React Vector Map - Dynamic Viewport

This demo illustrates how to change the map's viewport. Use the drop-down menu under the map to choose a continent and change the visible area so that the chosen continent is displayed optimally.

To implement this functionality, call the viewport(viewportCoordinates) method every time the drop-down box value changes. You can also implement the onCenterChanged and onZoomFactorChanged functions to display the map center's coordinates and the current zoom factor in text boxes under the map.

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TS JS

Backend API

import React, { useCallback, useRef, useState } from 'react'; import VectorMap, { Layer, ControlBar, VectorMapTypes } from 'devextreme-react/vector-map'; import TextBox from 'devextreme-react/text-box'; import SelectBox from 'devextreme-react/select-box'; import * as mapsData from 'devextreme-dist/js/vectormap-data/world.js'; import Switch from 'devextreme-react/switch'; import { viewportCoordinates, centerLabel, zoomLabel, continentLabel, } from './data.ts'; const bounds = [-180, 85, 180, -60]; const App = () => { const [coordinates, setCoordinates] = useState(viewportCoordinates[0].coordinates); const [zoomFactor, setZoomFactor] = useState('1.00'); const [center, setCenter] = useState('0.000, 46.036'); const [panVisible, setPanVisible] = useState(true); const [zoomVisible, setZoomVisible] = useState(true); const mapRef = useRef(null); const continentChanged = useCallback(({ value }) => { setCoordinates(value); mapRef.current.instance().viewport(value); }, [setCoordinates]); const zoomFactorChanged = useCallback((e: VectorMapTypes.ZoomFactorChangedEvent) => { setZoomFactor(e.zoomFactor.toFixed(2)); }, [setZoomFactor]); const centerChanged = useCallback((e: VectorMapTypes.CenterChangedEvent) => { const value = `${e.center[0].toFixed(3)}, ${e.center[1].toFixed(3)}`; setCenter(value); }, [setCenter]); const panVisibleChange = useCallback((value) => { setPanVisible(value); }, [setPanVisible]); const zoomVisibleChange = useCallback((value) => { setZoomVisible(value); }, [setZoomVisible]); return ( <div> <VectorMap id="vector-map" bounds={bounds} ref={mapRef} onZoomFactorChanged={zoomFactorChanged} onCenterChanged={centerChanged} > <ControlBar zoomVisible={zoomVisible} panVisible={panVisible} /> <Layer dataSource={mapsData.world} /> </VectorMap> <div className="options"> <div className="caption">Options</div> <div className="wrapper-option"> <div className="column"> <div className="option"> <span>Continent</span> <SelectBox dataSource={viewportCoordinates} displayExpr="continent" valueExpr="coordinates" inputAttr={continentLabel} value={coordinates} onValueChanged={continentChanged} width={210} /> </div> <div className="option"> <span>Zoom factor</span> <TextBox value={zoomFactor} inputAttr={zoomLabel} readOnly={true} width={210} /> </div> <div className="option"> <span>Center</span> <TextBox value={center} readOnly={true} inputAttr={centerLabel} width={210} /> </div> </div> <div className="column"> <div className="option"> <span>Pan control</span> <Switch value={panVisible} onValueChange={panVisibleChange} /> </div> <div className="option"> <span>Zoom bar</span> <Switch value={zoomVisible} onValueChange={zoomVisibleChange} /> </div> </div> </div> </div> </div> ); }; export default App;

import React, { useCallback, useRef, useState } from 'react'; import VectorMap, { Layer, ControlBar } from 'devextreme-react/vector-map'; import TextBox from 'devextreme-react/text-box'; import SelectBox from 'devextreme-react/select-box'; import * as mapsData from 'devextreme-dist/js/vectormap-data/world.js'; import Switch from 'devextreme-react/switch'; import { viewportCoordinates, centerLabel, zoomLabel, continentLabel, } from './data.js'; const bounds = [-180, 85, 180, -60]; const App = () => { const [coordinates, setCoordinates] = useState(viewportCoordinates[0].coordinates); const [zoomFactor, setZoomFactor] = useState('1.00'); const [center, setCenter] = useState('0.000, 46.036'); const [panVisible, setPanVisible] = useState(true); const [zoomVisible, setZoomVisible] = useState(true); const mapRef = useRef(null); const continentChanged = useCallback( ({ value }) => { setCoordinates(value); mapRef.current.instance().viewport(value); }, [setCoordinates], ); const zoomFactorChanged = useCallback( (e) => { setZoomFactor(e.zoomFactor.toFixed(2)); }, [setZoomFactor], ); const centerChanged = useCallback( (e) => { const value = `${e.center[0].toFixed(3)}, ${e.center[1].toFixed(3)}`; setCenter(value); }, [setCenter], ); const panVisibleChange = useCallback( (value) => { setPanVisible(value); }, [setPanVisible], ); const zoomVisibleChange = useCallback( (value) => { setZoomVisible(value); }, [setZoomVisible], ); return ( <div> <VectorMap id="vector-map" bounds={bounds} ref={mapRef} onZoomFactorChanged={zoomFactorChanged} onCenterChanged={centerChanged} > <ControlBar zoomVisible={zoomVisible} panVisible={panVisible} /> <Layer dataSource={mapsData.world} /> </VectorMap> <div className="options"> <div className="caption">Options</div> <div className="wrapper-option"> <div className="column"> <div className="option"> <span>Continent</span> <SelectBox dataSource={viewportCoordinates} displayExpr="continent" valueExpr="coordinates" inputAttr={continentLabel} value={coordinates} onValueChanged={continentChanged} width={210} /> </div> <div className="option"> <span>Zoom factor</span> <TextBox value={zoomFactor} inputAttr={zoomLabel} readOnly={true} width={210} /> </div> <div className="option"> <span>Center</span> <TextBox value={center} readOnly={true} inputAttr={centerLabel} width={210} /> </div> </div> <div className="column"> <div className="option"> <span>Pan control</span> <Switch value={panVisible} onValueChange={panVisibleChange} /> </div> <div className="option"> <span>Zoom bar</span> <Switch value={zoomVisible} onValueChange={zoomVisibleChange} /> </div> </div> </div> </div> </div> ); }; 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 viewportCoordinates = [{ continent: 'all', coordinates: 'null', }, { continent: 'NorthAmerica', coordinates: [-180, 84.52, -22.11, -1.57], }, { continent: 'SouthAmerica', coordinates: [-112.47, 14.26, -27.52, -57.44], }, { continent: 'Africa', coordinates: [-29.34, 39.09, 55.60, -39.00], }, { continent: 'Europe', coordinates: [-2.35, 70.91, 61.35, 35.84], }, { continent: 'Asia', coordinates: [27.62, 83.11, 180, -19.36], }, { continent: 'Australia', coordinates: [104.87, -6.61, 149.98, -45.87], }]; export const centerLabel = { 'aria-label': 'Center' }; export const zoomLabel = { 'aria-label': 'Zoom' }; export const continentLabel = { 'aria-label': 'Continent' };

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

export const viewportCoordinates = [ { continent: 'all', coordinates: 'null', }, { continent: 'NorthAmerica', coordinates: [-180, 84.52, -22.11, -1.57], }, { continent: 'SouthAmerica', coordinates: [-112.47, 14.26, -27.52, -57.44], }, { continent: 'Africa', coordinates: [-29.34, 39.09, 55.6, -39.0], }, { continent: 'Europe', coordinates: [-2.35, 70.91, 61.35, 35.84], }, { continent: 'Asia', coordinates: [27.62, 83.11, 180, -19.36], }, { continent: 'Australia', coordinates: [104.87, -6.61, 149.98, -45.87], }, ]; export const centerLabel = { 'aria-label': 'Center' }; export const zoomLabel = { 'aria-label': 'Zoom' }; export const continentLabel = { 'aria-label': 'Continent' };

<!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/24.1.7/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; } .options { padding: 20px; background-color: rgba(191, 191, 191, 0.15); margin-top: 20px; } .wrapper-option { display: flex; gap: 24px; padding-top: 16px; } .column { display: flex; gap: 10px; flex-direction: column; } .option { display: flex; align-items: center; min-height: 34px; } .caption { font-size: 18px; font-weight: 500; } .option > span { width: 140px; }

To show or hide the control bar, enable or disable the panVisible and zoomVisible properties. You can toggle switches under the map to see how these settings affect the control bar.