Node Checkboxes

The TreeNodes can be displayed with a Checkbox by setting the TreeView.showCheckboxes property to true. This is and the TreeView will add checkboxes to each node. The checkedItems and checkItemsChanged events are raised when items are checked or unchecked.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjNav from '@grapecity/wijmo.nav'; import { getData } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { let tree = new wjNav.TreeView('#theTree', { itemsSource: getData(), displayMemberPath: 'header', childItemsPath: 'items', showCheckboxes: true, // // show checked items below the tree checkedItemsChanged: (sender) => { let items = sender.checkedItems, msg = ''; // if (items.length) { msg = '<p><b>Checked Items:</b></p><ol>\r\n'; for (let i = 0; i < items.length; i++) { msg += '<li>' + items[i].header + '</li>\r\n'; } msg += '</ol>'; } // document.getElementById('tvChkStatus').innerHTML = msg; } }); // let checkedItems = []; // // handle buttons document.getElementById('btnCheckAll').addEventListener('click', () => { tree.checkAllItems(true); }); // document.getElementById('btnUncheckAll').addEventListener('click', () => { tree.checkAllItems(false); }); // document.getElementById('btnSaveState').addEventListener('click', () => { checkedItems = tree.checkedItems || []; }); // document.getElementById('btnRestoreState').addEventListener('click', () => { tree.checkedItems = checkedItems; }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo TreeView Checkbox Nodes</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="theTree"></div> <button id="btnCheckAll" class="btn btn-default"> Check All </button> <button id="btnUncheckAll" class="btn btn-default"> Uncheck All </button> &nbsp;&nbsp;&nbsp;&nbsp; <button id="btnSaveState" class="btn btn-default"> Save State </button> <button id="btnRestoreState" class="btn btn-default"> Restore State </button> <div id="tvChkStatus"></div> </div> </body> </html>
export function getData() { return [ { header: 'Electronics', items: [ { header: 'Trimmers/Shavers' }, { header: 'Tablets' }, { header: 'Phones', items: [ { header: 'Apple' }, { header: 'Motorola', newItem: true }, { header: 'Nokia' }, { header: 'Samsung' } ] }, { header: 'Speakers', newItem: true }, { header: 'Monitors' } ] }, { header: 'Toys', items: [ { header: 'Shopkins' }, { header: 'Train Sets' }, { header: 'Science Kit', newItem: true }, { header: 'Play-Doh' }, { header: 'Crayola' } ] }, { header: 'Home', items: [ { header: 'Coffee Maker' }, { header: 'Breadmaker', newItem: true }, { header: 'Solar Panel', newItem: true }, { header: 'Work Table' }, { header: 'Propane Grill' } ] } ]; }
.wj-treeview { display:block; height: 350px; font-size: 120%; margin-bottom: 8px; padding: 6px; background: #f0f0f0; box-shadow: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23); } body { margin-bottom: 24pt; }
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