Fix #4923 (#4981)

src/states_screens/dialogs/addons_loading.cpp

@@ -18,10 +18,12 @@
 
 #include "states_screens/dialogs/addons_loading.hpp"
 
+#include "audio/sfx_manager.hpp"
 #include "addons/addons_manager.hpp"
 #include "config/player_manager.hpp"
 #include "config/user_config.hpp"
 #include "guiengine/engine.hpp"
+#include "guiengine/message_queue.hpp"
 #include "guiengine/scalable_font.hpp"
 #include "guiengine/widgets.hpp"
 #include "input/input_manager.hpp"
@@ -55,7 +57,7 @@ AddonsLoading::AddonsLoading(const std::string &id)
              , m_addon(*(addons_manager->getAddon(id)) )
 #endif
 {
-    
+    m_message_shown    = false;
     m_icon_shown       = false;
 #ifdef SERVER_ONLY
     m_icon_downloaded  = std::make_shared<bool>(false);
@@ -279,6 +281,16 @@ void AddonsLoading::voteClicked()
         dismiss();
         new VoteDialog(addon_id);
     }
+    else
+    {
+        SFXManager::get()->quickSound("anvil");
+        if (!m_message_shown)
+        {
+            MessageQueue::add(MessageQueue::MT_ERROR,
+                _("You must be logged in to rate this addon."));
+            m_message_shown = true;
+        }
+    }
 #endif
 }   // voteClicked
 

src/states_screens/dialogs/addons_loading.hpp

@@ -51,6 +51,8 @@ private:
 
     /** True if the icon is being displayed. */
     bool m_icon_shown;
+    /** True if the error message has shown once. */
+    bool m_message_shown;
 
     std::shared_ptr<bool> m_icon_downloaded;
     /** A pointer to the download request, which gives access