val && p.getCellData(rng.row - 1, pcol, false) == pval) { rng.row--; } // // expand down while (rng.row2 < p.rows.length - 1 && p.getCellData(rng.row2 + 1, c, false) == val && p.getCellData(rng.row2 + 1, pcol, false) == pval) { rng.row2++; } // // don't bother with single-cell ranges if (rng.isSingleCell) { rng = null; } // // done return rng; } } class DataItem { customer: string; country: string; downloads: number; sales: number; expenses: number; } // @Component({ standalone: true, imports: [WjGridModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { data: wjCore.CollectionView; constructor() { this.data = new wjCore.CollectionView(this._getData(), { sortDescriptions: ['customer', 'country'] }); } onInitialized(flexGrid: wjGrid.FlexGrid) { flexGrid.mergeManager = new RestrictedMergeManager(); } private _getData(): DataItem[] { // // create some random data var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), customers = 'Paul Smith,Susan Johnson'.split(','); let data = []; for (var i = 0; i < 12; i++) { data.push({ customer: customers[i % customers.length], country: countries[i % countries.length], downloads: Math.round(Math.random() * 20000), sales: Math.random() * 5000, 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 Restricted 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 #theGrid [itemsSource]="data" [autoGenerateColumns]=false [alternatingRowStep]="0" (initialized)="onInitialized(theGrid)"> <wj-flex-grid-column binding="country" header="Country" [allowMerging]=true></wj-flex-grid-column> <wj-flex-grid-column binding="customer" header="Customer" [allowMerging]=true></wj-flex-grid-column> <wj-flex-grid-column binding="downloads" header="'Downloads"></wj-flex-grid-column> <wj-flex-grid-column binding="sales" header="'Sales"></wj-flex-grid-column> <wj-flex-grid-column binding="expenses" header="'Expenses"></wj-flex-grid-column> </wj-flex-grid> </div>
.wj-flexgrid { max-height: 300px; } body { margin-bottom: 24px; }
(function (global) { SystemJS.config({ transpiler: './plugin-typescript.js', typescriptOptions: { "target": "ES2022", "module": "system", "emitDecoratorMetadata": true, "experimentalDecorators": true, }, baseURL: 'node_modules/', meta: { 'typescript': { "exports": "ts" }, '*.css': { loader: 'systemjs-plugin-css' } }, paths: { // paths serve as alias 'npm:': '' }, packageConfigPaths: [ '/node_modules/*/package.json', "/node_modules/@angular/*/package.json", "/node_modules/@mescius/*/package.json" ], map: { 'core-js': 'https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js', 'typescript': 'https://cdnjs.cloudflare.com/ajax/libs/typescript/5.2.2/typescript.min.js', "rxjs": "https://cdnjs.cloudflare.com/ajax/libs/rxjs/7.8.1/rxjs.umd.min.js", 'systemjs-plugin-css': 'https://cdn.jsdelivr.net/npm/systemjs-plugin-css@0.1.37/css.js', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 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'https://cdnjs.cloudflare.com/ajax/libs/jszip/3.10.1/jszip.min.js', "@angular/common/http": "https://cdn.jsdelivr.net/npm/@angular/common@16.2.6/fesm2022/http.mjs", "@angular/core": "https://cdn.jsdelivr.net/npm/@angular/core@16.2.6/fesm2022/core.mjs", "@angular/platform-browser": "https://cdn.jsdelivr.net/npm/@angular/platform-browser@16.2.6/fesm2022/platform-browser.mjs", "@angular/common": "https://cdn.jsdelivr.net/npm/@angular/common@16.2.6/fesm2022/common.mjs", "@angular/compiler": "https://cdn.jsdelivr.net/npm/@angular/compiler@16.2.6/fesm2022/compiler.mjs", "@angular/forms": "https://cdn.jsdelivr.net/npm/@angular/forms@16.2.6/fesm2022/forms.mjs", "@angular/localize": "https://cdn.jsdelivr.net/npm/@angular/localize@16.2.6/fesm2022/localize.mjs", "@angular/platform-browser-dynamic": "https://cdn.jsdelivr.net/npm/@angular/platform-browser-dynamic@16.2.6/fesm2022/platform-browser-dynamic.mjs", }, // packages tells the System loader how to load when no filename and/or no extension packages: { "./src": { defaultExtension: 'ts' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);