[lively-kernel] Waving the red flag

Philip Weaver philmaker at gmail.com
Fri Apr 16 01:37:40 CEST 2010

There's talk lately of presentations and zooming in LK. Came across this
about a year ago. Implemented in flash I think. Just some fodder of prior
art for review:


On Sun, Apr 11, 2010 at 2:46 PM, Dan Ingalls <danhhingalls at gmail.com> wrote:

> Regarding zooming UI's, in addition to Negroponte's early work that Alan
> mentioned, you might be interested in this paper:
> Generalized and stationary scrolling, ACM SIGCHI 1999
> Authors: * Randall B. Smith*,* Antero Taivalsaari*
> We present a generalized definition of scrolling that unifies a wide range
> of existing interaction techniques, from conventional scrolling through pan
> and zoom systems and fish-eye views. Furthermore it suggests a useful class
> of new scrolling techniques in which objects do not move across the display.
> These "stationary scrolling" techniques do not exhibit either of two
> problems that plague spatial scrolling system: discontinuity in salience and
> the undermining of the user's spatial memory.
> We should notice that Antero was a co-author with Randy.  In fact one of
> the first experiments Antero did in the Lively project was to play around
> with zooming worlds instead of our Squeak Project-like wormholes.  I thought
> we even had some code from this in our repository, but I don't see it.  [I
> see that we lost Antero's Sun address from the mail list, so I'll CC him]
> I just tried inspecting the world and evaluating this.scaleBy(1.1) but i
> see we currently don't use the world's transform (tsk, tsk).
>         - Dan
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