#5 Render inventory when pressing i

README.md

@@ -51,12 +51,13 @@ This README serves as both documentation and project report, so excuse the detai
 
 These are the keybinds *in* the game. All other keybinds in the menus should be straightforward.
 
-| Action     | Primary       | Secondary   |
-| ---------- | ------------- | ----------- |
-| Move up    | `Arrow Up`    | `w`         |
-| Move left  | `Arrow Left`  | `a`         |
-| Move down  | `Arrow Down`  | `s`         |
-| Move right | `Arrow Right` | `d`         |
+| Action         | Primary       | Secondary   |
+| -------------- | ------------- | ----------- |
+| Move up        | `Arrow Up`    | `w`         |
+| Move left      | `Arrow Left`  | `a`         |
+| Move down      | `Arrow Down`  | `s`         |
+| Move right     | `Arrow Right` | `d`         |
+| Show inventory | `i`           |             |
 
 ### Example playthrough
 

lib/RPGEngine/Config.hs

@@ -23,6 +23,10 @@ bgColor = white
 zoom :: Float
 zoom = 5.0
 
+-- UI scale
+uizoom :: Float
+uizoom = 0.5
+
 -- Resolution of the texture
 resolution :: Float
 resolution = 16

lib/RPGEngine/Data.hs

@@ -99,9 +99,11 @@ data Direction = North
                deriving (Eq, Show)
 
 data Player = Player {
-    playerHp  :: HP,
-    inventory :: [Item],
-    position  :: (X, Y)
+    playerHp      :: HP,
+    inventory     :: [Item],
+    position      :: (X, Y),
+    showHp        :: Bool,
+    showInventory :: Bool
 } deriving (Eq, Show)
 
 ------------------------------ Condition -----------------------------

lib/RPGEngine/Input/Core.hs

@@ -32,16 +32,16 @@ composeInputHandlers (ih:ihs) ev a = composeInputHandlers ihs ev (ih ev a)
 
 -- Handle any event
 handle :: Event -> (a -> a) -> InputHandler a
-handle (EventKey key _ _ _) = handleKey key
+handle (EventKey key state _ _) = handleKey key state
 -- handle (EventMotion _)      = undefined -- TODO
 -- handle (EventResize _)      = undefined -- TODO
-handle _                    = const (const id)
+handle _                        = const (const id)
 
 -- Handle a event by pressing a key
-handleKey :: Key -> (a -> a) -> InputHandler a
-handleKey (SpecialKey  sk) = handleSpecialKey sk
-handleKey (Char        c ) = handleCharKey c
-handleKey (MouseButton _ ) = const (const id)
+handleKey :: Key -> KeyState -> (a -> a) -> InputHandler a
+handleKey (SpecialKey  sk) s = handleSpecialKey sk s
+handleKey (Char        c ) s = handleCharKey c s
+handleKey (MouseButton _ ) _ = const (const id)
 
 -- Handle any key, equivalent to "Press any key to start"
 handleAnyKey :: (a -> a) -> InputHandler a
@@ -50,14 +50,14 @@ handleAnyKey _ _                     = id
 
 --------------------------- Help functions ---------------------------
 
-handleCharKey :: Char -> (a -> a) -> InputHandler a
-handleCharKey c1 f (EventKey (Char c2) Down _ _)
-    | c1 == c2  = f
-    | otherwise = id
-handleCharKey _  _ _ = id
+handleCharKey :: Char -> KeyState -> (a -> a) -> InputHandler a
+handleCharKey c1 s1 f (EventKey (Char c2) s2 _ _)
+    | c1 == c2 && s1 == s2 = f
+    | otherwise            = id
+handleCharKey _  _ _ _ = id
 
-handleSpecialKey :: SpecialKey -> (a -> a) -> InputHandler a
-handleSpecialKey sk1 f (EventKey (SpecialKey sk2) Down _ _)
-    | sk1 == sk2 = f
+handleSpecialKey :: SpecialKey -> KeyState -> (a -> a) -> InputHandler a
+handleSpecialKey sk1 s1 f (EventKey (SpecialKey sk2) s2 _ _)
+    | sk1 == sk2 && s1 == s2 = f
     | otherwise  = id
-handleSpecialKey _   _ _ = id
+handleSpecialKey _   _ _ _ = id

lib/RPGEngine/Input/LevelSelection.hs

@@ -6,7 +6,7 @@ import RPGEngine.Input.Core (InputHandler, composeInputHandlers, handleKey, List
 
 import RPGEngine.Data (Game (..), State (..), Direction (..))
 import Graphics.Gloss.Interface.IO.Game (Key(..))
-import Graphics.Gloss.Interface.IO.Interact (SpecialKey(..))
+import Graphics.Gloss.Interface.IO.Interact (SpecialKey(..), KeyState(..))
 import RPGEngine.Config (levelFolder)
 import RPGEngine.Parse (parse)
 
@@ -14,10 +14,10 @@ import RPGEngine.Parse (parse)
 
 handleInputLevelSelection :: InputHandler Game
 handleInputLevelSelection = composeInputHandlers [
-    handleKey (SpecialKey KeySpace) selectLevel,
+    handleKey (SpecialKey KeySpace) Down selectLevel,
 
-    handleKey (SpecialKey KeyUp)   $ moveSelector North,
-    handleKey (SpecialKey KeyDown) $ moveSelector South
+    handleKey (SpecialKey KeyUp)   Down $ moveSelector North,
+    handleKey (SpecialKey KeyDown) Down $ moveSelector South
     ]
 
 ----------------------------------------------------------------------

lib/RPGEngine/Input/Playing.hs

@@ -4,32 +4,36 @@ module RPGEngine.Input.Playing
 , spawnPlayer
 ) where
 
-import RPGEngine.Input.Core (InputHandler, handleKey, composeInputHandlers)
+import RPGEngine.Input.Core (InputHandler, handle, handleKey, composeInputHandlers)
 
 import RPGEngine.Data (Game (..), Layout(..), Level(..), Physical(..), Player(..), State(..), X, Y, Direction (..))
 import RPGEngine.Data.Game (isLegalMove, isPlayerDead, isPlayerAtExit)
 import RPGEngine.Data.Level (directionOffsets, findFirstOf)
+
 import Data.Maybe (fromJust, isNothing)
 import Graphics.Gloss.Interface.IO.Game (Key(..))
-import Graphics.Gloss.Interface.IO.Interact (SpecialKey(..))
+import Graphics.Gloss.Interface.IO.Interact (SpecialKey(..), KeyState(..), Event(..), KeyState(..))
 
 ------------------------------ Exported ------------------------------
 
 handleInputPlaying :: InputHandler Game
 handleInputPlaying = composeInputHandlers [
     -- Pause the game
-    handleKey (Char 'p') pauseGame,
+    handleKey (Char 'p') Down pauseGame,
 
     -- Player movement
-    handleKey (SpecialKey KeyUp)    $ movePlayer North,
-    handleKey (SpecialKey KeyRight) $ movePlayer East,
-    handleKey (SpecialKey KeyDown)  $ movePlayer South,
-    handleKey (SpecialKey KeyLeft)  $ movePlayer West,
+    handleKey (SpecialKey KeyUp)    Down $ movePlayer North,
+    handleKey (SpecialKey KeyRight) Down $ movePlayer East,
+    handleKey (SpecialKey KeyDown)  Down $ movePlayer South,
+    handleKey (SpecialKey KeyLeft)  Down $ movePlayer West,
 
-    handleKey (Char 'w') $ movePlayer North,
-    handleKey (Char 'd') $ movePlayer East,
-    handleKey (Char 's') $ movePlayer South,
-    handleKey (Char 'a') $ movePlayer West
+    handleKey (Char 'w') Down $ movePlayer North,
+    handleKey (Char 'd') Down $ movePlayer East,
+    handleKey (Char 's') Down $ movePlayer South,
+    handleKey (Char 'a') Down $ movePlayer West,
+
+    handleKey (Char 'i') Down $ toggleInventoryShown True,
+    handleKey (Char 'i') Up   $ toggleInventoryShown False
     ]
 
 ----------------------------------------------------------------------
@@ -76,6 +80,12 @@ movePlayer dir g@Game{ state = s@Playing{ player = p@Player{ position = (x, y) }
           (xD, yD)  = directionOffsets dir
 movePlayer _ g = g
 
+toggleInventoryShown :: Bool -> Game -> Game
+toggleInventoryShown shown g@Game{ state = s@Playing{ player = p }}= newGame
+    where newGame   = g{ state  = newState     }
+          newState  = s{ player = newPlayer    }
+          newPlayer = p{ showInventory = shown }
+
 -- Map all Physicals onto coordinates
 putCoords :: Level -> [(X, Y, Physical)]
 putCoords l@Level{ layout = lay } = concatMap (\(a, bs) -> map (\(b, c) -> (b, a, c)) bs) numberedList

lib/RPGEngine/Render.hs

@@ -32,5 +32,4 @@ render Game{ state = s@LevelSelection{} } = renderLevelSelection s
 render Game{ state = s@Playing{}        } = renderPlaying s
 render Game{ state = s@Paused{}         } = renderPaused s
 render Game{ state = s@Win              } = renderWin s
-render Game{ state = s@Lose{}           } = renderLose s
-render _ = blank
+render Game{ state = s@Lose{}           } = renderLose s

lib/RPGEngine/Render/LevelSelection.hs

@@ -4,7 +4,7 @@ module RPGEngine.Render.LevelSelection
 
 import RPGEngine.Render.Core (Renderer)
 
-import RPGEngine.Config (resolution, zoom)
+import RPGEngine.Config (resolution, zoom, uizoom)
 import RPGEngine.Data (State (..))
 
 import Graphics.Gloss ( pictures, color, text, translate, blank )
@@ -25,8 +25,7 @@ renderLevelList LevelSelection{ levelList = list, selector = selector } = everyt
     where everything       = pictures $ map render entries
           sel              = selection selector
           entries          = zip [0::Int .. ] list
-          render (i, path) | i == sel  = color red $ scale zoomed zoomed $ translate 0 (offset i) $ text path
-                           | otherwise = scale zoomed zoomed $ translate 0 (offset i) $ text path
-          zoomed           = 0.1 * zoom
-          offset i         = negate (2 * resolution * zoom * fromIntegral i)
+          render (i, path) | i == sel  = color red $ scale uizoom uizoom $ translate 0 (offset i) $ text path
+                           | otherwise = scale uizoom uizoom $ translate 0 (offset i) $ text path
+          offset i         = negate (250 * uizoom * fromIntegral i)
 renderLevelList _ = blank

lib/RPGEngine/Render/Playing.hs

@@ -2,20 +2,21 @@ module RPGEngine.Render.Playing
 ( renderPlaying
 ) where
 
-import RPGEngine.Render.Core (Renderer, getRender, setRenderPos)
+import RPGEngine.Render.Core (Renderer, getRender, setRenderPos, overlay)
 
-import RPGEngine.Config (resolution, zoom)
+import RPGEngine.Config (resolution, zoom, uizoom)
 import RPGEngine.Data (State(..), Player (..), Game (..), Level (..), Layout, Physical (..), Item (..), Entity (..))
 
-import Graphics.Gloss ( pictures, Picture, translate )
-import Graphics.Gloss.Data.Picture (blank)
+import Graphics.Gloss ( pictures, Picture, translate, white )
+import Graphics.Gloss.Data.Picture ( blank, text, color, scale )
 
 ------------------------------ Exported ------------------------------
 
 renderPlaying :: Renderer State
 renderPlaying Playing { level = lvl, player = player } = pictures [
     renderLevel lvl,
-    renderPlayer player
+    renderPlayer player,
+    renderInventory player
     ]
 renderPlaying _ = blank
 
@@ -83,4 +84,12 @@ renderEntities list = pictures $ map renderEntity list
 
 renderEntity :: Entity -> Picture
 renderEntity Entity{ entityId = id, entityX = x, entityY = y} = setRenderPos x y image
-    where image = getRender id
+    where image = getRender id
+
+renderInventory :: Player -> Picture
+renderInventory Player{ showInventory = False } = blank
+renderInventory Player{ inventory = list } = pictures [overlay, title, items]
+    where title = translate 0 (offset (-1)) $ scale uizoom uizoom $ color white $ text "Inventory"
+          items = pictures $ map move $ zip [0::Int ..] (map (getRender . itemId) list)
+          move (i, pic) = translate 0 (offset i) pic
+          offset i      = negate (zoom * resolution * fromIntegral i)