World: r3wp

In your example, you use the LAYOUT dialect, and you have to follow 
the rules of that dialect.


A dialect is a sequence of datatypes, that hold a certain meaning, 
because they're used in a certain context.

But try put the DO [..] block in, as I suggested, and tell us, if 
it works then.

@Geomol, when I run the script with the DO include, I get the following:

>> do %circular_series.r
** Script Error: btn has no value
** Where: forever
** Near: show-one: btn "Show answer" [
    one-position: ++ current-position 
    line: pick lines one-position 
    result/text:...

Eh, did you put the new DO block around all the content inside your 
LAYOUT block? I just suggested, you should put it around the first 
3 lines.

@Geomol, that dialect description is helpful. What context can I 
use a dialect, the VID in this case, and how do I know what data-types 
to use and what external things to the dialect to use(or not to use)?

To know, how to use the LAYOUT dialect, read the doc:
http://www.rebol.com/docs/view-guide.html

That's what we do.

@Geomol, oh ok. let me change that now.

@Geomol, I've looked at that doc. It doesn't specifically tell you 
anywhere what to do with the dialect when you want to introduce foriegn 
coding to the dialect.

Yes, it does. At:
http://www.rebol.com/docs/view-guide.html#section-44

I stand corrected. Maybe that didn't make sense to me at the time, 
or I skipped that part of the doc.

@Geomol, so why don't I put the DO[...] around code inside the btn 
blocks that are not like VID commands?

I mean to ask, why does it work?

my ultimate goal is to deal with circular lists. Using this doc, 
I can make one:http://www.rebol.net/cookbook/recipes/0017.html

but I want to be able to always go round around the list, go round 
around the file and also write to file the current location I am 
at.

Because those blocks are action facets described here:
http://www.rebol.com/docs/view-guide.html#section-17


When you interact with a style, in this case a button, those blocks 
are evaluated as if they were normal REBOL code, so the rules of 
the layout dialect doesn't rule there.

@Geomol, thanks for clearing that up

Doing a file access and then storing the state of your access, writing 
that to file, seems quite difficult to formulate in REBOL, for me 
anyways.

What I mean is that, if I read the file and end my read at a particular 
location before closing the GUI, does REBOL allow you to presist 
your state across executions of the program?

Things like INDEX? will tell you, where you are in a series. And 
you can easily save rebol code/values to disc using the SAVE function, 
and load them again with the LOAD function.

@Geomol, INDEX? will tell me its position, but the circular series 
link I sent you talks about how to always go around and around the 
series. I want to do the same with the lines of a file, but I'm not 
sure how to do it without using REPEAT

I don't want to use REPEAT because I only want to do it while I press 
the button

Pass! I'm not enough into your problem to point you into a direction. 
But go on and read some more of the docs, and you should be able 
to help yourself some more:

http://www.rebol.com/docs/core23/rebolcore.html
http://www.rebol.com/docs/dictionary.html

@Geomel, thanks. Also, is it allowed for me to use REBOL/Core when 
doing stuff in REBOL/View?

graphics related stuff is not possible in REBOL/Core.

R/View incorportes R/Core

@Henrik, @GrahamC, thanks.

Is there anyway to clear an info view after a button is pressed?

For example, if I press question button(displays the question in 
an info view), and then I press answer button(which displays the 
corresponding answer), when next I press question, I want the answer 
info view to go back to being blank. How can I do this? thanks.

The code in the next post demonstates most of the mechanics of what 
you are asking for:

question-database: [
    ["Doctor who?"  "Oops -- silence has fallen"]

    ["Is there a doctor in the house?" "Yes -- his name is Gregory"]
]



next-question: func [ ;; function to find and display the next question
   ][
   question-database: next question-database

   if tail? question-database [question-database: head question-database]
   question-field/text: first first question-database
     answer-field/text: ""
     show question-field
     show answer-field
    ]


   ;; code to define and run the panel
unview/all
view/new layout [
  across
  question-field: field ""
  answer-field: field ""
  return
  answer-button: button "show answer" [
               answer-field/text: second first question-database
               show answer-field
               ]
  next-button: button "Next question" [
                 next-question
                  ]
     ]

  ;; open code to start it running
next-question     
do-events

@Sunanda, thanks. Let me play with it to see where the info view 
reseting takes place.

try SET-FACE and CLEAR-FACE instead of setting and clearing face/text 
directly.

if you use:

source set-face

you can see what it does

@Henrik, thanks. will do.

@Henrik, do you mean 'help set-face' ?

yes, also that. I thought you would be interested in the source as 
well.

@Henrik, thanks.

the resetting happens at the places where you see ...
    xxxx/text: ""     ;; (changes the value in the field)
    show xxx       ;; (redisplays the field on screen)

@Sunanda, thanks again for pointing that out.

When I run this program via Crimson Editor it works perfectly:

ip: ["DC1" 10.75.48.14 "DC2" 10.75.48.11 ]

foreach [name address] ip [
	tmp: copy ""
	print join "Pinging " name

 print "***********************************************************"
	call/output reform ["ping " address " -n 2"] tmp
	print [head clear find/last tmp "Ping"]
]

When I run it via a shortcut (on Windows 7) it prints this:

Pinging DC1
*****************************************

and then it just hangs until I force it close.


Any ideas why running it via a shortcut would do this when running 
it via Crimson it works fine???

What's your shortcut command?

C:\Users\Ken\Dropbox\Rebol\rebol.exe -s C:\Users\Ken\Dropbox\Rebol\ping-servers.r

try using call/wait/output. Your above code should work though ...

When you use the /input, /output, /error, or /console refinements 
you automatically set the /wait refinement. -- according to the docs, 
but I will try it anyway :)

Tried it - it still hangs, bizarre!!

What's the command in Crimson Editor for running a file of that type?

C:\Users\Ken\Dropbox\Rebol\rebol.exe  -s "$(FilePath)" 
The intial directory is: $(FileDir)

I'm using REBOL 2.7.8.3.1

hmm, I tried call/output "start ping 10.10.10.10 -n 2" tmp: copy 
"", and R2 hangs too ....