{-# OPTIONS_GHC -fglasgow-exts #-}
-----------------------------------------------------------------------------
-- |
-- Module : XMonadContrib.FlexibleManipulate
-- Copyright : (c) Michael Sloan
-- License : BSD3-style (see LICENSE)
--
-- Maintainer : <mgsloan@gmail.com>
-- Stability : unstable
-- Portability : unportable
--
-- Lets you move and resize floating windows without warping the mouse.
--
-----------------------------------------------------------------------------
-- Based on the FlexibleResize code by Lukas Mai (Mauke)
module XMonadContrib.FlexibleManipulate (
-- * Usage
-- $usage
mouseWindow, discrete, linear, resize, position
) where
import XMonad
import Operations
import Graphics.X11.Xlib
import Graphics.X11.Xlib.Extras
-- $usage
-- Add this import to your Config.hs file:
--
-- > import qualified XMonadContrib.FlexibleManipulate as Flex
--
-- Set one of the mouse button bindings up like this:
--
-- > mouseBindings = M.fromList
-- > [ ((modMask, button1), (\w -> focus w >> Flex.mouseWindow Flex.linear w)) ], ...
--
-- Flex.linear indicates that positions between the edges and the middle
-- indicate a combination scale\/position.
-- Flex.discrete indicates that there are discrete pick regions. (window
-- is divided by thirds for each axis)
-- Flex.resize performs only resize of the window, based on which quadrant
-- the mouse is in
-- Flex.position is similar to the builtin mouseMoveWindow
--
-- You can also write your own function for this parameter. It should take
-- a value between 0 and 1 indicating position, and return a value indicating
-- the corresponding position if plain Flex.linear was used.
discrete, linear, resize, position :: Double -> Double
discrete x | x < 0.33 = 0
| x > 0.66 = 1
| otherwise = 0.5
linear = id
resize x = if x < 0.5 then 0 else 1
position = const 0.5
mouseWindow :: (Double -> Double) -> Window -> X ()
mouseWindow f w = whenX (isClient w) $ withDisplay $ \d -> do
io $ raiseWindow d w
[wpos, wsize] <- io $ getWindowAttributes d w >>= return . winAttrs
sh <- io $ getWMNormalHints d w
pointer <- io $ queryPointer d w >>= return . pointerPos
let uv = (pointer - wpos) / wsize
fc = mapP f uv
mul = mapP (\x -> 2 - 2 * abs(x - 0.5)) fc --Fudge factors: interpolation between 1 when on edge, 2 in middle
atl = ((1, 1) - fc) * mul
abr = fc * mul
mouseDrag (\ex ey -> io $ do
let offset = (fromIntegral ex, fromIntegral ey) - pointer
npos = wpos + offset * atl
nbr = (wpos + wsize) + offset * abr
ntl = minP (nbr - (32, 32)) npos --minimum size
nwidth = applySizeHints sh $ mapP round (nbr - ntl)
moveResizeWindow d w (round $ fst ntl) (round $ snd ntl) `uncurry` nwidth
return ())
(float w)
float w
where
pointerPos (_,_,_,px,py,_,_,_) = (fromIntegral px,fromIntegral py) :: Pnt
winAttrs :: WindowAttributes -> [Pnt]
winAttrs x = pairUp $ map (fromIntegral . ($ x)) [wa_x, wa_y, wa_width, wa_height]
-- I'd rather I didn't have to do this, but I hate writing component 2d math
type Pnt = (Double, Double)
pairUp :: [a] -> [(a,a)]
pairUp [] = []
pairUp [_] = []
pairUp (x:y:xs) = (x, y) : (pairUp xs)
mapP :: (a -> b) -> (a, a) -> (b, b)
mapP f (x, y) = (f x, f y)
zipP :: (a -> b -> c) -> (a,a) -> (b,b) -> (c,c)
zipP f (ax,ay) (bx,by) = (f ax bx, f ay by)
minP :: Ord a => (a,a) -> (a,a) -> (a,a)
minP = zipP min
instance Num Pnt where
(+) = zipP (+)
(-) = zipP (-)
(*) = zipP (*)
abs = mapP abs
signum = mapP signum
fromInteger = const undefined
instance Fractional Pnt where
fromRational = const undefined
recip = mapP recip
