Generic FunctionPackage: cgToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 10.0
Unrevised from 9.0 to 10.0.
9.0 version

screenp

Arguments: object

Returns true if object is an instance of the screen class, and returns nil otherwise. This may be useful for determining whether the owner or parent of a window is the screen rather than a window, for example.

Currently there is only a single screen object, but a possible future enhancement would be the support of multiple monitors, where there is a screen object for each monitor. In that situation, calling screenp would be preferable to an expression such as (eq my-stream (screen *system*)) (see screen and *system*).

See also windowp.


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This page was not revised from the 9.0 page.
Created 2015.5.21.

ToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 10.0
Unrevised from 9.0 to 10.0.
9.0 version