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Update Linear Gauge Data at Runtime

Documentation

This demo illustrates data binding in the LinearGauge component. The bound data changes when a user selects a new location in the City drop-down menu.

Backend API
<div class="long-title"><h3>Weather Indicators</h3></div> <div id="gauge-demo"> <dx-linear-gauge class="gauge-element" [value]="weatherData.temperature"> <dxo-title text="Temperature (°C)"> <dxo-font [size]="16"></dxo-font> </dxo-title> <dxo-geometry orientation="vertical"></dxo-geometry> <dxo-scale [startValue]="-40" [endValue]="40" [tickInterval]="40" ></dxo-scale> <dxo-range-container backgroundColor="none"> <dxi-range [startValue]="-40" [endValue]="0" color="#679EC5"></dxi-range> <dxi-range [startValue]="0" [endValue]="40"></dxi-range> </dxo-range-container> </dx-linear-gauge> <dx-linear-gauge class="gauge-element" [value]="weatherData.humidity"> <dxo-value-indicator type="rhombus" color="#A4DDED"></dxo-value-indicator> <dxo-title text="Humidity (%)"> <dxo-font [size]="16"></dxo-font> </dxo-title> <dxo-geometry orientation="vertical"></dxo-geometry> <dxo-scale [startValue]="0" [endValue]="100" [tickInterval]="10" ></dxo-scale> <dxo-range-container backgroundColor="#CACACA"></dxo-range-container> </dx-linear-gauge> <dx-linear-gauge class="gauge-element" [value]="weatherData.pressure"> <dxo-value-indicator type="circle" color="#E3A857"></dxo-value-indicator> <dxo-title text="Barometric Pressure (mb)"> <dxo-font [size]="16"></dxo-font> </dxo-title> <dxo-geometry orientation="vertical"></dxo-geometry> <dxo-scale [startValue]="900" [endValue]="1100" [customTicks]="[900, 1000, 1020, 1100]" > <dxo-label> <dxo-format type="decimal"></dxo-format> </dxo-label> </dxo-scale> <dxo-range-container backgroundColor="none"> <dxi-range [startValue]="900" [endValue]="1000" color="#679EC5" ></dxi-range> <dxi-range [startValue]="1000" [endValue]="1020" color="#A6C567" ></dxi-range> <dxi-range [startValue]="1020" [endValue]="1100" color="#E18E92" ></dxi-range> </dxo-range-container> </dx-linear-gauge> </div> <dx-select-box [dataSource]="cities" displayExpr="name" [inputAttr]="{ 'aria-label': 'City' }" valueExpr="data" [(value)]="weatherData" > </dx-select-box>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule, BrowserTransferStateModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxLinearGaugeModule, DxSelectBoxModule } from 'devextreme-angular'; import { City, Service } from './app.service'; 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 { cities: City[]; weatherData: City; constructor(service: Service) { this.cities = service.getCities(); this.weatherData = this.cities[0].data; } } @NgModule({ imports: [ BrowserModule, BrowserTransferStateModule, DxLinearGaugeModule, DxSelectBoxModule, ], declarations: [AppComponent], bootstrap: [AppComponent], }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #gauge-demo { width: 90%; margin: 0 auto; } ::ng-deep #gauge-demo .gauge-element { height: 400px; width: 33%; float: left; } .dx-selectbox { margin: 10px auto 0; width: 200px; } ::ng-deep #gauge-demo::after { content: "."; display: block; clear: both; visibility: hidden; line-height: 0; height: 0; } .long-title h3 { font-weight: 200; font-size: 28px; text-align: center; margin-bottom: 20px; }
import { Injectable, } from '@angular/core'; export class City { name: string; id: string; data: Record<string, number>; } const cities: City[] = [{ name: 'London', id: '1', data: { temperature: 10, humidity: 81, pressure: 1002.1, }, }, { name: 'Berlin', id: '2', data: { temperature: 14, humidity: 58, pressure: 1008.5, }, }, { name: 'New York', id: '3', data: { temperature: 3, humidity: 89, pressure: 1016.2, }, }, { name: 'Moscow', id: '4', data: { temperature: 2, humidity: 51, pressure: 1016.5, }, }, { name: 'Bangkok', id: '5', data: { temperature: 37, humidity: 39, pressure: 1007.0, }, }]; @Injectable() export class Service { getCities(): City[] { return cities; } }
// 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/ window.exports = window.exports || {}; window.config = { transpiler: 'ts', typescriptOptions: { module: 'system', emitDecoratorMetadata: true, experimentalDecorators: true, }, meta: { 'typescript': { 'exports': 'ts', }, 'devextreme/time_zone_utils.js': { 'esModule': true, }, 'devextreme/localization.js': { 'esModule': true, }, 'devextreme/viz/palette.js': { 'esModule': true, }, }, paths: { 'npm:': 'https://unpkg.com/', }, map: { 'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js', 'typescript': 'npm:typescript@4.2.4/lib/typescript.js', '@angular/core': 'npm:@angular/core@12.2.17', '@angular/platform-browser': 'npm:@angular/platform-browser@12.2.17', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@12.2.17', '@angular/forms': 'npm:@angular/forms@12.2.17', '@angular/common': 'npm:@angular/common@12.2.17', '@angular/compiler': 'npm:@angular/compiler@12.2.17', 'tslib': 'npm:tslib@2.6.2/tslib.js', 'rxjs': 'npm:rxjs@7.5.3/dist/bundles/rxjs.umd.js', 'rxjs/operators': 'npm:rxjs@7.5.3/dist/cjs/operators/index.js', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@23.2.5/cjs', 'devextreme/bundles/dx.all': 'npm:devextreme@23.2.5/bundles/dx.all.js', 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.6.4/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.5', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.51', 'devextreme-angular': 'npm:devextreme-angular@23.2.5', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.12', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js', // Prettier 'prettier/standalone': 'npm:prettier@2.8.4/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.4/parser-html.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', }, 'rxjs': { defaultExtension: 'js', }, 'rxjs/operators': { defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.12/inferno/package.json', 'npm:@angular/*/package.json', 'npm:@angular/common@12.2.17/*/package.json', 'npm:rxjs@7.5.3/package.json', 'npm:rxjs@7.5.3/operators/package.json', 'npm:devextreme-angular@23.2.5/*/package.json', 'npm:devextreme-angular@23.2.5/ui/*/package.json', 'npm:devextreme-angular@23.2.5/package.json', 'npm:devexpress-diagram@2.2.5/package.json', 'npm:devexpress-gantt@4.1.51/package.json', ], }; System.config(window.config);
<!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/23.2.5/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script> <script src="https://unpkg.com/zone.js@0.12.0/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.13/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>