Data Labels (Angular)

FlexChart's dataLabels property allows you to show labels next to each data point on the chart.

Learn about FlexChart | DataLabel Documentation | FlexChart API Reference

This example uses Angular.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; // import '@angular/compiler'; import { Component, Inject, enableProdMode, AfterViewInit, ViewChild, ɵresolveComponentResources } from '@angular/core'; import { BrowserModule, bootstrapApplication } from '@angular/platform-browser'; import { FormsModule } from '@angular/forms'; import { WjInputModule } from '@mescius/wijmo.angular2.input'; import { WjChartModule } from '@mescius/wijmo.angular2.chart'; import { DataService } from './app.data'; import { isArray } from '@mescius/wijmo'; import { ComboBox } from '@mescius/wijmo.input'; import { FlexChart, DataLabelRenderEventArgs, Palettes } from '@mescius/wijmo.chart'; // @Component({ standalone: true, providers: [DataService], imports: [WjInputModule, WjChartModule, FormsModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent implements AfterViewInit { data: any[]; comboData: any[]; palette: any; downloadsOnly: boolean; @ViewChild('theChart', { static: true }) theChart: FlexChart; // constructor(@Inject(DataService) private dataService: DataService) { this.data = dataService.getData(); this.comboData = dataService.getComboData(); this.palette = this.getRandomPalette(); this.downloadsOnly = false; } // ngAfterViewInit() { this.theChart.dataLabel.rendering.addHandler(function(_: any, e: DataLabelRenderEventArgs) { if (this.downloadsOnly && e.hitTestInfo.series.binding != '2016') { e.cancel = true; // labels only for the "downloads" series } }, this); } // textChanged(s: ComboBox) { this.theChart.dataLabel.position = <any>s.text; } // getRandomPalette() { let palettes = Object.keys(Palettes).filter(prop => isArray(Palettes[prop])); let rand = Math.floor(Math.random() * palettes.length); // return Palettes[palettes[rand]]; } // lbClick(cb: HTMLInputElement) { let dl = this.theChart.dataLabel; dl.connectingLine = dl.border = cb.checked; } // doClick(cb: HTMLInputElement) { this.theChart.invalidate(); } } // // enableProdMode(); // Resolve resources (templateUrl, styleUrls etc), After resolution all URLs have been converted into `template` strings. ɵresolveComponentResources(fetch).then(() => { // Bootstrap application bootstrapApplication(AppComponent).catch(err => console.error(err)); });
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexChart Data Labels</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- Polyfills --> <script src="node_modules/core-js/client/shim.min.js"></script> <script src="node_modules/zone.js/fesm2015/zone.min.js"></script> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> // workaround to load 'rxjs/operators' from the rxjs bundle System.import('rxjs').then(function (m) { System.set(SystemJS.resolveSync('rxjs/operators'), System.newModule(m.operators)); System.import('./src/app.component'); }); </script> </head> <body> <app-component></app-component> </body> </html>
<div class="container-fluid"> <div class="form-group"> <label for="labelPosition">Label Position: </label> <wj-combo-box #cb [itemsSource]="comboData" (textChanged)="textChanged(cb)" text="Top"></wj-combo-box><br /> <label for="linesAndBorders">Lines/Borders: </label> <input #lb id="linesAndBorders" type="checkbox" (click)="lbClick(lb)" /><br /> <label for="downloadsOnly">2016 Only: </label> <input #do id="downloadsOnly" type="checkbox" [(ngModel)]="downloadsOnly" (click)="doClick(do)" /> </div> <div class="form-group"> <wj-flex-chart #theChart [itemsSource]="data" bindingX="country" tooltipContent="" header="Country GDP" [palette]="palette" [options]="{ groupWidth : '90%' }"> <wj-flex-chart-series binding="2014" name="2014"></wj-flex-chart-series> <wj-flex-chart-series binding="2015" name="2015"></wj-flex-chart-series> <wj-flex-chart-series binding="2016" name="2016"></wj-flex-chart-series> <wj-flex-chart-data-label content="{value:n0,,}T" position="Top"></wj-flex-chart-data-label> </wj-flex-chart> </div> </div>
import { Injectable } from '@angular/core'; // @Injectable() export class DataService { // https://en.wikipedia.org/wiki/List_of_IMF_ranked_countries_by_GDP getData() { return [ { country: 'United States', '2014': 17348075, '2015': 18036650, '2016': 18624450 }, { country: 'China', '2014': 10356508, '2015': 11181556, '2016': 11232110 }, { country: 'Japan', '2014': 4602367, '2015': 4124211, '2016': 4936540 }, { country: 'Germany', '2014': 3874437, '2015': 3365293, '2016': 3479230 }, { country: 'United Kingdom', '2014': 2950039, '2015': 2858482, '2016': 2629190 }, { country: 'France', '2014': 2833687, '2015': 2420163, '2016': 2466470 }, { country: 'India', '2014': 2051228, '2015': 2073002, '2016': 2263790 }, { country: 'Italy', '2014': 2147744, '2015': 1815759, '2016': 1850740 } ]; } // getComboData() { return 'None,Left,Top,Right,Bottom,Center'.split(','); } }
.wj-flexgrid { height: 150px; margin-top:10px; } .wj-flexchart { height: 300px; } .wj-data-label { font-size: 75%; opacity: .9; } label { width: 150px; text-align: right; } .wj-control { margin-bottom: 3px; }
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packages: { "./src": { defaultExtension: 'ts' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);