Help with Elisp for Timer
reddit / emacs

----------------------------------------------------------------------
Hercislife23 · 2022-10-19 00:58

I basically want to create a very basic elisp function that calls the
`org-timer-set-timer` to set a timer for 25 minutes, and then when
that finishes it starts a second timer that is for 5 minutes. The code
below is my attempt at a function to create a timer, but how do I have
it start the second timer when the first one finishes? Thank you for
the help!

`(defun start-timer ()`

  `(org-timer-set-timer "0:25:00"))`

----------------------------------------------------------------------
lj-read-it · 2022-10-19 01:41

Unless you're doing this specifically to practice Elisp, I think just
using the ```org-pomodoro``` package would be easier...

----------------------------------------------------------------------
globalcandyamnesia · 2022-10-19 01:54

There is a hook for when the timer reaches 0. You could use that to
start a new timer. You'd have to set a variable to make sure you don't
start an infinite loop.

----------------------------------------------------------------------
Hercislife23 · 2022-10-19 01:54

It is just to practice elisp, yeah.

----------------------------------------------------------------------
arthurno1 · 2022-10-19 14:54

> I basically want to create a very basic elisp function that calls
the org-timer-set-timer to set a timer for 25 minutes, and then when
that finishes it starts a second timer that is for 5 minutes.

Since you want to learn (practice) elisp as you say in the other
comment, I'll just outline a little:

You don't want here org-timer-set-timer. This is an interactive
function (a command) and is meant to be used with M-x so you can
choose a timer. If you gonna call it from lisp, use 'call-
interactively'. But you don't want to use that function at all here,
you are looking for 'run-at-time' or 'run-with-timer' alternatively
'with-timeout'. You should check the documentation for all of those in
[the manual](https://www.gnu.org/software/emacs/manual/html_node/elisp
/Timers.html). In the function you call in timer, you can set up an
idle-timer to run when the old one has finished. One way would be to
run an idle timer at certain interval and check if the other timer has
finished.