karl wrote:
> Here is a little more info:
> The comment below is from a change set that was added to Squeak 2.9a. 
> You may have to load a Squeak version from that timeframe for it to work 
> as expected.

As a word of advice: Don't even go near that place in recent Squeak 
versions. This code was always extremely experimental and hasn't been 
touched in years (7+ if I'm counting correctly). If you're serious about 
creating a whole new UI (instead of just dabbling for an hour or two to 
see what can be done) you'll be better off starting from scratch than 
trying to retrofit that code.

Cheers,
   - Andreas

> 
> 3006newZoomAndScroll-raa -- Bob Arning -- 20 November 2000
> newZoomAndScroll
> fifth version:
> - preset Alan's preferred scale factors for pan and zoom
> - try to keep center of image centered as we zoom
> fourth version:
> - an effort is made to keep the view full of content
> - two sliders are added to experiment with scale factors for pan/tilt 
> and zoom
> - we were already doing this: Also, looking ahead into the future a 
> little, each page in the bookmorph will have its own zoom, pan and tilt 
> settings ....
> third version:
> - do not rely on continuous mouse moves
> - adjust things dropped into inner pasteup so that none extend over left 
> or top edge
> second version:
> - added scripting commands to StoryboardBookMorph for getting and 
> setting scale, offsetX and offsetY (of the current page).
> first version:
> - made contents of the zoomer a true playfield in a transformation so 
> multiple morphs are possible
> -----
> third version:
> - zooming/scrolling controls now in a separate area below the page
> - Balloon interpolating mode now the default
> second version:
> - ZoomAndScrollMorph becomes a PasteUpMorph so it can be in a book
> - StoryboardBookMorph is a book that uses ZoomAndScrollMorph as its pages
> zooming and scolling for Alan
> - get a ZoomAndScrollMorph from the new morph/demo menu
> - drop any morph in it
> - drag mouse horizontally to pan
> - drag mouse vertically to zoom
> - shift-drag vertically to move up/down
> - change the instance variable <usingBalloon> to true to use Balloon"
> 
> 
> 
>