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
intitarg 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 About the Common Graphics timer facility in cgide.htm. See also About event handling in the IDE in that document.
Common Graphics and IDE documentation is described in About Common Graphics and IDE documentation in cgide.htm.
The documentation is described in introduction.htm and the index is in index.htm.
Copyright (c) 1998-2000, Franz Inc. Berkeley, CA., USA. All rights reserved.
Created 2000.10.5.