Popups: Delete Rows with Ctrl+Delete (Angular)

(Or Fn+Delete on Mac keyboards)

You can handle keyboard events in the FlexGrid control by adding HTML event listeners to the grid's hostElement.

For example, the grid below listens to the 'keydown' event. If you press Ctrl+Delete, it shows a prompt and deletes the current row. Note that:

  1. The event listener is added with the capture parameter set to true, so it is called before the grid gets it, and
  2. The event handler calls the event's preventDefault method, so the grid does not handle the Delete key as it normally would.

Press Ctrl+Delete to remove the current row:

Learn about Input Controls | Popup API Reference

This example uses Angular.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; // import * as wijmo from '@mescius/wijmo'; import * as input from '@mescius/wijmo.input'; import * as grid from '@mescius/wijmo.grid'; // import '@angular/compiler'; import { Component, enableProdMode, ViewChild, Inject, ɵresolveComponentResources } from '@angular/core'; import { BrowserModule, bootstrapApplication } from '@angular/platform-browser'; import { WjInputModule } from '@mescius/wijmo.angular2.input'; import { WjGridModule } from '@mescius/wijmo.angular2.grid'; import { DataService } from './app.data'; // @Component({ standalone: true, providers: [DataService], imports: [WjInputModule, WjGridModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html', }) export class AppComponent { @ViewChild('thePopup', { static: true }) thePopup: input.Popup; data: any; // constructor(@Inject(DataService) private dataService: DataService) { this.data = dataService.getData(); } // initGrid(grid: grid.FlexGrid) { grid.hostElement.addEventListener( 'keydown', (e) => { let view = grid.collectionView; // // looking for ctrl+Delete if (e.ctrlKey && e.keyCode == wijmo.Key.Delete && view.currentItem) { // prevent the grid from getting the key e.preventDefault(); // // confirm row deletion this.thePopup.show(true, (sender: input.Popup) => { // delete the row if (sender.dialogResult == 'wj-hide-ok') { (<wijmo.CollectionView>view).remove(view.currentItem); } // // return focus to the grid grid.focus(); }); } }, true, ); } } // // 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 Popup (Delete Rows with Ctrl+Delete)</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>
<main class="container-fluid"> <wj-flex-grid #theGrid [itemsSource]="data" [allowAddNew]="true" (initialized)="initGrid(theGrid)"></wj-flex-grid> <wj-popup #thePopup> <div class="wj-dialog-header"> Deleting Row </div> <div class="wj-dialog-body" tabindex="-1"> Do you really want to delete this row? </div> <div class="wj-dialog-footer"> <button class="btn btn-primary wj-hide-ok">Yes</button> <button class="btn btn-default wj-hide">No</button> </div> </wj-popup> </main>
import { Injectable } from '@angular/core'; // @Injectable() export class DataService { getData() { let countries = ['US', 'Canada', 'Mexico', 'Germany', 'UK', 'France', 'Italy', 'Greece', 'Holland', 'Japan', 'Korea', 'China'], data = []; // for (let i = 0; i < 1000; i++) { data.push({ id: i, country: countries[i % countries.length], sales: Math.random() * 10000, expenses: Math.random() * 5000, active: i % 3 == 0 }); } // return data; } }
.wj-flexgrid { height: 300px; margin: 10px 0; } body { margin-bottom: 24pt; }
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'@angular/router': 'npm:@angular/router/fesm2022/router.mjs', '@angular/forms': 'npm:@angular/forms/fesm2022/forms.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);