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ghc-gtk-devel-0.11.2-5.fc14.i686.rpm

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<a name="line-2"></a><span class='hs-comment'>{-# LINE 2 "./Graphics/UI/Gtk/Abstract/Object.chs" #-}</span>
<a name="line-3"></a><span class='hs-comment'>-- -*-haskell-*-</span>
<a name="line-4"></a><span class='hs-comment'>-- GIMP Toolkit (GTK) Object</span>
<a name="line-5"></a><span class='hs-comment'>--</span>
<a name="line-6"></a><span class='hs-comment'>-- Author : Axel Simon</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- Created: 9 April 2001</span>
<a name="line-9"></a><span class='hs-comment'>--</span>
<a name="line-10"></a><span class='hs-comment'>-- Copyright (C) 2001-2005 Axel Simon</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a><span class='hs-comment'>-- This library is free software; you can redistribute it and/or</span>
<a name="line-13"></a><span class='hs-comment'>-- modify it under the terms of the GNU Lesser General Public</span>
<a name="line-14"></a><span class='hs-comment'>-- License as published by the Free Software Foundation; either</span>
<a name="line-15"></a><span class='hs-comment'>-- version 2.1 of the License, or (at your option) any later version.</span>
<a name="line-16"></a><span class='hs-comment'>--</span>
<a name="line-17"></a><span class='hs-comment'>-- This library is distributed in the hope that it will be useful,</span>
<a name="line-18"></a><span class='hs-comment'>-- but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="line-19"></a><span class='hs-comment'>-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="line-20"></a><span class='hs-comment'>-- Lesser General Public License for more details.</span>
<a name="line-21"></a><span class='hs-comment'>--</span>
<a name="line-22"></a><span class='hs-comment'>-- |</span>
<a name="line-23"></a><span class='hs-comment'>-- Maintainer : gtk2hs-users@lists.sourceforge.net</span>
<a name="line-24"></a><span class='hs-comment'>-- Stability : provisional</span>
<a name="line-25"></a><span class='hs-comment'>-- Portability : portable (depends on GHC)</span>
<a name="line-26"></a><span class='hs-comment'>--</span>
<a name="line-27"></a><span class='hs-comment'>-- The base class of the Gtk+ type hierarchy.</span>
<a name="line-28"></a><span class='hs-comment'>--</span>
<a name="line-29"></a><span class='hs-comment'>-- * Each widget is a represented as a purely abstract data type. It can only</span>
<a name="line-30"></a><span class='hs-comment'>-- be accessed through and the special access functions that are defined</span>
<a name="line-31"></a><span class='hs-comment'>-- in each widget file.</span>
<a name="line-32"></a><span class='hs-comment'>--</span>
<a name="line-33"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>UI</span><span class='hs-varop'>.</span><span class='hs-conid'>Gtk</span><span class='hs-varop'>.</span><span class='hs-conid'>Abstract</span><span class='hs-varop'>.</span><span class='hs-conid'>Object</span> <span class='hs-layout'>(</span>
<a name="line-34"></a><span class='hs-comment'>-- * Detail</span>
<a name="line-35"></a><span class='hs-comment'>--</span>
<a name="line-36"></a><span class='hs-comment'>-- | 'Object' is the base class for all widgets, and for a few non-widget</span>
<a name="line-37"></a><span class='hs-comment'>-- objects such as 'Adjustment'. 'Object' predates 'GObject'; non-widgets that</span>
<a name="line-38"></a><span class='hs-comment'>-- derive from 'Object' rather than 'GObject' do so for backward compatibility</span>
<a name="line-39"></a><span class='hs-comment'>-- reasons.</span>
<a name="line-40"></a><span class='hs-comment'>--</span>
<a name="line-41"></a>
<a name="line-42"></a><span class='hs-comment'>-- * Class Hierarchy</span>
<a name="line-43"></a><span class='hs-comment'>-- |</span>
<a name="line-44"></a><span class='hs-comment'>-- @</span>
<a name="line-45"></a><span class='hs-comment'>-- | 'GObject'</span>
<a name="line-46"></a><span class='hs-comment'>-- | +----Object</span>
<a name="line-47"></a><span class='hs-comment'>-- | +----'Widget'</span>
<a name="line-48"></a><span class='hs-comment'>-- | +----'Adjustment'</span>
<a name="line-49"></a><span class='hs-comment'>-- | +----'CellRenderer'</span>
<a name="line-50"></a><span class='hs-comment'>-- | +----'FileFilter'</span>
<a name="line-51"></a><span class='hs-comment'>-- | +----'ItemFactory'</span>
<a name="line-52"></a><span class='hs-comment'>-- | +----'Tooltips'</span>
<a name="line-53"></a><span class='hs-comment'>-- | +----'TreeViewColumn'</span>
<a name="line-54"></a><span class='hs-comment'>-- @</span>
<a name="line-55"></a>
<a name="line-56"></a><span class='hs-comment'>-- * Types</span>
<a name="line-57"></a>  <span class='hs-conid'>Object</span><span class='hs-layout'>,</span>
<a name="line-58"></a>  <span class='hs-conid'>ObjectClass</span><span class='hs-layout'>,</span>
<a name="line-59"></a>  <span class='hs-varid'>castToObject</span><span class='hs-layout'>,</span> <span class='hs-varid'>gTypeObject</span><span class='hs-layout'>,</span>
<a name="line-60"></a>  <span class='hs-varid'>toObject</span><span class='hs-layout'>,</span>
<a name="line-61"></a>
<a name="line-62"></a><span class='hs-comment'>-- * Methods</span>
<a name="line-63"></a>  <span class='hs-varid'>makeNewObject</span><span class='hs-layout'>,</span>
<a name="line-64"></a>
<a name="line-65"></a><span class='hs-comment'>-- * Weak references</span>
<a name="line-66"></a>  <span class='hs-conid'>GWeakNotify</span><span class='hs-layout'>,</span>
<a name="line-67"></a>  <span class='hs-varid'>objectWeakref</span><span class='hs-layout'>,</span>
<a name="line-68"></a>  <span class='hs-varid'>objectWeakunref</span><span class='hs-layout'>,</span>
<a name="line-69"></a>
<a name="line-70"></a><span class='hs-comment'>-- * Signals</span>
<a name="line-71"></a>  <span class='hs-varid'>objectDestroy</span>
<a name="line-72"></a>  <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-73"></a>
<a name="line-74"></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-75"></a>
<a name="line-76"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Glib</span><span class='hs-varop'>.</span><span class='hs-conid'>FFI</span>
<a name="line-77"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Glib</span><span class='hs-varop'>.</span><span class='hs-conid'>GObject</span> <span class='hs-layout'>(</span><span class='hs-varid'>objectUnref</span><span class='hs-layout'>)</span>
<a name="line-78"></a>
<a name="line-79"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Glib</span><span class='hs-varop'>.</span><span class='hs-conid'>GObject</span> <span class='hs-layout'>(</span><span class='hs-varid'>objectRefSink</span><span class='hs-layout'>)</span>
<a name="line-80"></a>
<a name="line-81"></a>
<a name="line-82"></a>
<a name="line-83"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>UI</span><span class='hs-varop'>.</span><span class='hs-conid'>Gtk</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-84"></a><span class='hs-comment'>{-# LINE 83 "./Graphics/UI/Gtk/Abstract/Object.chs" #-}</span>
<a name="line-85"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>UI</span><span class='hs-varop'>.</span><span class='hs-conid'>Gtk</span><span class='hs-varop'>.</span><span class='hs-conid'>Signals</span>
<a name="line-86"></a><span class='hs-comment'>{-# LINE 84 "./Graphics/UI/Gtk/Abstract/Object.chs" #-}</span>
<a name="line-87"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IORef</span>
<a name="line-88"></a>
<a name="line-89"></a>
<a name="line-90"></a><span class='hs-comment'>{-# LINE 87 "./Graphics/UI/Gtk/Abstract/Object.chs" #-}</span>
<a name="line-91"></a>
<a name="line-92"></a><span class='hs-comment'>--------------------</span>
<a name="line-93"></a><span class='hs-comment'>-- Methods</span>
<a name="line-94"></a>
<a name="line-95"></a><span class='hs-comment'>-- turn the initial floating state to sunk</span>
<a name="line-96"></a><span class='hs-comment'>--</span>
<a name="line-97"></a><span class='hs-comment'>-- * The floating\/sunk concept of a GTK object is not very useful to us.</span>
<a name="line-98"></a><span class='hs-comment'>-- The following procedure circumvents the whole subject and ensures</span>
<a name="line-99"></a><span class='hs-comment'>-- proper cleanup:</span>
<a name="line-100"></a><span class='hs-comment'>-- on creation: objectRef, objectSink</span>
<a name="line-101"></a><span class='hs-comment'>-- on finalization: objectUnref</span>
<a name="line-102"></a><span class='hs-comment'>--</span>
<a name="line-103"></a><span class='hs-comment'>-- * This function cannot be bound by c2hs because it is not possible to</span>
<a name="line-104"></a><span class='hs-comment'>-- override the pointer hook.</span>
<a name="line-105"></a>
<a name="line-106"></a>
<a name="line-107"></a>
<a name="line-108"></a>
<a name="line-109"></a>
<a name="line-110"></a><a name="makeNewObject"></a><span class='hs-comment'>-- This is a convenience function to generate a new widget. It adds the</span>
<a name="line-111"></a><span class='hs-comment'>-- finalizer with the method described under objectSink.</span>
<a name="line-112"></a><span class='hs-comment'>--</span>
<a name="line-113"></a><span class='hs-comment'>-- * The constr argument is the contructor of the specific object.</span>
<a name="line-114"></a><span class='hs-comment'>--</span>
<a name="line-115"></a><span class='hs-definition'>makeNewObject</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ObjectClass</span> <span class='hs-varid'>obj</span> <span class='hs-keyglyph'>=&gt;</span>
<a name="line-116"></a>  <span class='hs-layout'>(</span><span class='hs-conid'>ForeignPtr</span> <span class='hs-varid'>obj</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>obj</span><span class='hs-layout'>,</span> <span class='hs-conid'>FinalizerPtr</span> <span class='hs-varid'>obj</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>obj</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>obj</span>
<a name="line-117"></a><span class='hs-definition'>makeNewObject</span> <span class='hs-layout'>(</span><span class='hs-varid'>constr</span><span class='hs-layout'>,</span> <span class='hs-varid'>objectUnref</span><span class='hs-layout'>)</span> <span class='hs-varid'>generator</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-118"></a>  <span class='hs-varid'>objPtr</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>generator</span>
<a name="line-119"></a>  <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>objPtr</span> <span class='hs-varop'>==</span> <span class='hs-varid'>nullPtr</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fail</span> <span class='hs-str'>"makeNewObject: object is NULL"</span><span class='hs-layout'>)</span>
<a name="line-120"></a>
<a name="line-121"></a>  <span class='hs-varid'>objectRefSink</span> <span class='hs-varid'>objPtr</span>
<a name="line-122"></a>
<a name="line-123"></a>
<a name="line-124"></a>
<a name="line-125"></a>
<a name="line-126"></a>  <span class='hs-varid'>obj</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>newForeignPtr</span> <span class='hs-varid'>objPtr</span> <span class='hs-varid'>objectUnref</span>
<a name="line-127"></a>  <span class='hs-varid'>return</span> <span class='hs-varop'>$!</span> <span class='hs-varid'>constr</span> <span class='hs-varid'>obj</span>
<a name="line-128"></a>
<a name="line-129"></a><a name="GWeakNotify"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>GWeakNotify</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GObject</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-130"></a><span class='hs-comment'>{-# LINE 126 "./Graphics/UI/Gtk/Abstract/Object.chs" #-}</span>
<a name="line-131"></a>
<a name="line-132"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"wrapper"</span> <span class='hs-varid'>mkDestructor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>GWeakNotify</span>
<a name="line-133"></a>
<a name="line-134"></a><a name="objectWeakref"></a><span class='hs-comment'>-- | Attach a callback that will be called after the</span>
<a name="line-135"></a><span class='hs-comment'>-- destroy hooks have been called</span>
<a name="line-136"></a><span class='hs-comment'>--</span>
<a name="line-137"></a><span class='hs-definition'>objectWeakref</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ObjectClass</span> <span class='hs-varid'>o</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-varid'>o</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>GWeakNotify</span>
<a name="line-138"></a><span class='hs-definition'>objectWeakref</span> <span class='hs-varid'>obj</span> <span class='hs-varid'>uFun</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-139"></a>  <span class='hs-varid'>funPtrContainer</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>newIORef</span> <span class='hs-varid'>nullFunPtr</span>
<a name="line-140"></a>  <span class='hs-varid'>uFunPtr</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>mkDestructor</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-141"></a>    <span class='hs-varid'>uFun</span>
<a name="line-142"></a>    <span class='hs-varid'>funPtr</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>funPtrContainer</span>
<a name="line-143"></a>    <span class='hs-varid'>freeHaskellFunPtr</span> <span class='hs-varid'>funPtr</span>
<a name="line-144"></a>  <span class='hs-varid'>writeIORef</span> <span class='hs-varid'>funPtrContainer</span> <span class='hs-varid'>uFunPtr</span>
<a name="line-145"></a>  <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>GObject</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-varid'>arg2</span> <span class='hs-varid'>arg3</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-&gt;</span><span class='hs-varid'>g_object_weak_ref</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>arg2</span> <span class='hs-varid'>arg3</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>toGObject</span> <span class='hs-varid'>obj</span><span class='hs-layout'>)</span> <span class='hs-varid'>uFunPtr</span> <span class='hs-varid'>nullPtr</span>
<a name="line-146"></a>  <span class='hs-varid'>return</span> <span class='hs-varid'>uFunPtr</span>
<a name="line-147"></a>
<a name="line-148"></a><a name="objectWeakunref"></a><span class='hs-comment'>-- | Detach a weak destroy callback function</span>
<a name="line-149"></a><span class='hs-comment'>--</span>
<a name="line-150"></a><span class='hs-definition'>objectWeakunref</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ObjectClass</span> <span class='hs-varid'>o</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-varid'>o</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>GWeakNotify</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-151"></a><span class='hs-definition'>objectWeakunref</span> <span class='hs-varid'>obj</span> <span class='hs-varid'>fun</span> <span class='hs-keyglyph'>=</span>
<a name="line-152"></a>  <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>GObject</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-varid'>arg2</span> <span class='hs-varid'>arg3</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-&gt;</span><span class='hs-varid'>g_object_weak_unref</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>arg2</span> <span class='hs-varid'>arg3</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>toGObject</span> <span class='hs-varid'>obj</span><span class='hs-layout'>)</span> <span class='hs-varid'>fun</span> <span class='hs-varid'>nullPtr</span>
<a name="line-153"></a>
<a name="line-154"></a>
<a name="line-155"></a><span class='hs-comment'>--------------------</span>
<a name="line-156"></a><span class='hs-comment'>-- Signals</span>
<a name="line-157"></a>
<a name="line-158"></a><a name="objectDestroy"></a><span class='hs-comment'>-- | Signals that all holders of a reference to the 'Object' should release</span>
<a name="line-159"></a><span class='hs-comment'>-- the reference that they hold. May result in finalization of the object if</span>
<a name="line-160"></a><span class='hs-comment'>-- all references are released.</span>
<a name="line-161"></a><span class='hs-comment'>--</span>
<a name="line-162"></a><span class='hs-definition'>objectDestroy</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ObjectClass</span> <span class='hs-varid'>self</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>Signal</span> <span class='hs-varid'>self</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-163"></a><span class='hs-definition'>objectDestroy</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Signal</span> <span class='hs-layout'>(</span><span class='hs-varid'>connect_NONE__NONE</span> <span class='hs-str'>"destroy"</span><span class='hs-layout'>)</span>
<a name="line-164"></a>
<a name="line-165"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"g_object_weak_ref"</span>
<a name="line-166"></a>  <span class='hs-varid'>g_object_weak_ref</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GObject</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GObject</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-167"></a>
<a name="line-168"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"g_object_weak_unref"</span>
<a name="line-169"></a>  <span class='hs-varid'>g_object_weak_unref</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GObject</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GObject</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
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