ClassPackage: cgToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 8.1
Unrevised from 8.0 to 8.1.
8.0 version

screen

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) 1998-2009, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 8.1. This page was not revised from the 8.0 page.
Created 2009.7.29.

ToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 8.1
Unrevised from 8.0 to 8.1.
8.0 version