我有一个小叶地图,其缩放级别为2-7,并使用MarkerCluster插件,默认情况下,我有L.MarkerClusterGroup禁用群集缩放级别2(这意味着没有群集),我试图允许用户单击一个按钮,然后将聚类缩放级别更改为5.这可能吗?
我知道我可以通过制作两个markercluster组来实现它,一个没有聚类,一个具有聚类,并根据点击删除/添加它,但这看起来非常混乱。真的,有几种方法可以做到,但它们非常笨重。
代码:
默认值(2是最低缩放级别):
var markers = new L.MarkerClusterGroup (
{
disableClusteringAtZoom: 2,
maxClusterRadius: 100,
animateAddingMarkers: true
});
我想做的事情是:
$('#mcluster').click(function() {
//do some code that sets the disableClusterAtZoom to 5
});
答案 0 :(得分:0)
我无法找到一种方法来禁用群集或在缩放时为disableClustering设置新值,但我发现了一种不那么笨重的方法来实现这一点。
var markers = new L.LayerGroup(); //non cluster layer is added to map
markers.addTo(map);
var clusters = new L.MarkerClusterGroup (
{
disableClusteringAtZoom: 5,
maxClusterRadius: 100,
animateAddingMarkers: true
}); //cluster layer is set and waiting to be used
var clusterStatus = 'no'; //since non cluster group is on by default, the status for cluster is set to no
$('#mcluster').click(function( event ) {
if(clusterStatus === 'no'){
clusterStatus = 'yes';
var current1 = markers.getLayers(); //get current layers in markers
map.removeLayer(markers); // remove markers from map
clusters.clearLayers(); // clear any layers in clusters just in case
current1.forEach(function(item) { //loop through the current layers and add them to clusters
clusters.addLayer(item);
});
map.addLayer(clusters);
} else {
clusterStatus = 'no'; //we're turning off clustering here
var current2 = clusters.getLayers(); //same code as before just reversed
map.removeLayer(clusters);
markers.clearLayers();
current2.forEach(function(item) {
markers.addLayer(item);
});
map.addLayer(markers);
}
});
我确信有更优雅的解决方案,但凭借我不断增长的知识,这就是我想出来的。
答案 1 :(得分:0)
我知道你几个月前需要一个解决方案,但只是为了让你知道我最近发布了一个Leaflet.markercluster的子插件,它可以完全满足你的需求(带一些额外的代码):< strong> Leaflet.MarkerCluster.Freezable (演示here)。
var mcg = L.markerClusterGroup().addTo(map),
disableClusteringAtZoom = 2;
function changeClustering() {
if (map.getZoom() >= disableClusteringAtZoom) {
mcg.disableClustering(); // New method from sub-plugin.
} else {
mcg.enableClustering(); // New method from sub-plugin.
}
}
map.on("zoomend", changeClustering);
$('#mcluster').click(function () {
disableClusteringAtZoom = (disableClusteringAtZoom === 2) ? 5 : 2;
changeClustering();
});
mcg.addLayers(arrayOfMarkers);
// Initially disabled, as if disableClusteringAtZoom option were at 2.
changeClustering();
演示:http://jsfiddle.net/fqnbwg3q/3/
注意:在上面的演示中,我使用了一个细化来确保在重新启用群集时标记与动画合并。只需在使用enableClustering()
之前使用超时:
// Use a timeout to trigger clustering after the zoom has ended,
// and make sure markers animate.
setTimeout(function () {
mcg.enableClustering();
}, 0);