effective-background-color

Arguments: object

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 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) 1998-2001, Franz Inc. Berkeley, CA., USA. All rights reserved.
Documentation for Allegro CL version 6.1 update # 1. This page was not revised.
Created 2001.12.15.