[plt-dev] Scrolling of files with large snips

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Thu Nov 12 18:07:51 EST 2009

This is fixable with the current tools. It is, I believe, easy to say
make scroll positions every 15 pixels (or some other fixed number).
Less easy to make them at the height of the font generally in the
buffer, tho. (Matthew: any hints?)


On Thu, Nov 12, 2009 at 5:02 PM, John Clements
<clements at brinckerhoff.org> wrote:
> It looks like DrScheme buffers manage scroll positions using the
> line-at-the-top-of-the-screen.  This means that for large snips--those
> taller than the window--there's no way to see the bottom half of the snip,
> because there's no intermediate scroll position between
> line-with-the-big-snip and (+ 1 line-with-the-big-snip).
> E.G.:  Evaluate this program:
> (require 2htdp/image)
> (circle 500 "solid" "yellow")
> On the Mac, for screens less than 1000 pixels tall, there appears to be no
> way to inspect the bottom part of the circle.
> IIUC, this is not a bug but a change request.
> I guess the best question might be this:  is this the kind of thing that
> might be fixed by the re-implementation of wx in scheme, or not?
> John
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