Node Selection and Customization

import { NgModule, Component, Pipe, PipeTransform, enableProdMode, ViewChild } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxTreeViewModule, DxListModule, DxTemplateModule, DxCheckBoxModule, DxSelectBoxModule, DxTreeViewComponent } from 'devextreme-angular'; import { Service, Employee } from './app.service'; @Pipe({ name: 'title' }) export class TitlePipe implements PipeTransform { transform(item: any): string { return item.text + (item.price ? ' ($' + item.price + ')' : ''); } } if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], providers: [Service], preserveWhitespaces: true }) export class AppComponent { @ViewChild(DxTreeViewComponent, { static: false }) treeView: DxTreeViewComponent; employees: Employee[]; selectedEmployees: Employee[] = []; showCheckBoxesModes: string[] = ["normal", "selectAll", "none"]; showCheckBoxesMode: string = this.showCheckBoxesModes[0]; selectionModes: string[] = ["multiple", "single"]; selectionMode: string = this.selectionModes[0]; selectNodesRecursive: boolean = true; selectByClick: boolean = false; isRecursiveDisabled: boolean = false; isSelectionModeDisabled: boolean = false; constructor(service: Service) { this.employees = service.getEmployees(); } treeViewSelectionChanged(e) { this.syncSelection(e.component); } treeViewContentReady(e) { this.syncSelection(e.component); } syncSelection(treeView) { const selectedEmployees = treeView.getSelectedNodes() .map(node => node.itemData); this.selectedEmployees = selectedEmployees; } showCheckBoxesModeValueChanged(e) { this.showCheckBoxesMode = e.value; this.isSelectionModeDisabled = e.value === 'selectAll'; if(e.value === 'selectAll') { this.selectionMode = "multiple"; this.isRecursiveDisabled = false; } } selectionModeValueChanged(e) { this.selectionMode = e.value; this.isRecursiveDisabled = e.value === 'single'; if(e.value === 'single') { this.selectNodesRecursive = false; this.treeView.instance.unselectAll(); } } } @NgModule({ imports: [ BrowserModule, DxTreeViewModule, DxListModule, DxTemplateModule, DxCheckBoxModule, DxSelectBoxModule ], declarations: [AppComponent, TitlePipe], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);

::ng-deep .form>h4 { margin-bottom: 20px; } ::ng-deep .form>div, ::ng-deep #treeview { display: inline-block; vertical-align: top; } ::ng-deep .selected-container { padding: 20px; margin-left: 20px; background-color: rgba(191, 191, 191, 0.15); font-size: 115%; font-weight: bold; } ::ng-deep #selected-employees { margin-top: 20px; } ::ng-deep .dx-list-item-content { padding-left: 0; } ::ng-deep .options { padding: 20px; background-color: rgba(191, 191, 191, 0.15); margin-top: 20px; } ::ng-deep .caption { font-size: 18px; font-weight: 500; } ::ng-deep .option { width: 24%; display: inline-block; margin-top: 10px; margin-right: 5px; box-sizing: border-box; } ::ng-deep .recursive-option { padding-left: 10px; } ::ng-deep .option:last-of-type { margin-right: 0px; }

import { Injectable } from '@angular/core'; export class Employee { id: number; fullName: string; prefix: string; position: string; expanded?: boolean; selected?: boolean; items?: Employee[]; } var employees: Employee[] = [{ id: 1, fullName: "John Heart", prefix: "Dr.", position: "CEO", expanded: true, items: [{ id: 2, fullName: "Samantha Bright", prefix: "Dr.", position: "COO", expanded: true, items: [{ id: 3, fullName: "Kevin Carter", prefix: "Mr.", position: "Shipping Manager", }, { id: 14, fullName: "Victor Norris", prefix: "Mr.", selected: true, position: "Shipping Assistant" }] }, { id: 4, fullName: "Brett Wade", prefix: "Mr.", position: "IT Manager", expanded: true, items: [{ id: 5, fullName: "Amelia Harper", prefix: "Mrs.", position: "Network Admin" }, { id: 6, fullName: "Wally Hobbs", prefix: "Mr.", position: "Programmer" }, { id: 7, fullName: "Brad Jameson", prefix: "Mr.", position: "Programmer" }, { id: 8, fullName: "Violet Bailey", prefix: "Ms.", position: "Jr Graphic Designer", }] }, { id: 9, fullName: "Barb Banks", prefix: "Mrs.", position: "Support Manager", expanded: true, items: [{ id: 10, fullName: "Kelly Rodriguez", prefix: "Ms.", position: "Support Assistant" }, { id: 11, fullName: "James Anderson", prefix: "Mr.", position: "Support Assistant" }] }] }]; @Injectable() export class Service { getEmployees(): Employee[] { return employees; } }

// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here: // https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/ System.config({ transpiler: 'ts', typescriptOptions: { module: "system", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" }, 'devextreme/localization.js': { "esModule": true } }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@3.5.3/lib/typescript.js', '@angular': 'npm:@angular', 'tslib': 'npm:tslib@2.1.0/tslib.js', 'rxjs': 'npm:rxjs@6.4.0', 'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.26.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@20.2.6', 'jszip': 'npm:jszip@3.6.0/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@0.10.3/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.0.18', 'devexpress-gantt': 'npm:devexpress-gantt@2.0.24', 'devextreme-angular': 'npm:devextreme-angular@20.2.6', 'preact': 'npm:preact@10.5.13/dist/preact.js', 'preact/hooks': 'npm:preact@10.5.13/hooks/dist/hooks.js' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme/events/utils': { main: 'index' }, 'devextreme/events': { main: 'index' }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js' } }, packageConfigPaths: [ "npm:@angular/*/package.json", "npm:@angular/common/*/package.json", "npm:rxjs/package.json", "npm:rxjs/operators/package.json", "npm:devextreme-angular/*/package.json", "npm:devextreme-angular/ui/*/package.json", "npm:devextreme-angular/package.json", "npm:devexpress-diagram/package.json", "npm:devexpress-gantt/package.json", ] });

<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.6/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.6/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/zone.js@0.10.2/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script src="config.js"></script> <script> System.import('app').catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>