GF/src is now for 2.9, and the new sources are in src-3.0 - keep it this way until the release of GF 3

src-3.0/GF/Fudgets/EventF.hs

@@ -0,0 +1,51 @@
+----------------------------------------------------------------------
+-- |
+-- Module      : EventF
+-- Maintainer  : AR
+-- Stability   : (stable)
+-- Portability : (portable)
+--
+-- > CVS $Date: 2005/04/21 16:22:16 $ 
+-- > CVS $Author: bringert $
+-- > CVS $Revision: 1.4 $
+--
+-- (Description of the module)
+-----------------------------------------------------------------------------
+
+module GF.Fudgets.EventF where
+import AllFudgets
+
+-- | The first string is the name of the key (e.g., "Down" for the down arrow key)
+--
+-- The modifiers list shift, control and alt keys that were active while the
+-- key was pressed.
+--
+-- The last string is the text produced by the key (for keys that produce
+-- printable characters, empty for control keys).
+type KeyPress = ((String,[Modifiers]),String)
+
+keyboardF :: F i o -> F i (Either KeyPress o)
+keyboardF fud = idRightSP (concatMapSP post) >^^=< oeventF mask fud
+  where
+    post (KeyEvent {type'=Pressed,keySym=sym,state=mods,keyLookup=s}) =
+       [((sym,mods),s)]
+    post _ = []
+
+    mask = [KeyPressMask,
+            EnterWindowMask, LeaveWindowMask -- because of CTT implementation
+	   ]
+
+-- | Output events:
+oeventF em fud =  eventF em (idLeftF fud)
+
+-- | Feed events to argument fudget:
+eventF eventmask = serCompLeftToRightF . groupF startcmds eventK
+  where
+    startcmds = [XCmd $ ChangeWindowAttributes [CWEventMask eventmask],
+	         XCmd $ ConfigureWindow [CWBorderWidth 0]]
+    eventK = K $ mapFilterSP route
+      where route = message low high
+            low (XEvt event) = Just (High (Left event))
+	    low _ = Nothing
+	    high h = Just (High (Right h))
+