Editing Events

The FlexGrid has several events related to editing. This example shows how you can use two of them:

  • beginningEdit: Prevent editing overdue items by setting the cancel parameter to true.
  • cellEditEnding: Prevent entering negative amounts for the 'sales' and 'expenses' columns.
import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjGrid from '@grapecity/wijmo.grid'; import * as wjCore from '@grapecity/wijmo'; import '@grapecity/wijmo.input'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // // create some random data var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','); var data = []; for (var i = 0; i < countries.length; i++) { data.push({ id: i, country: countries[i], sales: Math.random() * 10000, expenses: Math.random() * 5000, overdue: (i + 1) % 4 == 0 }); } // // show the data in a grid var theGrid = new wjGrid.FlexGrid('#theGrid', { itemsSource: data, columns: [ { binding: 'id', header: 'ID', width: 50, isReadOnly: true }, { binding: 'country', header: 'Country', isRequired: true, dataMap: countries }, { binding: 'sales', header: 'Sales', format: 'n2' }, { binding: 'expenses', header: 'Expenses', format: 'n2' }, { binding: 'overdue', header: 'Overdue' } ], beginningEdit: function (s, e) { showMessage('&nbsp;'); var col = s.columns[e.col]; if (col.binding != 'overdue') { var item = s.rows[e.row].dataItem; if (item.overdue) { // prevent editing overdue items e.cancel = true; showMessage('Overdue items cannot be edited'); } } }, cellEditEnding: function (s, e) { showMessage('&nbsp;'); var col = s.columns[e.col]; if (col.binding == 'sales' || col.binding == 'expenses') { var value = wjCore.changeType(s.activeEditor.value, wjCore.DataType.Number, col.format); if (!wjCore.isNumber(value) || value < 0) { // prevent negative sales/expenses e.cancel = true; showMessage('Please enter a positive amount'); } } } }); // // show log message var edtMsg = document.getElementById('edit-msg'); function showMessage(msg) { edtMsg.innerHTML = msg; } }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexGrid Editing Events</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="edit-msg"> &nbsp; </div> <div id="theGrid"> </div> </div> </body> </html>
.wj-flexgrid { max-height: 200px; margin-bottom: 12px; } #edit-msg { font-style: italic; text-align: center; margin-bottom: 10px; opacity: .5; } body { margin-bottom: 24px; }
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