From c948559c532a24cc97e51d1e55e0866f0f571458 Mon Sep 17 00:00:00 2001
From: Andrea Rossato <andrea.rossato@unibz.it>
Date: Tue, 12 Feb 2008 17:34:55 +0000
Subject: [PATCH] Add Actions.MouseResize: a layout modifier to resize windows
with the mouse
---
XMonad/Actions/MouseResize.hs | 119 ++++++++++++++++++++++++++++++++++
xmonad-contrib.cabal | 1 +
2 files changed, 120 insertions(+)
create mode 100644 XMonad/Actions/MouseResize.hs
diff --git a/XMonad/Actions/MouseResize.hs b/XMonad/Actions/MouseResize.hs
new file mode 100644
index 00000000..063ac0b4
--- /dev/null
+++ b/XMonad/Actions/MouseResize.hs
@@ -0,0 +1,119 @@
+{-# LANGUAGE GeneralizedNewtypeDeriving, MultiParamTypeClasses, PatternGuards, TypeSynonymInstances #-}
+
+-----------------------------------------------------------------------------
+-- |
+-- Module : XMonad.Actions.MouseResize
+-- Copyright : (c) 2007 Andrea Rossato
+-- License : BSD-style (see xmonad/LICENSE)
+--
+-- Maintainer : andrea.rossato@unibz.it
+-- Stability : unstable
+-- Portability : unportable
+--
+-- A layout modifier to resize windows with the mouse by grabbing the
+-- window's lower right corner.
+--
+-- This module must be used together with "XMonad.Layout.WindowArranger".
+-----------------------------------------------------------------------------
+
+module XMonad.Actions.MouseResize
+ ( -- * Usage:
+ -- $usage
+ mouseResize
+ , MouseResize (..)
+ ) where
+
+import Control.Monad
+
+import XMonad
+import XMonad.Layout.Decoration
+import XMonad.Layout.LayoutModifier
+
+import XMonad.Layout.WindowArranger
+import XMonad.Util.XUtils
+
+-- $usage
+-- Usually this module is used to create layouts, but you can also use
+-- it to resize windows in any layout, together with the
+-- "XMonad.Layout.WindowArranger". For usage example see
+-- "XMonad.Layout.SimpleFloat" or "XMonad.Layout.DecorationMadness".
+--
+-- You can use this module with the following in your
+-- @~\/.xmonad\/xmonad.hs@:
+--
+-- > import XMonad.Actions.MouseResize
+-- > import XMonad.Layout.WindowArranger
+--
+-- Then edit your @layoutHook@ by modifying a given layout:
+--
+-- > myLayouts = mouseResize $ windowArrange $ layoutHook defaultConfig
+--
+-- and then:
+--
+-- > main = xmonad defaultConfig { layoutHook = myLayouts }
+--
+-- For more detailed instructions on editing the layoutHook see:
+--
+-- "XMonad.Doc.Extending#Editing_the_layout_hook"
+
+mouseResize :: l a -> ModifiedLayout MouseResize l a
+mouseResize = ModifiedLayout (MR [])
+
+data MouseResize a = MR [((a,Rectangle),a)]
+instance Show (MouseResize a) where show _ = []
+instance Read (MouseResize a) where readsPrec _ _ = []
+
+instance LayoutModifier MouseResize Window where
+ redoLayout (MR st) _ _ wrs
+ | [] <- st = do nst <- filterM (liftM not . isDecoration . fst) wrs >>= initState
+ return (wrs, Just $ MR nst)
+ | otherwise = do nst <- filterM (liftM not . isDecoration . fst) wrs >>= processState
+ return (wrs, Just $ MR nst)
+ where
+ initState ws = mapM createInputWindow ws
+ processState ws = deleteWindows (map snd st) >> mapM createInputWindow ws
+
+ handleMess (MR s) m
+ | Just e <- fromMessage m :: Maybe Event = handleResize s e >> return Nothing
+ | Just Hide <- fromMessage m = releaseResources >> return (Just $ MR [])
+ | Just ReleaseResources <- fromMessage m = releaseResources >> return (Just $ MR [])
+ where releaseResources = deleteWindows (map snd s)
+ handleMess _ _ = return Nothing
+
+handleResize :: [((Window,Rectangle),Window)] -> Event -> X ()
+handleResize st ButtonEvent { ev_window = ew, ev_event_type = et }
+ | et == buttonPress
+ , Just (w,Rectangle wx wy _ _) <- getWin ew st = do
+ focus w
+ mouseDrag (\x y -> do
+ let rect = Rectangle wx wy
+ (max 1 . fi $ x - wx)
+ (max 1 . fi $ y - wy)
+ sendMessage (SetGeometry rect)) (return ())
+
+ where
+ getWin w (((win,r),w'):xs)
+ | w == w' = Just (win,r)
+ | otherwise = getWin w xs
+ getWin _ [] = Nothing
+handleResize _ _ = return ()
+
+createInputWindow :: (Window,Rectangle) -> X ((Window,Rectangle),Window)
+createInputWindow (w,r@(Rectangle x y wh ht)) = do
+ d <- asks display
+ let rect = Rectangle (x + fi wh - 5) (y + fi ht - 5) 10 10
+ tw <- mkInputWindow d rect
+ io $ selectInput d tw (exposureMask .|. buttonPressMask)
+ showWindow tw
+ return ((w,r),tw)
+
+mkInputWindow :: Display -> Rectangle -> X Window
+mkInputWindow d (Rectangle x y w h) = do
+ rw <- asks theRoot
+ let screen = defaultScreenOfDisplay d
+ visual = defaultVisualOfScreen screen
+ attrmask = cWOverrideRedirect
+ io $ allocaSetWindowAttributes $
+ \attributes -> do
+ set_override_redirect attributes True
+ createWindow d rw x y w h 0 0 inputOnly visual attrmask attributes
diff --git a/xmonad-contrib.cabal b/xmonad-contrib.cabal
index ad74cd94..968ebf17 100644
--- a/xmonad-contrib.cabal
+++ b/xmonad-contrib.cabal
@@ -72,6 +72,7 @@ library
XMonad.Actions.FloatKeys
XMonad.Actions.FocusNth
XMonad.Actions.MouseGestures
+ XMonad.Actions.MouseResize
XMonad.Actions.NoBorders
XMonad.Actions.RotSlaves
XMonad.Actions.Search