Path: utzoo!yunexus!ists!helios.physics.utoronto.ca!news-server.csri.toronto.edu!mailrus!uflorida!stat!sun13!fsu!prism!gt3070b
From: gt3070b@prism.gatech.EDU (Jeff Watkins)
Newsgroups: comp.lang.pascal
Subject: Units
Message-ID: <10012@hydra.gatech.EDU>
Date: 1 Jun 90 04:29:17 GMT
Article-I.D.: hydra.10012
References: <9918@hydra.gatech.EDU> <9919@hydra.gatech.EDU> <9920@hydra.gatech.EDU> <9922@hydra.gatech.EDU> <9923@hydra.gatech.EDU> <9924@hydra.gatech.EDU> <9925@hydra.gatech.EDU> <9927@hydra.gatech.EDU>
Organization: Georgia Institute of Technology
Lines: 30


So,
	Has anyone compiled those units that I posted a few days back?
I haven't heard anyone yelling that the code was perverse, uncommented and
generally incomplete.  
	There are a great number of things still missing from
the graphical units.  For example, windows may own scroll bars; but these 
scroll bars serve NO purpose.  The window may NOT be scrolled or repositioned
in any way.  Upon further consideration of this problem, I decided that the
only way I could provide scrolling panes was to reimplement TURBO's graphics
procedures.  This I did _NOT_ want to do and so have abandoned, albeit
temporarily, the idea of having scrollable windows.
	Another interesting bug is that when the mouse driver receives an
interrupt and redraws its cursor, TURBO may be in the process of updating the
screen.  A simple fix for this is to hide the cursor each time a graphic 
procedure is called.  Execution speed will slow to a crawl and the cursor will
be forever flashing.  The simple and obvious fix would be to mask off the 
mouse interrupt during a graphics command.  This is not easily achieved in
TURBO, especially if graphics commands are to appear to the user as
uncluttered by the environment.

Well, as always, I will entertain any suggestions/critism/flames (Currently I
can only offer tea and biscuits -- neither very good, I am afraid).

	-Jeff

Oh, what about the connections unit?  Did anyone compile/fix that?
-- 
Jeff Watkins  gt3070b@prism.gatech.edu
"All opinions are mine... so don't even think of keeping some to yourself!"