FunctionPackage: cgToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 8.2
Unrevised from 8.1 to 8.2.
8.1 version

effective-background-color

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) 1998-2012, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 8.2. This page was not revised from the 8.1 page.
Created 2010.1.21.

ToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 8.2
Unrevised from 8.1 to 8.2.
8.1 version