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From: pittenger-laurence@cs.yale.edu (Laurence Arthur Pittenger)
Newsgroups: comp.sys.mac.programmer
Subject: HELP! mystifying QuickDraw-related bug...
Summary: cGrafPort isn't working, but why?
Keywords: QuickDraw FrameRect DragGrayRgn
Message-ID: <28646@cs.yale.edu>
Date: 10 Feb 91 05:39:27 GMT
Sender: news@cs.yale.edu
Organization: Yale University Computer Science Dept., New Haven, CT 06520-2158
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Originator: pitteng@hare.CS.Yale.Edu

To All --

  Ok all you wizards -- here's a nasty.

  I'm writing a program which handles a bunch of cGrafPorts.  In a
sense, they "inherit" characteristics from each other, so when they're
set up I copy the pertinant fields into the new one.

  Now, usually these cGrafPorts work just fine, but on 2 commands now,
FrameRect() and DragGrayRgn(), the program >BOMBS<.  My guess is that
the cGrafPort is not set up correctly, because I know the parameters
to the call are correct and the only other info these calls uses is, I
assume, the current port -- ie my cGrafPort.

  The obvious solution is that the cGrafPort's pen is not set up
correctly.  This, however, is not the case.  Likewise the foreground
and background colours.

  I have no idea what else might be the problem, and I'm kinda stuck
until I can figure this out.  Thus...

                      HEEEEEELLLLLLLLP!


  Apropos of all this, is there a book out there which details the
ToolBox commands, telling things such as what info each commans
uses/changes.  Such a book would sure help me now, 'cause it would
list everything that could be the problem.

Thanks in advance,
LP

-- 

Laurence A. Pittenger
CSNET  : pittenger-laurence@cs.yale.edu
BITNET : pitlaua@yalevm ,  pittenger-laurence@yalecs