color reactor coolant bars based on coolant type

graphics/element.lua

@@ -363,6 +363,12 @@ function element.new(args)
         protected.disable()
     end
 
+    -- custom recolor command, varies by element if implemented
+    ---@vararg cpair|color color(s)
+    function public.recolor(...)
+        protected.recolor(...)
+    end
+
     -- resize attributes of the element value if supported
     ---@vararg number dimensions (element specific)
     function public.resize(...)

graphics/elements/indicators/hbar.lua

@@ -106,7 +106,9 @@ local function hbar(args)
 
         -- re-draw
         last_num_bars = 0
-        e.on_update(e.value)
+        if type(e.value) == "number" then
+            e.on_update(e.value)
+        end
     end
 
     -- set the percentage value

graphics/elements/indicators/vbar.lua

@@ -89,7 +89,9 @@ local function vbar(args)
 
         -- re-draw
         last_num_bars = 0
-        e.on_update(e.value)
+        if type(e.value) == "number" then
+            e.on_update(e.value)
+        end
     end
 
     -- set the percentage value