| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Arguments: button-widget
Sets the value of a boolean widget to t
if
its current value is nil
, and otherwise sets
its value to nil
. The boolean widgets (ones
that have only two logically distinct values) include button
, default-button
,
cancel-button
,
picture-button
, check-box
, and radio-button
.
This function emulates clicking on a boolean widget, and is handy for triggering the on-change function of a simple button widget. (Note that while a simple button widget has only a single visible state, it still holds a boolean value that causes the on-change function to run when it is changed.)
Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.1 page.
Created 2010.1.21.
| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |