added img_path option to map_layers

lib/view_helpers.rb

@@ -9,7 +9,7 @@ module ViewHelpers
     # * options[:yahoo] with Yahoo appid: Include Yahoo! Maps
     # * options[:proxy] with name of controller with proxy action. Defaults to current controller.
     def map_layers_includes(options = {})
-      options.assert_valid_keys(:google, :multimap, :openstreetmap, :virtualearth, :yahoo, :proxy)
+      options.assert_valid_keys(:google, :multimap, :openstreetmap, :virtualearth, :yahoo, :proxy,:img_path)
       html = ''
       if options.has_key?(:google)
         html << "<script type=\"text/javascript\" src=\"http://maps.google.com/maps?file=api&amp;v=2&amp;key=#{options[:google]}\"></script>"
@@ -23,7 +23,10 @@ def map_layers_includes(options = {})
       if options.has_key?(:yahoo)
         html << "<script type=\"text/javascript\" src=\"http://api.maps.yahoo.com/ajaxymap?v=3.0&appid=#{options[:yahoo]}\"></script>"
       end
-
+      img_path = '/images/OpenLayers/'
+      if options.has_key?(:img_path)
+        img_path = options[:img_path]
+      end
       if RAILS_ENV == "development" && File.exist?(File.join(RAILS_ROOT, 'public/javascripts/lib/OpenLayers.js'))
         html << '<script src="/javascripts/lib/Firebug/firebug.js"></script>'
         html << '<script src="/javascripts/lib/OpenLayers.js"></script>'
@@ -32,7 +35,7 @@ def map_layers_includes(options = {})
       end
 
       html << stylesheet_link_tag("map")
-      html << javascript_tag("OpenLayers.ImgPath='/images/OpenLayers/';")
+      html << javascript_tag("OpenLayers.ImgPath='"+  (ActionController::Base.relative_url_root||"") +"/"+img_path + "';")
       proxy = options.has_key?(:proxy) ? options[:proxy] : controller.controller_name
       html << javascript_tag("OpenLayers.ProxyHost='/#{proxy}/proxy?url=';")