Sleep loot cursor updates between changes

mods/loot-cursor.lua

@@ -12,27 +12,53 @@ local module = ShaguTweaks:register({
 
 module.enable = function(self)
   local loot = CreateFrame("Frame", "ShaguTweaksLoot", LootFrame)
+  local buttons = {}
+
+  for i = 1, LOOTFRAME_NUMBUTTONS do
+    buttons[i] = getglobal("LootButton"..i)
+  end
+
+  loot:RegisterEvent("LOOT_OPENED")
+  loot:RegisterEvent("LOOT_SLOT_CLEARED")
+  loot:RegisterEvent("LOOT_CLOSED")
+
+  loot:SetScript("OnEvent", function()
+    if event == "LOOT_OPENED" then
+      loot.last_button = nil
+      loot:Show()
+    elseif event == "LOOT_SLOT_CLEARED" then
+      loot:Show()
+    else
+      loot:Hide()
+    end
+  end)
 
   loot:SetScript("OnUpdate", function()
-    if GetNumLootItems() == 0 then HideUIPanel(LootFrame) return end
-    local x, y = GetCursorPosition()
-    local s = LootFrame:GetEffectiveScale()
-    x, y = x / s, y / s
+    if GetNumLootItems() == 0 then
+      loot:Hide()
+      HideUIPanel(LootFrame)
+      return
+    end
+
     for i = 1, LOOTFRAME_NUMBUTTONS do
-      local button = getglobal("LootButton"..i)
+      local button = buttons[i]
       if button:IsVisible() then
         if loot.last_button ~= button then
+          local x, y = GetCursorPosition()
+          local s = LootFrame:GetEffectiveScale()
           local button_offset = (i-1) * button:GetHeight()
+          x, y = x / s, y / s
           LootFrame:ClearAllPoints()
           LootFrame:SetPoint("TOPLEFT", UIParent, "BOTTOMLEFT", x - 40, y + 100 + button_offset)
           loot.last_button = button
         end
+        loot:Hide()
         return
       end
     end
   end)
 
-  loot:SetScript("OnShow", function()
-    loot.last_button = nil
-  end)
+  -- Stay fully dormant between loot changes. If LootFrame has not populated
+  -- its buttons yet, OnUpdate remains active until the first one appears.
+  loot:Hide()
 end