| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Arguments: outline-item
This outline-item
property allows an
outline-item to avoid displaying a leaf pixmap when a custom range-on-open method is
expected to supply child items for it later when it is opened.
has-range-on-open
returns nil
by default, but may be set to
true if needed by calling (setf has-range-on-open) or, more
typically, by passing the :has-range-on-open
initarg to make-instance when
creating an outline-item
.
An application should set this property to true if the item has no child items initially but a range-on-open method that the application has supplied for this outline is expected to return one or more child items for this item. If no custom range-on-open method is supplied for this outline, then there is no need to set the value of the has-range-on-open property.
An outline-item
will display its
outline-item-leaf-pixmap (rather
than its outline-item-opened-pixmap or its
outline-item-closed-pixmap) when it
currently has no child items (that is, its range is nil
) and when its has-range-on-open property is
nil
. Otherwise it will display its opened or
closed pixmap, depending on its current state (assuming that draw-icons is enabled for
the outline). The plus or minus pixmap is also displayed whenever the
leaf pixmap is not displayed (assuming that draw-plus-minus is enabled for the
outline).
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 |