[plt-dev] Scrolling of files with large snips

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Thu Nov 12 18:08:19 EST 2009

Oh, I know how to do it. Nevermind. (get the style list's standard
style and get its font's height)


On Thu, Nov 12, 2009 at 5:07 PM, Robby Findler
<robby at eecs.northwestern.edu> wrote:
> 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?)
> Robby
> 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
>> _________________________________________________
>>  For list-related administrative tasks:
>>  http://list.cs.brown.edu/mailman/listinfo/plt-dev

Posted on the dev mailing list.