On Sat, Sep 22, 2012 at 10:18:15AM -0500, Joseph Garvin wrote:
I see that it's complaining that k is applied to too few arguments, so I looked in the docs for MultiToggle and in their example it looks like k takes what looks like a lambda (I'm actually confused by the syntax, I've never seen parens around a lambda parameter) as a second argument now for some reason:
The argument of a lambda may be an arbitrary pattern, just like in a function definition. Patterns other than single variables usually need to be surrounded by parentheses, since otherwise they will parse as multiple arguments. For example, foo (Just x) = x \(Just x) -> x
data MIRROR = MIRROR deriving (Read, Show, Eq, Typeable) instance Transformer MIRROR Window where transform _ x k = k (Mirror x) (\(Mirror x') -> x')
It looks like the second argument to k is a function which removes the transformation from the layout. For decoration, it looks like you want (\(ModifiedLayout _ x') -> x') In fact, that will work for the vast majority of transformations, which are mostly implemented using a layout modifier. Mirror is special because it's built into the xmonad core. -Brent