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|
{-# LANGUAGE FlexibleInstances, TypeSynonymInstances #-}
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Actions.FlexibleManipulate
-- Copyright : (c) Michael Sloan
-- License : BSD3-style (see LICENSE)
--
-- Maintainer : <mgsloan@gmail.com>
-- Stability : stable
-- Portability : unportable
--
-- Move and resize floating windows without warping the mouse.
--
-----------------------------------------------------------------------------
-- Based on the FlexibleResize code by Lukas Mai (mauke).
module XMonad.Actions.FlexibleManipulate (
-- * Usage
-- $usage
mouseWindow, discrete, linear, resize, position
) where
import XMonad
-- $usage
-- First, add this import to your @~\/.xmonad\/xmonad.hs@:
--
-- > import qualified XMonad.Actions.FlexibleManipulate as Flex
--
-- Now set up the desired mouse binding, for example:
--
-- > , ((modMask x, 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. (The window is divided by thirds for each axis.)
--
-- * Flex.'resize' performs only a resize of the window, based on which
-- quadrant the mouse is in.
--
-- * Flex.'position' is similar to the built-in
-- 'XMonad.Operations.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.
--
-- For detailed instructions on editing your mouse bindings, see
-- "XMonad.Doc.Extending#Editing_mouse_bindings".
discrete, linear, resize, position :: Double -> Double
-- | Manipulate the window based on discrete pick regions; the window
-- is divided into regions by thirds along each axis.
discrete x | x < 0.33 = 0
| x > 0.66 = 1
| otherwise = 0.5
-- | Scale\/reposition the window by factors obtained from the mouse
-- position by linear interpolation. Dragging precisely on a corner
-- resizes that corner; dragging precisely in the middle moves the
-- window without resizing; anything else is an interpolation
-- between the two.
linear = id
-- | Only resize the window, based on the window quadrant the mouse is in.
resize x = if x < 0.5 then 0 else 1
-- | Only reposition the window.
position = const 0.5
-- | Given an interpolation function, implement an appropriate window
-- manipulation action.
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 = applySizeHintsContents sh $ mapP (round :: Double -> Integer) (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
|
