Making fullscreen windows not tiled in xmonad + KDE

Question

I understand, that I need to add something like:

composeOne [ isFullscreen -?> doFullFloat ]

to my ManageHook. At least according to this page.

But I'm not really sure where to add it in my xmonad config. My Haskell knowledge is relatively minor and because I'm using xmonad with KDE the config file does not have a very standard look.

My xmonad.hs looks like this:

import XMonad
import XMonad.Config.Kde
import qualified XMonad.StackSet as W -- to shift and float windows
import XMonad.Hooks.ManageHelpers

main = xmonad $ kdeConfig

 { modMask = mod4Mask -- use the Windows button as mod
 , manageHook = manageHook kdeConfig <+> myManageHook
 }
 where
   myManageHook = composeAll . concat $
     [ [ className   =? c --> doFloat           | c <- myFloats]
     , [ title       =? t --> doFloat           | t <- myOtherFloats]
     , [ className   =? c --> doF (W.shift "3") | c <- webApps]
     , [ className   =? c --> doF (W.shift "4") | c <- ircApps]
     ]
   myFloats      = ["MPlayer", "Gimp", "Skype", "Plasma-desktop", "VirtualBox"]
   myOtherFloats = ["alsamixer"]
   webApps       = ["Firefox-bin", "Opera"] -- open on desktop 3
   ircApps       = ["Ksirc"]                -- open on desktop 4

Where ever I try to put it, I just get cryptic error messages, of which Haskell is famous for.

Answer 1

You can't plug it in directly because the types don't match:

ghci> :t isFullscreen -?> doFullFloat
isFullscreen -?> doFullFloat :: MaybeManageHook
ghci> :t composeAll
composeAll :: [ManageHook] -> ManageHook

Note, however

ghci> :t composeOne 
composeOne :: [MaybeManageHook] -> ManageHook

That takes a list of manage hooks that may or may not run and combines them into one action.

MaybeManageHook also fits nicely with

*Main> :t maybeToDefinite 
maybeToDefinite :: MaybeManageHook -> ManageHook

Add either

, [ maybeToDefinite (isFullscreen -?> doFullFloat) ]

or

, [ composeOne [ isFullscreen -?> doFullFloat ] ]

to the definition of myManageHook.