 | GLUT-2.1.1.1: A binding for the OpenGL Utility Toolkit | Contents | Index |
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| Graphics.UI.GLUT.Menu | | Portability | portable | | Stability | stable | | Maintainer | sven.panne@aedion.de |
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| Description |
| GLUT supports simple cascading pop-up menus. They are designed to let a user
select various modes within a program. The functionality is simple and
minimalistic and is meant to be that way. Do not mistake GLUT's pop-up menu
facility with an attempt to create a full-featured user interface.
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| Synopsis |
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| Documentation |
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| newtype Menu |
| A menu is simply a list of menu items.
| | Constructors | |
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| data MenuItem |
| A single item within a menu can either be a plain menu entry or a sub-menu
entry, allowing for arbitrarily deep nested menus.
| | Constructors | | MenuEntry String MenuCallback | A plain menu entry with an associated
callback, which is triggered when the
user selects the entry
| | SubMenu String Menu | A sub-menu, which is cascaded when the
user selects the entry, allowing
sub-menu entries to be selected
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| type MenuCallback = IO () |
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| attachMenu :: MouseButton -> Menu -> IO () |
Create a new pop-up menu for the current window, attaching it to the
given mouse button. A previously attached menu (if any), is detached before
and won't receive callbacks anymore.
It is illegal to call attachMenu while any (sub-)menu is in use, i.e.
popped up.
X Implementation Notes: If available, GLUT for X will take advantage of
overlay planes for implementing pop-up menus. The use of overlay planes can
eliminate display callbacks when pop-up menus are deactivated. The
SERVER_OVERLAY_VISUALS convention is used to determine if overlay visuals
are available.
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| numMenuItems :: GettableStateVar Int |
| Contains the number of menu items in the current menu.
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| Produced by Haddock version 0.8 |