Use ALT + Enter to toggle fullscreen

3 files changed, 30 insertions, 3 deletions

diff --git a/README.md b/README.md
index 4634ae4..9cbc2d9 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,21 @@ Using cabal:
 ```
 cabal run game
 ```
+
+# Controls
+
+The game supports both keyboard and gamepads.
+
+| Keyboard | Gamepad | Effect |
+| --- | --- | --- |
+| Cursor left | Dpad left | Move left |
+| Cursor right | Dpad right | Move right |
+| z | Button a | Jump |
+| Cursor down + z | Dpad down + Button a | Drop one plaform down |
+
+ESC will exit the game.  
+ALT + Enter will toggle between full-screen and windowed mode.
+
 ## Author
 
 This was made by [Juan J. Martinez](https://www.usebox.net/jjm/about/me/).
diff --git a/src/Game.hs b/src/Game.hs
index 2f9988d..52ba6a7 100644
--- a/src/Game.hs
+++ b/src/Game.hs
@@ -134,8 +134,11 @@ gameLoop :: Env -> IO ()
 gameLoop e = do
   events <- map SDL.eventPayload <$> SDL.pollEvents
 
-  -- F11 for fullscreen / windowed
-  env <- if fromMaybe False $ C.isPressed SDL.KeycodeF11 events then toggleFullscreen e else pure e
+  -- ALT + Enter for fullscreen / windowed
+  env <-
+    if fromMaybe False (C.isPressed SDL.KeycodeReturn events) && C.isModKey C.altMod events
+      then toggleFullscreen e
+      else pure e
 
   let renderer = env.renderer
       canvas = env.canvas
diff --git a/src/Game/Controller.hs b/src/Game/Controller.hs
index 01dfd1b..d47963e 100644
--- a/src/Game/Controller.hs
+++ b/src/Game/Controller.hs
@@ -1,4 +1,4 @@
-module Game.Controller (Controls (..), init, update, isPressed) where
+module Game.Controller (Controls (..), init, update, isPressed, isModKey, altMod) where
 
 import Control.Monad
 import Data.Int (Int32)
@@ -48,6 +48,9 @@ processControllerEvents controls [] = pure controls
 init :: Controls
 init = Controls False False False False False False False Nothing Nothing
 
+altMod :: SDL.KeyModifier
+altMod = SDL.KeyModifier False False False False True False False False False False False
+
 updateGamepad :: Controls -> [SDL.EventPayload] -> Controls
 updateGamepad controls events =
   case controls.joyId of
@@ -92,6 +95,12 @@ isPressed code events
     isEventKey expected keycode (SDL.KeyboardEvent (SDL.KeyboardEventData _ motion False ksym)) = expected == motion && SDL.keysymKeycode ksym == keycode
     isEventKey _ _ _ = False
 
+isModKey :: SDL.KeyModifier -> [SDL.EventPayload] -> Bool
+isModKey kmod = any (isModKeyOne kmod)
+  where
+    isModKeyOne m (SDL.KeyboardEvent (SDL.KeyboardEventData _ _ _ ksym)) = SDL.keysymModifier ksym == m
+    isModKeyOne _ _ = False
+
 isPressedGamepad :: Int32 -> SDL.ControllerButton -> [SDL.EventPayload] -> Maybe Bool
 isPressedGamepad joyId button events
   | any (isEventButton SDL.ControllerButtonPressed button) events = Just True