| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
The class of all windows (excluding menus, which are not usually
regarded as windows). A basic-pane
instance by default
appears on the screen as a simple rectangular blank area with no
border or title-bar, but may have any of the standard window
attributes by specifying them explicitly when calling make-window.
Windows are Common Lisp streams, and so various standard stream functions may be applied to them. For example, stream output functions such as print and format will draw text on a window, and a window is closed by calling close on it. (See also user-close.) The device-open generic function may be extended with custom methods that do additional setup when a window is created. The function windowp will return true if its argument is a window and it is currently open.
This class is suitable to use as the superclass of custom application
window classes when it is desirable to start with the simplest type of
window, adding particular default attributes as needed. For windows
that have borders and title-bars, it may be simpler to instead
subclass frame-window
. If backing-store is
desired, instead use a bitmap-pane
or bitmap-window
. If controls are to
be added to the window, a dialog
is recommended.
A diagram of window and widget classes is shown in Widget and window classes in cgide.htm.
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 |