Re: [xmonad] Fwd: Patch to add new Layout message

Damn it, you tricked me into writing it: {-# LANGUAGE DeriveDataTypeable, FlexibleInstances, MultiParamTypeClasses #-} import Control.Arrow import XMonad import XMonad.StackSet data Flippy a = Flippy (Tall a) deriving (Show, Read) data Flip = Flip deriving Typeable instance Message Flip instance LayoutClass Flippy a where runLayout (Workspace id (Flippy tall) ms) r = fmap (second (fmap Flippy)) $ runLayout (Workspace id tall ms) r handleMessage (Flippy tall) m = case flip of Just _ -> return $ doFlip (Flippy tall) Nothing -> fmap (fmap Flippy) $ handleMessage tall m where flip = fromMessage m :: Maybe Flip doFlip (Flippy (Tall 1 delta frac)) = Just $ Flippy $ Tall 2 delta frac doFlip (Flippy (Tall _ delta frac)) = Just $ Flippy $ Tall 1 delta frac description _ = "Flippy" No guarantee this works, but it compiles. On Wed, Oct 1, 2014 at 6:10 PM, Brandon Allbery wrote:

On Wed, Oct 1, 2014 at 7:03 PM, Devin Mullins wrote:

...

I think another option is to make a new instance of LayoutClass that is just like Tall except for also supporting this message. In fact, you should be able to delegate to Tall for most definitions. Just writing off the cuff - could be wrong.

Delegating to Tall won't work; you'd have to copy the definition and modify it, like I suggested for (|||).

-- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net