Angular Range Selector - Discrete scale

import { bootstrapApplication } from '@angular/platform-browser'; import { Component, enableProdMode, provideZoneChangeDetection } from '@angular/core'; import { DecimalPipe } from '@angular/common'; import { DxRangeSelectorModule, DxRangeSelectorTypes } from 'devextreme-angular/ui/range-selector'; import { Service, ProductionData } from './app.service'; if (!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', providers: [Service], templateUrl: './app.component.html', styleUrls: ['./app.component.css'], imports: [ DxRangeSelectorModule, DecimalPipe, ], }) export class AppComponent { dataSource: ProductionData[]; totalResult = 12809000; constructor(service: Service) { this.dataSource = service.getData(); } onValueChanged(e: DxRangeSelectorTypes.ValueChangedEvent) { const data = this.dataSource; let total = 0; let startIndex; let endIndex; data.forEach((item, index) => { if (item.country === e.value[0]) { startIndex = index; } else if (item.country === e.value[1]) { endIndex = index; } }); if (endIndex) { data .slice(startIndex, endIndex + 1) .forEach((item) => { total += item.copper; }); } else { total = data[startIndex].copper; } this.totalResult = total; } } bootstrapApplication(AppComponent, { providers: [ provideZoneChangeDetection({ eventCoalescing: true, runCoalescing: true }), ], });

::ng-deep #range-selector-demo { text-align: center; } ::ng-deep #range-selector { margin-bottom: 20px; height: 200px; }

import { Injectable } from '@angular/core'; export class ProductionData { country: string; copper: number; } const data: ProductionData[] = [ { country: 'Chile', copper: 5700000 }, { country: 'United States', copper: 1220000 }, { country: 'Peru', copper: 1300000 }, { country: 'China', copper: 1650000 }, { country: 'Australia', copper: 990000 }, { country: 'Russia', copper: 930000 }, { country: 'DR Congo', copper: 900000 }, { country: 'Finland', copper: 119000 }, ]; @Injectable() export class Service { getData(): ProductionData[] { return data; } }

<!DOCTYPE html> <html lang="en"> <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=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/26.1.5/css/dx.light.css" /> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> <script src="https://cdn.jsdelivr.net/npm/zone.js@0.16.2/bundles/zone.umd.js"></script> <script src="./bundle.js" type="module"></script> </body> </html>