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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.

Backend API
$(() => { const map = $('#vector-map').dxVectorMap({ layers: { dataSource: DevExpress.viz.map.sources.world, }, bounds: [-180, 85, 180, -60], onZoomFactorChanged(e) { zoomFactor.option('value', e.zoomFactor.toFixed(2)); }, onCenterChanged(e) { center.option('value', `${e.center[0].toFixed(3) }, ${e.center[1].toFixed(3)}`); }, }).dxVectorMap('instance'); $('#switchPan').dxSwitch({ value: true, onValueChanged: (e) => map.option('controlBar.panVisible', e.value), }); $('#switchZoom').dxSwitch({ value: true, onValueChanged: (e) => map.option('controlBar.zoomVisible', e.value), }); $('#choose-continent').dxSelectBox({ dataSource: viewportCoordinates, width: 210, displayExpr: 'continent', valueExpr: 'coordinates', value: viewportCoordinates[0].coordinates, inputAttr: { 'aria-label': 'Continent' }, onValueChanged(data) { map.viewport(data.value); }, }); const zoomFactor = $('#zoom-factor').dxTextBox({ width: 210, readOnly: true, inputAttr: { 'aria-label': 'Zoom' }, value: '1.00', }).dxTextBox('instance'); const center = $('#center').dxTextBox({ width: 210, readOnly: true, inputAttr: { 'aria-label': 'Center' }, value: '0.000, 46.036', }).dxTextBox('instance'); });
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" 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" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.3/css/dx.light.css" /> <script src="js/dx.all.js"></script> <script src="https://cdn3.devexpress.com/jslib/24.1.3/js/vectormap-data/world.js"></script> <script src="https://cdn3.devexpress.com/jslib/24.1.3/js/vectormap-data/africa.js"></script> <script src="https://cdn3.devexpress.com/jslib/24.1.3/js/vectormap-data/canada.js"></script> <script src="https://cdn3.devexpress.com/jslib/24.1.3/js/vectormap-data/eurasia.js"></script> <script src="https://cdn3.devexpress.com/jslib/24.1.3/js/vectormap-data/europe.js"></script> <script src="https://cdn3.devexpress.com/jslib/24.1.3/js/vectormap-data/usa.js"></script> <script src="data.js"></script> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="vector-map"></div> <div class="options"> <div class="caption">Options</div> <div class="wrapper-option"> <div class="column"> <div class="option"> <span>Continent</span> <div id="choose-continent"></div> </div> <div class="option"> <span>Zoom factor</span> <div id="zoom-factor"></div> </div> <div class="option"> <span>Center</span> <div id="center"></div> </div> </div> <div class="column"> <div class="option"> <span>Pan control</span> <div id="switchPan"></div> </div> <div class="option"> <span>Zoom bar</span> <div id="switchZoom"></div> </div> </div> </div> </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; }
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], }];

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.