Zoom out when switching to a layer with a lower maxZoom

[rails.git] / app / assets / javascripts / index.js

diff --git a/app/assets/javascripts/index.js b/app/assets/javascripts/index.js
index a19a6a61e5c714b318b2d55441ab3b2332e2b1d8..7f4887469c6c8f13ef8702430792446ced01d954 100644 (file)
--- a/app/assets/javascripts/index.js
+++ b/app/assets/javascripts/index.js
@@ -53,10 +53,14 @@ $(document).ready(function () {
 
   function updateLayers(params) {
     var layerParam = params.layers || "M";
+    var layersAdded = "";
 
     for (var i = layers.length - 1; i >= 0; i--) {
       if (layerParam.indexOf(layers[i].options.code) >= 0) {
         map.addLayer(layers[i]);
+        layersAdded = layersAdded + layers[i].options.code;
+      } else if (i == 0 && layersAdded == "") {
+        map.addLayer(layers[i]);
       } else {
         map.removeLayer(layers[i]);
       }
@@ -69,6 +73,12 @@ $(document).ready(function () {
     updateLayers(OSM.mapParams());
   });
 
+  map.on("baselayerchange", function (e) {
+    if (map.getZoom() > e.layer.options.maxZoom) {
+      map.setView(map.getCenter(), e.layer.options.maxZoom, { reset: true });
+    }
+  });
+
   map.noteLayer = new L.LayerGroup();
   map.noteLayer.options = {code: 'N'};