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From: Lawson.English@p88.f15.n300.z1.fidonet.org (Lawson English)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Can the Mac actually do animation?
Message-ID: <6968.27FFFA69@stjhmc.fidonet.org>
Date: 8 Apr 91 04:42:41 GMT
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Al Evans writes in a message to All

AE>  Naturally, the procedure gets a bit more elaborate if animated 
AE> images can overlap, but the approach remains the same.  --Al 
AE> Evans-

Hi. I'm trying to scroll using the TCL's whilest doing something like the 
above
(I'm dragging using a region outline instead of a bitmapped image, but the 
principle
seems to be the same). My problem is that when I scroll, the image gets messed
 
up... Should I abandon the PaintRgn call and just use CopyBits, or is there
a fundamental problem that I haven't addressed? (I'm basing my dragging method
 
on the example given in Macintosh Programming Primer II but dragging ICON 
outlines
instead of Rects). The method works when I use the example but if I "buffer"
the Regions before drawing, the scrolling part looks disasterous (bits of the
region never get erased when the Panorama scrolls). I'd really like to use the
 
buffering technique as the flicker-free dragging looks real professional...


Thanks...


Lawson
 

 

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