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<title>XMonad/Layout/Monitor.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE TypeSynonymInstances, MultiParamTypeClasses, DeriveDataTypeable, PatternGuards #-}</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.Layout.Monitor</span>
<a name="line-6"></a><span class='hs-comment'>-- Copyright : (c) Roman Cheplyaka</span>
<a name="line-7"></a><span class='hs-comment'>-- License : BSD-style (see LICENSE)</span>
<a name="line-8"></a><span class='hs-comment'>--</span>
<a name="line-9"></a><span class='hs-comment'>-- Maintainer : Roman Cheplyaka <roma@ro-che.info></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'>-- Layout modfier for displaying some window (monitor) above other windows</span>
<a name="line-14"></a><span class='hs-comment'>--</span>
<a name="line-15"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<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'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>Monitor</span> <span class='hs-layout'>(</span>
<a name="line-17"></a> <span class='hs-comment'>-- * Usage</span>
<a name="line-18"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-19"></a>
<a name="line-20"></a> <span class='hs-comment'>-- * Hints and issues</span>
<a name="line-21"></a> <span class='hs-comment'>-- $hints</span>
<a name="line-22"></a>
<a name="line-23"></a> <span class='hs-conid'>Monitor</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-24"></a> <span class='hs-varid'>monitor</span><span class='hs-layout'>,</span>
<a name="line-25"></a> <span class='hs-conid'>Property</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-26"></a> <span class='hs-conid'>MonitorMessage</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-27"></a> <span class='hs-varid'>doHideIgnore</span><span class='hs-layout'>,</span>
<a name="line-28"></a> <span class='hs-varid'>manageMonitor</span>
<a name="line-29"></a>
<a name="line-30"></a> <span class='hs-comment'>-- * TODO</span>
<a name="line-31"></a> <span class='hs-comment'>-- $todo</span>
<a name="line-32"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-33"></a>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span>
<a name="line-35"></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-36"></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'>WindowProperties</span>
<a name="line-37"></a><span class='hs-keyword'>import</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'>ManageHelpers</span> <span class='hs-layout'>(</span><span class='hs-varid'>doHideIgnore</span><span class='hs-layout'>)</span>
<a name="line-38"></a><span class='hs-keyword'>import</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'>FadeInactive</span> <span class='hs-layout'>(</span><span class='hs-varid'>setOpacity</span><span class='hs-layout'>)</span>
<a name="line-39"></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-40"></a>
<a name="line-41"></a><span class='hs-comment'>-- $usage</span>
<a name="line-42"></a><span class='hs-comment'>-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:</span>
<a name="line-43"></a><span class='hs-comment'>--</span>
<a name="line-44"></a><span class='hs-comment'>-- > import XMonad.Layout.Monitor</span>
<a name="line-45"></a><span class='hs-comment'>--</span>
<a name="line-46"></a><span class='hs-comment'>-- Define 'Monitor' record. 'monitor' can be used as a template. At least 'prop'</span>
<a name="line-47"></a><span class='hs-comment'>-- and 'rect' should be set here. Also consider setting 'persistent' to True.</span>
<a name="line-48"></a><span class='hs-comment'>--</span>
<a name="line-49"></a><span class='hs-comment'>-- Minimal example:</span>
<a name="line-50"></a><span class='hs-comment'>--</span>
<a name="line-51"></a><span class='hs-comment'>-- > myMonitor = monitor</span>
<a name="line-52"></a><span class='hs-comment'>-- > { prop = ClassName "SomeClass"</span>
<a name="line-53"></a><span class='hs-comment'>-- > , rect = Rectangle 0 0 40 20 -- rectangle 40x20 in upper left corner</span>
<a name="line-54"></a><span class='hs-comment'>-- > }</span>
<a name="line-55"></a><span class='hs-comment'>--</span>
<a name="line-56"></a><span class='hs-comment'>-- More interesting example:</span>
<a name="line-57"></a><span class='hs-comment'>--</span>
<a name="line-58"></a><span class='hs-comment'>-- > clock = monitor {</span>
<a name="line-59"></a><span class='hs-comment'>-- > -- Cairo-clock creates 2 windows with the same classname, thus also using title</span>
<a name="line-60"></a><span class='hs-comment'>-- > prop = ClassName "Cairo-clock" `And` Title "MacSlow's Cairo-Clock"</span>
<a name="line-61"></a><span class='hs-comment'>-- > -- rectangle 150x150 in lower right corner, assuming 1280x800 resolution</span>
<a name="line-62"></a><span class='hs-comment'>-- > , rect = Rectangle (1280-150) (800-150) 150 150</span>
<a name="line-63"></a><span class='hs-comment'>-- > -- avoid flickering</span>
<a name="line-64"></a><span class='hs-comment'>-- > , persistent = True</span>
<a name="line-65"></a><span class='hs-comment'>-- > -- make the window transparent</span>
<a name="line-66"></a><span class='hs-comment'>-- > , opacity = 0.6</span>
<a name="line-67"></a><span class='hs-comment'>-- > -- hide on start</span>
<a name="line-68"></a><span class='hs-comment'>-- > , visible = False</span>
<a name="line-69"></a><span class='hs-comment'>-- > -- assign it a name to be able to toggle it independently of others</span>
<a name="line-70"></a><span class='hs-comment'>-- > , name = "clock"</span>
<a name="line-71"></a><span class='hs-comment'>-- > }</span>
<a name="line-72"></a><span class='hs-comment'>--</span>
<a name="line-73"></a><span class='hs-comment'>-- Add ManageHook to de-manage monitor windows and apply opacity settings.</span>
<a name="line-74"></a><span class='hs-comment'>--</span>
<a name="line-75"></a><span class='hs-comment'>-- > manageHook = myManageHook <+> manageMonitor clock</span>
<a name="line-76"></a><span class='hs-comment'>--</span>
<a name="line-77"></a><span class='hs-comment'>-- Apply layout modifier.</span>
<a name="line-78"></a><span class='hs-comment'>--</span>
<a name="line-79"></a><span class='hs-comment'>-- > myLayout = ModifiedLayout clock $ tall ||| Full ||| ...</span>
<a name="line-80"></a><span class='hs-comment'>--</span>
<a name="line-81"></a><span class='hs-comment'>-- After that, if there exists a window with specified properties, it will be</span>
<a name="line-82"></a><span class='hs-comment'>-- displayed on top of all /tiled/ (not floated) windows on specified</span>
<a name="line-83"></a><span class='hs-comment'>-- position.</span>
<a name="line-84"></a><span class='hs-comment'>--</span>
<a name="line-85"></a><span class='hs-comment'>-- It's also useful to add some keybinding to toggle monitor visibility:</span>
<a name="line-86"></a><span class='hs-comment'>--</span>
<a name="line-87"></a><span class='hs-comment'>-- > , ((mod1Mask, xK_u ), broadcastMessage ToggleMonitor >> refresh)</span>
<a name="line-88"></a><span class='hs-comment'>--</span>
<a name="line-89"></a><span class='hs-comment'>-- Screenshot: <<a href="http://www.haskell.org/haskellwiki/Image:Xmonad-clock.png">http://www.haskell.org/haskellwiki/Image:Xmonad-clock.png</a>></span>
<a name="line-90"></a>
<a name="line-91"></a><a name="Monitor"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Monitor</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Monitor</span>
<a name="line-92"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>prop</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Property</span> <span class='hs-comment'>-- ^ property which uniquely identifies monitor window</span>
<a name="line-93"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>rect</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rectangle</span> <span class='hs-comment'>-- ^ specifies where to put monitor</span>
<a name="line-94"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>visible</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-comment'>-- ^ is it visible by default?</span>
<a name="line-95"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ name of monitor (useful when we have many of them)</span>
<a name="line-96"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>persistent</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-comment'>-- ^ is it shown on all layouts?</span>
<a name="line-97"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>opacity</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rational</span> <span class='hs-comment'>-- ^ opacity level</span>
<a name="line-98"></a> <span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Read</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-99"></a>
<a name="line-100"></a><a name="monitor"></a><span class='hs-comment'>-- | Template for 'Monitor' record. At least 'prop' and 'rect' should be</span>
<a name="line-101"></a><span class='hs-comment'>-- redefined. Default settings: 'visible' is 'True', 'persistent' is 'False'.</span>
<a name="line-102"></a><span class='hs-definition'>monitor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monitor</span> <span class='hs-varid'>a</span>
<a name="line-103"></a><span class='hs-definition'>monitor</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Monitor</span>
<a name="line-104"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>prop</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Const</span> <span class='hs-conid'>False</span>
<a name="line-105"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>rect</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Rectangle</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span>
<a name="line-106"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>visible</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-107"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>""</span>
<a name="line-108"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>persistent</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-109"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>opacity</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>1</span>
<a name="line-110"></a> <span class='hs-layout'>}</span>
<a name="line-111"></a>
<a name="line-112"></a><a name="MonitorMessage"></a><span class='hs-comment'>-- | Messages without names affect all monitors. Messages with names affect only</span>
<a name="line-113"></a><a name="MonitorMessage"></a><span class='hs-comment'>-- monitors whose names match.</span>
<a name="line-114"></a><a name="MonitorMessage"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>MonitorMessage</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ToggleMonitor</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ShowMonitor</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>HideMonitor</span>
<a name="line-115"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ToggleMonitorNamed</span> <span class='hs-conid'>String</span>
<a name="line-116"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ShowMonitorNamed</span> <span class='hs-conid'>String</span>
<a name="line-117"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>HideMonitorNamed</span> <span class='hs-conid'>String</span>
<a name="line-118"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Read</span><span class='hs-layout'>,</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span><span class='hs-conid'>Typeable</span><span class='hs-layout'>)</span>
<a name="line-119"></a><a name="instance%20Message%20MonitorMessage%20withMonitor%20::%20Property%20-%3e%20a%20-%3e%20(Window%20-%3e%20X%20a)%20-%3e%20X%20a%20withMonitor%20p%20a%20fn%20=%20do%20monitorWindows%20%3c-%20allWithProperty%20p%20case%20monitorWindows%20of%20%5b%5d%20-%3e%20return%20a%20w:_%20-%3e%20fn%20w%20instance%20LayoutModifier%20Monitor%20Window"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Message</span> <span class='hs-conid'>MonitorMessage</span>
<a name="line-120"></a>
<a name="line-121"></a><a name="withMonitor"></a><span class='hs-definition'>withMonitor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Property</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-varid'>a</span>
<a name="line-122"></a><span class='hs-definition'>withMonitor</span> <span class='hs-varid'>p</span> <span class='hs-varid'>a</span> <span class='hs-varid'>fn</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-123"></a> <span class='hs-varid'>monitorWindows</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>allWithProperty</span> <span class='hs-varid'>p</span>
<a name="line-124"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>monitorWindows</span> <span class='hs-keyword'>of</span>
<a name="line-125"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>a</span>
<a name="line-126"></a> <span class='hs-varid'>w</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fn</span> <span class='hs-varid'>w</span>
<a name="line-127"></a>
<a name="line-128"></a><a name="instance%20LayoutModifier%20Monitor%20Window"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>LayoutModifier</span> <span class='hs-conid'>Monitor</span> <span class='hs-conid'>Window</span> <span class='hs-keyword'>where</span>
<a name="line-129"></a> <span class='hs-varid'>redoLayout</span> <span class='hs-varid'>mon</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>rects</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withMonitor</span> <span class='hs-layout'>(</span><span class='hs-varid'>prop</span> <span class='hs-varid'>mon</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rects</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>w</span> <span class='hs-keyglyph'>-></span>
<a name="line-130"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>visible</span> <span class='hs-varid'>mon</span>
<a name="line-131"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>tileWindow</span> <span class='hs-varid'>w</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect</span> <span class='hs-varid'>mon</span><span class='hs-layout'>)</span>
<a name="line-132"></a> <span class='hs-varid'>reveal</span> <span class='hs-varid'>w</span>
<a name="line-133"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>rect</span> <span class='hs-varid'>mon</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>rects</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-134"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>hide</span> <span class='hs-varid'>w</span>
<a name="line-135"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>rects</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-136"></a> <span class='hs-varid'>handleMess</span> <span class='hs-varid'>mon</span> <span class='hs-varid'>mess</span>
<a name="line-137"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>ToggleMonitor</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>mess</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mon</span> <span class='hs-layout'>{</span> <span class='hs-varid'>visible</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>visible</span> <span class='hs-varid'>mon</span> <span class='hs-layout'>}</span>
<a name="line-138"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>ToggleMonitorNamed</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>mess</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span>
<a name="line-139"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>name</span> <span class='hs-varid'>mon</span> <span class='hs-varop'>==</span> <span class='hs-varid'>n</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mon</span> <span class='hs-layout'>{</span> <span class='hs-varid'>visible</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>visible</span> <span class='hs-varid'>mon</span> <span class='hs-layout'>}</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Nothing</span>
<a name="line-140"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>ShowMonitor</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>mess</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mon</span> <span class='hs-layout'>{</span> <span class='hs-varid'>visible</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span> <span class='hs-layout'>}</span>
<a name="line-141"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>ShowMonitorNamed</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>mess</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span>
<a name="line-142"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>name</span> <span class='hs-varid'>mon</span> <span class='hs-varop'>==</span> <span class='hs-varid'>n</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mon</span> <span class='hs-layout'>{</span> <span class='hs-varid'>visible</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span> <span class='hs-layout'>}</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Nothing</span>
<a name="line-143"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>HideMonitor</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>mess</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mon</span> <span class='hs-layout'>{</span> <span class='hs-varid'>visible</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span> <span class='hs-layout'>}</span>
<a name="line-144"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>HideMonitorNamed</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>mess</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span>
<a name="line-145"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>name</span> <span class='hs-varid'>mon</span> <span class='hs-varop'>==</span> <span class='hs-varid'>n</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mon</span> <span class='hs-layout'>{</span> <span class='hs-varid'>visible</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span> <span class='hs-layout'>}</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Nothing</span>
<a name="line-146"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>Hide</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>mess</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>persistent</span> <span class='hs-varid'>mon</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>withMonitor</span> <span class='hs-layout'>(</span><span class='hs-varid'>prop</span> <span class='hs-varid'>mon</span><span class='hs-layout'>)</span> <span class='hs-conid'>()</span> <span class='hs-varid'>hide</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-147"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-148"></a>
<a name="line-149"></a><a name="manageMonitor"></a><span class='hs-comment'>-- | ManageHook which demanages monitor window and applies opacity settings.</span>
<a name="line-150"></a><span class='hs-definition'>manageMonitor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monitor</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ManageHook</span>
<a name="line-151"></a><span class='hs-definition'>manageMonitor</span> <span class='hs-varid'>mon</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>propertyToQuery</span> <span class='hs-layout'>(</span><span class='hs-varid'>prop</span> <span class='hs-varid'>mon</span><span class='hs-layout'>)</span> <span class='hs-varop'>--></span> <span class='hs-keyword'>do</span>
<a name="line-152"></a> <span class='hs-varid'>w</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ask</span>
<a name="line-153"></a> <span class='hs-varid'>liftX</span> <span class='hs-varop'>$</span> <span class='hs-varid'>setOpacity</span> <span class='hs-varid'>w</span> <span class='hs-varop'>$</span> <span class='hs-varid'>opacity</span> <span class='hs-varid'>mon</span>
<a name="line-154"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>persistent</span> <span class='hs-varid'>mon</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>doIgnore</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>doHideIgnore</span>
<a name="line-155"></a>
<a name="line-156"></a><span class='hs-comment'>-- $hints</span>
<a name="line-157"></a><span class='hs-comment'>-- - This module assumes that there is only one window satisfying property exists.</span>
<a name="line-158"></a><span class='hs-comment'>--</span>
<a name="line-159"></a><span class='hs-comment'>-- - If your monitor is available on /all/ layouts, set</span>
<a name="line-160"></a><span class='hs-comment'>-- 'persistent' to 'True' to avoid unnecessary</span>
<a name="line-161"></a><span class='hs-comment'>-- flickering. You can still toggle monitor with a keybinding.</span>
<a name="line-162"></a><span class='hs-comment'>--</span>
<a name="line-163"></a><span class='hs-comment'>-- - You can use several monitors with nested modifiers. Give them names</span>
<a name="line-164"></a><span class='hs-comment'>--- to be able to toggle them independently.</span>
<a name="line-165"></a><span class='hs-comment'>--</span>
<a name="line-166"></a><span class='hs-comment'>-- - You can display monitor only on specific workspaces with</span>
<a name="line-167"></a><span class='hs-comment'>-- "XMonad.Layout.PerWorkspace".</span>
<a name="line-168"></a>
<a name="line-169"></a><span class='hs-comment'>-- $todo</span>
<a name="line-170"></a><span class='hs-comment'>-- - make Monitor remember the window it manages</span>
<a name="line-171"></a><span class='hs-comment'>--</span>
<a name="line-172"></a><span class='hs-comment'>-- - specify position relative to the screen</span>
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