<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<!-- Generated by HsColour, http://code.haskell.org/~malcolm/hscolour/ -->
<title>XMonad/Layout/Grid.hs</title>
<link type='text/css' rel='stylesheet' href='hscolour.css' />
</head>
<body>
<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses #-}</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.Grid</span>
<a name="line-6"></a><span class='hs-comment'>-- Copyright : (c) Lukas Mai</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 : <l.mai@web.de></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 simple layout that attempts to put all windows in a square grid.</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>
<a name="line-17"></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'>Grid</span> <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> <span class='hs-conid'>Grid</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>arrange</span><span class='hs-layout'>,</span> <span class='hs-varid'>defaultRatio</span>
<a name="line-21"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-22"></a>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>XMonad</span><span class='hs-varop'>.</span><span class='hs-conid'>StackSet</span>
<a name="line-25"></a>
<a name="line-26"></a><span class='hs-comment'>-- $usage</span>
<a name="line-27"></a><span class='hs-comment'>-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:</span>
<a name="line-28"></a><span class='hs-comment'>--</span>
<a name="line-29"></a><span class='hs-comment'>-- > import XMonad.Layout.Grid</span>
<a name="line-30"></a><span class='hs-comment'>--</span>
<a name="line-31"></a><span class='hs-comment'>-- Then edit your @layoutHook@ by adding the Grid layout:</span>
<a name="line-32"></a><span class='hs-comment'>--</span>
<a name="line-33"></a><span class='hs-comment'>-- > myLayout = Grid ||| Full ||| etc..</span>
<a name="line-34"></a><span class='hs-comment'>-- > main = xmonad defaultConfig { layoutHook = myLayout }</span>
<a name="line-35"></a><span class='hs-comment'>--</span>
<a name="line-36"></a><span class='hs-comment'>-- You can also specify an aspect ratio for Grid to strive for with the</span>
<a name="line-37"></a><span class='hs-comment'>-- GridRatio constructor. For example, if you want Grid to try to make a grid</span>
<a name="line-38"></a><span class='hs-comment'>-- four windows wide and three windows tall, you could use</span>
<a name="line-39"></a><span class='hs-comment'>--</span>
<a name="line-40"></a><span class='hs-comment'>-- > myLayout = GridRatio (4/3) ||| etc.</span>
<a name="line-41"></a><span class='hs-comment'>--</span>
<a name="line-42"></a><span class='hs-comment'>-- For more detailed instructions on editing the layoutHook see:</span>
<a name="line-43"></a><span class='hs-comment'>--</span>
<a name="line-44"></a><span class='hs-comment'>-- "XMonad.Doc.Extending#Editing_the_layout_hook"</span>
<a name="line-45"></a>
<a name="line-46"></a><a name="Grid"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Grid</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Grid</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>GridRatio</span> <span class='hs-conid'>Double</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-47"></a>
<a name="line-48"></a><a name="defaultRatio"></a><span class='hs-definition'>defaultRatio</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Double</span>
<a name="line-49"></a><span class='hs-definition'>defaultRatio</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>16</span><span class='hs-varop'>/</span><span class='hs-num'>9</span>
<a name="line-50"></a>
<a name="line-51"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-conid'>Grid</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>where</span>
<a name="line-52"></a> <span class='hs-varid'>pureLayout</span> <span class='hs-conid'>Grid</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pureLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>GridRatio</span> <span class='hs-varid'>defaultRatio</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span>
<a name="line-53"></a> <span class='hs-varid'>pureLayout</span> <span class='hs-layout'>(</span><span class='hs-conid'>GridRatio</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>arrange</span> <span class='hs-varid'>d</span> <span class='hs-varid'>r</span> <span class='hs-varop'>.</span> <span class='hs-varid'>integrate</span>
<a name="line-54"></a>
<a name="line-55"></a><a name="arrange"></a><span class='hs-definition'>arrange</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</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-keyglyph'>]</span>
<a name="line-56"></a><span class='hs-definition'>arrange</span> <span class='hs-varid'>aspectRatio</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-varid'>st</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>zip</span> <span class='hs-varid'>st</span> <span class='hs-varid'>rectangles</span>
<a name="line-57"></a> <span class='hs-keyword'>where</span>
<a name="line-58"></a> <span class='hs-varid'>nwins</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>st</span>
<a name="line-59"></a> <span class='hs-varid'>ncols</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>max</span> <span class='hs-num'>1</span> <span class='hs-varop'>.</span> <span class='hs-varid'>round</span> <span class='hs-varop'>.</span> <span class='hs-varid'>sqrt</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>nwins</span> <span class='hs-varop'>*</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>rw</span> <span class='hs-varop'>/</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>rh</span> <span class='hs-varop'>*</span> <span class='hs-varid'>aspectRatio</span><span class='hs-layout'>)</span>
<a name="line-60"></a> <span class='hs-varid'>mincs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>max</span> <span class='hs-num'>1</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nwins</span> <span class='hs-varop'>`div`</span> <span class='hs-varid'>ncols</span>
<a name="line-61"></a> <span class='hs-varid'>extrs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nwins</span> <span class='hs-comment'>-</span> <span class='hs-varid'>ncols</span> <span class='hs-varop'>*</span> <span class='hs-varid'>mincs</span>
<a name="line-62"></a> <span class='hs-varid'>chop</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Dimension</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Position</span><span class='hs-layout'>,</span> <span class='hs-conid'>Dimension</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-63"></a> <span class='hs-varid'>chop</span> <span class='hs-varid'>n</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-num'>0</span><span class='hs-layout'>,</span> <span class='hs-varid'>m</span> <span class='hs-comment'>-</span> <span class='hs-varid'>k</span> <span class='hs-varop'>*</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>pred</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-conid'>(,)</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>tail</span> <span class='hs-varop'>.</span> <span class='hs-varid'>reverse</span> <span class='hs-varop'>.</span> <span class='hs-varid'>take</span> <span class='hs-varid'>n</span> <span class='hs-varop'>.</span> <span class='hs-varid'>tail</span> <span class='hs-varop'>.</span> <span class='hs-varid'>iterate</span> <span class='hs-layout'>(</span><span class='hs-varid'>subtract</span> <span class='hs-varid'>k'</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>m'</span>
<a name="line-64"></a> <span class='hs-keyword'>where</span>
<a name="line-65"></a> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Dimension</span>
<a name="line-66"></a> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span> <span class='hs-varop'>`div`</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>n</span>
<a name="line-67"></a> <span class='hs-varid'>m'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>m</span>
<a name="line-68"></a> <span class='hs-varid'>k'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Position</span>
<a name="line-69"></a> <span class='hs-varid'>k'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>k</span>
<a name="line-70"></a> <span class='hs-varid'>xcoords</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>chop</span> <span class='hs-varid'>ncols</span> <span class='hs-varid'>rw</span>
<a name="line-71"></a> <span class='hs-varid'>ycoords</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>chop</span> <span class='hs-varid'>mincs</span> <span class='hs-varid'>rh</span>
<a name="line-72"></a> <span class='hs-varid'>ycoords'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>chop</span> <span class='hs-layout'>(</span><span class='hs-varid'>succ</span> <span class='hs-varid'>mincs</span><span class='hs-layout'>)</span> <span class='hs-varid'>rh</span>
<a name="line-73"></a> <span class='hs-layout'>(</span><span class='hs-varid'>xbase</span><span class='hs-layout'>,</span> <span class='hs-varid'>xext</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitAt</span> <span class='hs-layout'>(</span><span class='hs-varid'>ncols</span> <span class='hs-comment'>-</span> <span class='hs-varid'>extrs</span><span class='hs-layout'>)</span> <span class='hs-varid'>xcoords</span>
<a name="line-74"></a> <span class='hs-varid'>rectangles</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>combine</span> <span class='hs-varid'>ycoords</span> <span class='hs-varid'>xbase</span> <span class='hs-varop'>++</span> <span class='hs-varid'>combine</span> <span class='hs-varid'>ycoords'</span> <span class='hs-varid'>xext</span>
<a name="line-75"></a> <span class='hs-keyword'>where</span>
<a name="line-76"></a> <span class='hs-varid'>combine</span> <span class='hs-varid'>ys</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Rectangle</span> <span class='hs-layout'>(</span><span class='hs-varid'>rx</span> <span class='hs-varop'>+</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>ry</span> <span class='hs-varop'>+</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</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'>xs</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ys</span><span class='hs-keyglyph'>]</span>
</pre></body>
</html>
