クリックとズーム機能の追加

Question

以下のアプリがあります（ICGC WEB PORTAL）上部のどのボタンがクリックされたかに基づいて、特定の国がハイライトされます。以下について助けが必要です:<\/P> <\/P> クリックされた国にパン（？）／センターを合わせ、ズームレベルも上げたいです。<\/P> これが私の試みです<\/P> <\/P> function getExtent(){<\/P> var lat = map.getCenter().lat;<\/P> var lng = map.getCenter().lng;<\/P> var newCord = [lat, lng];<\/P> return newCord;<\/P> }<\/P> <\/P> function highlightFeature(e){<\/P> var newCenter = getExtent(); <--<\/P> var layer = e.target<\/P> [省略された内容]<\/P> }<\/P> <\/P> function onEachFeature(feature, layer){<\/P> layer.on({<\/P> click: highlightFeature<\/P> });<\/P> }<\/P> <\/P> countries = L.geoJson(featureCollection, {<\/P> onEachFeature: onEachFeature<\/P> }).addTo(map);<\/P> <\/P> <\/P> スクリプト添付<\/P>

JohnGravois · Accepted Answer

the easiest thing to do would just be to listen for the 'click' event of your featureLayer and use that opportunity to retrieve its bounds and pass them to the map.

featureLayer.on('click', function(evt) {
    // http://leafletjs.com/reference.html#featuregroup-getbounds
    var bounds = evt.layer.getBounds()
    // http://leafletjs.com/reference.html#map-fitbounds
    map.fitBounds(bounds);
});

this is possible because 'L.esri.FeatureLayer' extends 'L.geoJson' and 'L.geoJson' extends 'L.featureGroup', which has a method 'getBounds()'.  you can find a working example here.

between all the inheritance and the fact that the documentation for Esri Leaflet and Leaflet itself are in two different places, stuff like this can be confusing until you get the hang of it.