Allow user to click Go before geocode result
authorRichard Fairhurst <richard@systemeD.net>
Wed, 22 Jan 2014 20:29:38 +0000 (20:29 +0000)
committerRichard Fairhurst <richard@systemeD.net>
Wed, 22 Jan 2014 20:29:38 +0000 (20:29 +0000)
app/assets/javascripts/routing.js.erb

index 27818b66b5748d9c71113b2f5a727d971720840e..7837c532771d3af28b457847bcda10621afb1f01 100644 (file)
@@ -11,9 +11,8 @@
        *** export GPX
        *** URL history (or do we consciously not want to support that?)
 
-       *** add MapQuest engine
        *** add YOURS engine
-       *** finish CloudMade engine
+       *** add GraphHopper engine
 */
 
 var TURN_INSTRUCTIONS=["",
@@ -49,15 +48,17 @@ OSM.RoutingEngines={
 
 OSM.Routing=function(map,name,jqSearch) {
        var r={};
+
        r.map=map;                              // Leaflet map
        r.name=name;                    // global variable name of this instance (needed for JSONP)
        r.jqSearch=jqSearch;    // JQuery object for search panel
 
-       r.route_from=null;
-       r.route_to=null;
-       r.viaPoints=[];
-       r.polyline=null;
-       r.chosenEngine=null;
+       r.route_from=null;              // null=unset, false=awaiting response, [lat,lon]=geocoded
+       r.route_to=null;                //  |
+       r.awaitingGeocode=false;// true if the user has requested a route, but we're waiting on a geocode result
+       r.viaPoints=[];                 // not yet used
+       r.polyline=null;                // Leaflet polyline object
+       r.chosenEngine=null;    // currently selected routing engine
 
        // Geocoding
 
@@ -68,6 +69,7 @@ OSM.Routing=function(map,name,jqSearch) {
                var querystring = '<%= NOMINATIM_URL %>search?q=' + encodeURIComponent(v) + '&format=json';
                // *** &accept-language=<%#= request.user_preferred_languages.join(',') %>
                // *** prefer current viewport
+               r[field.id]=false;
                $.getJSON(querystring, function(json) { _this._gotGeocode(json,field); });
        };
        
@@ -81,6 +83,10 @@ OSM.Routing=function(map,name,jqSearch) {
                var lat=Number(json[0].lat), lon=Number(json[0].lon);
                r[field.id]=[lat,lon];
                // ** update markers
+               if (r.awaitingGeocode) {
+                       r.awaitingGeocode=false;
+                       r.requestRoute();
+               }
        };
        
        // Route-fetching UI
@@ -89,6 +95,9 @@ OSM.Routing=function(map,name,jqSearch) {
                if (r.route_from && r.route_to) {
                        r.chosenEngine.getRoute(true,[r.route_from,r.route_to]);
                        // then, when the route has been fetched, it'll call the engine's gotRoute function
+               } else if (r.route_from==false || r.route_to==false) {
+                       // we're waiting for a Nominatim response before we can request a route
+                       r.awaitingGeocode=true;
                }
        };