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<title>XMonad/Hooks/ScreenCorners.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE DeriveDataTypeable #-}</span>
<a name="line-2"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-3"></a><span class='hs-comment'>-- |</span>
<a name="line-4"></a><span class='hs-comment'>-- Module : XMonad.Hooks.ScreenCorners</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) 2009 Nils Schweinsberg</span>
<a name="line-6"></a><span class='hs-comment'>-- License : BSD3-style (see LICENSE)</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer : Nils Schweinsberg <mail@n-sch.de></span>
<a name="line-9"></a><span class='hs-comment'>-- Stability : unstable</span>
<a name="line-10"></a><span class='hs-comment'>-- Portability : unportable</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a><span class='hs-comment'>-- Run @X ()@ actions by touching the edge of your screen with your mouse.</span>
<a name="line-13"></a><span class='hs-comment'>--</span>
<a name="line-14"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-15"></a>
<a name="line-16"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Hooks</span><span class='hs-varop'>.</span><span class='hs-conid'>ScreenCorners</span>
<a name="line-17"></a> <span class='hs-layout'>(</span>
<a name="line-18"></a> <span class='hs-comment'>-- * Usage</span>
<a name="line-19"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-20"></a>
<a name="line-21"></a> <span class='hs-comment'>-- * Adding screen corners</span>
<a name="line-22"></a> <span class='hs-conid'>ScreenCorner</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-23"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>addScreenCorner</span>
<a name="line-24"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>addScreenCorners</span>
<a name="line-25"></a>
<a name="line-26"></a> <span class='hs-comment'>-- * Event hook</span>
<a name="line-27"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>screenCornerEventHook</span>
<a name="line-28"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-29"></a>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Monoid</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span><span class='hs-varid'>find</span><span class='hs-layout'>)</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Util</span><span class='hs-varop'>.</span><span class='hs-conid'>XUtils</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span><span class='hs-layout'>)</span>
<a name="line-34"></a>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Map</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>M</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Util</span><span class='hs-varop'>.</span><span class='hs-conid'>ExtensibleState</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>XS</span>
<a name="line-37"></a>
<a name="line-38"></a><a name="ScreenCorner"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ScreenCorner</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>SCUpperLeft</span>
<a name="line-39"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SCUpperRight</span>
<a name="line-40"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SCLowerLeft</span>
<a name="line-41"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SCLowerRight</span>
<a name="line-42"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-43"></a>
<a name="line-44"></a>
<a name="line-45"></a>
<a name="line-46"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-47"></a><span class='hs-comment'>-- ExtensibleState modifications</span>
<a name="line-48"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-49"></a>
<a name="line-50"></a><a name="ScreenCornerState"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>ScreenCornerState</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ScreenCornerState</span> <span class='hs-layout'>(</span><span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-conid'>Map</span> <span class='hs-conid'>Window</span> <span class='hs-layout'>(</span><span class='hs-conid'>ScreenCorner</span><span class='hs-layout'>,</span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-51"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Typeable</span>
<a name="line-52"></a>
<a name="line-53"></a><a name="instance%20ExtensionClass%20ScreenCornerState"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>ExtensionClass</span> <span class='hs-conid'>ScreenCornerState</span> <span class='hs-keyword'>where</span>
<a name="line-54"></a> <span class='hs-varid'>initialValue</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ScreenCornerState</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span>
<a name="line-55"></a>
<a name="line-56"></a><a name="addScreenCorner"></a><span class='hs-comment'>-- | Add one single @X ()@ action to a screen corner</span>
<a name="line-57"></a><span class='hs-definition'>addScreenCorner</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ScreenCorner</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span>
<a name="line-58"></a><span class='hs-definition'>addScreenCorner</span> <span class='hs-varid'>corner</span> <span class='hs-varid'>xF</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-59"></a>
<a name="line-60"></a> <span class='hs-conid'>ScreenCornerState</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>XS</span><span class='hs-varop'>.</span><span class='hs-varid'>get</span>
<a name="line-61"></a> <span class='hs-layout'>(</span><span class='hs-varid'>win</span><span class='hs-layout'>,</span><span class='hs-varid'>xFunc</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>find</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-varid'>sc</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>sc</span> <span class='hs-varop'>==</span> <span class='hs-varid'>corner</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>toList</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-62"></a>
<a name="line-63"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>xF'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-varid'>xF'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>xF</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- chain X actions</span>
<a name="line-64"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>flip</span> <span class='hs-conid'>(,)</span> <span class='hs-varid'>xF</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>createWindowAt</span> <span class='hs-varid'>corner</span>
<a name="line-65"></a>
<a name="line-66"></a> <span class='hs-conid'>XS</span><span class='hs-varop'>.</span><span class='hs-varid'>modify</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>ScreenCornerState</span> <span class='hs-varid'>m'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ScreenCornerState</span> <span class='hs-varop'>$</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>win</span> <span class='hs-layout'>(</span><span class='hs-varid'>corner</span><span class='hs-layout'>,</span><span class='hs-varid'>xFunc</span><span class='hs-layout'>)</span> <span class='hs-varid'>m'</span>
<a name="line-67"></a>
<a name="line-68"></a><a name="addScreenCorners"></a><span class='hs-comment'>-- | Add a list of @(ScreenCorner, X ())@ tuples</span>
<a name="line-69"></a><span class='hs-definition'>addScreenCorners</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span> <span class='hs-layout'>(</span><span class='hs-conid'>ScreenCorner</span><span class='hs-layout'>,</span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span>
<a name="line-70"></a><span class='hs-definition'>addScreenCorners</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapM_</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>corner</span><span class='hs-layout'>,</span> <span class='hs-varid'>xF</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>addScreenCorner</span> <span class='hs-varid'>corner</span> <span class='hs-varid'>xF</span><span class='hs-layout'>)</span>
<a name="line-71"></a>
<a name="line-72"></a>
<a name="line-73"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-74"></a><span class='hs-comment'>-- Xlib functions</span>
<a name="line-75"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-76"></a>
<a name="line-77"></a><a name="createWindowAt"></a><span class='hs-comment'>-- "Translate" a ScreenCorner to real (x,y) Positions</span>
<a name="line-78"></a><span class='hs-definition'>createWindowAt</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ScreenCorner</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>Window</span>
<a name="line-79"></a><span class='hs-definition'>createWindowAt</span> <span class='hs-conid'>SCUpperLeft</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>createWindowAt'</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span>
<a name="line-80"></a><span class='hs-definition'>createWindowAt</span> <span class='hs-conid'>SCUpperRight</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withDisplay</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>dpy</span> <span class='hs-keyglyph'>-></span>
<a name="line-81"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>displayWidth</span> <span class='hs-varid'>dpy</span> <span class='hs-layout'>(</span><span class='hs-varid'>defaultScreen</span> <span class='hs-varid'>dpy</span><span class='hs-layout'>)</span> <span class='hs-comment'>-</span> <span class='hs-num'>1</span>
<a name="line-82"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>createWindowAt'</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span>
<a name="line-83"></a>
<a name="line-84"></a><span class='hs-definition'>createWindowAt</span> <span class='hs-conid'>SCLowerLeft</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withDisplay</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>dpy</span> <span class='hs-keyglyph'>-></span>
<a name="line-85"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>displayHeight</span> <span class='hs-varid'>dpy</span> <span class='hs-layout'>(</span><span class='hs-varid'>defaultScreen</span> <span class='hs-varid'>dpy</span><span class='hs-layout'>)</span> <span class='hs-comment'>-</span> <span class='hs-num'>1</span>
<a name="line-86"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>createWindowAt'</span> <span class='hs-num'>0</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-87"></a>
<a name="line-88"></a><span class='hs-definition'>createWindowAt</span> <span class='hs-conid'>SCLowerRight</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withDisplay</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>dpy</span> <span class='hs-keyglyph'>-></span>
<a name="line-89"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>displayWidth</span> <span class='hs-varid'>dpy</span> <span class='hs-layout'>(</span><span class='hs-varid'>defaultScreen</span> <span class='hs-varid'>dpy</span><span class='hs-layout'>)</span> <span class='hs-comment'>-</span> <span class='hs-num'>1</span>
<a name="line-90"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>displayHeight</span> <span class='hs-varid'>dpy</span> <span class='hs-layout'>(</span><span class='hs-varid'>defaultScreen</span> <span class='hs-varid'>dpy</span><span class='hs-layout'>)</span> <span class='hs-comment'>-</span> <span class='hs-num'>1</span>
<a name="line-91"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>createWindowAt'</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fi</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-92"></a>
<a name="line-93"></a><a name="createWindowAt'"></a><span class='hs-comment'>-- Create a new X window at a (x,y) Position</span>
<a name="line-94"></a><span class='hs-definition'>createWindowAt'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>Window</span>
<a name="line-95"></a><span class='hs-definition'>createWindowAt'</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withDisplay</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>dpy</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-96"></a>
<a name="line-97"></a> <span class='hs-varid'>rootw</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>rootWindow</span> <span class='hs-varid'>dpy</span> <span class='hs-layout'>(</span><span class='hs-varid'>defaultScreen</span> <span class='hs-varid'>dpy</span><span class='hs-layout'>)</span>
<a name="line-98"></a>
<a name="line-99"></a> <span class='hs-keyword'>let</span>
<a name="line-100"></a> <span class='hs-varid'>visual</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>defaultVisualOfScreen</span> <span class='hs-varop'>$</span> <span class='hs-varid'>defaultScreenOfDisplay</span> <span class='hs-varid'>dpy</span>
<a name="line-101"></a> <span class='hs-varid'>attrmask</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cWOverrideRedirect</span>
<a name="line-102"></a>
<a name="line-103"></a> <span class='hs-varid'>w</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>allocaSetWindowAttributes</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>attributes</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-104"></a>
<a name="line-105"></a> <span class='hs-varid'>set_override_redirect</span> <span class='hs-varid'>attributes</span> <span class='hs-conid'>True</span>
<a name="line-106"></a> <span class='hs-varid'>createWindow</span> <span class='hs-varid'>dpy</span> <span class='hs-comment'>-- display</span>
<a name="line-107"></a> <span class='hs-varid'>rootw</span> <span class='hs-comment'>-- parent window</span>
<a name="line-108"></a> <span class='hs-varid'>x</span> <span class='hs-comment'>-- x</span>
<a name="line-109"></a> <span class='hs-varid'>y</span> <span class='hs-comment'>-- y</span>
<a name="line-110"></a> <span class='hs-num'>1</span> <span class='hs-comment'>-- width</span>
<a name="line-111"></a> <span class='hs-num'>1</span> <span class='hs-comment'>-- height</span>
<a name="line-112"></a> <span class='hs-num'>0</span> <span class='hs-comment'>-- border width</span>
<a name="line-113"></a> <span class='hs-num'>0</span> <span class='hs-comment'>-- depth</span>
<a name="line-114"></a> <span class='hs-varid'>inputOnly</span> <span class='hs-comment'>-- class</span>
<a name="line-115"></a> <span class='hs-varid'>visual</span> <span class='hs-comment'>-- visual</span>
<a name="line-116"></a> <span class='hs-varid'>attrmask</span> <span class='hs-comment'>-- valuemask</span>
<a name="line-117"></a> <span class='hs-varid'>attributes</span> <span class='hs-comment'>-- attributes</span>
<a name="line-118"></a>
<a name="line-119"></a> <span class='hs-comment'>-- we only need mouse entry events</span>
<a name="line-120"></a> <span class='hs-varid'>selectInput</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>w</span> <span class='hs-varid'>enterWindowMask</span>
<a name="line-121"></a> <span class='hs-varid'>mapWindow</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>w</span>
<a name="line-122"></a> <span class='hs-varid'>sync</span> <span class='hs-varid'>dpy</span> <span class='hs-conid'>False</span>
<a name="line-123"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>w</span>
<a name="line-124"></a>
<a name="line-125"></a>
<a name="line-126"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-127"></a><span class='hs-comment'>-- Event hook</span>
<a name="line-128"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-129"></a>
<a name="line-130"></a><a name="screenCornerEventHook"></a><span class='hs-comment'>-- | Handle screen corner events</span>
<a name="line-131"></a><span class='hs-definition'>screenCornerEventHook</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Event</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>All</span>
<a name="line-132"></a><span class='hs-definition'>screenCornerEventHook</span> <span class='hs-conid'>CrossingEvent</span> <span class='hs-layout'>{</span> <span class='hs-varid'>ev_window</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>win</span> <span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-133"></a>
<a name="line-134"></a> <span class='hs-conid'>ScreenCornerState</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>XS</span><span class='hs-varop'>.</span><span class='hs-varid'>get</span>
<a name="line-135"></a>
<a name="line-136"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>win</span> <span class='hs-varid'>m</span> <span class='hs-keyword'>of</span>
<a name="line-137"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>xF</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>xF</span>
<a name="line-138"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-139"></a>
<a name="line-140"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>All</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span>
<a name="line-141"></a>
<a name="line-142"></a><span class='hs-definition'>screenCornerEventHook</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>All</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span>
<a name="line-143"></a>
<a name="line-144"></a>
<a name="line-145"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-146"></a><span class='hs-comment'>-- $usage</span>
<a name="line-147"></a><span class='hs-comment'>--</span>
<a name="line-148"></a><span class='hs-comment'>-- This extension adds KDE-like screen corners to XMonad. By moving your cursor</span>
<a name="line-149"></a><span class='hs-comment'>-- into one of your screen corners you can trigger an @X ()@ action, for</span>
<a name="line-150"></a><span class='hs-comment'>-- example @"XMonad.Actions.GridSelect".goToSelected@ or</span>
<a name="line-151"></a><span class='hs-comment'>-- @"XMonad.Actions.CycleWS".nextWS@ etc.</span>
<a name="line-152"></a><span class='hs-comment'>--</span>
<a name="line-153"></a><span class='hs-comment'>-- To use it, import it on top of your @xmonad.hs@:</span>
<a name="line-154"></a><span class='hs-comment'>--</span>
<a name="line-155"></a><span class='hs-comment'>-- > import XMonad.Hooks.ScreenCorners</span>
<a name="line-156"></a><span class='hs-comment'>--</span>
<a name="line-157"></a><span class='hs-comment'>-- Then add your screen corners in our startup hook:</span>
<a name="line-158"></a><span class='hs-comment'>--</span>
<a name="line-159"></a><span class='hs-comment'>-- > myStartupHook = do</span>
<a name="line-160"></a><span class='hs-comment'>-- > ...</span>
<a name="line-161"></a><span class='hs-comment'>-- > addScreenCorner SCUpperRight (goToSelected defaultGSConfig { gs_cellwidth = 200})</span>
<a name="line-162"></a><span class='hs-comment'>-- > addScreenCorners [ (SCLowerRight, nextWS)</span>
<a name="line-163"></a><span class='hs-comment'>-- > , (SCLowerLeft, prevWS)</span>
<a name="line-164"></a><span class='hs-comment'>-- > ]</span>
<a name="line-165"></a><span class='hs-comment'>--</span>
<a name="line-166"></a><span class='hs-comment'>-- And finally wait for screen corner events in your event hook:</span>
<a name="line-167"></a><span class='hs-comment'>--</span>
<a name="line-168"></a><span class='hs-comment'>-- > myEventHook e = do</span>
<a name="line-169"></a><span class='hs-comment'>-- > ...</span>
<a name="line-170"></a><span class='hs-comment'>-- > screenCornerEventHook e</span>
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