Data Labels

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

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import { isArray } from '@grapecity/wijmo'; import { ComboBox } from '@grapecity/wijmo.input'; import { FlexChart, Palettes } from '@grapecity/wijmo.chart'; import { getData } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // create a chart let downloadsOnly = false, theChart = new FlexChart('#theChart', { itemsSource: getData(), bindingX: 'country', tooltip: { content: '' }, header: 'Country GDP', series: [{ binding: '2014', name: '2014' }, { binding: '2015', name: '2015' }, { binding: '2016', name: '2016' }], dataLabel: { content: '{value:n0,,}T', position: 'Top', rendering: (_, e) => { if (downloadsOnly && e.hitTestInfo.series.binding != '2016') { e.cancel = true; // labels only for the "downloads" series } } }, options: { groupWidth: '90%' } }); theChart.palette = getRandomPalette(); // // customize the data labels let labelPosition = new ComboBox('#labelPosition', { itemsSource: 'None,Left,Top,Right,Bottom,Center'.split(','), textChanged: (s) => { theChart.dataLabel.position = s.text; }, text: 'Top' }); // document.querySelector('#linesAndBorders').addEventListener('click', e => { let dl = theChart.dataLabel; dl.connectingLine = dl.border = e.target.checked; }); // document.querySelector('#downloadsOnly').addEventListener('click', e => { downloadsOnly = e.target.checked; theChart.invalidate(); }); } // function getRandomPalette() { let palettes = Object.keys(Palettes).filter(prop => isArray(Palettes[prop])); let rand = Math.floor(Math.random() * palettes.length); // return Palettes[palettes[rand]]; }
<!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"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class="container-fluid"> <label for="labelPosition">Label Position: </label> <div id="labelPosition"></div><br /> <label for="linesAndBorders">Lines/Borders: </label> <input id="linesAndBorders" type="checkbox"><br /> <label for="downloadsOnly">2016 Only: </label> <input id="downloadsOnly" type="checkbox"> <div id="theChart"></div> </div> </body> </html>
// list of country GDP // https://en.wikipedia.org/wiki/List_of_IMF_ranked_countries_by_GDP export function 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-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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