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Writing to the IDLde [message #52549]

Tue, 13 February 2007 12:07

news.verizon.net
Messages: 47
Registered: August 2003

Member

This message will reveal me as a dinosaur, but I am still trying to
maintain programs that display output to a terminal, continuously
overwriting the previous result. For example, the following
little program will continously display the number of seconds since
the program started:

pro test, x
cr = string(13b)
for i=0,50 do begin
wait,1
print,i,cr,f='($,a,a)'
endfor
end

However, this program only works at a Unix terminal: in the IDLDE (Mac
or Unix), the carriage return can't erase the previous text.
Perhaps, there is some combination of carriage return, linefeed and/or
newline suppression format that works with the IDLde but I couldn't
locate it.

Of course,I could write the output to a text widget, and update/
overwrite using WIDGET_CONTROL as needed. But this would require
fairly major changes ot existing code.

A possibly related question is whether it is possible to display text
to the IDLde using the /MORE option. At a terminal, one can use
openw,lun,filepath(/terminal),/more,/get_lun . I had always assumed
that this wasn't possible to do this in the IDLde, but compiling with
the -t option does give /MORE output.

Thanks, --Wayne

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[Message index]

		Writing to the IDLde By: news.verizon.net on Tue, 13 February 2007 12:07
		Re: Writing to the IDLde By: KRDean on Wed, 14 February 2007 10:58
		Re: Writing to the IDLde By: David Fanning on Wed, 14 February 2007 09:04
		Re: Writing to the IDLde By: wlandsman@jhu.edu on Wed, 14 February 2007 08:58
		Re: Writing to the IDLde By: Ben Panter on Wed, 14 February 2007 08:02

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