From 8ea800dd0f798f40e8e81b8a266e6d5690d0cb49 Mon Sep 17 00:00:00 2001
From: daniel <daniel@wagner-home.com>
Date: Wed, 21 Mar 2007 06:42:45 +0100
Subject: Allow dynamic width in tiling mode

darcs-hash:20070321054245-c98ca-fc10278adbcbfe61de0f7bb4d4e14c5befc565b2.gz
---
 Main.hs   | 18 +++++++++++++++---
 XMonad.hs |  2 ++
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/Main.hs b/Main.hs
index 26616b2..820a153 100644
--- a/Main.hs
+++ b/Main.hs
@@ -15,6 +15,7 @@
 
 import Data.List
 import Data.Maybe
+import Data.Ratio
 import Data.Bits hiding (rotate)
 import qualified Data.Map as M
 
@@ -53,6 +54,8 @@ keys = M.fromList $
     , ((modMask,               xK_Tab   ), raise GT)
     , ((modMask,               xK_j     ), raise GT)
     , ((modMask,               xK_k     ), raise LT)
+    , ((modMask,               xK_h     ), changeWidth (negate defaultDelta))
+    , ((modMask,               xK_l     ), changeWidth defaultDelta)
     , ((modMask .|. shiftMask, xK_c     ), kill)
     , ((modMask .|. shiftMask, xK_q     ), io $ exitWith ExitSuccess)
     , ((modMask,               xK_space ), switchLayout)
@@ -68,15 +71,16 @@ keys = M.fromList $
         , (f, m) <- [(view, 0), (tag, shiftMask)]]
 
 
+-- How much to change the size of the windows on the left by default
+defaultDelta :: Rational
+defaultDelta = 3%100
+
 --
 -- The mask for the numlock key.  You may need to change this on some systems.
 --
 numlockMask :: KeySym
 numlockMask = lockMask
 
-ratio :: Rational
-ratio = 0.5
-
 --
 -- The main entry point
 -- 
@@ -100,6 +104,7 @@ main = do
             , dimensions   = (displayWidth  dpy dflt, displayHeight dpy dflt)
             , workspace    = W.empty workspaces
             , layout       = Full
+            , leftWidth    = 3%5
             }
 
     xSetErrorHandler -- in C, I'm too lazy to write the binding
@@ -243,6 +248,7 @@ refresh = do
     xinesc <- gets xineScreens
     d <- gets display
     l <- gets layout
+    ratio <- gets leftWidth
     let move w a b c e = io $ moveResizeWindow d w a b c e
     flip mapM_ (M.assocs ws2sc) $ \(n, scn) -> do
         let sc = xinesc !! scn
@@ -274,6 +280,12 @@ switchLayout = do
                                 Tile -> Full })
     refresh
 
+-- | changeWidth.  Change the width of the main window in tiling mode.
+changeWidth :: Rational -> X ()
+changeWidth delta = do
+    modify (\s -> s {leftWidth = leftWidth s + delta})
+    refresh
+
 -- | windows. Modify the current window list with a pure function, and refresh
 windows :: (WorkSpace -> WorkSpace) -> X ()
 windows f = do
diff --git a/XMonad.hs b/XMonad.hs
index f18460c..ee23739 100644
--- a/XMonad.hs
+++ b/XMonad.hs
@@ -44,6 +44,8 @@ data XState = XState
     , dimensions    :: {-# UNPACK #-} !(Int,Int)
     , workspace     :: {-# UNPACK #-} !WorkSpace      -- ^ workspace list
     , layout        :: {-# UNPACK #-} !Layout
+    -- how much of the screen the main window should take
+    , leftWidth     :: {-# UNPACK #-} !Rational
     }
 
 type WorkSpace = StackSet Window
-- 
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