Palettes (React)

The FlexChart control automatically picks colors for each series based on a default palette, which you can override by setting the palette property.

Learn about FlexChart | Styling Series Documentation | FlexChart API Reference

This example uses React.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React, { useState } from 'react'; import useEvent from 'react-use-event-hook'; import * as wjChart from '@mescius/wijmo.react.chart'; import * as wjInput from '@mescius/wijmo.react.input'; import { Color } from '@mescius/wijmo'; import { Palettes } from '@mescius/wijmo.chart'; import { data, paletteData } from './data'; function App() { const [palette, setPalette] = useState(null); const selectedIndexChanged = useEvent((s) => { setPalette(s.selectedItem.colors); }); const formatItem = useEvent((s, e) => { let item = e.data; if (item.name && item.colors) { // create palette swatch let html = '<div style="width:100px;display:inline-block">' + item.name + '</div>'; item.colors.forEach((clr) => html += `<div style="width:1em;height:1em;display:inline-block;background-color:${clr};"></div>`); e.item.innerHTML = html; } }); const chartItemFormatter = useEvent((engine, ht, defRender) => { const pal = ht.chart.palette ? ht.chart.palette : Palettes.standard; engine.fill = pal[ht.pointIndex]; // each bar has own color engine.stroke = null; defRender(); }); const pieItemFormatter = useEvent((engine, ht, defRender) => { let clr = new Color(engine.fill); clr.a = 1; // use opaque color engine.fill = clr.toString(); engine.stroke = null; defRender(); }); return (<div className="container-fluid"> <div className="row"> <label>Please select a Palette:</label> <wjInput.ComboBox itemsSource={paletteData} showGroups={true} displayMemberPath="name" selectedIndexChanged={selectedIndexChanged} formatItem={formatItem}/> </div> <div className="row"> <div className="col"> <wjChart.FlexChart header="Country GDP" footer="2016, in USD billions" tooltipContent="<b>{country}</b><br>{value}" itemsSource={data} bindingX="country" palette={palette} itemFormatter={chartItemFormatter}> <wjChart.FlexChartSeries binding="2016"/> </wjChart.FlexChart> </div> <div className="col"> <wjChart.FlexPie header="Country GDP" footer="2016, in USD billions" itemsSource={data} bindingName="country" binding="2016" palette={palette} itemFormatter={pieItemFormatter}> </wjChart.FlexPie> </div> </div> </div>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo Wijmo FlexChart Palettes</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
label { margin-right: 3px; } .row { margin: 1em; } .col { float: left; width: 50%; } .wj-flexchart { margin: 12px; height: 360px; }
import { CollectionView } from '@mescius/wijmo'; import { Palettes } from '@mescius/wijmo.chart'; 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 } ]; } function getPaletteData() { let items = []; let palettes = Palettes; for (let key in palettes) { if (!palettes.hasOwnProperty(key)) { continue; } if (Array.isArray(palettes[key])) { items.push({ name: key, colors: palettes[key] }); } else { for (let subkey in palettes[key]) { if (palettes[key].hasOwnProperty(subkey)) { items.push({ name: subkey, colors: palettes[key][subkey], group: key }); } } } } return new CollectionView(items, { groupDescriptions: ['group'] }); } export const data = getData(); export const paletteData = getPaletteData();
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