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|
{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses #-}
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Layout.TwoPane
-- Copyright : (c) Spencer Janssen <spencerjanssen@gmail.com>
-- License : BSD3-style (see LICENSE)
--
-- Maintainer : Spencer Janssen <spencerjanssen@gmail.com>
-- Stability : unstable
-- Portability : unportable
--
-- A layout that splits the screen horizontally and shows two windows. The
-- left window is always the master window, and the right is either the
-- currently focused window or the second window in layout order.
--
-----------------------------------------------------------------------------
module XMonad.Layout.TwoPane (
-- * Usage
-- $usage
TwoPane (..)
) where
import XMonad hiding (focus)
import XMonad.StackSet ( focus, up, down)
-- $usage
-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:
--
-- > import XMonad.Layout.TwoPane
--
-- Then edit your @layoutHook@ by adding the TwoPane layout:
--
-- > myLayouts = TwoPane (3/100) (1/2) ||| Full ||| etc..
-- > main = xmonad defaultConfig { layoutHook = myLayouts }
--
-- For more detailed instructions on editing the layoutHook see:
--
-- "XMonad.Doc.Extending#Editing_the_layout_hook"
data TwoPane a =
TwoPane Rational Rational
deriving ( Show, Read )
instance LayoutClass TwoPane a where
doLayout (TwoPane _ split) r s = return (arrange r s,Nothing)
where
arrange rect st = case reverse (up st) of
(master:_) -> [(master,left),(focus st,right)]
[] -> case down st of
(next:_) -> [(focus st,left),(next,right)]
[] -> [(focus st, rect)]
where (left, right) = splitHorizontallyBy split rect
handleMessage (TwoPane delta split) x =
return $ case fromMessage x of
Just Shrink -> Just (TwoPane delta (split - delta))
Just Expand -> Just (TwoPane delta (split + delta))
_ -> Nothing
description _ = "TwoPane"
|
