RE: Text Monitor Widget

["Singleton, Steve (DLSLtd,RAL,DIA)" <steve.singleton@diamond.ac.uk>]

At Diamond we have a requirement for a text monitor/update widget that
handles strings of more than 40 characters, spread over several lines.
To provide this I implemented a multi-line text update widget that takes
its input from a text string in a waveform record instead of a stringin
or stringout.  Long lines are split at spaces, and "\n" characters are
handled correctly.  This widget can be found in the standard EDM
distribution, in the diamondlib directory.  I hope it is of use to you.

Regards
Steve Singleton   

-----Original Message-----
From: tech-talk-bounces@aps.anl.gov
[mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Szalata, Zenon M.
Sent: 02 August 2009 06:05
To: tech-talk@aps.anl.gov
Subject: EDM: Text Monitor Widget

I have an ASCII coded string which contains new line characters.
Effectively, the null terminated string contains a small number of
"lines".  This string is formatted in genSub record and the output field
in which the string is held is of type "CHAR" and of length n
characters, long enough to hold the string.

When I display this string in an EDM Text Monitor widget, the new line
characters are displayed as (0A) and the text that follows is not
displayed on next line.  I was hoping that the new line character
imbedded in a string would have the expected behavior.  In fact, Text
Monitor, Text Update, and Text Control, all do the same thing with the
new line character.

Is there a way in EDM to display such a string effectively as printf
would?

I know that I could break up the string into separate lines of text, one
per EPICS record, but that would end up with a lot of extra record and
much extra work.  Besides, it would be difficult to handle a variable
number of lines of text...

Thanks in advance,
Zen

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