Custom Axis Labels (Angular)

The Axis class has an itemFormatter property that allows you to customize the content and appearance of specific labels along the axes.

If specified, the itemFormatter function takes two parameters:

  1. engine: The IRenderEngine object used for rendering the labels.
  2. label: An object that represents the label and has these properties:
    • value: The value that the label represents.
    • text: The text content of the label (usually the formatted value).
    • pos: The position where the label will be rendered, in control coordinates.
    • cls: A CSS class to be applied to the label element.

Learn about FlexChart | Axis Label 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, ɵresolveComponentResources } from '@angular/core'; import { BrowserModule, bootstrapApplication } from '@angular/platform-browser'; import { WjChartModule } from '@mescius/wijmo.angular2.chart'; import { DataService } from './app.data'; import { isArray, Point } from '@mescius/wijmo'; import { Palettes } from '@mescius/wijmo.chart'; // @Component({ standalone: true, providers: [DataService], imports: [WjChartModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html', }) export class AppComponent { data: any[]; palette: any; // constructor(@Inject(DataService) private dataService: DataService) { this.data = dataService.getData(); this.palette = this.getRandomPalette(); } // itemFormatter(_: any, label: { val: any; text: string; pos: Point; cls: string }) { if (label.val >= 10000000) { label.cls = 'high-value'; } else if (label.val < 5000000) { label.cls = 'low-value'; } return label; } // getRandomPalette() { let palettes = Object.keys(Palettes).filter((prop) => isArray(Palettes[prop])); let rand = Math.floor(Math.random() * palettes.length); // return Palettes[palettes[rand]]; } } // // 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 Custom Axis Labels/Formatted 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"> <wj-flex-chart header="Country GDP" bindingX="country" [itemsSource]="data" [palette]="palette"> <wj-flex-chart-axis wjProperty="axisY" [itemFormatter]="itemFormatter"></wj-flex-chart-axis> <wj-flex-chart-series name="2014" binding="2014"></wj-flex-chart-series> <wj-flex-chart-series name="2015" binding="2015"></wj-flex-chart-series> <wj-flex-chart-series name="2016" binding="2016"></wj-flex-chart-series> </wj-flex-chart> </div> </div>
import { Injectable } from '@angular/core'; // @Injectable() export class DataService { 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 } ]; } }
.wj-flexchart { height: 300px; } .high-value { fill: darkgreen; font-weight: bold; } .low-value { fill: darkred; } .wj-control { margin-bottom: 6px; } body { margin-bottom: 24pt; }
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'@angular/router': 'npm:@angular/router/fesm2022/router.mjs', '@angular/forms': 'npm:@angular/forms/fesm2022/forms.mjs', }, // packages tells the System loader how to load when no filename and/or no extension packages: { "./src": { defaultExtension: 'ts' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);