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authorSpencer Janssen <sjanssen@cse.unl.edu>2007-11-01 21:10:59 +0100
committerSpencer Janssen <sjanssen@cse.unl.edu>2007-11-01 21:10:59 +0100
commit4866f2e367dfcf22a9591231ba40948826a1b438 (patch)
tree7a245caee3f146826b267d773b7eaa80386a818e /MouseGestures.hs
parent47589e1913fb9530481caedb543978a30d4323ea (diff)
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------------------------------------------------------------------------------
--- |
--- Module : XMonadContrib.MouseGestures
--- Copyright : (c) Lukas Mai
--- License : BSD3-style (see LICENSE)
---
--- Maintainer : <l.mai@web.de>
--- Stability : unstable
--- Portability : unportable
---
--- Support for simple mouse gestures
---
------------------------------------------------------------------------------
-
-module XMonadContrib.MouseGestures (
- -- * Usage
- -- $usage
- Direction(..),
- mouseGesture
-) where
-
-import XMonad
-import XMonad.Operations
-import Graphics.X11.Xlib
-import Graphics.X11.Xlib.Extras
-
-import Control.Monad.Reader
-import Data.IORef
-import qualified Data.Map as M
-import Data.Map (Map)
-
-import System.IO
-
--- $usage
--- In your Config.hs:
---
--- > import XMonadContrib.MouseGestures
--- > ...
--- > mouseBindings = M.fromList $
--- > [ ...
--- > , ((modMask .|. shiftMask, button3), mouseGesture gestures)
--- > ]
--- > where
--- > gestures = M.fromList
--- > [ ([], focus)
--- > , ([U], \w -> focus w >> windows W.swapUp)
--- > , ([D], \w -> focus w >> windows W.swapDown)
--- > , ([R, D], \_ -> sendMessage NextLayout)
--- > ]
---
--- This is just an example, of course. You can use any mouse button and
--- gesture definitions you want.
-
-data Direction = L | U | R | D
- deriving (Eq, Ord, Show, Read, Enum, Bounded)
-
-type Pos = (Position, Position)
-
-delta :: Pos -> Pos -> Position
-delta (ax, ay) (bx, by) = max (d ax bx) (d ay by)
- where
- d a b = abs (a - b)
-
-dir :: Pos -> Pos -> Direction
-dir (ax, ay) (bx, by) = trans . (/ pi) $ atan2 (fromIntegral $ ay - by) (fromIntegral $ bx - ax)
- where
- trans :: Double -> Direction
- trans x
- | rg (-3/4) (-1/4) x = D
- | rg (-1/4) (1/4) x = R
- | rg (1/4) (3/4) x = U
- | otherwise = L
- rg a z x = a <= x && x < z
-
-debugging :: Int
-debugging = 0
-
-collect :: IORef (Pos, [(Direction, Pos, Pos)]) -> Position -> Position -> X ()
-collect st nx ny = do
- let np = (nx, ny)
- stx@(op, ds) <- io $ readIORef st
- when (debugging > 0) $ io $ putStrLn $ show "Mouse Gesture" ++ unwords (map show (extract stx)) ++ (if debugging > 1 then "; " ++ show op ++ "-" ++ show np else "")
- case ds of
- []
- | insignificant np op -> return ()
- | otherwise -> io $ writeIORef st (op, [(dir op np, np, op)])
- (d, zp, ap_) : ds'
- | insignificant np zp -> return ()
- | otherwise -> do
- let
- d' = dir zp np
- ds''
- | d == d' = (d, np, ap_) : ds'
- | otherwise = (d', np, zp) : ds
- io $ writeIORef st (op, ds'')
- where
- insignificant a b = delta a b < 10
-
-extract :: (Pos, [(Direction, Pos, Pos)]) -> [Direction]
-extract (_, xs) = reverse . map (\(x, _, _) -> x) $ xs
-
-mouseGesture :: Map [Direction] (Window -> X ()) -> Window -> X ()
-mouseGesture tbl win = withDisplay $ \dpy -> do
- root <- asks theRoot
- let win' = if win == none then root else win
- acc <- io $ do
- qp@(_, _, _, ix, iy, _, _, _) <- queryPointer dpy win'
- when (debugging > 1) $ putStrLn $ show "queryPointer" ++ show qp
- when (debugging > 1 && win' == none) $ putStrLn $ show "mouseGesture" ++ "zomg none"
- newIORef ((fromIntegral ix, fromIntegral iy), [])
- mouseDrag (collect acc) $ do
- when (debugging > 0) $ io $ putStrLn $ show ""
- gest <- io $ liftM extract $ readIORef acc
- case M.lookup gest tbl of
- Nothing -> return ()
- Just f -> f win'