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-rw-r--r--src/Main.hs4
-rw-r--r--src/Xmobar.hs40
2 files changed, 31 insertions, 13 deletions
diff --git a/src/Main.hs b/src/Main.hs
index 18e05e2..941a844 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -42,6 +42,7 @@ import Control.Monad (unless)
main :: IO ()
main = do
d <- openDisplay ""
+ d' <- openDisplay ""
args <- getArgs
(o,file) <- getOpts args
(c,defaultings) <- case file of
@@ -60,7 +61,8 @@ main = do
cls <- mapM (parseTemplate conf) (splitTemplate conf)
vars <- mapM (mapM startCommand) cls
(r,w) <- createWin d fs conf
- eventLoop (XConf d r w fs conf) vars
+ _ <- enableXRandrEventListen d'
+ eventLoop (XConf d d' r w fs conf) vars
-- | Splits the template in its parts
splitTemplate :: Config -> [String]
diff --git a/src/Xmobar.hs b/src/Xmobar.hs
index 462de14..97d6990 100644
--- a/src/Xmobar.hs
+++ b/src/Xmobar.hs
@@ -23,7 +23,7 @@ module Xmobar
, startCommand
-- * Window Management
-- $window
- , createWin, updateWin
+ , createWin, updateWin, enableXRandrEventListen
-- * Printing
-- $print
, drawInWin, printStrings
@@ -60,6 +60,7 @@ type X = ReaderT XConf IO
-- | The ReaderT inner component
data XConf =
XConf { display :: Display
+ , xrrDspy :: Display -- display used for XRandr events
, rect :: Rectangle
, window :: Window
, fontS :: XFont
@@ -75,7 +76,7 @@ instance Exception WakeUp
-- | The event loop
eventLoop :: XConf -> [[(Maybe ThreadId, TVar String)]] -> IO ()
-eventLoop xc@(XConf d _ w fs c) vs = block $ do
+eventLoop xc@(XConf d xrrD _ w fs c) vs = block $ do
tv <- atomically $ newTVar []
t <- myThreadId
ct <- forkIO (checker t tv [] `catch` \(SomeException _) -> return ())
@@ -101,16 +102,24 @@ eventLoop xc@(XConf d _ w fs c) vs = block $ do
go tv ct
-- event hanlder
- handle _ _ (ConfigureEvent {}) = return ()
+ handle _ ct (ConfigureEvent {}) = recreateWindow ct
- handle tvar _ (ExposeEvent {}) = runX xc (updateWin tvar)
+ handle tvar ct (ExposeEvent {}) = block $ do
+ -- check if there are XRandr events pending
+ num <- pending xrrD
+ if num == 0 then
+ -- if no pending events, make a update
+ runX xc (updateWin tvar)
+ else
+ recreateWindow ct
- -- this catches the RRScreenChangeNotify
- handle _ ct _ = block $ do
- killThread ct
- destroyWindow d w
- (r',w') <- createWin d fs c
- eventLoop (XConf d r' w' fs c) vs
+ handle _ _ _ = return ()
+
+ recreateWindow ct = do
+ killThread ct
+ destroyWindow d w
+ (r',w') <- createWin d fs c
+ eventLoop (XConf d xrrD r' w' fs c) vs
-- $command
@@ -129,6 +138,14 @@ startCommand (com,s,ss)
-- $window
+-- | The function to enable notifications from XRandr
+enableXRandrEventListen :: Display -> IO ()
+enableXRandrEventListen d = do
+ let dflt = defaultScreen d
+ rootw <- rootWindow d dflt
+ -- RRScreenChangeNotifyMask has the same value as keyPressMask
+ xrrSelectInput d rootw keyPressMask
+
-- | The function to create the initial window
createWin :: Display -> XFont -> Config -> IO (Rectangle,Window)
createWin d fs c = do
@@ -139,8 +156,7 @@ createWin d fs c = do
let ht = as + ds + 4
(r,o) = setPosition (position c) srs (fi ht)
win <- newWindow d (defaultScreenOfDisplay d) rootw r o
- -- RRScreenChangeNotifyMask has the same value as keyPressMask
- xrrSelectInput d rootw keyPressMask
+ selectInput d win (exposureMask .|. structureNotifyMask)
setProperties r c d win srs
when (lowerOnStart c) (lowerWindow d win)
mapWindow d win