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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 : Graphics.UI.GLUT.Window</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) Sven Panne 2002-2005</span>
<a name="line-5"></a><span class='hs-comment'>-- License : BSD-style (see the file libraries/GLUT/LICENSE)</span>
<a name="line-6"></a><span class='hs-comment'>--</span>
<a name="line-7"></a><span class='hs-comment'>-- Maintainer : sven.panne@aedion.de</span>
<a name="line-8"></a><span class='hs-comment'>-- Stability : stable</span>
<a name="line-9"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-10"></a><span class='hs-comment'>--</span>
<a name="line-11"></a><span class='hs-comment'>-- GLUT supports two types of windows: top-level windows and subwindows. Both</span>
<a name="line-12"></a><span class='hs-comment'>-- types support OpenGL rendering and GLUT callbacks. There is a single</span>
<a name="line-13"></a><span class='hs-comment'>-- identifier space for both types of windows.</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'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>UI</span><span class='hs-varop'>.</span><span class='hs-conid'>GLUT</span><span class='hs-varop'>.</span><span class='hs-conid'>Window</span> <span class='hs-layout'>(</span>
<a name="line-18"></a> <span class='hs-comment'>-- * Window identifiers</span>
<a name="line-19"></a> <span class='hs-conid'>Window</span><span class='hs-layout'>,</span>
<a name="line-20"></a>
<a name="line-21"></a> <span class='hs-comment'>-- * Creating and destroying (sub-)windows</span>
<a name="line-22"></a>
<a name="line-23"></a> <span class='hs-comment'>-- $CreatingAndDestroyingSubWindows</span>
<a name="line-24"></a> <span class='hs-varid'>createWindow</span><span class='hs-layout'>,</span> <span class='hs-varid'>createSubWindow</span><span class='hs-layout'>,</span> <span class='hs-varid'>destroyWindow</span><span class='hs-layout'>,</span>
<a name="line-25"></a> <span class='hs-varid'>parentWindow</span><span class='hs-layout'>,</span> <span class='hs-varid'>numSubWindows</span><span class='hs-layout'>,</span>
<a name="line-26"></a>
<a name="line-27"></a> <span class='hs-comment'>-- * Manipulating the /current window/</span>
<a name="line-28"></a> <span class='hs-varid'>currentWindow</span><span class='hs-layout'>,</span>
<a name="line-29"></a>
<a name="line-30"></a> <span class='hs-comment'>-- * Re-displaying and double buffer management</span>
<a name="line-31"></a> <span class='hs-varid'>postRedisplay</span><span class='hs-layout'>,</span> <span class='hs-varid'>swapBuffers</span><span class='hs-layout'>,</span>
<a name="line-32"></a>
<a name="line-33"></a> <span class='hs-comment'>-- * Changing the window geometry</span>
<a name="line-34"></a>
<a name="line-35"></a> <span class='hs-comment'>-- $ChangingTheWindowGeometry</span>
<a name="line-36"></a> <span class='hs-varid'>windowPosition</span><span class='hs-layout'>,</span> <span class='hs-varid'>windowSize</span><span class='hs-layout'>,</span> <span class='hs-varid'>fullScreen</span><span class='hs-layout'>,</span> <span class='hs-varid'>fullScreenToggle</span><span class='hs-layout'>,</span>
<a name="line-37"></a>
<a name="line-38"></a> <span class='hs-comment'>-- * Manipulating the stacking order</span>
<a name="line-39"></a>
<a name="line-40"></a> <span class='hs-comment'>-- $ManipulatingTheStackingOrder</span>
<a name="line-41"></a> <span class='hs-varid'>pushWindow</span><span class='hs-layout'>,</span> <span class='hs-varid'>popWindow</span><span class='hs-layout'>,</span>
<a name="line-42"></a>
<a name="line-43"></a> <span class='hs-comment'>-- * Managing a window\'s display status</span>
<a name="line-44"></a> <span class='hs-conid'>WindowStatus</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'>windowStatus</span><span class='hs-layout'>,</span>
<a name="line-45"></a>
<a name="line-46"></a> <span class='hs-comment'>-- * Changing the window\/icon title</span>
<a name="line-47"></a>
<a name="line-48"></a> <span class='hs-comment'>-- $ChangingTheWindowIconTitle</span>
<a name="line-49"></a> <span class='hs-varid'>windowTitle</span><span class='hs-layout'>,</span> <span class='hs-varid'>iconTitle</span><span class='hs-layout'>,</span>
<a name="line-50"></a>
<a name="line-51"></a> <span class='hs-comment'>-- * Cursor management</span>
<a name="line-52"></a> <span class='hs-conid'>Cursor</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'>cursor</span><span class='hs-layout'>,</span> <span class='hs-varid'>pointerPosition</span>
<a name="line-53"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-54"></a>
<a name="line-55"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>String</span> <span class='hs-layout'>(</span> <span class='hs-conid'>CString</span><span class='hs-layout'>,</span> <span class='hs-varid'>withCString</span> <span class='hs-layout'>)</span>
<a name="line-56"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <span class='hs-layout'>(</span> <span class='hs-conid'>CInt</span> <span class='hs-layout'>)</span>
<a name="line-57"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>OpenGL</span><span class='hs-varop'>.</span><span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>CoordTrans</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Position</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'>Size</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-58"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>OpenGL</span><span class='hs-varop'>.</span><span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>StateVar</span> <span class='hs-layout'>(</span>
<a name="line-59"></a> <span class='hs-conid'>GettableStateVar</span><span class='hs-layout'>,</span> <span class='hs-varid'>makeGettableStateVar</span><span class='hs-layout'>,</span>
<a name="line-60"></a> <span class='hs-conid'>SettableStateVar</span><span class='hs-layout'>,</span> <span class='hs-varid'>makeSettableStateVar</span><span class='hs-layout'>,</span>
<a name="line-61"></a> <span class='hs-conid'>StateVar</span><span class='hs-layout'>,</span> <span class='hs-varid'>makeStateVar</span> <span class='hs-layout'>)</span>
<a name="line-62"></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'>GLUT</span><span class='hs-varop'>.</span><span class='hs-conid'>Constants</span> <span class='hs-layout'>(</span>
<a name="line-63"></a> <span class='hs-varid'>glut_WINDOW_PARENT</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_WINDOW_NUM_CHILDREN</span><span class='hs-layout'>,</span>
<a name="line-64"></a> <span class='hs-varid'>glut_WINDOW_X</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_WINDOW_Y</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_WINDOW_WIDTH</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_WINDOW_HEIGHT</span><span class='hs-layout'>,</span>
<a name="line-65"></a> <span class='hs-varid'>glut_CURSOR_RIGHT_ARROW</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_LEFT_ARROW</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_INFO</span><span class='hs-layout'>,</span>
<a name="line-66"></a> <span class='hs-varid'>glut_CURSOR_DESTROY</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_HELP</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_CYCLE</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_SPRAY</span><span class='hs-layout'>,</span>
<a name="line-67"></a> <span class='hs-varid'>glut_CURSOR_WAIT</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_TEXT</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_CROSSHAIR</span><span class='hs-layout'>,</span>
<a name="line-68"></a> <span class='hs-varid'>glut_CURSOR_UP_DOWN</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_LEFT_RIGHT</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_TOP_SIDE</span><span class='hs-layout'>,</span>
<a name="line-69"></a> <span class='hs-varid'>glut_CURSOR_BOTTOM_SIDE</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_LEFT_SIDE</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_RIGHT_SIDE</span><span class='hs-layout'>,</span>
<a name="line-70"></a> <span class='hs-varid'>glut_CURSOR_TOP_LEFT_CORNER</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_TOP_RIGHT_CORNER</span><span class='hs-layout'>,</span>
<a name="line-71"></a> <span class='hs-varid'>glut_CURSOR_BOTTOM_RIGHT_CORNER</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_BOTTOM_LEFT_CORNER</span><span class='hs-layout'>,</span>
<a name="line-72"></a> <span class='hs-varid'>glut_CURSOR_INHERIT</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_NONE</span><span class='hs-layout'>,</span> <span class='hs-varid'>glut_CURSOR_FULL_CROSSHAIR</span><span class='hs-layout'>,</span>
<a name="line-73"></a> <span class='hs-varid'>glut_WINDOW_CURSOR</span> <span class='hs-layout'>)</span>
<a name="line-74"></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'>GLUT</span><span class='hs-varop'>.</span><span class='hs-conid'>Extensions</span>
<a name="line-75"></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'>GLUT</span><span class='hs-varop'>.</span><span class='hs-conid'>QueryUtils</span> <span class='hs-layout'>(</span> <span class='hs-varid'>simpleGet</span> <span class='hs-layout'>)</span>
<a name="line-76"></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'>GLUT</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Window</span><span class='hs-layout'>,</span> <span class='hs-varid'>makeWindow</span> <span class='hs-layout'>)</span>
<a name="line-77"></a>
<a name="line-78"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-79"></a>
<a name="line-80"></a><span class='hs-cpp'>#include "HsGLUTExt.h"</span>
<a name="line-81"></a>
<a name="line-82"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-83"></a>
<a name="line-84"></a><span class='hs-comment'>-- $CreatingAndDestroyingSubWindows</span>
<a name="line-85"></a><span class='hs-comment'>-- Each created window has a unique associated OpenGL context. State changes to</span>
<a name="line-86"></a><span class='hs-comment'>-- a window\'s associated OpenGL context can be done immediately after the</span>
<a name="line-87"></a><span class='hs-comment'>-- window is created.</span>
<a name="line-88"></a><span class='hs-comment'>--</span>
<a name="line-89"></a><span class='hs-comment'>-- The /display state/ of a window is initially for the window to be shown. But</span>
<a name="line-90"></a><span class='hs-comment'>-- the window\'s /display state/ is not actually acted upon until</span>
<a name="line-91"></a><span class='hs-comment'>-- 'Graphics.UI.GLUT.Begin.mainLoop' is entered. This means until</span>
<a name="line-92"></a><span class='hs-comment'>-- 'Graphics.UI.GLUT.Begin.mainLoop' is called, rendering to a created window is</span>
<a name="line-93"></a><span class='hs-comment'>-- ineffective because the window can not yet be displayed.</span>
<a name="line-94"></a><span class='hs-comment'>--</span>
<a name="line-95"></a><span class='hs-comment'>-- The value returned by 'createWindow' and 'createSubWindow' is a unique</span>
<a name="line-96"></a><span class='hs-comment'>-- identifier for the window, which can be used with 'currentWindow'.</span>
<a name="line-97"></a>
<a name="line-98"></a><span class='hs-comment'>-- | Create a top-level window. The given name will be provided to the window</span>
<a name="line-99"></a><span class='hs-comment'>-- system as the window\'s name. The intent is that the window system will label</span>
<a name="line-100"></a><span class='hs-comment'>-- the window with the name.Implicitly, the /current window/ is set to the newly</span>
<a name="line-101"></a><span class='hs-comment'>-- created window.</span>
<a name="line-102"></a><span class='hs-comment'>--</span>
<a name="line-103"></a><span class='hs-comment'>-- /X Implementation Notes:/ The proper X Inter-Client Communication Conventions</span>
<a name="line-104"></a><span class='hs-comment'>-- Manual (ICCCM) top-level properties are established. The @WM_COMMAND@</span>
<a name="line-105"></a><span class='hs-comment'>-- property that lists the command line used to invoke the GLUT program is only</span>
<a name="line-106"></a><span class='hs-comment'>-- established for the first window created.</span>
<a name="line-107"></a>
<a name="line-108"></a><a name="createWindow"></a><span class='hs-definition'>createWindow</span>
<a name="line-109"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ The window name</span>
<a name="line-110"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Window</span> <span class='hs-comment'>-- ^ The identifier for the newly created window</span>
<a name="line-111"></a><span class='hs-definition'>createWindow</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withCString</span> <span class='hs-varid'>name</span> <span class='hs-varid'>glutCreateWindow</span>
<a name="line-112"></a>
<a name="line-113"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutCreateWindow"</span> <span class='hs-varid'>glutCreateWindow</span> <span class='hs-keyglyph'>::</span>
<a name="line-114"></a> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Window</span>
<a name="line-115"></a>
<a name="line-116"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-117"></a>
<a name="line-118"></a><span class='hs-comment'>-- | Create a subwindow of the identified window with the given relative</span>
<a name="line-119"></a><span class='hs-comment'>-- position and size. Implicitly, the /current window/ is set to the</span>
<a name="line-120"></a><span class='hs-comment'>-- newly created subwindow. Subwindows can be nested arbitrarily deep.</span>
<a name="line-121"></a>
<a name="line-122"></a><a name="createSubWindow"></a><span class='hs-definition'>createSubWindow</span>
<a name="line-123"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Window</span> <span class='hs-comment'>-- ^ Identifier of the subwindow\'s parent window.</span>
<a name="line-124"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-comment'>-- ^ Window position in pixels relative to parent window\'s</span>
<a name="line-125"></a> <span class='hs-comment'>-- origin.</span>
<a name="line-126"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Size</span> <span class='hs-comment'>-- ^ Window size in pixels</span>
<a name="line-127"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Window</span> <span class='hs-comment'>-- ^ The identifier for the newly created subwindow</span>
<a name="line-128"></a><span class='hs-definition'>createSubWindow</span> <span class='hs-varid'>win</span> <span class='hs-layout'>(</span><span class='hs-conid'>Position</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Size</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-129"></a> <span class='hs-varid'>glutCreateSubWindow</span> <span class='hs-varid'>win</span>
<a name="line-130"></a> <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-131"></a> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-132"></a>
<a name="line-133"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutCreateSubWindow"</span> <span class='hs-varid'>glutCreateSubWindow</span> <span class='hs-keyglyph'>::</span>
<a name="line-134"></a> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Window</span>
<a name="line-135"></a>
<a name="line-136"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-137"></a>
<a name="line-138"></a><span class='hs-comment'>-- | Contains the /current window\'s/ parent. If the /current window/ is a</span>
<a name="line-139"></a><span class='hs-comment'>-- top-level window, 'Nothing' is returned.</span>
<a name="line-140"></a>
<a name="line-141"></a><a name="parentWindow"></a><span class='hs-definition'>parentWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GettableStateVar</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span>
<a name="line-142"></a><span class='hs-definition'>parentWindow</span> <span class='hs-keyglyph'>=</span>
<a name="line-143"></a> <span class='hs-varid'>makeGettableStateVar</span> <span class='hs-varop'>$</span>
<a name="line-144"></a> <span class='hs-varid'>getWindow</span> <span class='hs-layout'>(</span><span class='hs-varid'>simpleGet</span> <span class='hs-varid'>makeWindow</span> <span class='hs-varid'>glut_WINDOW_PARENT</span><span class='hs-layout'>)</span>
<a name="line-145"></a>
<a name="line-146"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-147"></a>
<a name="line-148"></a><span class='hs-comment'>-- | Contains the number of subwindows the /current window/ has, not counting</span>
<a name="line-149"></a><span class='hs-comment'>-- children of children.</span>
<a name="line-150"></a>
<a name="line-151"></a><a name="numSubWindows"></a><span class='hs-definition'>numSubWindows</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GettableStateVar</span> <span class='hs-conid'>Int</span>
<a name="line-152"></a><span class='hs-definition'>numSubWindows</span> <span class='hs-keyglyph'>=</span>
<a name="line-153"></a> <span class='hs-varid'>makeGettableStateVar</span> <span class='hs-varop'>$</span>
<a name="line-154"></a> <span class='hs-varid'>simpleGet</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>glut_WINDOW_NUM_CHILDREN</span>
<a name="line-155"></a>
<a name="line-156"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-157"></a>
<a name="line-158"></a><span class='hs-comment'>-- | Destroy the specified window and the window\'s associated OpenGL context,</span>
<a name="line-159"></a><span class='hs-comment'>-- logical colormap (if the window is color index), and overlay and related</span>
<a name="line-160"></a><span class='hs-comment'>-- state (if an overlay has been established). Any subwindows of the destroyed</span>
<a name="line-161"></a><span class='hs-comment'>-- window are also destroyed by 'destroyWindow'. If the specified window was the</span>
<a name="line-162"></a><span class='hs-comment'>-- /current window/, the /current window/ becomes invalid ('currentWindow' will</span>
<a name="line-163"></a><span class='hs-comment'>-- contain 'Nothing').</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-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutDestroyWindow"</span> <span class='hs-varid'>destroyWindow</span> <span class='hs-keyglyph'>::</span>
<a name="line-166"></a> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-167"></a>
<a name="line-168"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-169"></a>
<a name="line-170"></a><span class='hs-comment'>-- | Controls the /current window/. It does /not/ affect the /layer in use/ for</span>
<a name="line-171"></a><span class='hs-comment'>-- the window; this is done using 'Graphics.UI.GLUT.Overlay.layerInUse'.</span>
<a name="line-172"></a><span class='hs-comment'>-- Contains 'Nothing' if no windows exist or the previously /current window/ was</span>
<a name="line-173"></a><span class='hs-comment'>-- destroyed. Setting the /current window/ to 'Nothing' is a no-op.</span>
<a name="line-174"></a>
<a name="line-175"></a><a name="currentWindow"></a><span class='hs-definition'>currentWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>StateVar</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span>
<a name="line-176"></a><span class='hs-definition'>currentWindow</span> <span class='hs-keyglyph'>=</span>
<a name="line-177"></a> <span class='hs-varid'>makeStateVar</span> <span class='hs-layout'>(</span><span class='hs-varid'>getWindow</span> <span class='hs-varid'>glutGetWindow</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-varid'>glutSetWindow</span><span class='hs-layout'>)</span>
<a name="line-178"></a>
<a name="line-179"></a><a name="getWindow"></a><span class='hs-definition'>getWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Window</span><span class='hs-layout'>)</span>
<a name="line-180"></a><span class='hs-definition'>getWindow</span> <span class='hs-varid'>act</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-181"></a> <span class='hs-varid'>win</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>act</span>
<a name="line-182"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>win</span> <span class='hs-varop'>==</span> <span class='hs-varid'>makeWindow</span> <span class='hs-num'>0</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>win</span>
<a name="line-183"></a>
<a name="line-184"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutSetWindow"</span> <span class='hs-varid'>glutSetWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-185"></a>
<a name="line-186"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutGetWindow"</span> <span class='hs-varid'>glutGetWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Window</span>
<a name="line-187"></a>
<a name="line-188"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-189"></a>
<a name="line-190"></a><span class='hs-comment'>-- | Mark the normal plane of given window (or the /current window/, if none</span>
<a name="line-191"></a><span class='hs-comment'>-- is supplied) as needing to be redisplayed. The next iteration through</span>
<a name="line-192"></a><span class='hs-comment'>-- 'Graphics.UI.GLUT.Begin.mainLoop', the window\'s display callback will be</span>
<a name="line-193"></a><span class='hs-comment'>-- called to redisplay the window\'s normal plane. Multiple calls to</span>
<a name="line-194"></a><span class='hs-comment'>-- 'postRedisplay' before the next display callback opportunity generates only a</span>
<a name="line-195"></a><span class='hs-comment'>-- single redisplay callback. 'postRedisplay' may be called within a window\'s</span>
<a name="line-196"></a><span class='hs-comment'>-- display or overlay display callback to re-mark that window for redisplay.</span>
<a name="line-197"></a><span class='hs-comment'>--</span>
<a name="line-198"></a><span class='hs-comment'>-- Logically, normal plane damage notification for a window is treated as a</span>
<a name="line-199"></a><span class='hs-comment'>-- 'postRedisplay' on the damaged window. Unlike damage reported by the window</span>
<a name="line-200"></a><span class='hs-comment'>-- system, 'postRedisplay' will /not/ set to true the normal plane\'s damaged</span>
<a name="line-201"></a><span class='hs-comment'>-- status (see 'Graphics.UI.GLUT.State.damaged').</span>
<a name="line-202"></a><span class='hs-comment'>--</span>
<a name="line-203"></a><span class='hs-comment'>-- Also, see 'Graphics.UI.GLUT.Overlay.postOverlayRedisplay'.</span>
<a name="line-204"></a>
<a name="line-205"></a><a name="postRedisplay"></a><span class='hs-definition'>postRedisplay</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-206"></a><span class='hs-definition'>postRedisplay</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>glutPostRedisplay</span> <span class='hs-varid'>glutPostWindowRedisplay</span>
<a name="line-207"></a>
<a name="line-208"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutPostRedisplay"</span> <span class='hs-varid'>glutPostRedisplay</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-209"></a>
<a name="line-210"></a><span class='hs-comment'>-- | Mark the normal plane of the given window as needing to be redisplayed,</span>
<a name="line-211"></a><span class='hs-comment'>-- otherwise the same as 'postRedisplay'.</span>
<a name="line-212"></a><span class='hs-comment'>--</span>
<a name="line-213"></a><span class='hs-comment'>-- The advantage of this routine is that it saves the cost of using</span>
<a name="line-214"></a><span class='hs-comment'>-- 'currentWindow' (entailing an expensive OpenGL context switch), which is</span>
<a name="line-215"></a><span class='hs-comment'>-- particularly useful when multiple windows need redisplays posted at the same</span>
<a name="line-216"></a><span class='hs-comment'>-- time.</span>
<a name="line-217"></a>
<a name="line-218"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutPostWindowRedisplay"</span>
<a name="line-219"></a> <span class='hs-varid'>glutPostWindowRedisplay</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Window</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-220"></a>
<a name="line-221"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-222"></a>
<a name="line-223"></a><span class='hs-comment'>-- | Perform a buffer swap on the /layer in use/ for the /current window/.</span>
<a name="line-224"></a><span class='hs-comment'>-- Specifically, 'swapBuffers' promotes the contents of the back buffer of the</span>
<a name="line-225"></a><span class='hs-comment'>-- /layer in use/ of the /current window/ to become the contents of the front</span>
<a name="line-226"></a><span class='hs-comment'>-- buffer. The contents of the back buffer then become undefined. The update</span>
<a name="line-227"></a><span class='hs-comment'>-- typically takes place during the vertical retrace of the monitor, rather than</span>
<a name="line-228"></a><span class='hs-comment'>-- immediately after 'swapBuffers' is called.</span>
<a name="line-229"></a><span class='hs-comment'>--</span>
<a name="line-230"></a><span class='hs-comment'>-- An implicit 'Graphics.Rendering.OpenGL.GL.FlushFinish.flush' is done by</span>
<a name="line-231"></a><span class='hs-comment'>-- 'swapBuffers' before it returns. Subsequent OpenGL commands can be issued</span>
<a name="line-232"></a><span class='hs-comment'>-- immediately after calling 'swapBuffers', but are not executed until the</span>
<a name="line-233"></a><span class='hs-comment'>-- buffer exchange is completed.</span>
<a name="line-234"></a><span class='hs-comment'>--</span>
<a name="line-235"></a><span class='hs-comment'>-- If the /layer in use/ is not double buffered, 'swapBuffers' has no effect.</span>
<a name="line-236"></a>
<a name="line-237"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutSwapBuffers"</span> <span class='hs-varid'>swapBuffers</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-238"></a>
<a name="line-239"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-240"></a>
<a name="line-241"></a><span class='hs-comment'>-- $ChangingTheWindowGeometry</span>
<a name="line-242"></a><span class='hs-comment'>-- Note that the requests by 'windowPosition', 'windowSize', and 'fullScreen'</span>
<a name="line-243"></a><span class='hs-comment'>-- are not processed immediately. A request is executed after returning to the</span>
<a name="line-244"></a><span class='hs-comment'>-- main event loop. This allows multiple requests to the same window to be</span>
<a name="line-245"></a><span class='hs-comment'>-- coalesced.</span>
<a name="line-246"></a><span class='hs-comment'>--</span>
<a name="line-247"></a><span class='hs-comment'>-- 'windowPosition' and 'windowSize' requests on a window will disable the full</span>
<a name="line-248"></a><span class='hs-comment'>-- screen status of the window.</span>
<a name="line-249"></a>
<a name="line-250"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-251"></a>
<a name="line-252"></a><span class='hs-comment'>-- | Controls the position of the /current window/. For top-level windows,</span>
<a name="line-253"></a><span class='hs-comment'>-- parameters of 'Position' are pixel offsets from the screen origin. For</span>
<a name="line-254"></a><span class='hs-comment'>-- subwindows, the parameters are pixel offsets from the window\'s parent window</span>
<a name="line-255"></a><span class='hs-comment'>-- origin.</span>
<a name="line-256"></a><span class='hs-comment'>--</span>
<a name="line-257"></a><span class='hs-comment'>-- In the case of top-level windows, setting 'windowPosition' is considered only</span>
<a name="line-258"></a><span class='hs-comment'>-- a request for positioning the window. The window system is free to apply its</span>
<a name="line-259"></a><span class='hs-comment'>-- own policies to top-level window placement. The intent is that top-level</span>
<a name="line-260"></a><span class='hs-comment'>-- windows should be repositioned according to the value of 'windowPosition'.</span>
<a name="line-261"></a>
<a name="line-262"></a><a name="windowPosition"></a><span class='hs-definition'>windowPosition</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>StateVar</span> <span class='hs-conid'>Position</span>
<a name="line-263"></a><span class='hs-definition'>windowPosition</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeStateVar</span> <span class='hs-varid'>getWindowPosition</span> <span class='hs-varid'>setWindowPosition</span>
<a name="line-264"></a>
<a name="line-265"></a><a name="setWindowPosition"></a><span class='hs-definition'>setWindowPosition</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-266"></a><span class='hs-definition'>setWindowPosition</span> <span class='hs-layout'>(</span><span class='hs-conid'>Position</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-267"></a> <span class='hs-varid'>glutPositionWindow</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-268"></a>
<a name="line-269"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutPositionWindow"</span> <span class='hs-varid'>glutPositionWindow</span> <span class='hs-keyglyph'>::</span>
<a name="line-270"></a> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-271"></a>
<a name="line-272"></a><a name="getWindowPosition"></a><span class='hs-definition'>getWindowPosition</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Position</span>
<a name="line-273"></a><span class='hs-definition'>getWindowPosition</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-274"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>simpleGet</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>glut_WINDOW_X</span>
<a name="line-275"></a> <span class='hs-varid'>y</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>simpleGet</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>glut_WINDOW_Y</span>
<a name="line-276"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Position</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-277"></a>
<a name="line-278"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-279"></a>
<a name="line-280"></a><span class='hs-comment'>-- | Controls the size of the /current window/. The parameters of 'Size' are</span>
<a name="line-281"></a><span class='hs-comment'>-- size extents in pixels. The width and height must be positive values.</span>
<a name="line-282"></a><span class='hs-comment'>--</span>
<a name="line-283"></a><span class='hs-comment'>-- In the case of top-level windows, setting 'windowSize' is considered only a</span>
<a name="line-284"></a><span class='hs-comment'>-- request for sizing the window. The window system is free to apply its own</span>
<a name="line-285"></a><span class='hs-comment'>-- policies to top-level window sizing. The intent is that top-level windows</span>
<a name="line-286"></a><span class='hs-comment'>-- should be reshaped according to the value of 'windowSize'. Whether a reshape</span>
<a name="line-287"></a><span class='hs-comment'>-- actually takes effect and, if so, the reshaped dimensions are reported to the</span>
<a name="line-288"></a><span class='hs-comment'>-- program by a reshape callback.</span>
<a name="line-289"></a>
<a name="line-290"></a><a name="windowSize"></a><span class='hs-definition'>windowSize</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>StateVar</span> <span class='hs-conid'>Size</span>
<a name="line-291"></a><span class='hs-definition'>windowSize</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeStateVar</span> <span class='hs-varid'>getWindowSize</span> <span class='hs-varid'>setWindowSize</span>
<a name="line-292"></a>
<a name="line-293"></a><a name="setWindowSize"></a><span class='hs-definition'>setWindowSize</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Size</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-294"></a><span class='hs-definition'>setWindowSize</span> <span class='hs-layout'>(</span><span class='hs-conid'>Size</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-295"></a> <span class='hs-varid'>glutReshapeWindow</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-296"></a>
<a name="line-297"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutReshapeWindow"</span> <span class='hs-varid'>glutReshapeWindow</span> <span class='hs-keyglyph'>::</span>
<a name="line-298"></a> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-299"></a>
<a name="line-300"></a><a name="getWindowSize"></a><span class='hs-definition'>getWindowSize</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Size</span>
<a name="line-301"></a><span class='hs-definition'>getWindowSize</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-302"></a> <span class='hs-varid'>w</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>simpleGet</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>glut_WINDOW_WIDTH</span>
<a name="line-303"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>simpleGet</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>glut_WINDOW_HEIGHT</span>
<a name="line-304"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Size</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span>
<a name="line-305"></a>
<a name="line-306"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-307"></a>
<a name="line-308"></a><span class='hs-comment'>-- | Request that the /current window/ be made full screen. The exact semantics</span>
<a name="line-309"></a><span class='hs-comment'>-- of what full screen means may vary by window system. The intent is to make</span>
<a name="line-310"></a><span class='hs-comment'>-- the window as large as possible and disable any window decorations or borders</span>
<a name="line-311"></a><span class='hs-comment'>-- added the window system. The window width and height are not guaranteed to be</span>
<a name="line-312"></a><span class='hs-comment'>-- the same as the screen width and height, but that is the intent of making a</span>
<a name="line-313"></a><span class='hs-comment'>-- window full screen.</span>
<a name="line-314"></a><span class='hs-comment'>--</span>
<a name="line-315"></a><span class='hs-comment'>-- 'fullScreen' is defined to work only on top-level windows.</span>
<a name="line-316"></a><span class='hs-comment'>--</span>
<a name="line-317"></a><span class='hs-comment'>-- /X Implementation Notes:/ In the X implementation of GLUT, full screen is</span>
<a name="line-318"></a><span class='hs-comment'>-- implemented by sizing and positioning the window to cover the entire screen</span>
<a name="line-319"></a><span class='hs-comment'>-- and posting the @_MOTIF_WM_HINTS@ property on the window requesting</span>
<a name="line-320"></a><span class='hs-comment'>-- absolutely no decorations. Non-Motif window managers may not respond to</span>
<a name="line-321"></a><span class='hs-comment'>-- @_MOTIF_WM_HINTS@.</span>
<a name="line-322"></a>
<a name="line-323"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutFullScreen"</span> <span class='hs-varid'>fullScreen</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-324"></a>
<a name="line-325"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-326"></a>
<a name="line-327"></a><span class='hs-comment'>-- | (/freeglut only/) Toggle between windowed and full screen mode.</span>
<a name="line-328"></a>
<a name="line-329"></a><a name="fullScreenToggle"></a><span class='hs-definition'>fullScreenToggle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-330"></a><span class='hs-definition'>fullScreenToggle</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>glutFullScreenToggle</span>
<a name="line-331"></a>
<a name="line-332"></a><span class='hs-conid'>EXTENSION_ENTRY</span><span class='hs-layout'>(</span><span class='hs-keyword'>unsafe</span><span class='hs-layout'>,</span><span class='hs-str'>"freeglut"</span><span class='hs-layout'>,</span><span class='hs-varid'>glutFullScreenToggle</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-333"></a>
<a name="line-334"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-335"></a>
<a name="line-336"></a><span class='hs-comment'>-- $ManipulatingTheStackingOrder</span>
<a name="line-337"></a><span class='hs-comment'>-- 'pushWindow' and 'popWindow' work on both top-level windows and subwindows.</span>
<a name="line-338"></a><span class='hs-comment'>-- The effect of pushing and popping windows does not take place immediately.</span>
<a name="line-339"></a><span class='hs-comment'>-- Instead the push or pop is saved for execution upon return to the GLUT event</span>
<a name="line-340"></a><span class='hs-comment'>-- loop. Subsequent pop or push requests on a window replace the previously</span>
<a name="line-341"></a><span class='hs-comment'>-- saved request for that window. The effect of pushing and popping top-level</span>
<a name="line-342"></a><span class='hs-comment'>-- windows is subject to the window system\'s policy for restacking windows.</span>
<a name="line-343"></a>
<a name="line-344"></a><span class='hs-comment'>-- | Change the stacking order of the /current window/ relative to its siblings</span>
<a name="line-345"></a><span class='hs-comment'>-- (lowering it).</span>
<a name="line-346"></a>
<a name="line-347"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutPushWindow"</span> <span class='hs-varid'>pushWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-348"></a>
<a name="line-349"></a><span class='hs-comment'>-- | Change the stacking order of the /current window/ relative to its siblings,</span>
<a name="line-350"></a><span class='hs-comment'>-- bringing the /current window/ closer to the top.</span>
<a name="line-351"></a>
<a name="line-352"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutPopWindow"</span> <span class='hs-varid'>popWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-353"></a>
<a name="line-354"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-355"></a>
<a name="line-356"></a><span class='hs-comment'>-- | The display status of a window.</span>
<a name="line-357"></a>
<a name="line-358"></a><a name="WindowStatus"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>WindowStatus</span>
<a name="line-359"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Shown</span>
<a name="line-360"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Hidden</span>
<a name="line-361"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Iconified</span>
<a name="line-362"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>)</span>
<a name="line-363"></a>
<a name="line-364"></a><span class='hs-comment'>-- | Controls the display status of the /current window/.</span>
<a name="line-365"></a><span class='hs-comment'>--</span>
<a name="line-366"></a><span class='hs-comment'>-- Note that the effect of showing, hiding, and iconifying windows does not take</span>
<a name="line-367"></a><span class='hs-comment'>-- place immediately. Instead the requests are saved for execution upon return</span>
<a name="line-368"></a><span class='hs-comment'>-- to the GLUT event loop. Subsequent show, hide, or iconification requests on a</span>
<a name="line-369"></a><span class='hs-comment'>-- window replace the previously saved request for that window. The effect of</span>
<a name="line-370"></a><span class='hs-comment'>-- hiding, showing, or iconifying top-level windows is subject to the window</span>
<a name="line-371"></a><span class='hs-comment'>-- system\'s policy for displaying windows. Subwindows can\'t be iconified.</span>
<a name="line-372"></a>
<a name="line-373"></a><a name="windowStatus"></a><span class='hs-definition'>windowStatus</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SettableStateVar</span> <span class='hs-conid'>WindowStatus</span>
<a name="line-374"></a><span class='hs-definition'>windowStatus</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeSettableStateVar</span> <span class='hs-varid'>setStatus</span>
<a name="line-375"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>setStatus</span> <span class='hs-conid'>Shown</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>glutShowWindow</span>
<a name="line-376"></a> <span class='hs-varid'>setStatus</span> <span class='hs-conid'>Hidden</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>glutHideWindow</span>
<a name="line-377"></a> <span class='hs-varid'>setStatus</span> <span class='hs-conid'>Iconified</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>glutIconifyWindow</span>
<a name="line-378"></a>
<a name="line-379"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutShowWindow"</span> <span class='hs-varid'>glutShowWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-380"></a>
<a name="line-381"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutHideWindow"</span> <span class='hs-varid'>glutHideWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-382"></a>
<a name="line-383"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutIconifyWindow"</span> <span class='hs-varid'>glutIconifyWindow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-384"></a>
<a name="line-385"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-386"></a>
<a name="line-387"></a><span class='hs-comment'>-- $ChangingTheWindowIconTitle</span>
<a name="line-388"></a><span class='hs-comment'>-- 'windowTitle' and 'iconTitle' should be set only when the /current</span>
<a name="line-389"></a><span class='hs-comment'>-- window/ is a top-level window. Upon creation of a top-level window, the</span>
<a name="line-390"></a><span class='hs-comment'>-- window and icon names are determined by the name given to 'createWindow'.</span>
<a name="line-391"></a><span class='hs-comment'>-- Once created, setting 'windowTitle' and 'iconTitle' can change the window and</span>
<a name="line-392"></a><span class='hs-comment'>-- icon names respectively of top-level windows. Each call requests the window</span>
<a name="line-393"></a><span class='hs-comment'>-- system change the title appropriately. Requests are not buffered or</span>
<a name="line-394"></a><span class='hs-comment'>-- coalesced. The policy by which the window and icon name are displayed is</span>
<a name="line-395"></a><span class='hs-comment'>-- window system dependent.</span>
<a name="line-396"></a>
<a name="line-397"></a><span class='hs-comment'>-- | Controls the window title of the /current top-level window/.</span>
<a name="line-398"></a>
<a name="line-399"></a><a name="windowTitle"></a><span class='hs-definition'>windowTitle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SettableStateVar</span> <span class='hs-conid'>String</span>
<a name="line-400"></a><span class='hs-definition'>windowTitle</span> <span class='hs-keyglyph'>=</span>
<a name="line-401"></a> <span class='hs-varid'>makeSettableStateVar</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>name</span> <span class='hs-keyglyph'>-></span>
<a name="line-402"></a> <span class='hs-varid'>withCString</span> <span class='hs-varid'>name</span> <span class='hs-varid'>glutSetWindowTitle</span>
<a name="line-403"></a>
<a name="line-404"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutSetWindowTitle"</span> <span class='hs-varid'>glutSetWindowTitle</span> <span class='hs-keyglyph'>::</span>
<a name="line-405"></a> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-406"></a>
<a name="line-407"></a><span class='hs-comment'>-- | Controls the icon title of the /current top-level window/.</span>
<a name="line-408"></a>
<a name="line-409"></a><a name="iconTitle"></a><span class='hs-definition'>iconTitle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SettableStateVar</span> <span class='hs-conid'>String</span>
<a name="line-410"></a><span class='hs-definition'>iconTitle</span> <span class='hs-keyglyph'>=</span>
<a name="line-411"></a> <span class='hs-varid'>makeSettableStateVar</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>name</span> <span class='hs-keyglyph'>-></span>
<a name="line-412"></a> <span class='hs-varid'>withCString</span> <span class='hs-varid'>name</span> <span class='hs-varid'>glutSetIconTitle</span>
<a name="line-413"></a>
<a name="line-414"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutSetIconTitle"</span> <span class='hs-varid'>glutSetIconTitle</span> <span class='hs-keyglyph'>::</span>
<a name="line-415"></a> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-416"></a>
<a name="line-417"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-418"></a>
<a name="line-419"></a><span class='hs-comment'>-- | The different cursor images GLUT supports.</span>
<a name="line-420"></a>
<a name="line-421"></a><a name="Cursor"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Cursor</span>
<a name="line-422"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>RightArrow</span> <span class='hs-comment'>-- ^ Arrow pointing up and to the right.</span>
<a name="line-423"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LeftArrow</span> <span class='hs-comment'>-- ^ Arrow pointing up and to the left.</span>
<a name="line-424"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Info</span> <span class='hs-comment'>-- ^ Pointing hand.</span>
<a name="line-425"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Destroy</span> <span class='hs-comment'>-- ^ Skull & cross bones.</span>
<a name="line-426"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Help</span> <span class='hs-comment'>-- ^ Question mark.</span>
<a name="line-427"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Cycle</span> <span class='hs-comment'>-- ^ Arrows rotating in a circle.</span>
<a name="line-428"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Spray</span> <span class='hs-comment'>-- ^ Spray can.</span>
<a name="line-429"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Wait</span> <span class='hs-comment'>-- ^ Wrist watch.</span>
<a name="line-430"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Text</span> <span class='hs-comment'>-- ^ Insertion point cursor for text.</span>
<a name="line-431"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Crosshair</span> <span class='hs-comment'>-- ^ Simple cross-hair.</span>
<a name="line-432"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>UpDown</span> <span class='hs-comment'>-- ^ Bi-directional pointing up & down.</span>
<a name="line-433"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LeftRight</span> <span class='hs-comment'>-- ^ Bi-directional pointing left & right.</span>
<a name="line-434"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>TopSide</span> <span class='hs-comment'>-- ^ Arrow pointing to top side.</span>
<a name="line-435"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>BottomSide</span> <span class='hs-comment'>-- ^ Arrow pointing to bottom side.</span>
<a name="line-436"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LeftSide</span> <span class='hs-comment'>-- ^ Arrow pointing to left side.</span>
<a name="line-437"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>RightSide</span> <span class='hs-comment'>-- ^ Arrow pointing to right side.</span>
<a name="line-438"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>TopLeftCorner</span> <span class='hs-comment'>-- ^ Arrow pointing to top-left corner.</span>
<a name="line-439"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>TopRightCorner</span> <span class='hs-comment'>-- ^ Arrow pointing to top-right corner.</span>
<a name="line-440"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>BottomRightCorner</span> <span class='hs-comment'>-- ^ Arrow pointing to bottom-left corner.</span>
<a name="line-441"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>BottomLeftCorner</span> <span class='hs-comment'>-- ^ Arrow pointing to bottom-right corner.</span>
<a name="line-442"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Inherit</span> <span class='hs-comment'>-- ^ Use parent\'s cursor.</span>
<a name="line-443"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>None</span> <span class='hs-comment'>-- ^ Invisible cursor.</span>
<a name="line-444"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>FullCrosshair</span> <span class='hs-comment'>-- ^ Full-screen cross-hair cursor (if possible, otherwise 'Crosshair').</span>
<a name="line-445"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>)</span>
<a name="line-446"></a>
<a name="line-447"></a><a name="marshalCursor"></a><span class='hs-definition'>marshalCursor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cursor</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span>
<a name="line-448"></a><span class='hs-definition'>marshalCursor</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-449"></a> <span class='hs-conid'>RightArrow</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_RIGHT_ARROW</span>
<a name="line-450"></a> <span class='hs-conid'>LeftArrow</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_LEFT_ARROW</span>
<a name="line-451"></a> <span class='hs-conid'>Info</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_INFO</span>
<a name="line-452"></a> <span class='hs-conid'>Destroy</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_DESTROY</span>
<a name="line-453"></a> <span class='hs-conid'>Help</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_HELP</span>
<a name="line-454"></a> <span class='hs-conid'>Cycle</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_CYCLE</span>
<a name="line-455"></a> <span class='hs-conid'>Spray</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_SPRAY</span>
<a name="line-456"></a> <span class='hs-conid'>Wait</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_WAIT</span>
<a name="line-457"></a> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_TEXT</span>
<a name="line-458"></a> <span class='hs-conid'>Crosshair</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_CROSSHAIR</span>
<a name="line-459"></a> <span class='hs-conid'>UpDown</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_UP_DOWN</span>
<a name="line-460"></a> <span class='hs-conid'>LeftRight</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_LEFT_RIGHT</span>
<a name="line-461"></a> <span class='hs-conid'>TopSide</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_TOP_SIDE</span>
<a name="line-462"></a> <span class='hs-conid'>BottomSide</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_BOTTOM_SIDE</span>
<a name="line-463"></a> <span class='hs-conid'>LeftSide</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_LEFT_SIDE</span>
<a name="line-464"></a> <span class='hs-conid'>RightSide</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_RIGHT_SIDE</span>
<a name="line-465"></a> <span class='hs-conid'>TopLeftCorner</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_TOP_LEFT_CORNER</span>
<a name="line-466"></a> <span class='hs-conid'>TopRightCorner</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_TOP_RIGHT_CORNER</span>
<a name="line-467"></a> <span class='hs-conid'>BottomRightCorner</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_BOTTOM_RIGHT_CORNER</span>
<a name="line-468"></a> <span class='hs-conid'>BottomLeftCorner</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_BOTTOM_LEFT_CORNER</span>
<a name="line-469"></a> <span class='hs-conid'>Inherit</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_INHERIT</span>
<a name="line-470"></a> <span class='hs-conid'>None</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_NONE</span>
<a name="line-471"></a> <span class='hs-conid'>FullCrosshair</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>glut_CURSOR_FULL_CROSSHAIR</span>
<a name="line-472"></a>
<a name="line-473"></a><a name="unmarshalCursor"></a><span class='hs-definition'>unmarshalCursor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Cursor</span>
<a name="line-474"></a><span class='hs-definition'>unmarshalCursor</span> <span class='hs-varid'>x</span>
<a name="line-475"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_RIGHT_ARROW</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>RightArrow</span>
<a name="line-476"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_LEFT_ARROW</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LeftArrow</span>
<a name="line-477"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_INFO</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Info</span>
<a name="line-478"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_DESTROY</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Destroy</span>
<a name="line-479"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_HELP</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Help</span>
<a name="line-480"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_CYCLE</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Cycle</span>
<a name="line-481"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_SPRAY</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Spray</span>
<a name="line-482"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_WAIT</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Wait</span>
<a name="line-483"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_TEXT</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Text</span>
<a name="line-484"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_CROSSHAIR</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Crosshair</span>
<a name="line-485"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_UP_DOWN</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>UpDown</span>
<a name="line-486"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_LEFT_RIGHT</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LeftRight</span>
<a name="line-487"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_TOP_SIDE</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TopSide</span>
<a name="line-488"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_BOTTOM_SIDE</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BottomSide</span>
<a name="line-489"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_LEFT_SIDE</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LeftSide</span>
<a name="line-490"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_RIGHT_SIDE</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>RightSide</span>
<a name="line-491"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_TOP_LEFT_CORNER</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TopLeftCorner</span>
<a name="line-492"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_TOP_RIGHT_CORNER</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TopRightCorner</span>
<a name="line-493"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_BOTTOM_RIGHT_CORNER</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BottomRightCorner</span>
<a name="line-494"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_BOTTOM_LEFT_CORNER</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BottomLeftCorner</span>
<a name="line-495"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_INHERIT</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Inherit</span>
<a name="line-496"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_NONE</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>None</span>
<a name="line-497"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glut_CURSOR_FULL_CROSSHAIR</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FullCrosshair</span>
<a name="line-498"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-layout'>(</span><span class='hs-str'>"unmarshalCursor: illegal value "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-499"></a>
<a name="line-500"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-501"></a>
<a name="line-502"></a><span class='hs-comment'>-- | Change the cursor image of the /current window/. Each call requests the</span>
<a name="line-503"></a><span class='hs-comment'>-- window system change the cursor appropriately. The cursor image when a window</span>
<a name="line-504"></a><span class='hs-comment'>-- is created is 'Inherit'. The exact cursor images used are implementation</span>
<a name="line-505"></a><span class='hs-comment'>-- dependent. The intent is for the image to convey the meaning of the cursor</span>
<a name="line-506"></a><span class='hs-comment'>-- name. For a top-level window, 'Inherit' uses the default window system</span>
<a name="line-507"></a><span class='hs-comment'>-- cursor.</span>
<a name="line-508"></a><span class='hs-comment'>--</span>
<a name="line-509"></a><span class='hs-comment'>-- /X Implementation Notes:/ GLUT for X uses SGI\'s @_SGI_CROSSHAIR_CURSOR@</span>
<a name="line-510"></a><span class='hs-comment'>-- convention to access a full-screen cross-hair cursor if possible.</span>
<a name="line-511"></a>
<a name="line-512"></a><a name="cursor"></a><span class='hs-definition'>cursor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>StateVar</span> <span class='hs-conid'>Cursor</span>
<a name="line-513"></a><span class='hs-definition'>cursor</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeStateVar</span> <span class='hs-varid'>getCursor</span> <span class='hs-varid'>setCursor</span>
<a name="line-514"></a>
<a name="line-515"></a><a name="setCursor"></a><span class='hs-definition'>setCursor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cursor</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-516"></a><span class='hs-definition'>setCursor</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>glutSetCursor</span> <span class='hs-varop'>.</span> <span class='hs-varid'>marshalCursor</span>
<a name="line-517"></a>
<a name="line-518"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutSetCursor"</span> <span class='hs-varid'>glutSetCursor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-519"></a>
<a name="line-520"></a><a name="getCursor"></a><span class='hs-definition'>getCursor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Cursor</span>
<a name="line-521"></a><span class='hs-definition'>getCursor</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>simpleGet</span> <span class='hs-varid'>unmarshalCursor</span> <span class='hs-varid'>glut_WINDOW_CURSOR</span>
<a name="line-522"></a>
<a name="line-523"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-524"></a>
<a name="line-525"></a><span class='hs-comment'>-- | Setting 'pointerPosition' warps the window system\'s pointer to a new</span>
<a name="line-526"></a><span class='hs-comment'>-- location relative to the origin of the /current window/ by the specified</span>
<a name="line-527"></a><span class='hs-comment'>-- pixel offset, which may be negative. The warp is done immediately.</span>
<a name="line-528"></a><span class='hs-comment'>--</span>
<a name="line-529"></a><span class='hs-comment'>-- If the pointer would be warped outside the screen\'s frame buffer region, the</span>
<a name="line-530"></a><span class='hs-comment'>-- location will be clamped to the nearest screen edge. The window system is</span>
<a name="line-531"></a><span class='hs-comment'>-- allowed to further constrain the pointer\'s location in window system</span>
<a name="line-532"></a><span class='hs-comment'>-- dependent ways.</span>
<a name="line-533"></a><span class='hs-comment'>--</span>
<a name="line-534"></a><span class='hs-comment'>-- Good advice from Xlib\'s @XWarpPointer@ man page: \"There is seldom any</span>
<a name="line-535"></a><span class='hs-comment'>-- reason for calling this function. The pointer should normally be left to the</span>
<a name="line-536"></a><span class='hs-comment'>-- user.\"</span>
<a name="line-537"></a>
<a name="line-538"></a><a name="pointerPosition"></a><span class='hs-definition'>pointerPosition</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SettableStateVar</span> <span class='hs-conid'>Position</span>
<a name="line-539"></a><span class='hs-definition'>pointerPosition</span> <span class='hs-keyglyph'>=</span>
<a name="line-540"></a> <span class='hs-varid'>makeSettableStateVar</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Position</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-541"></a> <span class='hs-varid'>glutWarpPointer</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-542"></a>
<a name="line-543"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"glutWarpPointer"</span> <span class='hs-varid'>glutWarpPointer</span> <span class='hs-keyglyph'>::</span>
<a name="line-544"></a> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
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