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From: utoddl@uncecs.edu (Todd M. Lewis)
Newsgroups: comp.sys.amiga.tech
Subject: Re: BUG in intuition (fix in 1.4? please?)
Summary: So what about the other side of the window?
Keywords: BUG Intuition Requesters Windows Clipping
Message-ID: <1989Dec15.193655.24789@uncecs.edu>
Date: 15 Dec 89 19:36:55 GMT
References: <1989Dec12.151514.17700@uncecs.edu> <8978@cbmvax.commodore.com>
Organization: UNC Educational Computing Service
Lines: 57


In article <8978@cbmvax.commodore.com>, peter@cbmvax.commodore.com (Peter Cherna) writes:
> In article <1989Dec12.151514.17700@uncecs.edu> utoddl@uncecs.edu (Todd M. Lewis) writes:
> >
> >A friend of mine came across this bug in Intuition.  It seems
> >that Intuition incorrectly clips requesters in windows.  To see
> >the problem, try to open a requester that covers the interior
> >of the window right up to the borders.  You can't.  Assuming
> >normal screen colors (blue backgrounds, white borders) you'll
> >get a 1-pixel blue line next to the right border and along
> >the bottom border that you can't cover with a requester.
> 
> Intuition's Window borders are actually double-borders:  There is
> an outside border rendered in the window's BlockPen (which normally
> is pen 1, but can be whatever the opener of the window likes), and that
> is the part everyone is aware of.  Just inside that is an "inner border"
> rendered in pen 0.  This inner border is apparent in any window that
> is not of type BORDERLESS, so indeed your requester does cover the
> window upto the borders.
> 
> The discussion of borders is on p. 56 of the Intuition Reference Manual
> in the Windows chapter.  Both the inner and outer borders are mentioned,
> although the manual incorrectly states that the inner border is rendered
> in the DetailPen of the window, while in truth it is always rendered
> in pen 0.  (They're usually, but not always, the same).
> 
> >  Just thought you'd like to know.
> 
> We always like to know, even if it turns out there's no bug.

Except there is a bug!  If what you say above is true (and I have
no reason to doubt you -- your explanation fits my observations)
then the same phenomenon should occur on the left and top edges
of a window.  That is to say, if Intuition is going to clip a 
requester at the right and bottom window border (as it does) then
we should also be seeing the Thin Blue Line next to the left
border.  Since the title bar and associated gadgets are within
the window I would expect that a requester could be placed next
to it, but if it overlapped the title bar it would be clipped
to the third scan line from the top (one for the white border line
and one for the inner border.  Alas this is not the case.  Seems
to me that if I get clipped on two sides, I should get clipped
on the other two.

Still think you'd like to know :-)

(Maybe this is not a bug.  I guess if it works as designed then it
is not, technically, a bug.  Perhaps it's that the design is,
ummm, interesting.)  

I hope this doesn't come across as a flame or a rant.  This problem
is only a minor knit, and I am increasingly impressed with
Intuition as I find out more about it.  I don't mean to sound
proud, except in having had the good sense to buy an Amiga in
Nov. '85.

-- Todd M. Lewis