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JavaScript/jQuery Vector Map - Zooming and Centering
This demo shows the JavaScript 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.
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Backend API
x
$(() => {
const map = $('#vector-map').dxVectorMap({
tooltip: {
enabled: true,
customizeTooltip(arg) {
if (arg.layer.type === 'marker') {
return { text: arg.attribute('name') };
}
return null;
},
},
onClick(e) {
if (e.target && e.target.layer.type === 'marker') {
e.component.center(e.target.coordinates());
e.component.zoomFactor(10);
}
},
bounds: [-180, 85, 180, -60],
layers: [{
dataSource: DevExpress.viz.map.sources.world,
hoverEnabled: false,
}, {
dataSource: markers,
}],
}).dxVectorMap('instance');
$('#reset').dxButton({
text: 'Reset',
onClick() {
map.center(null).zoomFactor(null);
},
});
});
xxxxxxxxxx
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>↔</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="vector-map"></div>
<div id="reset"></div>
</div>
</body>
</html>
xxxxxxxxxx
#vector-map {
height: 420px;
}
#reset {
margin: 10px 2px;
}
xxxxxxxxxx
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',
},
},
];