Zooming and Centering
Documentation
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.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
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import React from 'react';
import Map, {
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];
class App extends React.Component {
constructor(props) {
super(props);
this.storeVectorMap = (component) => {
this.vectorMap = component.instance;
};
this.reset = () => {
this.vectorMap.center(null);
this.vectorMap.zoomFactor(null);
};
}
customizeTooltip(arg) {
if (arg.layer.type === 'marker') {
return { text: arg.attribute('name') };
}
}
markerClick(e) {
if (e.target && e.target.layer.type === 'marker') {
e.component.center(e.target.coordinates()).zoomFactor(10);
}
}
render() {
return (
<div>
<Map
ref={this.storeVectorMap}
id={'vector-map'}
onClick={this.markerClick}
bounds={bounds}>
<Layer
dataSource={mapsData.world}
hoverEnabled={false}>
</Layer>
<Layer
dataSource={markers}
/>
<Tooltip enabled={true}
customizeTooltip={this.customizeTooltip}
></Tooltip>
</Map>
<Button
text={'Reset'}
id={'reset'}
onClick={this.reset}
></Button>
</div>
);
}
}
export default App;
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/19.2.3/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.3/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="https://unpkg.com/core-js@2.4.1/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: 420px;
}
#reset {
margin: 10px 2px;
}
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'
}
}
];
System.config({
transpiler: 'plugin-babel',
meta: {
'devextreme/dist/js/vectormap-data/*': {
esModule: true
}
},
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@16/umd/react.development.js',
'react-dom': 'npm:react-dom@16/umd/react-dom.development.js',
'prop-types': 'npm:prop-types/prop-types.js',
'devextreme': 'npm:devextreme@19.2',
'devextreme/dist/js/vectormap-data': 'npm:devextreme@19.2/dist/js/vectormap-data',
'devextreme-react': 'npm:devextreme-react@19.2',
'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.7/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram',
'devexpress-gantt': 'npm:devexpress-gantt',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js',
'systemjs-babel-build':
'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js'
},
packages: {
'devextreme': {
defaultExtension: 'js'
},
'devextreme-react': {
main: 'index.js'
}
},
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
});