Accessibility Extender (Angular)

The FlexGrid control has extensive built-in accessibility support. But there are situations where you may want to extend that and provide additional support that is specific to your application or user base. This sample has an AccessibilityExtender class that shows how to add your own app-specific accessibility features.

Learn about FlexGrid | FlexGrid API Reference

This example uses Angular.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import '@angular/compiler'; import { Component, enableProdMode, NgModule, ViewChild } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { BrowserModule } from '@angular/platform-browser'; import { WjGridModule } from '@grapecity/wijmo.angular2.grid'; import * as wjcGrid from '@grapecity/wijmo.grid'; import { AccessibilityExtender } from './app.accessibility-extender'; @Component({ selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { data: any[]; private _acX: AccessibilityExtender; private _toSearch: any; // DataSvc will be passed by derived classes constructor() { this.data = this._getData(100); } @ViewChild('flex', { static: true } as any) flex: wjcGrid.FlexGrid; ngAfterViewInit() { this._acX = new AccessibilityExtender(this.flex); document.querySelector('#filter').addEventListener('input', (e: any) => { clearTimeout(this._toSearch); this._toSearch = setTimeout(() => { let search = (<HTMLInputElement>e.target).value, rx = new RegExp(search, 'i'); this.flex.collectionView.filter = (item: any) => { return !search || JSON.stringify(item).match(rx) != null; } // notify users that a filter was applied setTimeout(() => { let msg = search ? 'grid filtered on ' + search : 'filter removed'; msg += ': ' + this.flex.rows.length + ' items displayed'; this._acX.alert(msg); }, 200); }, 900); }); } initializeGrid(flex: wjcGrid.FlexGrid) { // notify users when columns are sorted flex.sortedColumn.addHandler((s: wjcGrid.FlexGrid, e: wjcGrid.CellRangeEventArgs) => { let col = s.columns[e.col]; this._acX.alert('column ' + col.header + ' sorted in ' + (col.currentSort == '+' ? 'ascending' : 'descending') + ' order'); }); } private _getData(count: number) { // create some random data let countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), products = 'Tents,Boots,Knives,Bows,Arrows,Sleeping Bags,Lamps'.split(','), data = []; for (let i = 0; i < count; i++) { data.push({ id: i, country: countries[i % countries.length], product: products[i % products.length], active: i % 5 != 0, downloads: Math.round(Math.random() * 200000), sales: Math.random() * 100000, expenses: Math.random() * 50000 }); } return data; } } @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 FlexGrid Accessibility Extender</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"> <div class="input-group"> <div class="input-group-addon"> <span class="glyphicon glyphicon-search"></span> </div> <input type="text" class="form-control" id="filter" placeholder="filter"> </div> <!-- the grid --> <wj-flex-grid #flex [alternatingRowStep]="0" [selectionMode]="'ListBox'" [(itemsSource)]="data" (initialized)="initializeGrid(flex)"> </wj-flex-grid> </div>
.wj-flexgrid { height: 300px; margin: 6px 0; } .wj-cell { border-right: none; padding: 8px 3px; }
(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/@grapecity/*/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', '@grapecity/wijmo': 'npm:@grapecity/wijmo/index.js', '@grapecity/wijmo.input': 'npm:@grapecity/wijmo.input/index.js', '@grapecity/wijmo.styles': 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