timeout: Control a periodic/timer function
In RGtk2: R Bindings for Gtk 2.8.0 and Above

Description Usage Arguments Value Note Author(s) See Also

DEPRECATED!! (compatibility wrappers for RGtk 1!)

These functions allow one to register and remove a function that is called periodically at a fixed interval.

1 2	gtkAddTimeout(interval, f, data=NULL) gtkRemoveTimeout(id)

`interval`	the number of milliseconds to wait before invoking the call.
`f`	the function should take one or zero arguments depending on whether the argument `data` is given. The function should return a logical value. If it returns `FALSE`, the timer is removed. If it returns `TRUE`, the timer is re-registered and will be called after `interval` milliseconds.
`data`	a value, which if specified, will be passed to the function `f` when it is invoked. This can be used to parameterize the function to have different functions. The same effect can be obtained using closures.
`id`	the object identifying the timer function in Gtk that was returned by a call to `gtkAddTimeout`.

gtkAddTimeout returns an object of class "GtkTimeoutId". This is an integer giving the identifier returned by the low-level Gtk interface.

THIS STUFF IS VERY OLD AND DEPRECATED (compatibility wrappers for RGtk 1)

This does not currently work when running directly in R. However, when running R inside another application such as GGobi, Gnumeric, etc. it and other event-loop facilities will work.

If one wanted to reset the timeout but with a different interval, one should register a new timeout within the function and return FALSE.

Duncan Temple Lang <duncan@research.bell-labs.com>

gtkAddIdle gtkRemoveIdle gtkAddCallback

RGtk2 documentation built on Oct. 14, 2021, 5:08 p.m.