Manipulate callback functions.
callback [subcommand] [-option value...]
Set or remove callback functions.
- callback create [script] [-option value...]
- Create a callback function and returns its ID. The function is called until it returns another code than ok (e.g. return -code break) or until it is deleted with the delete subcommand.
-interval integer or "idle" (default: idle)
If interval is an integer, script is called every interval milliseconds. If its "idle" script is called whenever there are no other events pending.
-priority integer (default: 0)
Priority with which this callback is handled. Negativ values mean lower priority than normal, positiv values mean higher priority than normal.
- callback delete [ID]
- Deletes the callback function with the ID ID.