-----------------------------------------------------------------------------
-- |
-- 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,
XMonad.Actions.FlexibleResize.mouseResizeEdgeWindow
) 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 -- ^ The window to resize.
-> X ()
mouseResizeWindow = mouseResizeEdgeWindow 0
-- | Resize a floating window from whichever corner or edge the mouse is
-- closest to.
mouseResizeEdgeWindow
:: Rational -- ^ The size of the area where only one edge is resized.
-> Window -- ^ The window to resize.
-> X ()
mouseResizeEdgeWindow edge 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 (fi . ($ wa)) [wa_x, wa_y, wa_width, wa_height]
west = findPos ix width
north = findPos 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 let (nw,nh) = applySizeHintsContents sh (gx ex, gy ey)
io $ moveResizeWindow d w (fx nw) (fy nh) nw nh)
(float w)
where
findPos :: CInt -> Position -> Maybe Bool
findPos m s = if p < 0.5 - edge/2
then Just True
else if p < 0.5 + edge/2
then Nothing
else Just False
where p = fi m / fi s
mkSel :: Maybe Bool -> Position -> Position -> (Position, Dimension -> Position, Position -> Dimension)
mkSel b k p = case b of
Just True -> (0, (fi k + fi p -).fi, (fi k + fi p -).fi)
Nothing -> (k `div` 2, const p, const $ fi k)
Just False -> (k, const p, subtract (fi p) . fi)
fi :: (Num b, Integral a) => a -> b
fi = fromIntegral
