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hugs98-Nov2003/fptools/libraries/GLUT/Graphics/UI/GLUT.hs  view on Meta::CPAN

--   index windows.
--
-- * /Dials and button box:/ A sophisticated input device consisting of a pad
--   of buttons and an array of rotating dials, often used by computer-aided
--   design programs.
--
-- * /Display mode:/ A set of OpenGL frame buffer capabilities that can be
--   attributed to a window.
--
-- * /Idle:/ A state when no window system events are received for processing
--   as callbacks and the idle callback, if one is registered, is called.
--
-- * /Layer in use:/ Either the normal plane or overlay. This per-window state
--   determines what frame buffer layer OpenGL commands affect.
--
-- * /Menu entry:/ A menu item that the user can select to trigger the menu
--   callback for the menu entry\'s value.
--
-- * /Menu item:/ Either a menu entry or a sub-menu trigger.
--
-- * /Modifiers:/ The Shift, Ctrl, and Alt keys that can be held down
--   simultaneously with a key or mouse button being pressed or released.
--
-- * /Multisampling:/ A technique for hardware antialiasing generally available
--   only on expensive 3D graphics hardware. Each pixel is composed of a number
--   of samples (each containing color and depth information). The samples are
--   averaged to determine the displayed pixel color value. Multisampling is
--   supported as an extension to OpenGL.
--
-- * /Normal plane:/ The default frame buffer layer where GLUT window state
--   resides; as opposed to the /overlay/.
--
-- * /Overlay:/ A frame buffer layer that can be displayed preferentially to
--   the /normal plane/ and supports transparency to display through to the
--   /normal plane/. Overlays are useful for rubber-banding effects, text
--   annotation, and other operations, to avoid damaging the normal plane frame
--   buffer state. Overlays require hardware support not present on all systems.
--
-- * /Pop:/ The act of forcing a window to the top of the stacking order for
--   sibling windows.
--
-- * /Pop-up menu:/ A menu that can be set to appear when a specified mouse
--   button is pressed in a window. A pop-menu consists of multiple menu items.
--
-- * /Push:/ The act of forcing a window to the bottom of the stacking order
--   for sibling windows.
--
-- * /Reshape:/ The act of changing the size or shape of the window.
--
-- * /Spaceball:/ A sophisticated 3D input device that provides six degrees of
--   freedom, three axes of rotation and three axes of translation. It also
--   supports a number of buttons. The device is a hand-sized ball attached to
--   a base. By cupping the ball with one\'s hand and applying torsional or
--   directional force on the ball, rotations and translationsare generated.
--
-- * /Stereo:/ A frame buffer capability providing left and right color buffers
--   for creating stereoscopic renderings. Typically, the user wears LCD
--   shuttered goggles synchronized with the alternating display on the screen
--   of the left and right color buffers.
--
-- * /Sub-menu:/ A menu cascaded from some sub-menu trigger.
--
-- * /Sub-menu trigger:/ A menu item that the user can enter to cascade another
--   pop-up menu.
--
-- * /Subwindow:/ A type of window that is the child window of a top-level
--   window or other subwindow. The drawing and visible region of a subwindow
--   is limited by its parent window.
--
-- * /Tablet:/ A precise 2D input device. Like a mouse, 2D coordinates are
--   returned. The absolute position of the tablet \"puck\" on the tablet is
--   returned. Tablets also support a number of buttons.
--
-- * /Timer:/ A callback that can be scheduled to be called in a specified
--   interval of time.
--
-- * /Top-level window:/ A window that can be placed, moved, resized, etc.
--   independently from other top-level windows by the user. Subwindows may
--   reside within a top-level window.
--
-- * /Window:/ A rectangular area for OpenGL rendering.
--
-- * /Window display state:/ One of shown, hidden, or iconified. A shown window
--   is potentially visible on the screen (it may be obscured by other windows
--   and not actually visible). A hidden window will never be visible. An
--   iconified window is not visible but could be made visible in response to
--   some user action like clicking on the window\'s corresponding icon.
--
-- * /Window system:/ A broad notion that refers to both the mechanism and
--   policy of the window system. For example, in the X Window System both the
--   window manager and the X server are integral to what GLUT considers the
--   window system.