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<title>XMonad/Actions/MouseResize.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE GeneralizedNewtypeDeriving, MultiParamTypeClasses, PatternGuards, TypeSynonymInstances #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-4"></a><span class='hs-comment'>-- |</span>
<a name="line-5"></a><span class='hs-comment'>-- Module : XMonad.Actions.MouseResize</span>
<a name="line-6"></a><span class='hs-comment'>-- Copyright : (c) 2007 Andrea Rossato</span>
<a name="line-7"></a><span class='hs-comment'>-- License : BSD-style (see xmonad/LICENSE)</span>
<a name="line-8"></a><span class='hs-comment'>--</span>
<a name="line-9"></a><span class='hs-comment'>-- Maintainer : andrea.rossato@unibz.it</span>
<a name="line-10"></a><span class='hs-comment'>-- Stability : unstable</span>
<a name="line-11"></a><span class='hs-comment'>-- Portability : unportable</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- A layout modifier to resize windows with the mouse by grabbing the</span>
<a name="line-14"></a><span class='hs-comment'>-- window's lower right corner.</span>
<a name="line-15"></a><span class='hs-comment'>--</span>
<a name="line-16"></a><span class='hs-comment'>-- This module must be used together with "XMonad.Layout.WindowArranger".</span>
<a name="line-17"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-18"></a>
<a name="line-19"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Actions</span><span class='hs-varop'>.</span><span class='hs-conid'>MouseResize</span>
<a name="line-20"></a> <span class='hs-layout'>(</span> <span class='hs-comment'>-- * Usage:</span>
<a name="line-21"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-22"></a> <span class='hs-varid'>mouseResize</span>
<a name="line-23"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>MouseResize</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-24"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-25"></a>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span>
<a name="line-28"></a>
<a name="line-29"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>Decoration</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>LayoutModifier</span>
<a name="line-32"></a>
<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'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>WindowArranger</span>
<a name="line-34"></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>
<a name="line-35"></a>
<a name="line-36"></a><span class='hs-comment'>-- $usage</span>
<a name="line-37"></a><span class='hs-comment'>-- Usually this module is used to create layouts, but you can also use</span>
<a name="line-38"></a><span class='hs-comment'>-- it to resize windows in any layout, together with the</span>
<a name="line-39"></a><span class='hs-comment'>-- "XMonad.Layout.WindowArranger". For usage example see</span>
<a name="line-40"></a><span class='hs-comment'>-- "XMonad.Layout.SimpleFloat" or "XMonad.Layout.DecorationMadness".</span>
<a name="line-41"></a><span class='hs-comment'>--</span>
<a name="line-42"></a><span class='hs-comment'>-- You can use this module with the following in your</span>
<a name="line-43"></a><span class='hs-comment'>-- @~\/.xmonad\/xmonad.hs@:</span>
<a name="line-44"></a><span class='hs-comment'>--</span>
<a name="line-45"></a><span class='hs-comment'>-- > import XMonad.Actions.MouseResize</span>
<a name="line-46"></a><span class='hs-comment'>-- > import XMonad.Layout.WindowArranger</span>
<a name="line-47"></a><span class='hs-comment'>--</span>
<a name="line-48"></a><span class='hs-comment'>-- Then edit your @layoutHook@ by modifying a given layout:</span>
<a name="line-49"></a><span class='hs-comment'>--</span>
<a name="line-50"></a><span class='hs-comment'>-- > myLayout = mouseResize $ windowArrange $ layoutHook defaultConfig</span>
<a name="line-51"></a><span class='hs-comment'>--</span>
<a name="line-52"></a><span class='hs-comment'>-- and then:</span>
<a name="line-53"></a><span class='hs-comment'>--</span>
<a name="line-54"></a><span class='hs-comment'>-- > main = xmonad defaultConfig { layoutHook = myLayout }</span>
<a name="line-55"></a><span class='hs-comment'>--</span>
<a name="line-56"></a><span class='hs-comment'>-- For more detailed instructions on editing the layoutHook see:</span>
<a name="line-57"></a><span class='hs-comment'>--</span>
<a name="line-58"></a><span class='hs-comment'>-- "XMonad.Doc.Extending#Editing_the_layout_hook"</span>
<a name="line-59"></a>
<a name="line-60"></a><a name="mouseResize"></a><span class='hs-definition'>mouseResize</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ModifiedLayout</span> <span class='hs-conid'>MouseResize</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-61"></a><span class='hs-definition'>mouseResize</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ModifiedLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>MR</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-62"></a>
<a name="line-63"></a><a name="MouseResize"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>MouseResize</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>MR</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-conid'>Rectangle</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-64"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>MouseResize</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <span class='hs-varid'>show</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>""</span>
<a name="line-65"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Read</span> <span class='hs-layout'>(</span><span class='hs-conid'>MouseResize</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <span class='hs-varid'>readsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>MR</span> <span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-66"></a>
<a name="line-67"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>LayoutModifier</span> <span class='hs-conid'>MouseResize</span> <span class='hs-conid'>Window</span> <span class='hs-keyword'>where</span>
<a name="line-68"></a> <span class='hs-varid'>redoLayout</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>wrs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>wrs</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-69"></a> <span class='hs-varid'>redoLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>MR</span> <span class='hs-varid'>st</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>wrs</span>
<a name="line-70"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>st</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>initState</span> <span class='hs-varop'>>>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>nst</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>wrs</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>MR</span> <span class='hs-varid'>nst</span><span class='hs-layout'>)</span>
<a name="line-71"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>processState</span> <span class='hs-varop'>>>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>nst</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>wrs</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>MR</span> <span class='hs-varid'>nst</span><span class='hs-layout'>)</span>
<a name="line-72"></a> <span class='hs-keyword'>where</span>
<a name="line-73"></a> <span class='hs-varid'>wrs'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>wrs_to_state</span> <span class='hs-conid'>[]</span> <span class='hs-varop'>.</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varid'>isInStack</span> <span class='hs-varid'>s</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fst</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>wrs</span>
<a name="line-74"></a> <span class='hs-varid'>initState</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>createInputWindow</span> <span class='hs-varid'>wrs'</span>
<a name="line-75"></a> <span class='hs-varid'>processState</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapM</span> <span class='hs-layout'>(</span><span class='hs-varid'>deleteInputWin</span> <span class='hs-varop'>.</span> <span class='hs-varid'>snd</span><span class='hs-layout'>)</span> <span class='hs-varid'>st</span> <span class='hs-varop'>>></span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>createInputWindow</span> <span class='hs-varid'>wrs'</span>
<a name="line-76"></a>
<a name="line-77"></a> <span class='hs-varid'>inputRectangle</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>wh</span> <span class='hs-varid'>ht</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Rectangle</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>wh</span> <span class='hs-comment'>-</span> <span class='hs-num'>5</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>ht</span> <span class='hs-comment'>-</span> <span class='hs-num'>5</span><span class='hs-layout'>)</span> <span class='hs-num'>10</span> <span class='hs-num'>10</span>
<a name="line-78"></a>
<a name="line-79"></a> <span class='hs-varid'>wrs_to_state</span> <span class='hs-varid'>rs</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-80"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>ir</span> <span class='hs-varop'>`isVisible`</span> <span class='hs-varid'>rs</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>Just</span> <span class='hs-varid'>ir</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>wrs_to_state</span> <span class='hs-layout'>(</span><span class='hs-varid'>r</span><span class='hs-conop'>:</span><span class='hs-varid'>ir</span><span class='hs-conop'>:</span><span class='hs-varid'>rs</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-81"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>wrs_to_state</span> <span class='hs-layout'>(</span><span class='hs-varid'>r</span><span class='hs-conop'>:</span> <span class='hs-varid'>rs</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-82"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>ir</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>inputRectangle</span> <span class='hs-varid'>r</span>
<a name="line-83"></a> <span class='hs-varid'>wrs_to_state</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-84"></a>
<a name="line-85"></a> <span class='hs-varid'>handleMess</span> <span class='hs-layout'>(</span><span class='hs-conid'>MR</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span>
<a name="line-86"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Event</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>handleResize</span> <span class='hs-varid'>s</span> <span class='hs-varid'>e</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-87"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>Hide</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>releaseResources</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>MR</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-88"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>ReleaseResources</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>releaseResources</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>MR</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-89"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>releaseResources</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapM_</span> <span class='hs-layout'>(</span><span class='hs-varid'>deleteInputWin</span> <span class='hs-varop'>.</span> <span class='hs-varid'>snd</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-90"></a> <span class='hs-varid'>handleMess</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-91"></a>
<a name="line-92"></a><a name="handleResize"></a><span class='hs-definition'>handleResize</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Window</span><span class='hs-layout'>,</span><span class='hs-conid'>Rectangle</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</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'>()</span>
<a name="line-93"></a><span class='hs-definition'>handleResize</span> <span class='hs-varid'>st</span> <span class='hs-conid'>ButtonEvent</span> <span class='hs-layout'>{</span> <span class='hs-varid'>ev_window</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ew</span><span class='hs-layout'>,</span> <span class='hs-varid'>ev_event_type</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>et</span> <span class='hs-layout'>}</span>
<a name="line-94"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>et</span> <span class='hs-varop'>==</span> <span class='hs-varid'>buttonPress</span>
<a name="line-95"></a> <span class='hs-layout'>,</span> <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-conid'>Rectangle</span> <span class='hs-varid'>wx</span> <span class='hs-varid'>wy</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getWin</span> <span class='hs-varid'>ew</span> <span class='hs-varid'>st</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-96"></a> <span class='hs-varid'>focus</span> <span class='hs-varid'>w</span>
<a name="line-97"></a> <span class='hs-varid'>mouseDrag</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-98"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>rect</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Rectangle</span> <span class='hs-varid'>wx</span> <span class='hs-varid'>wy</span>
<a name="line-99"></a> <span class='hs-layout'>(</span><span class='hs-varid'>max</span> <span class='hs-num'>1</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fi</span> <span class='hs-varop'>$</span> <span class='hs-varid'>x</span> <span class='hs-comment'>-</span> <span class='hs-varid'>wx</span><span class='hs-layout'>)</span>
<a name="line-100"></a> <span class='hs-layout'>(</span><span class='hs-varid'>max</span> <span class='hs-num'>1</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fi</span> <span class='hs-varop'>$</span> <span class='hs-varid'>y</span> <span class='hs-comment'>-</span> <span class='hs-varid'>wy</span><span class='hs-layout'>)</span>
<a name="line-101"></a> <span class='hs-varid'>sendMessage</span> <span class='hs-layout'>(</span><span class='hs-conid'>SetGeometry</span> <span class='hs-varid'>rect</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-102"></a>
<a name="line-103"></a> <span class='hs-keyword'>where</span>
<a name="line-104"></a> <span class='hs-varid'>getWin</span> <span class='hs-varid'>w</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>win</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-varid'>tw</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-105"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>w'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>tw</span>
<a name="line-106"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>w</span> <span class='hs-varop'>==</span> <span class='hs-varid'>w'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>win</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-107"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getWin</span> <span class='hs-varid'>w</span> <span class='hs-varid'>xs</span>
<a name="line-108"></a> <span class='hs-varid'>getWin</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-109"></a><span class='hs-definition'>handleResize</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-110"></a>
<a name="line-111"></a><a name="createInputWindow"></a><span class='hs-definition'>createInputWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Window</span><span class='hs-layout'>,</span><span class='hs-conid'>Rectangle</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Rectangle</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Window</span><span class='hs-layout'>,</span><span class='hs-conid'>Rectangle</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span>
<a name="line-112"></a><span class='hs-definition'>createInputWindow</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-varid'>mr</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-113"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>mr</span> <span class='hs-keyword'>of</span>
<a name="line-114"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>tr</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'>d</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-115"></a> <span class='hs-varid'>tw</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mkInputWindow</span> <span class='hs-varid'>d</span> <span class='hs-varid'>tr</span>
<a name="line-116"></a> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>selectInput</span> <span class='hs-varid'>d</span> <span class='hs-varid'>tw</span> <span class='hs-layout'>(</span><span class='hs-varid'>exposureMask</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>buttonPressMask</span><span class='hs-layout'>)</span>
<a name="line-117"></a> <span class='hs-varid'>showWindow</span> <span class='hs-varid'>tw</span>
<a name="line-118"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>tw</span><span class='hs-layout'>)</span>
<a name="line-119"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-120"></a>
<a name="line-121"></a><a name="deleteInputWin"></a><span class='hs-definition'>deleteInputWin</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span>
<a name="line-122"></a><span class='hs-definition'>deleteInputWin</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-varid'>deleteWindow</span>
<a name="line-123"></a>
<a name="line-124"></a><a name="mkInputWindow"></a><span class='hs-definition'>mkInputWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Display</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-conid'>Window</span>
<a name="line-125"></a><span class='hs-definition'>mkInputWindow</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-126"></a> <span class='hs-varid'>rw</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asks</span> <span class='hs-varid'>theRoot</span>
<a name="line-127"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>screen</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>defaultScreenOfDisplay</span> <span class='hs-varid'>d</span>
<a name="line-128"></a> <span class='hs-varid'>visual</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>defaultVisualOfScreen</span> <span class='hs-varid'>screen</span>
<a name="line-129"></a> <span class='hs-varid'>attrmask</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cWOverrideRedirect</span>
<a name="line-130"></a> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>allocaSetWindowAttributes</span> <span class='hs-varop'>$</span>
<a name="line-131"></a> <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-132"></a> <span class='hs-varid'>set_override_redirect</span> <span class='hs-varid'>attributes</span> <span class='hs-conid'>True</span>
<a name="line-133"></a> <span class='hs-varid'>createWindow</span> <span class='hs-varid'>d</span> <span class='hs-varid'>rw</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-varid'>inputOnly</span> <span class='hs-varid'>visual</span> <span class='hs-varid'>attrmask</span> <span class='hs-varid'>attributes</span>
</pre></body>
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