9.4 DUIM-Frames Module
<frame-unmapped-event>
Sealed instantiable class
Summary
The class of events that indicate a frame has been unmapped.
Superclasses
Init-keywords
- None.
Library
duim-frames
Module
duim-frames
Description
The class of events that indicate a frame has been unmapped, that is, removed from the screen. An instance of this class is distributed whenever a frame is unmapped. A frame may be unmapped by either iconifying it, or by exiting or destroying the frame completely, so that it no longer exists.
Operations
- None.
Example
The following example defines a method that can inform you when an instance of a class of frame you have defined is unmapped.
define method handle-event (frame :: <my-frame>, event :: <frame-unmapped-event>) => () notify-user (format-to-string("Frame %= unmapped", frame)) end method handle-event;