<?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://www.cs.york.ac.uk/fp/darcs/hscolour/ --> <title>XMonad/Layout/DragPane.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE DeriveDataTypeable, FlexibleInstances, 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.Layout.DragPane</span> <a name="line-6"></a><span class='hs-comment'>-- Copyright : (c) Spencer Janssen <spencerjanssen@gmail.com></span> <a name="line-7"></a><span class='hs-comment'>-- David Roundy <droundy@darcs.net>,</span> <a name="line-8"></a><span class='hs-comment'>-- Andrea Rossato <andrea.rossato@unibz.it></span> <a name="line-9"></a><span class='hs-comment'>-- License : BSD3-style (see LICENSE)</span> <a name="line-10"></a><span class='hs-comment'>--</span> <a name="line-11"></a><span class='hs-comment'>-- Maintainer : Andrea Rossato <andrea.rossato@unibz.it></span> <a name="line-12"></a><span class='hs-comment'>-- Stability : unstable</span> <a name="line-13"></a><span class='hs-comment'>-- Portability : unportable</span> <a name="line-14"></a><span class='hs-comment'>--</span> <a name="line-15"></a><span class='hs-comment'>-- Layouts that splits the screen either horizontally or vertically and</span> <a name="line-16"></a><span class='hs-comment'>-- shows two windows. The first window is always the master window, and</span> <a name="line-17"></a><span class='hs-comment'>-- the other is either the currently focused window or the second window in</span> <a name="line-18"></a><span class='hs-comment'>-- layout order.</span> <a name="line-19"></a> <a name="line-20"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span> <a name="line-21"></a> <a name="line-22"></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'>DragPane</span> <span class='hs-layout'>(</span> <a name="line-23"></a> <span class='hs-comment'>-- * Usage</span> <a name="line-24"></a> <span class='hs-comment'>-- $usage</span> <a name="line-25"></a> <span class='hs-varid'>dragPane</span> <a name="line-26"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>DragPane</span><span class='hs-layout'>,</span> <span class='hs-conid'>DragType</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <a name="line-27"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</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'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Unique</span> <a name="line-31"></a> <a name="line-32"></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-33"></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'>Invisible</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'>-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:</span> <a name="line-38"></a><span class='hs-comment'>--</span> <a name="line-39"></a><span class='hs-comment'>-- > import XMonad.Layout.DragPane</span> <a name="line-40"></a><span class='hs-comment'>--</span> <a name="line-41"></a><span class='hs-comment'>-- Then edit your @layoutHook@ by adding the DragPane layout:</span> <a name="line-42"></a><span class='hs-comment'>--</span> <a name="line-43"></a><span class='hs-comment'>-- > myLayout = dragPane Horizontal 0.1 0.5 ||| Full ||| etc..</span> <a name="line-44"></a><span class='hs-comment'>-- > main = xmonad defaultConfig { layoutHook = myLayout }</span> <a name="line-45"></a><span class='hs-comment'>--</span> <a name="line-46"></a><span class='hs-comment'>-- For more detailed instructions on editing the layoutHook see:</span> <a name="line-47"></a><span class='hs-comment'>--</span> <a name="line-48"></a><span class='hs-comment'>-- "XMonad.Doc.Extending#Editing_the_layout_hook"</span> <a name="line-49"></a> <a name="line-50"></a><a name="halfHandleWidth"></a><span class='hs-definition'>halfHandleWidth</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Integral</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <a name="line-51"></a><span class='hs-definition'>halfHandleWidth</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>1</span> <a name="line-52"></a> <a name="line-53"></a><a name="handleColor"></a><span class='hs-definition'>handleColor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <a name="line-54"></a><span class='hs-definition'>handleColor</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"#000000"</span> <a name="line-55"></a> <a name="line-56"></a><a name="dragPane"></a><span class='hs-definition'>dragPane</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DragType</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DragPane</span> <span class='hs-varid'>a</span> <a name="line-57"></a><span class='hs-definition'>dragPane</span> <span class='hs-varid'>t</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>DragPane</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <a name="line-58"></a> <a name="line-59"></a><a name="DragPane"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>DragPane</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <a name="line-60"></a> <span class='hs-conid'>DragPane</span> <span class='hs-layout'>(</span><span class='hs-conid'>Invisible</span> <span class='hs-conid'>Maybe</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-conid'>Int</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-conid'>DragType</span> <span class='hs-conid'>Double</span> <span class='hs-conid'>Double</span> <a name="line-61"></a> <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-62"></a> <a name="line-63"></a><a name="DragType"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>DragType</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Horizontal</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Vertical</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-64"></a> <a name="line-65"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>LayoutClass</span> <span class='hs-conid'>DragPane</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>where</span> <a name="line-66"></a> <span class='hs-varid'>doLayout</span> <span class='hs-varid'>d</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>DragPane</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Vertical</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'>doLay</span> <span class='hs-varid'>id</span> <span class='hs-varid'>d</span> <a name="line-67"></a> <span class='hs-varid'>doLayout</span> <span class='hs-varid'>d</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>DragPane</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Horizontal</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'>doLay</span> <span class='hs-varid'>mirrorRect</span> <span class='hs-varid'>d</span> <a name="line-68"></a> <span class='hs-varid'>handleMessage</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>handleMess</span> <a name="line-69"></a> <a name="line-70"></a><a name="SetFrac"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>SetFrac</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>SetFrac</span> <span class='hs-conid'>Int</span> <span class='hs-conid'>Double</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> <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-71"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Message</span> <span class='hs-conid'>SetFrac</span> <a name="line-72"></a> <a name="line-73"></a><a name="handleMess"></a><span class='hs-definition'>handleMess</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DragPane</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SomeMessage</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>DragPane</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-74"></a><span class='hs-definition'>handleMess</span> <span class='hs-varid'>d</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>DragPane</span> <span class='hs-varid'>mb</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>I</span> <span class='hs-layout'>(</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-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>ident</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>ty</span> <span class='hs-varid'>delta</span> <span class='hs-varid'>split</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span> <a name="line-75"></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'>x</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-keyword'>do</span> <span class='hs-varid'>handleEvent</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <a name="line-76"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span> <a name="line-77"></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'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>hideWindow</span> <span class='hs-varid'>win</span> <a name="line-78"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>DragPane</span> <span class='hs-varid'>mb</span> <span class='hs-varid'>ty</span> <span class='hs-varid'>delta</span> <span class='hs-varid'>split</span><span class='hs-layout'>)</span> <a name="line-79"></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'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>deleteWindow</span> <span class='hs-varid'>win</span> <a name="line-80"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>DragPane</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-varid'>ty</span> <span class='hs-varid'>delta</span> <span class='hs-varid'>split</span><span class='hs-layout'>)</span> <a name="line-81"></a> <span class='hs-comment'>-- layout specific messages</span> <a name="line-82"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>Shrink</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>DragPane</span> <span class='hs-varid'>mb</span> <span class='hs-varid'>ty</span> <span class='hs-varid'>delta</span> <span class='hs-layout'>(</span><span class='hs-varid'>split</span> <span class='hs-comment'>-</span> <span class='hs-varid'>delta</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-83"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>Expand</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>DragPane</span> <span class='hs-varid'>mb</span> <span class='hs-varid'>ty</span> <span class='hs-varid'>delta</span> <span class='hs-layout'>(</span><span class='hs-varid'>split</span> <span class='hs-varop'>+</span> <span class='hs-varid'>delta</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-84"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>SetFrac</span> <span class='hs-varid'>ident'</span> <span class='hs-varid'>frac</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fromMessage</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>ident'</span> <span class='hs-varop'>==</span> <span class='hs-varid'>ident</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-85"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>DragPane</span> <span class='hs-varid'>mb</span> <span class='hs-varid'>ty</span> <span class='hs-varid'>delta</span> <span class='hs-varid'>frac</span><span class='hs-layout'>)</span> <a name="line-86"></a><span class='hs-definition'>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-87"></a> <a name="line-88"></a><a name="handleEvent"></a><span class='hs-definition'>handleEvent</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DragPane</span> <span class='hs-varid'>a</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-89"></a><span class='hs-definition'>handleEvent</span> <span class='hs-layout'>(</span><span class='hs-conid'>DragPane</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span> <span class='hs-layout'>(</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><span class='hs-varid'>ident</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>ty</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <a name="line-90"></a> <span class='hs-layout'>(</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'>thisw</span><span class='hs-layout'>,</span> <span class='hs-varid'>ev_subwindow</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>thisbw</span><span class='hs-layout'>,</span> <span class='hs-varid'>ev_event_type</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span> <a name="line-91"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>t</span> <span class='hs-varop'>==</span> <span class='hs-varid'>buttonPress</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>thisw</span> <span class='hs-varop'>==</span> <span class='hs-varid'>win</span> <span class='hs-varop'>||</span> <span class='hs-varid'>thisbw</span> <span class='hs-varop'>==</span> <span class='hs-varid'>win</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-92"></a> <span class='hs-varid'>mouseDrag</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>ex</span> <span class='hs-varid'>ey</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-93"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>frac</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>ty</span> <span class='hs-keyword'>of</span> <a name="line-94"></a> <span class='hs-conid'>Vertical</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>ex</span> <span class='hs-comment'>-</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rect_x</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-varop'>/</span><span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rect_width</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <a name="line-95"></a> <span class='hs-conid'>Horizontal</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>ey</span> <span class='hs-comment'>-</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rect_x</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-varop'>/</span><span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rect_width</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <a name="line-96"></a> <span class='hs-varid'>sendMessage</span> <span class='hs-layout'>(</span><span class='hs-conid'>SetFrac</span> <span class='hs-varid'>ident</span> <span class='hs-varid'>frac</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-97"></a> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <a name="line-98"></a><span class='hs-definition'>handleEvent</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-99"></a> <a name="line-100"></a><a name="doLay"></a><span class='hs-definition'>doLay</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DragPane</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-conid'>Stack</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>X</span> <span class='hs-layout'>(</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><span class='hs-layout'>,</span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>DragPane</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-101"></a><span class='hs-definition'>doLay</span> <span class='hs-varid'>mirror</span> <span class='hs-layout'>(</span><span class='hs-conid'>DragPane</span> <span class='hs-varid'>mw</span> <span class='hs-varid'>ty</span> <span class='hs-varid'>delta</span> <span class='hs-varid'>split</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-102"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>r'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mirror</span> <span class='hs-varid'>r</span> <a name="line-103"></a> <span class='hs-layout'>(</span><span class='hs-varid'>left'</span><span class='hs-layout'>,</span> <span class='hs-varid'>right'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitHorizontallyBy</span> <span class='hs-varid'>split</span> <span class='hs-varid'>r'</span> <a name="line-104"></a> <span class='hs-varid'>left</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>left'</span> <span class='hs-keyword'>of</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-keyglyph'>-></span> <a name="line-105"></a> <span class='hs-varid'>mirror</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Rectangle</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-comment'>-</span><span class='hs-varid'>halfHandleWidth</span><span class='hs-layout'>)</span> <span class='hs-varid'>h</span> <a name="line-106"></a> <span class='hs-varid'>right</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>right'</span> <span class='hs-keyword'>of</span> <a name="line-107"></a> <span class='hs-conid'>Rectangle</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>-></span> <a name="line-108"></a> <span class='hs-varid'>mirror</span> <span class='hs-varop'>$</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'>halfHandleWidth</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-comment'>-</span><span class='hs-varid'>halfHandleWidth</span><span class='hs-layout'>)</span> <span class='hs-varid'>h</span> <a name="line-109"></a> <span class='hs-varid'>handr</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>left'</span> <span class='hs-keyword'>of</span> <a name="line-110"></a> <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-keyglyph'>-></span> <a name="line-111"></a> <span class='hs-varid'>mirror</span> <span class='hs-varop'>$</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'>fromIntegral</span> <span class='hs-varid'>w</span> <span class='hs-comment'>-</span> <span class='hs-varid'>halfHandleWidth</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span> <span class='hs-layout'>(</span><span class='hs-num'>2</span><span class='hs-varop'>*</span><span class='hs-varid'>halfHandleWidth</span><span class='hs-layout'>)</span> <span class='hs-varid'>h</span> <a name="line-112"></a> <span class='hs-varid'>wrs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>reverse</span> <span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>up</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span> <a name="line-113"></a> <span class='hs-layout'>(</span><span class='hs-varid'>master</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>master</span><span class='hs-layout'>,</span><span class='hs-varid'>left</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span><span class='hs-varid'>right</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <a name="line-114"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>down</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span> <a name="line-115"></a> <span class='hs-layout'>(</span><span class='hs-varid'>next</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span><span class='hs-varid'>left</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-varid'>next</span><span class='hs-layout'>,</span><span class='hs-varid'>right</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <a name="line-116"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>W</span><span class='hs-varop'>.</span><span class='hs-varid'>focus</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <a name="line-117"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>length</span> <span class='hs-varid'>wrs</span> <span class='hs-varop'>></span> <span class='hs-num'>1</span> <a name="line-118"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>mw</span> <span class='hs-keyword'>of</span> <a name="line-119"></a> <span class='hs-conid'>I</span> <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-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>ident</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-120"></a> <span class='hs-varid'>w'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>deleteWindow</span> <span class='hs-varid'>w</span> <span class='hs-varop'>>></span> <span class='hs-varid'>newDragWin</span> <span class='hs-varid'>handr</span> <a name="line-121"></a> <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'>DragPane</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>w'</span><span class='hs-layout'>,</span><span class='hs-varid'>r'</span><span class='hs-layout'>,</span><span class='hs-varid'>ident</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>ty</span> <span class='hs-varid'>delta</span> <span class='hs-varid'>split</span><span class='hs-layout'>)</span> <a name="line-122"></a> <span class='hs-conid'>I</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-123"></a> <span class='hs-varid'>w</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newDragWin</span> <span class='hs-varid'>handr</span> <a name="line-124"></a> <span class='hs-varid'>i</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>io</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newUnique</span> <a name="line-125"></a> <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'>$</span> <span class='hs-conid'>DragPane</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span> <span class='hs-varop'>$</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-varid'>r'</span><span class='hs-layout'>,</span><span class='hs-varid'>hashUnique</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>ty</span> <span class='hs-varid'>delta</span> <span class='hs-varid'>split</span><span class='hs-layout'>)</span> <a name="line-126"></a> <span class='hs-keyword'>else</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-127"></a> <a name="line-128"></a> <a name="line-129"></a><a name="newDragWin"></a><span class='hs-definition'>newDragWin</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-130"></a><span class='hs-definition'>newDragWin</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-131"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>mask</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>exposureMask</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>buttonPressMask</span> <a name="line-132"></a> <span class='hs-varid'>w</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>createNewWindow</span> <span class='hs-varid'>r</span> <span class='hs-varid'>mask</span> <span class='hs-varid'>handleColor</span> <span class='hs-conid'>False</span> <a name="line-133"></a> <span class='hs-varid'>showWindow</span> <span class='hs-varid'>w</span> <a name="line-134"></a> <span class='hs-varid'>d</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asks</span> <span class='hs-varid'>display</span> <a name="line-135"></a> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>lowerWindow</span> <span class='hs-varid'>d</span> <span class='hs-varid'>w</span> <a name="line-136"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>w</span> </pre></body> </html>