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From: rfr@cs.cmu.edu (Rick Rashid)
Newsgroups: comp.sys.next
Subject: Re: Postscript Previewing?
Message-ID: <oXvpaAy00jdX0xKkUm@cs.cmu.edu>
Date: 7 Feb 89 21:03:08 GMT
References: <16435@iuvax.cs.indiana.edu> <1485@mace.cc.purdue.edu>,
	<3060@haven.umd.edu>
Distribution: usa
Organization: Carnegie Mellon, Pittsburgh, PA
Lines: 22
In-Reply-To: <3060@haven.umd.edu>

There is a very simple fix to Yap which, although it is not a perfect
solution, allows you to preview multipage documents.

In the sources to Yap (/bootdisk/Programming/Examples/yap/*)
you will find a file called 'controller.pswm'.  In the method
'- executeRequest:(id)sender' there is a line which looks like this:

        "/showpage {} def  /yaptime usertime def \n",

You should change that line to be:

        "/showpage {{buttondown {erasepage exit} if} loop} def /yaptime usertime
def\n",


This will cause the previewer to pause waiting for a mouse click each time
it finishes a page.  Each time you click it will clear the window and
then process the postscript description of the next page.  This hack has
the problem that it erases the entire window (including the border) but
I am very unfamiliar with postscript and this is the best I could do as a
quick hack.  Perhaps someone with real postscript expertise could suggest
the correct thing to do rather than use erasepage.