QTIPS - Using INIT.VIEW with Printers [Revelation On-Line Wiki]

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====== QTIPS - Using INIT.VIEW with Printers=====

^Published By^Date^Version^Knowledge Level^Keywords^
|Sprezzatura Ltd|01 OCT 1990|1.16+|EXPERT|INIT.VIEW, @VIEW.MODE, PRINTER|

Al Blake at the World Conservation Monitoring Centre in Cambridge recently
asked - "how do I work INIT.VIEW with the printer?". This is a problem
infrequently seen so for the benefit of those who have not encountered
it..... If you make a call to INIT.VIEW and set @VIEW.MODE to 1, screen
output will be paged a la LIST command (REVMEDIA passim). If in the same
program you subsequently turn the printer on and print to it, corruption
occurs: the screen flashes the heading and a box is sent to the printer.

After initial experimentation involving setting @VIEW.MODE to 0, it was
eventually found that setting @VIEW.MODE to null ("") or TRANSFERing
@VIEW.MODE to a dummy variable (which accomplishes the same result) fixes
the problem.

<code>
   * Finish screen output
   @VIEW.MODE = ""
   PRINTER ON
   * etc
</code>

This is interesting as it implies that the person responsible for testing
@VIEW.MODE at RevTech is not using a boolean (IF @VIEW.MODE THEN) check, but
is using a length comparison (IF LEN(@VIEW.MODE) THEN).


(Volume 2, Issue 5, Page 7)