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55 lines
1.6 KiB
Haskell
55 lines
1.6 KiB
Haskell
-----------------------------------------------------------------------------
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-- |
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-- Module : XMonadContrib.UpdatePointer
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-- Copyright : (c) Robert Marlow <robreim@bobturf.org>
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-- License : BSD3-style (see LICENSE)
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--
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-- Maintainer : Robert Marlow <robreim@bobturf.org>
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-- Stability : stable
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-- Portability : portable
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--
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-- Causes the pointer to follow whichever window focus changes to. Compliments
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-- the idea of switching focus as the mouse crosses window boundaries to
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-- keep the mouse near the currently focussed window
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--
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-----------------------------------------------------------------------------
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module XMonad.Actions.UpdatePointer
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(
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-- * Usage
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-- $usage
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updatePointer
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)
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where
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import XMonad
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import Control.Monad
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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
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-- > import XMonad.Hooks.DynamicLog
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--
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-- Enable it by including it in your logHook definition. Eg:
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--
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-- > logHook = updatePointer (1%2) (1%2)
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--
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-- which will move the pointer to the middle of a newly focused window if the
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-- focus moves away from the pointer
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-- | Update the pointer's location to the currently focused window unless it's
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-- already there
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updatePointer :: Rational -> Rational -> X ()
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updatePointer h v = withFocused $ \w -> do
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dpy <- asks display
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root <- asks theRoot
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wa <- io $ getWindowAttributes dpy w
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(sameRoot,_,w',_,_,_,_,_) <- io $ queryPointer dpy root
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unless (sameRoot && w == w') $
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io $ warpPointer dpy none w 0 0 0 0
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(fraction h (wa_width wa)) (fraction v (wa_height wa))
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where fraction x y = floor (x * fromIntegral y)
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