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<title>XMonad/Actions/UpdateFocus.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-2"></a><span class='hs-comment'>-- |</span>
<a name="line-3"></a><span class='hs-comment'>-- Module : XMonad.Actions.UpdateFocus</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) Daniel Schoepe</span>
<a name="line-5"></a><span class='hs-comment'>-- License : BSD3-style (see LICENSE)</span>
<a name="line-6"></a><span class='hs-comment'>--</span>
<a name="line-7"></a><span class='hs-comment'>-- Maintainer : Daniel Schoepe <asgaroth_@gmx.de></span>
<a name="line-8"></a><span class='hs-comment'>-- Stability : unstable</span>
<a name="line-9"></a><span class='hs-comment'>-- Portability : unportable</span>
<a name="line-10"></a><span class='hs-comment'>--</span>
<a name="line-11"></a><span class='hs-comment'>-- Updates the focus on mouse move in unfocused windows.</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-14"></a>
<a name="line-15"></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'>UpdateFocus</span> <span class='hs-layout'>(</span>
<a name="line-16"></a> <span class='hs-comment'>-- * Usage</span>
<a name="line-17"></a> <span class='hs-comment'>-- $usage</span>
<a name="line-18"></a> <span class='hs-varid'>focusOnMouseMove</span><span class='hs-layout'>,</span>
<a name="line-19"></a> <span class='hs-varid'>adjustEventInput</span>
<a name="line-20"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-21"></a>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span>
<a name="line-23"></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'>StackSet</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>W</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>X11</span><span class='hs-varop'>.</span><span class='hs-conid'>Xlib</span><span class='hs-varop'>.</span><span class='hs-conid'>Extras</span>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-varid'>when</span><span class='hs-layout'>)</span>
<a name="line-26"></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-27"></a>
<a name="line-28"></a><span class='hs-comment'>-- $usage</span>
<a name="line-29"></a><span class='hs-comment'>-- To make the focus update on mouse movement within an unfocused window, add the</span>
<a name="line-30"></a><span class='hs-comment'>-- following to your @~\/.xmonad\/xmonad.hs@:</span>
<a name="line-31"></a><span class='hs-comment'>--</span>
<a name="line-32"></a><span class='hs-comment'>-- > import XMonad.Actions.UpdateFocus</span>
<a name="line-33"></a><span class='hs-comment'>-- > xmonad $ defaultConfig {</span>
<a name="line-34"></a><span class='hs-comment'>-- > ..</span>
<a name="line-35"></a><span class='hs-comment'>-- > startupHook = adjustEventInput</span>
<a name="line-36"></a><span class='hs-comment'>-- > handleEventHook = focusOnMouseMove</span>
<a name="line-37"></a><span class='hs-comment'>-- > ..</span>
<a name="line-38"></a><span class='hs-comment'>-- > }</span>
<a name="line-39"></a><span class='hs-comment'>--</span>
<a name="line-40"></a><span class='hs-comment'>-- This module is probably only useful when focusFollowsMouse is set to True(default).</span>
<a name="line-41"></a>
<a name="line-42"></a><a name="focusOnMouseMove"></a><span class='hs-comment'>-- | Changes the focus if the mouse is moved within an unfocused window.</span>
<a name="line-43"></a><span class='hs-definition'>focusOnMouseMove</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-44"></a><span class='hs-definition'>focusOnMouseMove</span> <span class='hs-layout'>(</span><span class='hs-conid'>MotionEvent</span> <span class='hs-layout'>{</span> <span class='hs-varid'>ev_x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>ev_y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>y</span><span class='hs-layout'>,</span> <span class='hs-varid'>ev_window</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>root</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-45"></a> <span class='hs-comment'>-- check only every 15 px to avoid excessive calls to translateCoordinates</span>
<a name="line-46"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varop'>`mod`</span> <span class='hs-num'>15</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span> <span class='hs-varop'>||</span> <span class='hs-varid'>y</span> <span class='hs-varop'>`mod`</span> <span class='hs-num'>15</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-47"></a> <span class='hs-varid'>dpy</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asks</span> <span class='hs-varid'>display</span>
<a name="line-48"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>foc</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>withWindowSet</span> <span class='hs-varop'>$</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>peek</span>
<a name="line-49"></a> <span class='hs-comment'>-- get the window under the pointer:</span>
<a name="line-50"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>translateCoordinates</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>root</span> <span class='hs-varid'>root</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-51"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>foc</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>focus</span> <span class='hs-varid'>w</span>
<a name="line-52"></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-53"></a><span class='hs-definition'>focusOnMouseMove</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-54"></a>
<a name="line-55"></a><a name="adjustEventInput"></a><span class='hs-comment'>-- | Adjusts the event mask to pick up pointer movements.</span>
<a name="line-56"></a><span class='hs-definition'>adjustEventInput</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>X</span> <span class='hs-conid'>()</span>
<a name="line-57"></a><span class='hs-definition'>adjustEventInput</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withDisplay</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>dpy</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-58"></a> <span class='hs-varid'>rootw</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asks</span> <span class='hs-varid'>theRoot</span>
<a name="line-59"></a> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>selectInput</span> <span class='hs-varid'>dpy</span> <span class='hs-varid'>rootw</span> <span class='hs-varop'>$</span> <span class='hs-varid'>substructureRedirectMask</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>substructureNotifyMask</span>
<a name="line-60"></a> <span class='hs-varop'>.|.</span> <span class='hs-varid'>enterWindowMask</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>leaveWindowMask</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>structureNotifyMask</span>
<a name="line-61"></a> <span class='hs-varop'>.|.</span> <span class='hs-varid'>buttonPressMask</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>pointerMotionMask</span>
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