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6d9c180
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Add some comments and type signatures.
author
Matthijs Kooijman
<matthijs@stdin.nl>
Mon, 24 Aug 2009 19:20:23 +0000
(21:20 +0200)
committer
Matthijs Kooijman
<matthijs@stdin.nl>
Mon, 24 Aug 2009 19:20:23 +0000
(21:20 +0200)
FPPrac.hs
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diff --git
a/FPPrac.hs
b/FPPrac.hs
index 5da734e98aebb4e9917f06b3f444a4d2f1b48afc..14e8c4f872036b122449cf12242e3338936520c5 100644
(file)
--- a/
FPPrac.hs
+++ b/
FPPrac.hs
@@
-236,6
+236,8
@@
transKey _ _ = return ()
-}
-}
+-- | Handlers for various requests.
+miscHandler, winHandler, gfxHandler :: IState -> Request -> Maybe (IO ())
{-
miscHandler s@IS {..} (FRead fn ) = Just $ readFile fn >>= post s . FileContents fn
miscHandler IS {..} (FWrite fn cnts) = Just $ writeFile fn cnts
{-
miscHandler s@IS {..} (FRead fn ) = Just $ readFile fn >>= post s . FileContents fn
miscHandler IS {..} (FWrite fn cnts) = Just $ writeFile fn cnts
@@
-278,11
+280,16
@@
gfxHandler IS {..} (GfxDisc col rt) = Just $ ellipse buffer rt [penColor
gfxHandler IS {..} (GfxFont st sz) = Just $ buffer `set` [ fontSize := sz, fontFace := st ]
gfxHandler IS {..} (GfxPicture fd pt) = Just $ bitmapCreateFromFile fd >>= \bm -> drawBitmap buffer bm pt False [] >> bitmapGetSize bm >>= dirtyRect' sPanel pt
-}
gfxHandler IS {..} (GfxFont st sz) = Just $ buffer `set` [ fontSize := sz, fontFace := st ]
gfxHandler IS {..} (GfxPicture fd pt) = Just $ bitmapCreateFromFile fd >>= \bm -> drawBitmap buffer bm pt False [] >> bitmapGetSize bm >>= dirtyRect' sPanel pt
-}
+-- | Helper function for gfxHanlder
+gfxHandler' :: Request -> Maybe (Cairo.Render ())
gfxHandler' (GfxText col (Point x y) st) = Just $ do
gfxHandler' (GfxText col (Point x y) st) = Just $ do
+ -- Set the source color, move to the requested position and draw the
+ -- text
setSourceColor col
Cairo.moveTo (fromIntegral x) (fromIntegral y)
Cairo.showText st
gfxHandler' GfxClear = Just $ do
setSourceColor col
Cairo.moveTo (fromIntegral x) (fromIntegral y)
Cairo.showText st
gfxHandler' GfxClear = Just $ do
+ -- Set the source to white and paint the entire surface with it
Cairo.setSourceRGB 1 1 1
Cairo.paint
gfxHandler' _ = Nothing
Cairo.setSourceRGB 1 1 1
Cairo.paint
gfxHandler' _ = Nothing