X-Git-Url: https://git.stderr.nl/gitweb?a=blobdiff_plain;f=FPPrac.hs;h=5da734e98aebb4e9917f06b3f444a4d2f1b48afc;hb=6d9c1802434e999d6b72fcb18a55cede313714f7;hp=79a6a0ac9405b167d0c76b931c9292bdc49462c4;hpb=ea597e505a69974dfd35dd2728b1e9f3bb109fa9;p=matthijs%2Fprojects%2Ffpprac.git

diff --git a/FPPrac.hs b/FPPrac.hs
index 79a6a0a..5da734e 100644
--- a/FPPrac.hs
+++ b/FPPrac.hs
@@ -30,13 +30,14 @@ data Rect = Rect
 
 data Point = Point !Int !Int deriving (Show, Eq)
 
-type Color = Gtk.Color
+-- A color, with RGB values from 0 to 1
+data Color = Color Double Double Double deriving (Show, Eq)
 
 -- Create a Color from Red, Green and Blue values. The inputs should be
 -- between 0 and 255 (inclusive).
 rgb :: Int -> Int -> Int -> Color
-rgb r g b = Gtk.Color (conv r) (conv g) (conv b)
-	where conv = fromInteger . toInteger . (*256)
+rgb r g b = Color (conv r) (conv g) (conv b)
+	where conv = (/256) . fromIntegral
 
 -- | Some predefined colours
 red = rgb 0xff 0 0
@@ -166,10 +167,14 @@ runGUI w h (IS { .. }) = do
 
 	-- Repack state
 	let state = IS { .. }
-		
+	
+	-- Process any initial requests
+	processPostponed state
+
 	-- Show the window and start the Gtk mainloop.
 	Gtk.widgetShowAll window
 	Gtk.mainGUI
+	
 
 -- | Copy the given surface to the exposed window on an expose event.
 onExpose :: IORef Cairo.Surface -> EventM.EventM EventM.EExpose Bool
@@ -256,6 +261,13 @@ winHandler s@IS {..} (WinMenu      ms) = Just $ mkMenu >>= \ms' -> sFrame `set`
 -}
 winHandler _        _                = Nothing
 
+gfxHandler s req = case gfxHandler' req of
+	Nothing -> Nothing
+	Just render -> Just $ do
+		buf <- readIORef (buffer s)
+		Cairo.renderWith buf render
+		Gtk.widgetQueueDraw (window s)
+		
 {-
 gfxHandler IS {..} (GfxLines     col ps)    = Just $ polyline buffer ps [penColor := col] >> dirtyPts sPanel ps
 gfxHandler IS {..} (GfxPolygon   col ps)    = Just $ polygon  buffer ps [penColor := col, brushColor := col] >> dirtyPts sPanel ps
@@ -264,10 +276,21 @@ gfxHandler IS {..} (GfxRectangle col rt)    = Just $ drawRect buffer rt [penColo
 gfxHandler IS {..} (GfxEllipse   col rt)    = Just $ ellipse buffer rt [penColor := col, brushKind := BrushTransparent] >> dirtyRect sPanel rt
 gfxHandler IS {..} (GfxDisc      col rt)    = Just $ ellipse buffer rt [penColor := col, brushColor := col] >> dirtyRect sPanel rt
 gfxHandler IS {..} (GfxFont      st  sz)    = Just $ buffer `set` [ fontSize := sz, fontFace := st ]
-gfxHandler IS {..}  GfxClear                = Just $ dcClear buffer >> windowRefresh sPanel False
 gfxHandler IS {..} (GfxPicture   fd  pt)    = Just $ bitmapCreateFromFile fd >>= \bm -> drawBitmap buffer bm pt False [] >> bitmapGetSize bm >>= dirtyRect' sPanel pt
 -}
-gfxHandler _        _                       = Nothing
+gfxHandler' (GfxText col (Point x y) st) = Just $ do
+	setSourceColor col
+	Cairo.moveTo (fromIntegral x) (fromIntegral y)
+	Cairo.showText st 
+gfxHandler' GfxClear = Just $ do
+	Cairo.setSourceRGB 1 1 1
+	Cairo.paint
+gfxHandler' _ = Nothing
+
+-- | Sets the source to a pattern fill of the given color
+setSourceColor :: Color -> Cairo.Render ()
+setSourceColor (Color r g b) =
+	Cairo.setSourceRGB r g b
 
 {-
 dirtyPts :: Window a -> [Point] -> IO ()