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| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version

## on-timer

Arguments: timer

This function returns the value of the on-timer event property of the argument timer. The value should be a function object or a function name (a symbol naming a function). The function is invoked after timer's interval has elapsed (assuming that the default timer method has not been overridden). The function should take a single argument, which is the timer itself. Its returned values are not used. The default value is `nil`, and so a timer will not do anything when its interval has elapsed unless it is given a custom on-timer function (or a timer method is added for it).

An on-timer function can be specified with the `:on-timer` initarg when creating a `timer` instance with make-instance and setf can be used with on-timer to set or change the on-timer function of a timer.

See cg-timers.htm for more information on timers. See cg-events.htm for information about event handling in Common Graphics.

Copyright (c) 1998-2022, Franz Inc. Lafayette, CA., USA. All rights reserved.
This page was not revised from the 10.0 page.
Created 2019.8.20.

|  | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version