-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Actions.FlexibleResize
-- Copyright : (c) Lukas Mai
-- License : BSD3-style (see LICENSE)
--
-- Maintainer : <l.mai@web.de>
-- Stability : unstable
-- Portability : unportable
--
-- Resize floating windows from any corner.
--
-----------------------------------------------------------------------------
module XMonad.Actions.FlexibleResize (
-- * Usage
-- $usage
XMonad.Actions.FlexibleResize.mouseResizeWindow
) where
import XMonad
import Foreign.C.Types
-- $usage
-- To use, first import this module into your @~\/.xmonad\/xmonad.hs@ file:
--
-- > import qualified XMonad.Actions.FlexibleResize as Flex
--
-- Then add an appropriate mouse binding:
--
-- > , ((modMask x, button3), (\w -> focus w >> Flex.mouseResizeWindow w))
--
-- For detailed instructions on editing your mouse bindings, see
-- "XMonad.Doc.Extending#Editing_mouse_bindings".
-- | Resize a floating window from whichever corner the mouse is
-- closest to.
mouseResizeWindow :: Window -> X ()
mouseResizeWindow w = whenX (isClient w) $ withDisplay $ \d -> do
io $ raiseWindow d w
wa <- io $ getWindowAttributes d w
sh <- io $ getWMNormalHints d w
(_, _, _, _, _, ix, iy, _) <- io $ queryPointer d w
let
[pos_x, pos_y, width, height] = map (fromIntegral . ($ wa)) [wa_x, wa_y, wa_width, wa_height]
west = firstHalf ix width
north = firstHalf iy height
(cx, fx, gx) = mkSel west width pos_x
(cy, fy, gy) = mkSel north height pos_y
io $ warpPointer d none w 0 0 0 0 cx cy
mouseDrag (\ex ey -> do
wa' <- io $ getWindowAttributes d w
let [px, py] = map (fromIntegral . ($ wa')) [wa_x, wa_y]
io $ moveResizeWindow d w (fx px (fromIntegral ex))
(fy py (fromIntegral ey))
`uncurry` applySizeHints sh (gx $ fromIntegral ex, gy $ fromIntegral ey))
(float w)
where
firstHalf :: CInt -> Position -> Bool
firstHalf a b = fromIntegral a * 2 <= b
cfst = curry fst
csnd = curry snd
mkSel :: Bool -> Position -> Position -> (Position, a -> a -> a, CInt -> Position)
mkSel b k p =
if b
then (0, csnd, ((k + p) -) . fromIntegral)
else (k, cfst, subtract p . fromIntegral)
