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Zooming and Centering

This demo shows the VectorMap zooming and centering capabilities. The map contains several cities represented by dot markers. To identify a city, pause on its marker, and the name of the city will appear in a tooltip. Moreover, if you click the marker, the map will be zoomed and centered on it. In code it is performed by calling the center(centerCoordinates) and zoomFactor(zoomFactor) methods. A click on the «Reset» button restores default center coordinates and zoom factor.

Backend API
import React, { useCallback, useRef } from 'react'; import VectorMap, { ITooltipProps, Layer, Tooltip, } from 'devextreme-react/vector-map'; import Button from 'devextreme-react/button'; import * as mapsData from 'devextreme-dist/js/vectormap-data/world.js'; import { markers } from './data.ts'; const bounds = [-180, 85, 180, -60]; const customizeTooltip: ITooltipProps['customizeTooltip'] = (arg) => { if (arg.layer.type === 'marker') { return { text: arg.attribute('name') }; } return null; }; const markerClick = ({ target, component }) => { if (target?.layer.type === 'marker') { component.center(target.coordinates()).zoomFactor(10); } }; const App = () => { const vectorMapRef = useRef(null); const reset = useCallback(() => { vectorMapRef.current.instance().center(null); vectorMapRef.current.instance().zoomFactor(null); }, [vectorMapRef]); return ( <React.Fragment> <VectorMap ref={vectorMapRef} id="vector-map" onClick={markerClick} bounds={bounds} > <Layer dataSource={mapsData.world} hoverEnabled={false} /> <Layer dataSource={markers} /> <Tooltip enabled={true} customizeTooltip={customizeTooltip} /> </VectorMap> <Button text="Reset" id="reset" onClick={reset} /> </React.Fragment> ); }; export default App;
import React, { useCallback, useRef } from 'react'; import VectorMap, { Layer, Tooltip } from 'devextreme-react/vector-map'; import Button from 'devextreme-react/button'; import * as mapsData from 'devextreme-dist/js/vectormap-data/world.js'; import { markers } from './data.js'; const bounds = [-180, 85, 180, -60]; const customizeTooltip = (arg) => { if (arg.layer.type === 'marker') { return { text: arg.attribute('name') }; } return null; }; const markerClick = ({ target, component }) => { if (target?.layer.type === 'marker') { component.center(target.coordinates()).zoomFactor(10); } }; const App = () => { const vectorMapRef = useRef(null); const reset = useCallback(() => { vectorMapRef.current.instance().center(null); vectorMapRef.current.instance().zoomFactor(null); }, [vectorMapRef]); return ( <React.Fragment> <VectorMap ref={vectorMapRef} id="vector-map" onClick={markerClick} bounds={bounds} > <Layer dataSource={mapsData.world} hoverEnabled={false} /> <Layer dataSource={markers} /> <Tooltip enabled={true} customizeTooltip={customizeTooltip} /> </VectorMap> <Button text="Reset" id="reset" onClick={reset} /> </React.Fragment> ); }; export default App;
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.tsx'; ReactDOM.render( <App />, document.getElementById('app'), );
export const markers = [ { coordinates: [-0.1262, 51.5002], attributes: { name: 'London', }, }, { coordinates: [149.1286, -35.2820], attributes: { name: 'Canberra', }, }, { coordinates: [139.6823, 35.6785], attributes: { name: 'Tokyo', }, }, { coordinates: [-77.0241, 38.8921], attributes: { name: 'Washington', }, }, { coordinates: [-75.6794, 45.4214], attributes: { name: 'Ottawa', }, }, { coordinates: [37.617778, 55.751667], attributes: { name: 'Moscow', }, }, { coordinates: [116.4, 39.933333], attributes: { name: 'Beijing', }, }, { coordinates: [12.5, 41.9], attributes: { name: 'Rome', }, }, { coordinates: [23.716667, 38], attributes: { name: 'Athens', }, }, { coordinates: [2.333333, 48.833333], attributes: { name: 'Paris', }, }, { coordinates: [-3.683333, 40.4], attributes: { name: 'Madrid', }, }, { coordinates: [-47.866667, -15.798889], attributes: { name: 'Brasilia', }, }, ];
window.exports = window.exports || {}; window.config = { transpiler: 'ts', typescriptOptions: { module: 'system', emitDecoratorMetadata: true, experimentalDecorators: true, jsx: 'react', }, meta: { 'react': { 'esModule': true, }, 'typescript': { 'exports': 'ts', }, 'devextreme/time_zone_utils.js': { 'esModule': true, }, 'devextreme/localization.js': { 'esModule': true, }, 'devextreme/viz/palette.js': { 'esModule': true, }, 'devextreme-dist/js/vectormap-data/*': { 'esModule': true, }, }, paths: { 'npm:': 'https://unpkg.com/', }, defaultExtension: 'js', map: { 'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js', 'typescript': 'npm:typescript@4.2.4/lib/typescript.js', 'react': 'npm:react@17.0.2/umd/react.development.js', 'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js', 'prop-types': 'npm:prop-types@15.8.1/prop-types.js', 'devextreme-dist/js/vectormap-data': 'npm:devextreme-dist@24.1.3/js/vectormap-data', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@24.1.3/cjs', 'devextreme-react': 'npm:devextreme-react@24.1.3/cjs', 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.8/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.56/dist/dx-gantt.js', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js', 'devextreme-cldr-data': 'npm:devextreme-cldr-data@1.0.3', // SystemJS plugins 'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js', // Prettier 'prettier/standalone': 'npm:prettier@2.8.8/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js', }, packages: { 'devextreme': { defaultExtension: 'js', }, 'devextreme-react': { main: 'index.js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/localization/messages': { format: 'json', defaultExtension: 'json', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.13/inferno/package.json', ], babelOptions: { sourceMaps: false, stage0: true, react: true, }, }; System.config(window.config);
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render(<App />, document.getElementById('app'));
export const markers = [ { coordinates: [-0.1262, 51.5002], attributes: { name: 'London', }, }, { coordinates: [149.1286, -35.282], attributes: { name: 'Canberra', }, }, { coordinates: [139.6823, 35.6785], attributes: { name: 'Tokyo', }, }, { coordinates: [-77.0241, 38.8921], attributes: { name: 'Washington', }, }, { coordinates: [-75.6794, 45.4214], attributes: { name: 'Ottawa', }, }, { coordinates: [37.617778, 55.751667], attributes: { name: 'Moscow', }, }, { coordinates: [116.4, 39.933333], attributes: { name: 'Beijing', }, }, { coordinates: [12.5, 41.9], attributes: { name: 'Rome', }, }, { coordinates: [23.716667, 38], attributes: { name: 'Athens', }, }, { coordinates: [2.333333, 48.833333], attributes: { name: 'Paris', }, }, { coordinates: [-3.683333, 40.4], attributes: { name: 'Madrid', }, }, { coordinates: [-47.866667, -15.798889], attributes: { name: 'Brasilia', }, }, ];
<!DOCTYPE html> <html lang="en"> <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=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.3/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.tsx"); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>
#vector-map { height: 420px; } #reset { margin: 10px 2px; }