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f732082fdc
Typeable has been automatically derived for every type since GHC 7.10, so remove these obsolete derivations. This also allows us to get rid of the `DeriveDataTypeable` pragma quite naturally. Related: https://github.com/xmonad/xmonad/pull/299 (xmonad/xmonad@9e5b16ed8a) Related: bd5b969d9ba24236c0d5ef521c0397390dbc4b37 Fixes: https://github.com/xmonad/xmonad-contrib/issues/548
75 lines
2.6 KiB
Haskell
75 lines
2.6 KiB
Haskell
{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses #-}
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-----------------------------------------------------------------------------
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-- |
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-- Module : XMonad.Layout.Circle
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-- Copyright : (c) Peter De Wachter
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-- License : BSD-style (see LICENSE)
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--
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-- Maintainer : Peter De Wachter <pdewacht@gmail.com>
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-- Stability : unstable
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-- Portability : unportable
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--
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-- Circle is an elliptical, overlapping layout, by Peter De Wachter
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--
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-----------------------------------------------------------------------------
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module XMonad.Layout.Circle (
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-- * Usage
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-- $usage
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Circle (..)
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) where -- actually it's an ellipse
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import XMonad.Prelude
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import XMonad
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import XMonad.StackSet (integrate, peek)
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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.Circle
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--
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-- Then edit your @layoutHook@ by adding the Circle layout:
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--
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-- > myLayout = Circle ||| Full ||| etc..
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-- > main = xmonad def { layoutHook = myLayout }
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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 Circle a = Circle deriving ( Read, Show )
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instance LayoutClass Circle Window where
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doLayout Circle r s = do layout <- raiseFocus $ circleLayout r $ integrate s
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return (layout, Nothing)
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circleLayout :: Rectangle -> [a] -> [(a, Rectangle)]
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circleLayout _ [] = []
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circleLayout r (w:ws) = master : rest
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where master = (w, center r)
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rest = zip ws $ map (satellite r) [0, pi * 2 / fromIntegral (length ws) ..]
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raiseFocus :: [(Window, Rectangle)] -> X [(Window, Rectangle)]
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raiseFocus xs = do focused <- withWindowSet (return . peek)
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return $ case find ((== focused) . Just . fst) xs of
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Just x -> x : delete x xs
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Nothing -> xs
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center :: Rectangle -> Rectangle
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center (Rectangle sx sy sw sh) = Rectangle x y w h
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where s = sqrt 2 :: Double
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w = round (fromIntegral sw / s)
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h = round (fromIntegral sh / s)
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x = sx + fromIntegral (sw - w) `div` 2
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y = sy + fromIntegral (sh - h) `div` 2
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satellite :: Rectangle -> Double -> Rectangle
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satellite (Rectangle sx sy sw sh) a = Rectangle (sx + round (rx + rx * cos a))
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(sy + round (ry + ry * sin a))
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w h
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where rx = fromIntegral (sw - w) / 2
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ry = fromIntegral (sh - h) / 2
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w = sw * 10 `div` 25
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h = sh * 10 `div` 25
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