| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Like an editable-text
control, except that
the value may be any lisp object rather than a string only. When the
control's value is set programmatically to a new arbitrary lisp
object, the on-print event handler function for
the control takes the object as its argument and should return a
string to be displayed in the control. When the end user types into
the control, read-from-string is called
internally on the new string to produce a new arbitrary lisp object
that is then stored as the value of the control. Errors are trapped
during the reading so that no break will occur; if an error is
signaled during the reading then nil is stored as the value of the
control.
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 |