Add a unified Graphics.Config datatype

Graphics/Config.hs

@@ -0,0 +1,12 @@
+module Graphics.Config where
+
+import FRP.Yampa (Time)
+import GOL.Rule (Rule)
+import Graphics.Gloss (Color)
+
+data Config = Config
+  { cellColor :: Color,
+    rule :: Rule,
+    tickRate :: Time,
+    windowSize :: (Int, Int)
+  }

Graphics/Display.hs

@@ -6,6 +6,7 @@ module Graphics.Display where
 import Control.Monad.Representable.Reader
 import Data.Maybe (mapMaybe)
 import GOL.Space
+import Graphics.Config
 import Graphics.Gloss
 
 -- * Drawing the display grid
@@ -27,7 +28,8 @@ drawCells xs size =
   let poss = (,) <$> [0 .. sizex @f -1] <*> [0 .. sizey @f -1]
    in mapMaybe (\pos -> drawCell xs pos size) poss
 
-drawGrid :: forall f. DisplayableSpace f => f Bool -> (Int, Int) -> Picture
+drawGrid :: forall f. DisplayableSpace f => Config -> f Bool -> Picture
-drawGrid xs (w, h) =
+drawGrid config xs =
-  let size = fromIntegral $ if w > h then h `div` sizey @f else w `div` sizex @f
+  let (w, h) = windowSize config
-   in color white $ pictures $ drawCells xs size
+      size = fromIntegral $ if w > h then h `div` sizey @f else w `div` sizex @f
+   in color (cellColor config) $ pictures $ drawCells xs size

conways-game-of-life.cabal

@@ -12,6 +12,7 @@ executable main
                   GOL.Space,
                   GOL.Engine,
                   Graphics.GlossUtils,
+                  Graphics.Config,
                   Graphics.Engine,
                   Graphics.Display
   build-depends:  base,