image-list-open-p

Arguments: image-list

This function returns true if and only if the argument image-list is currently open. Currently Common Graphics uses image-lists only for list-view controls, which automatically open their image-lists when needed, so this function is not likely to be needed by applications.

Note that if a list-view control that does not have the share-image-lists property turned on is removed from its dialog or the dialog is closed, then the operating system will destroy any image lists that were used by the list-view control. An application can call image-list-open-p to determine whether this has happened. On the other hand, close-image-list is not called when the OS destroys an image-list, and so an application cannot check for this occurrence by wrapping close-image-list, and should call image-list-open-p instead.

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.