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(+) at least it's drawing

This commit is contained in:
Francesco 2022-07-31 18:58:13 +02:00
parent f63e4697f1
commit e21fab1c49
2 changed files with 20 additions and 12 deletions
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30
src/Canvas.hs
View File

@ -1,11 +1,11 @@
module Canvas where module Canvas where
import Graphics.Gloss.Data.Picture ( Picture (Text), pictures, scale, translate ) import Graphics.Gloss.Data.Picture ( Picture (Text, Blank), pictures, scale, translate, rectangleSolid, circle )
import Graphics.Gloss.Interface.IO.Interact ( Event (EventKey, EventMotion), KeyState (Down, Up), Key (Char, MouseButton), MouseButton (LeftButton) ) import Graphics.Gloss.Interface.IO.Interact ( Event (EventKey, EventMotion), KeyState (Down, Up), Key (Char, MouseButton), MouseButton (LeftButton) )
type Dimension = (Int, Int) type Dimension = (Int, Int)
type Position = (Float, Float) type Position = (Float, Float)
type TipSize = Float type TipSize = Float
data Canvas = Canvas { data Canvas = Canvas {
items :: [Picture] items :: [Picture]
@ -17,28 +17,36 @@ data Canvas = Canvas {
data Mode = Brush | Eraser deriving (Eq, Show) data Mode = Brush | Eraser deriving (Eq, Show)
newtype Tip = Shape TipSize data Tip = Tip {
shape :: Shape
, size :: TipSize
}
data Shape = Rectangular | Circular data Shape = Rectangular | Circular
nextPicture :: Canvas -> Picture
nextPicture (Canvas _ Brush True position (Tip Rectangular size)) = uncurry translate position $ rectangleSolid size size
nextPicture (Canvas _ Brush True position (Tip Circular size)) = uncurry translate position $ circle size
nextPicture _ = Blank
windowSize :: Dimension windowSize :: Dimension
windowSize = (500, 500) windowSize = (500, 500)
leftCornerize :: Picture -> Picture leftCornerize :: Picture -> Picture
leftCornerize = translate (fromIntegral $ (-(fst windowSize)) `div` 2 + (fst windowSize `div` 10)) leftCornerize = translate (fromIntegral $ (-(fst windowSize)) `div` 2 + (fst windowSize `div` 10))
(fromIntegral $ (snd windowSize) `div` 2 - (snd windowSize `div` 10)) (fromIntegral $ (snd windowSize) `div` 2 - (snd windowSize `div` 10))
rightCornerize :: Picture -> Picture rightCornerize :: Picture -> Picture
rightCornerize = translate (fromIntegral $ (fst windowSize) `div` 2 - (fst windowSize `div` 5)) rightCornerize = translate (fromIntegral $ (fst windowSize) `div` 2 - (fst windowSize `div` 5))
(fromIntegral $ (snd windowSize) `div` 2 - (snd windowSize `div` 10)) (fromIntegral $ (snd windowSize) `div` 2 - (snd windowSize `div` 10))
showInfo :: Canvas -> Picture showInfo :: Canvas -> Picture
showInfo canv = leftCornerize showInfo canv = leftCornerize
$ scale 0.15 0.15 $ scale 0.15 0.15
$ Text ( show (mode canv) ++ " - " ++ show (pos canv)) $ Text ( show (mode canv) ++ " - " ++ show (pos canv))
render :: Canvas -> Picture render :: Canvas -> Picture
render canv = pictures ( showInfo canv : items canv ) render canv = pictures ( showInfo canv : items canv )
handle :: Event -> Canvas -> Canvas handle :: Event -> Canvas -> Canvas
handle (EventKey (Char 'b') Down _ _ ) canv = canv { mode = Brush } handle (EventKey (Char 'b') Down _ _ ) canv = canv { mode = Brush }
@ -49,5 +57,5 @@ handle (EventMotion (x, y)) canv = canv { pos = (x, y)}
handle _ canv = canv handle _ canv = canv
update :: Float -> Canvas -> Canvas update :: Float -> Canvas -> Canvas
update _ canv = canv update _ canv = canv { items = nextPicture canv : items canv }

2
src/Costants.hs
View File

@ -16,5 +16,5 @@ initial = Canvas {
, mode = Brush , mode = Brush
, drawing = False , drawing = False
, pos = (0, 0) , pos = (0, 0)
, tip = Rectangular 3 , tip = Tip Rectangular 3
} }