From b59b57f67e3d04f45887c088d21e6ae33670a716 Mon Sep 17 00:00:00 2001
From: Paul Chote <pchote@users.noreply.github.com>
Date: Tue, 14 Jun 2016 20:10:57 +0100
Subject: [PATCH] Hide checkboxes if no matching trait exists.

---
 OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyLogic.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyLogic.cs b/OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyLogic.cs
index 182f09c3f5..c8e203e1aa 100644
--- a/OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyLogic.cs
+++ b/OpenRA.Mods.Common/Widgets/Logic/Lobby/LobbyLogic.cs
@@ -355,6 +355,10 @@ namespace OpenRA.Mods.Common.Widgets.Logic
 					var option = new CachedTransform<Session.Global, Session.LobbyOptionState>(
 						gs => gs.LobbyOptions[kv.Value]);
 
+					var visible = new CachedTransform<Session.Global, bool>(
+						gs => gs.LobbyOptions.ContainsKey(kv.Value));
+
+					checkbox.IsVisible = () => visible.Update(orderManager.LobbyInfo.GlobalSettings);
 					checkbox.IsChecked = () => option.Update(orderManager.LobbyInfo.GlobalSettings).Enabled;
 					checkbox.IsDisabled = () => configurationDisabled() ||
 						option.Update(orderManager.LobbyInfo.GlobalSettings).Locked;