Half-ass solution to #8.

static/js/map.js

@@ -3,7 +3,7 @@ var BusMap = {
     zoomShowVehicles: 15,
     stopZoom: 16,
     vehicleMaxAge: 10,
-    locateOptions = { timeout: 3000, },
+    locateOptions: { timeout: 3000, },
 };
 
 /*
@@ -426,7 +426,8 @@ BusMap.Map = function(opts) {
     // Scaling: update what is displayed based on zoom level
     function zoomShowHide() {
         var zoom = that.leaflet.getZoom();
-        if (that.vehicleMarkersGroup) {
+        var got_vehicles = Object.keys(map.vehicleMarkers).length > 0;
+        if (got_vehicles && that.vehicleMarkersGroup) {
             if (zoom >= BusMap.zoomShowVehicles
               && !(that.leaflet.hasLayer(that.vehicleMarkersGroup))) {
                 that.leaflet.addLayer(that.vehicleMarkersGroup);
@@ -485,9 +486,15 @@ BusMap.Map = function(opts) {
 
     // Go to zoom level and map center where vehicles are visible.
     function goToVehicles() {
-        // TODO: this
         var zoom = BusMap.zoomShowVehicles;
-        console.log("going to zoom " + zoom);
+        var veh_keys = Object.keys(that.vehicleMarkers);
+        if (veh_keys.length > 0) {
+            var ll = that.vehicleMarkers[veh_keys[0]].getLatLng();
+        } else {
+            var ll = that.leaflet.getCenter();
+        }
+        console.log("setView("+ll+","+zoom+")");
+        that.leaflet.setView(ll, zoom);
     }
 
     init();