| From: | Neil Bothwick |
| Date: | 22 May 2000 at 22:15:36 |
| Subject: | Re: ArtEffect and loading pictures to start with... (fwd) |
Sam Thomas said,
> Hello Neil
>> waitforport is a DOS command, not an ARexx statement. You haven't given
>> an "address command" statement so waitforport does nothing and the
>> script immediately tries to load the picture, before ArtEffect is
>> loaded.
> Ok, I have got a bit nearer now! I assume that the 'waitforport' command
> waits until the ArtEffect Arexx port is open? yes?
> It seems to give up waiting (about 3secs before) for the port to open before
> ArtEffect has started up. Is there a way to make the command wait a bit
> longer? atm I have just repeated the line so that it finds it the second
> time around. (this works)
Waitforport waits until the port shows or ten seconds passes. The ten
seconds is hard coded, there's no way to extend it except by running the
command multiple times.
You could use something like
do i=1 to 6 until RC = 0;'waitforport portname';end
to wait until the port appears or a minute elapses.
> what do the other commands in the script mean then?
>> /* err, script to load a picture into ArtEffect on startup*/
Initial comment, required by ARexx.
>> parse arg pic
Get the name of the picture to load from the command line
>> address command
Set the external host to an AmigaDOS shell.
>> if ~show('P','ArtEffect') then do
>> 'Run >NIL: Programs:ArtEffect/ArtEffect'
>> do i=1 to 6 until RC = 0;'waitforport portname';end
>> end
If ArtEffect isn't already running, start it up and wait for its ARexx
port to appear.
>> address 'ArtEffect' 'loadpic' pic
Tell ArtEffect to load the picture.
>> if RC > 0 then address command '"RequestChoice >NIL: "ArtEffect.rexx" "Unable to load 'pic'" "Bollox!!!"'
Put up a warning requester is the load fails.
Neil
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