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<title>XMonad/Layout/Reflect.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses, DeriveDataTypeable, 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.Layout.Reflect</span>
<a name="line-6"></a><span class='hs-comment'>-- Copyright : (c) Brent Yorgey</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 : <byorgey@gmail.com></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'>-- Reflect a layout horizontally or vertically.</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'>Layout</span><span class='hs-varop'>.</span><span class='hs-conid'>Reflect</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-varid'>reflectHoriz</span><span class='hs-layout'>,</span> <span class='hs-varid'>reflectVert</span><span class='hs-layout'>,</span>
<a name="line-21"></a> <span class='hs-conid'>REFLECTX</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>REFLECTY</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-22"></a>
<a name="line-23"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-24"></a>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Core</span>
<a name="line-26"></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-layout'>(</span><span class='hs-conid'>Rectangle</span><span class='hs-layout'>(</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>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Arrow</span> <span class='hs-layout'>(</span><span class='hs-varid'>second</span><span class='hs-layout'>)</span>
<a name="line-28"></a>
<a name="line-29"></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-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'>MultiToggle</span>
<a name="line-31"></a>
<a name="line-32"></a><span class='hs-comment'>-- $usage</span>
<a name="line-33"></a><span class='hs-comment'>-- You can use this module by importing it into your @~\/.xmonad\/xmonad.hs@ file:</span>
<a name="line-34"></a><span class='hs-comment'>--</span>
<a name="line-35"></a><span class='hs-comment'>-- > import XMonad.Layout.Reflect</span>
<a name="line-36"></a><span class='hs-comment'>--</span>
<a name="line-37"></a><span class='hs-comment'>-- and modifying your layoutHook as follows (for example):</span>
<a name="line-38"></a><span class='hs-comment'>--</span>
<a name="line-39"></a><span class='hs-comment'>-- > layoutHook = reflectHoriz $ Tall 1 (3/100) (1/2) -- put master pane on the right</span>
<a name="line-40"></a><span class='hs-comment'>--</span>
<a name="line-41"></a><span class='hs-comment'>-- 'reflectHoriz' and 'reflectVert' can be applied to any sort of</span>
<a name="line-42"></a><span class='hs-comment'>-- layout (including Mirrored layouts) and will simply flip the</span>
<a name="line-43"></a><span class='hs-comment'>-- physical layout of the windows vertically or horizontally.</span>
<a name="line-44"></a><span class='hs-comment'>--</span>
<a name="line-45"></a><span class='hs-comment'>-- "XMonad.Layout.MultiToggle" transformers are also provided for</span>
<a name="line-46"></a><span class='hs-comment'>-- toggling layouts between reflected\/non-reflected with a keybinding.</span>
<a name="line-47"></a><span class='hs-comment'>-- To use this feature, you will also need to import the MultiToggle</span>
<a name="line-48"></a><span class='hs-comment'>-- module:</span>
<a name="line-49"></a><span class='hs-comment'>--</span>
<a name="line-50"></a><span class='hs-comment'>-- > import XMonad.Layout.MultiToggle</span>
<a name="line-51"></a><span class='hs-comment'>--</span>
<a name="line-52"></a><span class='hs-comment'>-- Next, add one or more toggles to your layout. For example, to allow</span>
<a name="line-53"></a><span class='hs-comment'>-- separate toggling of both vertical and horizontal reflection:</span>
<a name="line-54"></a><span class='hs-comment'>--</span>
<a name="line-55"></a><span class='hs-comment'>-- > layoutHook = mkToggle (single REFLECTX) $</span>
<a name="line-56"></a><span class='hs-comment'>-- > mkToggle (single REFLECTY) $</span>
<a name="line-57"></a><span class='hs-comment'>-- > (tiled ||| Mirror tiled ||| ...) -- whatever layouts you use</span>
<a name="line-58"></a><span class='hs-comment'>--</span>
<a name="line-59"></a><span class='hs-comment'>-- Finally, add some keybindings to do the toggling, for example:</span>
<a name="line-60"></a><span class='hs-comment'>--</span>
<a name="line-61"></a><span class='hs-comment'>-- > , ((modm .|. controlMask, xK_x), sendMessage $ Toggle REFLECTX)</span>
<a name="line-62"></a><span class='hs-comment'>-- > , ((modm .|. controlMask, xK_y), sendMessage $ Toggle REFLECTY)</span>
<a name="line-63"></a><span class='hs-comment'>--</span>
<a name="line-64"></a>
<a name="line-65"></a><a name="reflectHoriz"></a><span class='hs-comment'>-- | Apply a horizontal reflection (left \<--\> right) to a</span>
<a name="line-66"></a><span class='hs-comment'>-- layout.</span>
<a name="line-67"></a><span class='hs-definition'>reflectHoriz</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'>Reflect</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-68"></a><span class='hs-definition'>reflectHoriz</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ModifiedLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>Reflect</span> <span class='hs-conid'>Horiz</span><span class='hs-layout'>)</span>
<a name="line-69"></a>
<a name="line-70"></a><a name="reflectVert"></a><span class='hs-comment'>-- | Apply a vertical reflection (top \<--\> bottom) to a</span>
<a name="line-71"></a><span class='hs-comment'>-- layout.</span>
<a name="line-72"></a><span class='hs-definition'>reflectVert</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'>Reflect</span> <span class='hs-varid'>l</span> <span class='hs-varid'>a</span>
<a name="line-73"></a><span class='hs-definition'>reflectVert</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ModifiedLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>Reflect</span> <span class='hs-conid'>Vert</span><span class='hs-layout'>)</span>
<a name="line-74"></a>
<a name="line-75"></a><a name="ReflectDir"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ReflectDir</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Horiz</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Vert</span>
<a name="line-76"></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>
<a name="line-77"></a>
<a name="line-78"></a><a name="reflectRect"></a><span class='hs-comment'>-- | Given an axis of reflection and the enclosing rectangle which</span>
<a name="line-79"></a><span class='hs-comment'>-- contains all the laid out windows, transform a rectangle</span>
<a name="line-80"></a><span class='hs-comment'>-- representing a window into its flipped counterpart.</span>
<a name="line-81"></a><span class='hs-definition'>reflectRect</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ReflectDir</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span>
<a name="line-82"></a><span class='hs-definition'>reflectRect</span> <span class='hs-conid'>Horiz</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-varid'>sx</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>sw</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-varid'>rx</span> <span class='hs-varid'>ry</span> <span class='hs-varid'>rw</span> <span class='hs-varid'>rh</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-83"></a> <span class='hs-conid'>Rectangle</span> <span class='hs-layout'>(</span><span class='hs-num'>2</span><span class='hs-varop'>*</span><span class='hs-varid'>sx</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>sw</span> <span class='hs-comment'>-</span> <span class='hs-varid'>rx</span> <span class='hs-comment'>-</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>rw</span><span class='hs-layout'>)</span> <span class='hs-varid'>ry</span> <span class='hs-varid'>rw</span> <span class='hs-varid'>rh</span>
<a name="line-84"></a><span class='hs-definition'>reflectRect</span> <span class='hs-conid'>Vert</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>sy</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>sh</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-varid'>rx</span> <span class='hs-varid'>ry</span> <span class='hs-varid'>rw</span> <span class='hs-varid'>rh</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-85"></a> <span class='hs-conid'>Rectangle</span> <span class='hs-varid'>rx</span> <span class='hs-layout'>(</span><span class='hs-num'>2</span><span class='hs-varop'>*</span><span class='hs-varid'>sy</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>sh</span> <span class='hs-comment'>-</span> <span class='hs-varid'>ry</span> <span class='hs-comment'>-</span> <span class='hs-varid'>fi</span> <span class='hs-varid'>rh</span><span class='hs-layout'>)</span> <span class='hs-varid'>rw</span> <span class='hs-varid'>rh</span>
<a name="line-86"></a>
<a name="line-87"></a><a name="fi"></a><span class='hs-definition'>fi</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Integral</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Num</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span>
<a name="line-88"></a><span class='hs-definition'>fi</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span>
<a name="line-89"></a>
<a name="line-90"></a>
<a name="line-91"></a><a name="Reflect"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Reflect</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Reflect</span> <span class='hs-conid'>ReflectDir</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span><span class='hs-layout'>)</span>
<a name="line-92"></a>
<a name="line-93"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>LayoutModifier</span> <span class='hs-conid'>Reflect</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>where</span>
<a name="line-94"></a>
<a name="line-95"></a> <span class='hs-comment'>-- reflect all the generated Rectangles.</span>
<a name="line-96"></a> <span class='hs-varid'>pureModifier</span> <span class='hs-layout'>(</span><span class='hs-conid'>Reflect</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>wrs</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>second</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reflectRect</span> <span class='hs-varid'>d</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-varid'>wrs</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Reflect</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-97"></a>
<a name="line-98"></a> <span class='hs-varid'>modifierDescription</span> <span class='hs-layout'>(</span><span class='hs-conid'>Reflect</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"Reflect"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>xy</span>
<a name="line-99"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>xy</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>d</span> <span class='hs-keyword'>of</span> <span class='hs-layout'>{</span> <span class='hs-conid'>Horiz</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"X"</span> <span class='hs-layout'>;</span> <span class='hs-conid'>Vert</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"Y"</span> <span class='hs-layout'>}</span>
<a name="line-100"></a>
<a name="line-101"></a>
<a name="line-102"></a><span class='hs-comment'>-------- instances for MultiToggle ------------------</span>
<a name="line-103"></a>
<a name="line-104"></a><a name="REFLECTX"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>REFLECTX</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>REFLECTX</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> <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-105"></a><a name="REFLECTY"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>REFLECTY</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>REFLECTY</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> <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-106"></a>
<a name="line-107"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Transformer</span> <span class='hs-conid'>REFLECTX</span> <span class='hs-conid'>Window</span> <span class='hs-keyword'>where</span>
<a name="line-108"></a> <span class='hs-varid'>transform</span> <span class='hs-conid'>REFLECTX</span> <span class='hs-varid'>x</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>reflectHoriz</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-109"></a>
<a name="line-110"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Transformer</span> <span class='hs-conid'>REFLECTY</span> <span class='hs-conid'>Window</span> <span class='hs-keyword'>where</span>
<a name="line-111"></a> <span class='hs-varid'>transform</span> <span class='hs-conid'>REFLECTY</span> <span class='hs-varid'>x</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>reflectVert</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
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