On 07-Oct-03, Kai Peters wrote:
> I am trying to write an app that monitors a given set of directories
> on the local drive at 5 min. intervals and then transfers any file
> it may find in one of these dirs to a ftp server, so it needs to
> basically loop forever.
> I want to have a Start/Stop toggle to initate or cancel this
> operation.
> How do I test for a 'cancel event' in my forever loop. Does someone
> have a little sample snippet that demonstrates Rebol's abilities for
> this purpose?
Hi Kai,
If you can use View, you could use it's window event handling. Here's
a little example...
rebol []
view layout [
across
label "Event Time"
event-time: info rate 5:00 feel [
engage: func [face action event][
if event/type = 'time [
; Event acted on here...
event-time/text: to-string now/time
show event-time
]
]
]
return
label "Rate Secs:"
field "300" [
event-time/rate: to-time to-integer face/text
]
return
button "Stop" [
event-time/rate: none
event-time/text: "Stopped"
show event-time
]
]
To see that working, enter 5 (for 5 seconds) in the "Rate Secs:"
field. An event should then happen every five seconds, which you can
stop with the Stop button and re-start again by entering another
number in the seconds' field.
See http://www.rebol.com/how-to/feel.html for more on View's event
handling.
I've not done anything similar in Core though, so others would be
better qualified to answer if it is a Core script you need.
--
Carl Read
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