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Charts

Customize Points and Labels

Documentation
This demo shows how you can customize individual points and labels in the Chart.
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<dx-chart id="chart" [dataSource]="temperaturesData" title="Daily Temperature in May" [customizePoint]="customizePoint" [customizeLabel]="customizeLabel" [valueAxis]="{ min: 40, maxValueMargin: 0.1, label: { customizeText: customizeText }, constantLines: [{ label: { text: 'Low Average' }, width: 2, value: lowAverage, color: '#8c8cff', dashStyle: 'dash' }, { label: { text: 'High Average' }, width: 2, value: highAverage, color: '#ff7c7c', dashStyle: 'dash' }] }"> <dxi-series></dxi-series> <dxo-common-series-settings argumentField="day" valueField="value" type="bar" color="#e7d19a"> </dxo-common-series-settings> <dxo-legend [visible]="false"></dxo-legend> <dxo-export [enabled]="true"></dxo-export> </dx-chart>
import { NgModule, Component } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxChartModule } from 'devextreme-angular'; import { Service, Temperature } from './app.service'; @Component({ selector: 'demo-app', providers: [Service], templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'] }) export class AppComponent { highAverage = 77; lowAverage = 58; temperaturesData: Temperature[]; constructor(service: Service) { this.temperaturesData = service.getTemperaturesData(); } customizePoint = (arg: any) => { if(arg.value > this.highAverage) { return { color: "#ff7c7c", hoverStyle: { color: "#ff7c7c" } }; } else if(arg.value < this.lowAverage) { return { color: "#8c8cff", hoverStyle: { color: "#8c8cff" } }; } } customizeLabel = (arg: any) => { if (arg.value > this.highAverage) { return { visible: true, backgroundColor: "#ff7c7c", customizeText: function (e: any) { return e.valueText + "&#176F"; } }; } } customizeText = (arg: any) => { return arg.valueText + "&#176F"; } } @NgModule({ imports: [ BrowserModule, DxChartModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
/deep/ #chart { height: 440px; width: 100%; }
import { Injectable } from '@angular/core'; export class Temperature { day: string; value: number; } let temperaturesData : Temperature[] = [{ day: '1', value: 57 }, { day: '2', value: 58 }, { day: '3', value: 57 }, { day: '4', value: 59 }, { day: '5', value: 63 }, { day: '6', value: 63 }, { day: '7', value: 63 }, { day: '8', value: 64 }, { day: '9', value: 64 }, { day: '10', value: 64 }, { day: '11', value: 69 }, { day: '12', value: 72 }, { day: '13', value: 75 }, { day: '14', value: 78 }, { day: '15', value: 76 }, { day: '16', value: 70 }, { day: '17', value: 65 }, { day: '18', value: 65 }, { day: '19', value: 68 }, { day: '20', value: 70 }, { day: '21', value: 73 }, { day: '22', value: 73 }, { day: '23', value: 75 }, { day: '24', value: 78 }, { day: '25', value: 76 }, { day: '26', value: 76 }, { day: '27', value: 80 }, { day: '28', value: 76 }, { day: '29', value: 75 }, { day: '30', value: 75 }, { day: '31', value: 74 }]; @Injectable() export class Service { getTemperaturesData(): Temperature[] { return temperaturesData; } }
// 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@4.0.10/lib/plugin.js', 'typescript': 'npm:typescript@2.0.6/lib/typescript.js', '@angular/core': 'npm:@angular/core@2.4.3/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@2.4.3/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@2.4.3/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@2.4.3/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@2.4.3/bundles/platform-browser-dynamic.umd.js', '@angular/http': 'npm:@angular/http@2.4.3/bundles/http.umd.js', '@angular/router': 'npm:@angular/router@3.4.3/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@2.4.3/bundles/forms.umd.js', 'rxjs': 'npm:rxjs@5.0.3', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'devextreme': 'npm:devextreme@16.2', 'jquery': 'npm:jquery@3.1.1/dist/jquery.min.js', 'devextreme-angular': 'npm:devextreme-angular@16.2' }, 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/16.2.6/css/dx.spa.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/16.2.6/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/16.2.6/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@0.6.25/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>