| Allegro CL version 9.0 Unrevised from 8.2 to 9.0. 8.2 version |
Arguments: object &key base-color scratch-rgb
Returns the color returned by background-color for object if that
function returns a color (rather than t
or
nil
).
The value will be an RGB color (as returned by make-rgb). See hls-to-rgb and rgb-to-hls.
If the scratch-rgb argument is specified, it should be a RGB object which will be modified to be the effective background color. This avoids consing a new RGB object.
The base-color argument is used internally and should not be specified by applications.
If background-color returns nil
, effective-background-color returns
the color returned by default-background-color for
object. (As of 5.0, background-color returns nil
when no background color has been explicitly
assigned to an object.)
If background-color returns t for a control, indicating that the control's background color should be the same as its parent window's background color, then the effective-background-color of the parent window is returned.
Copyright (c) 1998-2019, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.2 page.
Created 2012.5.30.
| Allegro CL version 9.0 Unrevised from 8.2 to 9.0. 8.2 version |