Demos
Nav(Angular)
TreeView
Nodes
Checkboxes

Node Checkboxes (Angular)

The TreeNodes can be displayed with a Checkbox by setting the TreeView.showCheckboxes property to true.

This setting causes the TreeView to add checkboxes to each node. When users check or uncheck nodes, the TreeView raises the checkedItemsChanged event.

You can use the checkedItems property to get or set the list of checked items. The list of checked items includes only items that are checked and have no child nodes (the checked state of parent nodes is determined by the checked state of their children).

Learn about Wijmo | TreeView API Reference

This example uses Angular.

JavaScript
Angular
Vue
React
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app.component.ts
index.html
app.component.html
app.data.ts
styles.css
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import 'bootstrap.css';
import '@mescius/wijmo.styles/wijmo.css';
import './styles.css';

import '@angular/compiler';
import { Component, Inject, enableProdMode, ViewChild, ɵresolveComponentResources } from '@angular/core';

import { BrowserModule, bootstrapApplication } from '@angular/platform-browser';
import { WjNavModule, WjTreeView } from '@mescius/wijmo.angular2.nav';
import { DataService, TTreeItem } from './app.data';

//
@Component({
  standalone: true,
  providers: [DataService],
  imports: [WjNavModule, BrowserModule],
  selector: 'app-component',
  templateUrl: 'src/app.component.html',
})
export class AppComponent {
  @ViewChild('theTree', { static: true }) theTree: WjTreeView;
  data: TTreeItem[];
  checkedItems: any[];
  tvChkStatus: string = '';
  //
  constructor(@Inject(DataService) private dataService: DataService) {
    this.data = dataService.getData();
    this.checkedItems = [];
  }
  //
  onCheckedItemsChanged() {
    let items = this.theTree.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>';
    }
    //
    this.tvChkStatus = msg;
  }
  //
  onCheckAllClick() {
    this.theTree.checkAllItems(true);
  }
  //
  onUncheckAllClick() {
    this.theTree.checkAllItems(false);
  }
  //
  onSaveStateClick() {
    this.checkedItems = this.theTree.checkedItems || [];
  }
  //
  onRestoreStateClick() {
    this.theTree.checkedItems = this.checkedItems;
  }
}
//

//
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));
});
import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; import '@angular/compiler'; import { Component, Inject, enableProdMode, ViewChild, ɵresolveComponentResources } from '@angular/core'; import { BrowserModule, bootstrapApplication } from '@angular/platform-browser'; import { WjNavModule, WjTreeView } from '@mescius/wijmo.angular2.nav'; import { DataService, TTreeItem } from './app.data'; // @Component({ standalone: true, providers: [DataService], imports: [WjNavModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html', }) export class AppComponent { @ViewChild('theTree', { static: true }) theTree: WjTreeView; data: TTreeItem[]; checkedItems: any[]; tvChkStatus: string = ''; // constructor(@Inject(DataService) private dataService: DataService) { this.data = dataService.getData(); this.checkedItems = []; } // onCheckedItemsChanged() { let items = this.theTree.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>'; } // this.tvChkStatus = msg; } // onCheckAllClick() { this.theTree.checkAllItems(true); } // onUncheckAllClick() { this.theTree.checkAllItems(false); } // onSaveStateClick() { this.checkedItems = this.theTree.checkedItems || []; } // onRestoreStateClick() { this.theTree.checkedItems = this.checkedItems; } } // // 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 TreeView Checkbox Nodes</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>
<div class="container-fluid"> <wj-tree-view #theTree [itemsSource]="data" [displayMemberPath]="'header'" [childItemsPath]="'items'" [showCheckboxes]=true (checkedItemsChanged)="onCheckedItemsChanged()"></wj-tree-view> <button id="btnCheckAll" class="btn btn-default" (click)="onCheckAllClick()"> Check All </button> <button id="btnUncheckAll" class="btn btn-default" (click)="onUncheckAllClick()"> Uncheck All </button> &nbsp;&nbsp;&nbsp;&nbsp; <button id="btnSaveState" class="btn btn-default" (click)="onSaveStateClick()"> Save State </button> <button id="btnRestoreState" class="btn btn-default" (click)="onRestoreStateClick()"> Restore State </button> <div id="tvChkStatus" [innerHtml]="tvChkStatus"></div> </div>
import { Injectable } from '@angular/core'; // export type TTreeItem = { header: string; items?: TTreeItem[] newItem?: boolean; } // @Injectable() export class DataService { getData(): TTreeItem[] { 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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'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);