UI changes for grid

1 files changed, 42 insertions, 14 deletions

diff --git a/src/Chelleport/View.hs b/src/Chelleport/View.hs
index c02e704..2ac90a7 100644
--- a/src/Chelleport/View.hs
+++ b/src/Chelleport/View.hs
@@ -3,39 +3,43 @@ module Chelleport.View (render) where
 import Chelleport.Draw
 import Chelleport.Types
 import Chelleport.Utils (intToCInt, isEmpty, isNotEmpty)
-import Control.Monad (forM_, unless, void)
+import Control.Monad (forM_, unless, void, when)
 import Data.IORef (modifyIORef', newIORef, readIORef)
 import Data.List (isPrefixOf)
 import qualified Data.Text as Text
+import qualified Data.Vector.Storable as Vector
 import Foreign.C (CInt)
 import SDL (($=))
 import qualified SDL
+import Data.Maybe (isJust)
 
 render :: State -> DrawContext -> IO ()
 render state ctx = do
   renderGridLines state ctx
 
   (SDL.V2 width height) <- windowSize ctx
-  let grid = stateCells state
+  let grid = stateGrid state
   let wcell = width `div` intToCInt (length $ head grid)
   let hcell = height `div` intToCInt (length grid)
 
   forM_ (zip [0 ..] grid) $ \(rowIndex, row) -> do
     forM_ (zip [0 ..] row) $ \(colIndex, cell) -> do
-      let py = rowIndex * hcell
-      let px = colIndex * wcell
-      renderKeySequence ctx (stateKeySequence state) cell (px, py)
+      let py = rowIndex * hcell + 10
+      let px = colIndex * wcell + wcell `div` 2 - 20
+      visible <- renderKeySequence ctx (stateKeySequence state) cell (px, py)
+      when visible $ do
+        renderTargetPoint ctx (colIndex * wcell + wcell `div` 2, rowIndex * hcell + hcell `div` 2)
 
-renderKeySequence :: DrawContext -> KeySequence -> Cell -> (CInt, CInt) -> IO ()
+renderKeySequence :: DrawContext -> KeySequence -> Cell -> (CInt, CInt) -> IO Bool
 renderKeySequence ctx keySequence cell (px, py) = do
   let (matched, remaining)
         | keySequence `isPrefixOf` cell = splitAt (length keySequence) cell
         | otherwise = ("", cell)
 
   let textColor
-        | isEmpty keySequence = colorWhite
-        | isNotEmpty matched = colorHighlight
-        | otherwise = colorGray
+        | isEmpty keySequence = Just colorWhite
+        | isNotEmpty matched = Just colorHighlight
+        | otherwise = Nothing
 
   widthRef <- newIORef 0
   unless (isEmpty matched) $ do
@@ -43,25 +47,49 @@ renderKeySequence ctx keySequence cell (px, py) = do
     modifyIORef' widthRef (const textWidth)
 
   unless (isEmpty remaining) $ do
-    prevTextWidth <- readIORef widthRef
-    let pos = px + prevTextWidth
-    void $ drawText ctx (SDL.V2 pos py) textColor $ Text.pack remaining
+    case textColor of
+      Just color -> do
+        prevTextWidth <- readIORef widthRef
+        let pos = px + prevTextWidth
+        void $ drawText ctx (SDL.V2 pos py) color $ Text.pack remaining
+      Nothing -> pure ()
+
+  pure (isJust textColor)
 
 renderGridLines :: State -> DrawContext -> IO ()
 renderGridLines state ctx@(DrawContext {ctxRenderer = renderer}) = do
   (SDL.V2 width height) <- windowSize ctx
-  let grid = stateCells state
+  let grid = stateGrid state
   let wcell = width `div` intToCInt (length $ head grid)
   let hcell = height `div` intToCInt (length grid)
 
-  SDL.rendererDrawColor renderer $= colorGridLines
   let rows = intToCInt $ length grid
   let columns = intToCInt $ length $ head grid
   forM_ [0 .. rows] $ \rowIndex -> do
+    SDL.rendererDrawColor renderer $= colorGray
+    drawHorizontalLine ctx (rowIndex * hcell + hcell `div` 2)
+    SDL.rendererDrawColor renderer $= colorGridLines
     drawHorizontalLine ctx $ rowIndex * hcell
   forM_ [0 .. columns] $ \colIndex -> do
+    SDL.rendererDrawColor renderer $= colorGray
+    drawVerticalLine ctx (colIndex * wcell + wcell `div` 2)
+    SDL.rendererDrawColor renderer $= colorGridLines
     drawVerticalLine ctx $ colIndex * wcell
 
   SDL.rendererDrawColor renderer $= colorAxisLines
   drawHorizontalLine ctx (rows * hcell `div` 2)
   drawVerticalLine ctx (columns * wcell `div` 2)
+
+renderTargetPoint :: DrawContext -> (CInt, CInt) -> IO ()
+renderTargetPoint (DrawContext {ctxRenderer = renderer}) (x, y) = do
+  let renderedPoints = 16
+  let radius = 2.0 :: Double
+  let toTheta n = fromIntegral n * (2 * pi) / fromIntegral renderedPoints
+      toPointOnCircle n =
+        SDL.V2
+          (x + round (radius * cos (toTheta n)))
+          (y + round (radius * sin (toTheta n)))
+  let points = Vector.generate renderedPoints (SDL.P . toPointOnCircle)
+  SDL.rendererDrawColor renderer $= colorWhite
+  SDL.drawPoints renderer points
+  pure ()