Discrete scale

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In this demo, a discrete scale is used to select a range within a set of categories.

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Angular

<div id="range-selector-demo"> <dx-range-selector title="Copper Production in 2013" [dataSource]="dataSource" (onValueChanged)="onValueChanged($event)"> <dxo-size [height]="200"></dxo-size> <dxo-chart> <dxi-series valueField="copper" name="Copper"></dxi-series> <dxo-common-series-settings type="bar" argumentField="country"> </dxo-common-series-settings> </dxo-chart> </dx-range-selector> <h2>Total: <span>{{totalResult | number}}</span> tons</h2> </div>

import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxRangeSelectorModule } from 'devextreme-angular'; import { Service, ProductionData } from './app.service'; if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', providers: [Service], templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'] }) export class AppComponent { dataSource: ProductionData[]; totalResult = 12809000; constructor(service: Service) { this.dataSource = service.getData(); } onValueChanged(e) { let data = this.dataSource, total = 0, startIndex, 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(function(item){ total += item.copper; }); } else { total = data[startIndex].copper; } this.totalResult = total; } } @NgModule({ imports: [ BrowserModule, DxRangeSelectorModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);

/deep/ #range-selector-demo { height: 440px; width: 100%; text-align: center; }

import { Injectable } from '@angular/core'; export class ProductionData { country: string; copper: number;} let 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; } }

// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular 2 and DevExtreme here: // https://github.com/DevExpress/devextreme-angular/blob/master/README.md System.config({ transpiler: 'ts', typescriptOptions: { module: "commonjs", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" } }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'ts': 'npm:plugin-typescript@7.0.6/lib/plugin.js', 'typescript': 'npm:typescript@2.2.2/lib/typescript.js', '@angular/core': 'npm:@angular/core@4.1.0/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@4.1.0/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@4.1.0/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@4.1.0/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@4.1.0/bundles/platform-browser-dynamic.umd.js', '@angular/http': 'npm:@angular/http@4.1.0/bundles/http.umd.js', '@angular/router': 'npm:@angular/router@4.1.0/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@4.1.0/bundles/forms.umd.js', 'rxjs': 'npm:rxjs@5.3.1', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'devextreme': 'npm:devextreme@17.1', 'jquery': 'npm:jquery@3.1.1/dist/jquery.min.js', 'devextreme-angular': 'npm:devextreme-angular@17.1' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme-angular': { main: 'index.js', defaultExtension: 'js' } } });

<!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/17.1.4/css/dx.spa.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.1.4/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/17.1.4/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@0.6.25/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.19.31/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>

Discrete scale

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