Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cwjcc!gatech!ncsuvx!ecemwl!jnh
From: jnh@ecemwl.ncsu.edu (Joseph N. Hall)
Newsgroups: comp.sys.mac.programmer
Subject: More Silly Behavior from THINK's Class Library
Message-ID: <3874@ncsuvx.ncsu.edu>
Date: 6 Sep 89 11:27:55 GMT
Sender: news@ncsuvx.ncsu.edu
Reply-To: jnh@ecemwl.UUCP (Joseph N. Hall)
Organization: North Carolina State University
Lines: 31

Ever tried printing a pane with subpanes that needed to be informed that
printing was about to commence?

It turns out that ONLY your document's "main pane" receives the 
AboutToPrint(), PrintPage(), and DonePrinting() messages.  I think this is
totally incorrect behavior.  Your main pane AND ALL ITS SUBPANES should
receive these messages during printing.  After all, the main pane AND its
subpanes (subviews) are ALL printed, since they output to the printer
port through DrawAll().

I have a class, for example, that relies on subpanes for printing headers
and footers, which remain invisible until printing commences.  At print-
time, I have to 1) make them visible, and 2) expand their frames to meet
the page borders.

Currently, the header and footer pane classes override AboutToPrint() etc.,
which I call explicitly from my main editing pane's AboutToPrint() etc.
methods.  But I think the best approach, by far, would be to revise
CDocument (or whatever, I forget) to send these messages recursively
to all of the main pane's subviews.

I'm currently treating the Class Library as read-only, since I want to be
able to distribute sources of my own as easily as possible.  I hope that
some of the minor glitches (like this) will be dealt with in future releases
so that I'm not tempted to deal with them myself ...


v   v sssss|| joseph hall                      || 4116 Brewster Drive
 v v s   s || jnh@ecemwl.ncsu.edu (Internet)   || Raleigh, NC  27606
  v   sss  || SP Software/CAD Tool Developer, Mac Hacker and Keyboardist
-----------|| Disclaimer: NCSU may not share my views, but is welcome to.