TreeView Performance (Angular)

The TreeView control creates DOM elements for each node in the itemsSource array. This sample below shows the performance of the TreeView when binding to sources of different sizes.

Learn about Wijmo | TreeView API Reference

This example uses Angular.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjCore from '@grapecity/wijmo'; // import { Component, enableProdMode, NgModule, ViewChild } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { BrowserModule } from '@angular/platform-browser'; import { WjInputModule, WjComboBox } from '@grapecity/wijmo.angular2.input'; import { WjNavModule, WjTreeView } from '@grapecity/wijmo.angular2.nav'; // @Component({ selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { @ViewChild('cmbLevels', { static: true }) cmbLevels: WjComboBox; @ViewChild('cmbNodesPerLevel', { static: true }) cmbNodesPerLevel: WjComboBox; @ViewChild('theTree', { static: true }) theTree: WjTreeView; // levels = [1, 2, 3]; nodesPerLevel = [5, 10, 20, 40]; treeData: string[] = []; bindingMsg = ''; // constructor() { this.treeData = this.getTreeData(5, 2); } refresh() { var start = Date.now(); this.theTree.itemsSource = this.getTreeData(this.cmbNodesPerLevel.selectedValue, this.cmbLevels.selectedValue); this.theTree.loadTree(); // force immediate refresh this.bindingMsg = wjCore.format('Bound to <b>{cnt:no}</b> nodes in <b>{ms:n0}</b> ms.', { cnt: this.theTree.totalItemCount, ms: Date.now() - start }); } getTreeData(cnt: number, levels: number) { var nodes = []; for (var i = 0; i < cnt; i++) { nodes.push(this.getNode_(0, i, cnt, levels)) } return nodes; } private getNode_(level: number, id: number, cnt: number, levels: number) { // create node var node: any = { header: 'Node ' + (level + 1) + '.' + (id + 1), }; // create child nodes if (level < levels - 1) { node.items = []; for (var i = 0; i < cnt; i++) { node.items.push(this.getNode_(level + 1, i, cnt, levels)) } } return node; } } // @NgModule({ imports: [WjNavModule, WjInputModule, BrowserModule], declarations: [AppComponent], providers: [], bootstrap: [AppComponent] }) export class AppModule { } // enableProdMode(); // Bootstrap application with hash style navigation and global services. platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo TreeView Performance</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/dist/zone.min.js"></script> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.js"></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"> <div class="row"> <div class="col-xs-5"> <label for="cmbLevels"> Levels: </label> <wj-combo-box #cmbLevels [itemsSource]="levels" [selectedValue]="2"> </wj-combo-box> <br /> <label for="cmbLevels"> Nodes/Level: </label> <wj-combo-box #cmbNodesPerLevel [itemsSource]="nodesPerLevel" [selectedValue]="5"> </wj-combo-box> <br /> <label></label> <button class="btn btn-primary" id="bind" (click)="refresh()"> Bind Tree </button> <div id="bindingMsg" [innerHtml]="bindingMsg"></div> </div> <div class="col-xs-7"> <wj-tree-view #theTree [itemsSource]="treeData" [displayMemberPath]="'header'" [childItemsPath]="'items'"> </wj-tree-view> </div> </div> </div>
/* default trees on this sample */ .wj-treeview { height: 350px; font-size: 120%; margin-top: 8px; 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); } .wj-combobox { width: 120px; } label { width: 120px; text-align: right; margin-bottom: 12px; } body { margin-bottom: 24pt; }
(function (global) { System.config({ transpiler: 'ts', typescriptOptions: { tsconfig: true }, meta: { 'typescript': { "exports": "ts" }, '*.css': { loader: 'css' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { 'core-js': 'npm:core-js/client/shim.min.js', 'zone': 'npm:zone.js/dist/zone.min.js', //'reflect-metadata': 'npm:reflect-metadata/Reflect.js', 'rxjs': 'npm:rxjs/bundles/rxjs.umd.min.js', //'rxjs': 'npm:rxjs', //'rxjs/operators': 'npm:rxjs/operators', '@angular/core': 'npm:@angular/core/bundles/core.umd.min.js', '@angular/common': 'npm:@angular/common/bundles/common.umd.min.js', '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.min.js', '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.min.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.min.js', '@angular/http': 'npm:@angular/http/bundles/http.umd.min.js', '@angular/common/http': 'npm:@angular/common/bundles/common-http.umd.min.js', '@angular/router': 'npm:@angular/router/bundles/router.umd.min.js', '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.min.js', '@grapecity/wijmo': 'npm:@grapecity/wijmo/index.js', '@grapecity/wijmo.input': 'npm:@grapecity/wijmo.input/index.js', '@grapecity/wijmo.styles': 'npm:@grapecity/wijmo.styles', '@grapecity/wijmo.cultures': 'npm:@grapecity/wijmo.cultures', '@grapecity/wijmo.chart': 'npm:@grapecity/wijmo.chart/index.js', '@grapecity/wijmo.chart.analytics': 'npm:@grapecity/wijmo.chart.analytics/index.js', '@grapecity/wijmo.chart.animation': 'npm:@grapecity/wijmo.chart.animation/index.js', '@grapecity/wijmo.chart.annotation': 'npm:@grapecity/wijmo.chart.annotation/index.js', '@grapecity/wijmo.chart.finance': 'npm:@grapecity/wijmo.chart.finance/index.js', '@grapecity/wijmo.chart.finance.analytics': 'npm:@grapecity/wijmo.chart.finance.analytics/index.js', 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extension packages: { src: { defaultExtension: 'ts' }, rxjs: { defaultExtension: 'js' }, // 'rxjs': {main: 'index.js', defaultExtension: 'js' }, // 'rxjs/ajax': {main: 'index.js', defaultExtension: 'js' }, //'rxjs/operators': {main: 'index.js', defaultExtension: 'js' }, // 'rxjs/testing': {main: 'index.js', defaultExtension: 'js' }, // 'rxjs/webSocket': {main: 'index.js', defaultExtension: 'js' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);