return-nil-from-pop-up-dialog

Arguments: widget new-value old-value

The default on-click function for a cancel-button.

This function simply calls flag-modal-completion with a value argument of nil, if the widget's parent dialog is currently being invoked in the current process by a call to pop-up-modal-dialog. Otherwise it does nothing.

Copyright (c) 1998-2015, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 10.0. This page was not revised from the 9.0 page.
Created 2015.5.21.