ClassPackage: cgToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 8.1
Unrevised from 8.0 to 8.1.
8.0 version

widget-window

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.

A diagram of window and widget classes is shown in Widget and window classes in cgide.htm.


Copyright (c) 1998-2009, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 8.1. This page was not revised from the 8.0 page.
Created 2009.7.29.

ToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 8.1
Unrevised from 8.0 to 8.1.
8.0 version