Data Labels (React)

The dataLabels property allows you to show labels next to each data point on the chart.

This example uses React.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './app.css'; // import * as React from 'react'; import * as ReactDOM from 'react-dom'; // import * as Chart from '@grapecity/wijmo.react.chart'; import * as Input from '@grapecity/wijmo.react.input'; import * as wjChart from '@grapecity/wijmo.chart'; import { getData, getComboData } from './data'; // class App extends React.Component { constructor(props) { super(props); this.state = { data: getData(), comboData: getComboData(), palette: this.getRandomPalette(), position: "Top", downloadsOnly: false, showLinesAndBorders: false, }; } render() { return <div className="container"> <div className="form-group"> <label>Label Position: <Input.ComboBox itemsSource={this.state.comboData} textChanged={this.textChanged.bind(this)} text={this.state.position}> </Input.ComboBox> </label> <label>Lines/Borders: <input id="checkBoxLinesAndBorders" type="checkbox" checked={this.state.showLinesAndBorders} onChange={this.showLinesAndBordersChanged.bind(this)}/><br /> </label> <label>2016 Only: <input id="checkBoxDownloadsOnly" type="checkbox" checked={this.state.downloadsOnly} onChange={this.downloadsOnlyChanged.bind(this)}/><br /> </label> <div className="form-group"> <Chart.FlexChart bindingX="country" itemsSource={this.state.data} tooltipContent="" header="Country GDP" initialized={this.chartInitialized.bind(this)} palette={this.state.palette}> <Chart.FlexChartSeries name="2014" binding="2014"></Chart.FlexChartSeries> <Chart.FlexChartSeries name="2015" binding="2015"></Chart.FlexChartSeries> <Chart.FlexChartSeries name="2016" binding="2016"></Chart.FlexChartSeries> <Chart.FlexChartDataLabel content="{value:n0,,}T" position={this.state.position}></Chart.FlexChartDataLabel> </Chart.FlexChart> </div> </div> </div>; } chartInitialized(flex) { this.theChart = flex; flex.dataLabel.rendering.addHandler(function (_, e) { if (this.state.downloadsOnly && e.hitTestInfo.series.binding != '2016') { e.cancel = true; // labels only for the "downloads" series } }, this); } textChanged(s) { this.setState({ position: s.text }); } showLinesAndBordersChanged() { if (this.theChart) { let dl = this.theChart.dataLabel; dl.connectingLine = dl.border = !this.state.showLinesAndBorders; } this.setState({ showLinesAndBorders: !this.state.showLinesAndBorders }); } downloadsOnlyChanged() { if (this.theChart) { this.setState({ downloadsOnly: !this.state.downloadsOnly }); this.theChart.invalidate(); } } getRandomPalette() { let palettes = Object.getOwnPropertyNames(wjChart.Palettes) .filter(prop => typeof wjChart.Palettes[prop] === "object" && prop !== 'prototype'); let rand = Math.floor(Math.random() * palettes.length); // return wjChart.Palettes[palettes[rand]]; } } ReactDOM.render(<App />, document.getElementById('app'));
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity 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 id="app"></div> </body> </html>
body { margin-bottom: 24px; } label { margin-right: 3px; padding: 10px; } input { vertical-align: top; margin-left: 5px !important; }
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 } ]; } export function getComboData() { return 'None,Left,Top,Right,Bottom,Center'.split(','); }
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