| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
The class of screen objects. There is only a single screen instance, which is automatically created when Common Graphics is initialized with initialize-cg. (A possible future enhancement would support multiple monitors, each of which would have its own screen.)
The screen object is returned by the expression (screen
*system*)
(see screen and *system*
). This object will be returned by
parent when called on a
top-level window, and by owner
when called on a non-owned top-level window.
Drawing may be done on the screen as it is done on a window, though the drawing code must be wrapped in a with-device-context form. Care should be taken not to draw on other applications, which this allows.
This class was named windows-screen-device in releases prior to 7.0.
Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.1 page.
Created 2010.1.21.
| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |