Prevents duplicate widget event notifications

Author: tsantef

javascripts/dashing.coffee

@@ -100,12 +100,13 @@ source.addEventListener 'error', (e)->
 
 source.addEventListener 'message', (e) =>
   data = JSON.parse(e.data)
-  if Dashing.debugMode
-    console.log("Received data for #{data.id}", data)
-  lastEvents[data.id] = data
-  if widgets[data.id]?.length > 0
-    for widget in widgets[data.id]
-      widget.receiveData(data)
+  if lastEvents[data.id]?.updatedAt != data.updatedAt
+    if Dashing.debugMode
+      console.log("Received data for #{data.id}", data)
+    lastEvents[data.id] = data
+    if widgets[data.id]?.length > 0
+      for widget in widgets[data.id]
+        widget.receiveData(data)
 
 
 $(document).ready ->