Popups: Delete Rows with Ctrl+Delete

(Or Fn+Delete on Mac keyboards)

You can handle keyboard events in the FlexGrid 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:

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as grid from '@grapecity/wijmo.grid'; import * as input from '@grapecity/wijmo.input'; import * as wijmo from '@grapecity/wijmo'; import { getData } from './data'; document.readyState === 'complete' ? init() : window.onload = init; function init() { // create the grid let theGrid = new grid.FlexGrid('#theGrid', { itemsSource: getData(), allowAddNew: true }); // use ctrl+Delete to delete the current row let theDialog = new input.Popup('#theDialog'); theGrid.hostElement.addEventListener('keydown', e => { let view = theGrid.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 theDialog.show(true, (sender) => { // delete the row if (sender.dialogResult == 'wj-hide-ok') { view.remove(view.currentItem); } // return focus to the grid theGrid.focus(); }); } }, true); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Popup (Delete Rows with Ctrl+Delete)</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class="container-fluid"> <div id="theGrid"></div> <div id="theDialog" style="display:none"> <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> </div> </div> </body> </html>
// grab the event before the grid // // generate some random data export function 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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