| Allegro CL version 7.0 Moderately revised from 6.2. | |||||||||
The class of all windows that implement dialog-items (also known as
widgets or controls). The subclasses of this class are os-widget-window (for widgets that
are provided by the underlying window system or operating system) and
lisp-widget-window (for
widgets that are implemented from scratch within Lisp). This class is
not instantiable.
To create a widget, an application calls make-instance on a dialog-item class. When the dialog-item is
added to a parent window (with add-component or with the
:dialog-items argument to make-window), then an instance of the associated
widget-window class is
automatically created to implement the visible window of the
widget. Calling the function window on the dialog-item will then return
its associated widget-window. A widget-device method tells the dialog-item class which widget-window class to instantiate.
In releases prior to 7.0, the symbol widget-window
named the class which is now called os-widget-window.
Copyright (c) 1998-2006, Franz Inc. Oakland, CA., USA. All rights reserved.
This page has had moderate revisions compared to the 6.2 page.
Created 2005.9.20.
| Allegro CL version 7.0 Moderately revised from 6.2. | |||||||||