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|
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Actions.UpdateFocus
-- Copyright : (c) Daniel Schoepe
-- License : BSD3-style (see LICENSE)
--
-- Maintainer : Daniel Schoepe <asgaroth_@gmx.de>
-- Stability : unstable
-- Portability : unportable
--
-- Updates the focus on mouse move in unfocused windows.
--
-----------------------------------------------------------------------------
module XMonad.Actions.UpdateFocus (
-- * Usage
-- $usage
focusOnMouseMove,
adjustEventInput
) where
import XMonad
import qualified XMonad.StackSet as W
import Control.Monad (when)
import Data.Monoid
-- $usage
-- To make the focus update on mouse movement within an unfocused window, add the
-- following to your @~\/.xmonad\/xmonad.hs@:
--
-- > import XMonad.Actions.UpdateFocus
-- > xmonad $ def {
-- > ..
-- > startupHook = adjustEventInput
-- > handleEventHook = focusOnMouseMove
-- > ..
-- > }
--
-- This module is probably only useful when focusFollowsMouse is set to True(default).
-- | Changes the focus if the mouse is moved within an unfocused window.
focusOnMouseMove :: Event -> X All
focusOnMouseMove (MotionEvent { ev_x = x, ev_y = y, ev_window = root }) = do
-- check only every 15 px to avoid excessive calls to translateCoordinates
when (x `mod` 15 == 0 || y `mod` 15 == 0) $ do
dpy <- asks display
foc <- withWindowSet $ return . W.peek
-- get the window under the pointer:
(_,_,_,w) <- io $ translateCoordinates dpy root root (fromIntegral x) (fromIntegral y)
when (foc /= Just w) $ focus w
return (All True)
focusOnMouseMove _ = return (All True)
-- | Adjusts the event mask to pick up pointer movements.
adjustEventInput :: X ()
adjustEventInput = withDisplay $ \dpy -> do
rootw <- asks theRoot
io $ selectInput dpy rootw $ substructureRedirectMask .|. substructureNotifyMask
.|. enterWindowMask .|. leaveWindowMask .|. structureNotifyMask
.|. buttonPressMask .|. pointerMotionMask
|
