| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Arguments: button-widget
Changes which button on a dialog is invoked by pressing the ENTER key
(i.e. the default button). button must be an
instance of class button
already on a dialog (and it
is that dialog whose default button is changed). An error is signaled
if button is not on a dialog. The new default button will be drawn
with a thick black border.
If the specified button is already the acting default button of its
parent window, then nothing is done and nil
is returned. Otherwise the specified button becomes the acting
default button and a non-nil
value is
returned.
If a button of class default-button
exists on the
dialog, it will be the initial default button. This function is used
to change the default button dynamically.
Note: following Windows environment practice, if the user gives the keyboard focus to any push button (the keyboard focus is shown by a thin dotted line about the button), that button is invoked by pressing ENTER or the Space Bar. This is regardless of whether it is the default button or not. ENTER will again invoke the default button when the keyboard focus moves away from any button.
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 |