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.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
Thank you for the feedback!
If you have technical questions, please create a support ticket in the DevExpress Support Center.
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: any;
}
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/localization.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@2.3.1/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@23.1.6/cjs',
'devextreme/bundles/dx.all': 'npm:devextreme@23.1.6/bundles/dx.all.js',
'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.6.2/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.2',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.49',
'devextreme-angular': 'npm:devextreme-angular@23.1.6',
'@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@23.1.6/*/package.json',
'npm:devextreme-angular@23.1.6/ui/*/package.json',
'npm:devextreme-angular@23.1.6/package.json',
'npm:devexpress-diagram@2.2.2/package.json',
'npm:devexpress-gantt@4.1.49/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/23.1.5/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>