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68 lines
2.2 KiB
Haskell
68 lines
2.2 KiB
Haskell
{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses #-}
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-----------------------------------------------------------------------------
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-- |
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-- Module : XMonad.Layout.Grid
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-- Copyright : (c) Lukas Mai
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-- License : BSD-style (see LICENSE)
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--
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-- Maintainer : <l.mai@web.de>
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-- Stability : unstable
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-- Portability : unportable
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--
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-- A simple layout that attempts to put all windows in a square grid.
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--
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-----------------------------------------------------------------------------
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module XMonad.Layout.Grid (
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-- * Usage
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-- $usage
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Grid(..)
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) where
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import XMonad
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import XMonad.StackSet
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import Graphics.X11.Xlib.Types
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-- $usage
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-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:
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--
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-- > import XMonad.Layout.Grid
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--
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-- Then edit your @layoutHook@ by adding the Grid layout:
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--
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-- > myLayouts = Grid ||| Full ||| etc..
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-- > main = xmonad defaultConfig { layoutHook = myLayouts }
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--
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-- For more detailed instructions on editing the layoutHook see:
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--
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-- "XMonad.Doc.Extending#Editing_the_layout_hook"
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data Grid a = Grid deriving (Read, Show)
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instance LayoutClass Grid a where
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pureLayout Grid r s = arrange r (integrate s)
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arrange :: Rectangle -> [a] -> [(a, Rectangle)]
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arrange (Rectangle rx ry rw rh) st = zip st rectangles
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where
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nwins = length st
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ncols = ceiling . (sqrt :: Double -> Double) . fromIntegral $ nwins
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mincs = nwins `div` ncols
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extrs = nwins - ncols * mincs
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chop :: Int -> Dimension -> [(Position, Dimension)]
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chop n m = ((0, m - k * fromIntegral (pred n)) :) . map (flip (,) k) . tail . reverse . take n . tail . iterate (subtract k') $ m'
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where
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k :: Dimension
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k = m `div` fromIntegral n
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m' = fromIntegral m
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k' :: Position
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k' = fromIntegral k
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xcoords = chop ncols rw
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ycoords = chop mincs rh
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ycoords' = chop (succ mincs) rh
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(xbase, xext) = splitAt (ncols - extrs) xcoords
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rectangles = combine ycoords xbase ++ combine ycoords' xext
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where
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combine ys xs = [Rectangle (rx + x) (ry + y) w h | (x, w) <- xs, (y, h) <- ys]
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