Colors Customization

Documentation

This demo shows how to color different map elements. The map represented here indicates the top ten largest countries in the world by means of colors. These colors are assigned to the map areas using the customize callback function of the layers object. Moreover, when one of the areas is selected or hovered over, its color changes to those specified by the selectedColor and hoveredColor properties.

Tooltips for the map areas representing the largest countries are customized as well. Using the tooltip | customizeTooltip callback function, they are colored identical to the areas themselves and display the total area of the country.

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Backend API

import React from 'react'; import VectorMap, { Layer, Tooltip, Border, Font, } from 'devextreme-react/vector-map'; import * as mapsData from 'devextreme-dist/js/vectormap-data/world.js'; import { countries } from './data.js'; const bounds = [-180, 85, 180, -60]; export default function App() { return ( <VectorMap id="vector-map" bounds={bounds} onClick={clickHandler} > <Layer dataSource={mapsData.world} customize={customizeLayer}> </Layer> <Tooltip enabled={true} customizeTooltip={customizeTooltip} > <Border visible={true}></Border> <Font color="#fff"></Font> </Tooltip> </VectorMap> ); } function customizeTooltip(arg) { const name = arg.attribute('name'); const country = countries[name]; if (country) { return { text: `${name}: ${country.totalArea}M km&#178`, color: country.color, }; } return null; } function clickHandler({ target }) { if (target && countries[target.attribute('name')]) { target.selected(!target.selected()); } } function customizeLayer(elements) { elements.forEach((element) => { const country = countries[element.attribute('name')]; if (country) { element.applySettings({ color: country.color, hoveredColor: '#e0e000', selectedColor: '#008f00', }); } }); }

import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render( <App />, document.getElementById('app'), );

<!DOCTYPE html> <html> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/23.1.5/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import("./index.js"); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>

#vector-map { height: 440px; }

export const countries = { Russia: { totalArea: 17.12, color: '#1E90FF' }, Canada: { totalArea: 9.98, color: '#B8860B' }, China: { totalArea: 9.59, color: '#BDB76B' }, 'United States': { totalArea: 9.52, color: '#FFA07A' }, Brazil: { totalArea: 8.51, color: '#3CB371' }, Australia: { totalArea: 7.69, color: '#D8BFD8' }, India: { totalArea: 3.29, color: '#DB7093' }, Argentina: { totalArea: 2.78, color: '#FFD700' }, Kazakhstan: { totalArea: 2.72, color: '#CD5C5C' }, Algeria: { totalArea: 2.38, color: '#B0C4DE' }, };