Bob,

It will be much more straightforward in the forthcoming Squeak 2.3 release to create "etoy-like" things than it has been in 2.2.  I advise waiting a couple of weeks.

However, if you wish to push forward on this in the meantime, a good place to look is in the "ReadMe.text" file shipped with Squeak 2.2; the relevant section starts with the heading "Programming in Morphic".  Or, more conveniently, you can point a web browser directly at:

  http://minnow.cc.gatech.edu/SqueakDoc.11

Finally, if none of the above satisfies your immediate need, here are a few steps that will get you on the road to reconstructing Alan's "race car" demo in the current release:

*  Start out in a fresh Morphic Construction Project.

*  From the "Scripting" submenu of the world menu, get a "detachable scripting space".

*  Drag out a blank playfield (pale green rect) from the parts bin and deposit it in the scripting space.  This will be the place where you draw your car and where it will travel around.

*  Paint your car by dragging a "paint palette" from the parts bin and dropping it into Playfield, then painting the car, then hitting "Keep".  (It's also possible to script a "Paint" tab of the palette so that it invokes painting automatically whenever it's hit, as in Alan's etoy demo, but drag-n-drop of the palette icon should do to get you started.)

*  Obtain a "Viewer" for the car by dragging from its cyan-colored halo handle; place the viewer where you wish.  (It is also possible to have viewers all show up at a single, reusable place, as in Alan's etoy demo, but it's rather strenuous right now to set this up.  In 2.3 Squeak this will be *much* easier.)

*  Rename the car from "Sketch" to "Car" by clicking on its name at the top of the Viewer (the name-editing area will turn yellow), backspacing to get rid of the unwanted text, typing "Car", and then hitting ENTER.

*  Get a nascent script for the car by dragging from the phrase in the Viewer that reads "Car turn by 5" and dropping somewhere into your scripting space.

*  Now proceed to modify and test your script, by adding new phrases, changing parameters, etc.

*  Later on, paint your steering wheel, bring up its viewer, and drag tiles from the relevant places in that viewer, dropping them atop the appropriate places in your script, to achieve the effect you want.   

For example, if you want the amount by which the car turns to be determined  by the heading of the steering wheel, get a tile for "steeringWheel's heading" anddrop it over the "5" parameter in the "car turn by 5" phrase of the car's script.

Hope this helps,

   -- Scott

--------------------------------------------------------------

At 11:32 AM -0800 11/4/98, Houston, Bob wrote:
>I had the opportunity to see Alan do his etoy demo last week.  Wow!  This
>stuff is really cool!!
>
>The etoy authoring tools and scripting environment have come a long way in
>the past few months.  I'd really like to play around with this stuff, but I
>seem to be missing something.  I remember playing with the authoring
>tools/scripting support in a previous release of squeak, but I can't seem to
>get it to work in the version 2.2.  I'm sure it's just pilot error on my
>part. ;-)
>
>Could someone send me a pointer to get me going?  If this info is available
>on the SqueakDoc site please send me the page number.  Here's what I' trying
>to do:
>
>I'd like to re-create the "race car" demo, where you draw two sketch morphs
>(a race car and a steering wheel) and "wire" them together so that rotating
>the steering wheel causes the car to be driven around the screen.  Pretty
>simple, right?  Question: How exactly do I invoke the authoring tools and
>connect the two morphs in this way?  
>
>Thanks in advance,
> 
>Bob Houston, Tech Rep              bobh at rational.com
><mailto:bobh at rational.com> 
>Rational Software Corporation      703 761-4466
>8000 Westpark Drive, Fifth Floor
>McLean, VA 22102  USA