Add support for displaying a map covering a specified bounding box.

[rails.git] / app / views / site / index.rhtml

diff --git a/app/views/site/index.rhtml b/app/views/site/index.rhtml
index 5b9fd84f65ea4f376613229be7b22649c2f74b7f..8e52166c875c9ab6b8c7a941ee6616be7b42f1de 100644 (file)
--- a/app/views/site/index.rhtml
+++ b/app/views/site/index.rhtml
@@ -6,14 +6,26 @@
 <% mlat = params['mlat'] %>
 <% end %>
 
+<% if params['minlon'] and params['minlat'] and params['maxlon'] and params['maxlat'] %>
+<% bbox = true %>
+<% minlon = params['minlon'] %>
+<% minlat = params['minlat'] %>
+<% maxlon = params['maxlon'] %>
+<% maxlat = params['maxlat'] %>
+<% end %>
+
 <% if params['lon'] and params['lat'] %>
 <% lon =  params['lon'] %>
 <% lat =  params['lat'] %>
 <% zoom =  params['zoom'] || '5' %>
+<% layers = params['layers'] %>
 <% elsif params['mlon'] and params['mlat'] %>
 <% lon = params['mlon'] %> 
 <% lat = params['mlat'] %>
 <% zoom =  params['zoom'] || '12' %>
+<% layers = params['layers'] %>
+<% elsif cookies.key?("location") %>
+<% lon,lat,zoom,layers = cookies["location"].value.first.split(",") %>
 <% elsif @user and !@user.home_lon.nil? and !@user.home_lat.nil? %> 
 <% lon =  @user.home_lon %>
 <% lat =  @user.home_lat %>
@@ -22,6 +34,7 @@
 <% lon =  '-0.1' %>
 <% lat =  '51.5' %>
 <% zoom =  params['zoom'] || '5' %>
+<% layers = params['layers'] %>
 <% end %>
 
 <script type="text/javascript" src="/openlayers/OpenLayers.js"></script>
@@ -38,6 +51,15 @@
   var map;
 
   function init(){
+    var map = createMap("map");
+
+    <% if bbox %>
+    var min = lonLatToMercator(new OpenLayers.LonLat(<%= minlon %>, <%= minlat %>));
+    var max = lonLatToMercator(new OpenLayers.LonLat(<%= maxlon %>, <%= maxlat %>));
+    var bbox = new OpenLayers.Bounds(min.lon, min.lat, max.lon, max.lat);
+
+    map.zoomToExtent(bbox);
+    <% else %>
     var centre = lonLatToMercator(new OpenLayers.LonLat(<%= lon %>, <%= lat %>));
     var zoom = <%= zoom %>;
 
@@ -45,12 +67,17 @@
     zoom = scaleToZoom(<%= params['scale'].to_f() %>);
     <% end %>
 
-    var map = createMap("map", centre, zoom);
+    map.setCentre(center, zoom);
+    <% end %>
 
     <% if marker %>
     addMarkerToMap(lonLatToMercator(new OpenLayers.LonLat(<%= mlon %>, <%= mlat %>)));
     <% end %>
 
+    <% if layers %>
+    setMapLayers("<%= layers %>");
+    <% end %>
+
     map.events.register("moveend", map, updateLocation);
     updateLocation();
 
@@ -71,8 +98,11 @@
   function updateLocation() {
     var lonlat = mercatorToLonLat(map.getCenter());
     var zoom = map.getZoom();
+    var layers = getMapLayers();
+
+    updatelinks(lonlat.lon, lonlat.lat, zoom, layers);
 
-    updatelinks(lonlat.lon, lonlat.lat, zoom);
+    document.cookie = "location=" + lonlat.lon + "," + lonlat.lat + "," + zoom + "," + layers;
   }
 
   function getStyle( el, property ) {