[Squeakland] Release Notes for Etoys download - Sept 2008
kim.rose at vpri.org
Thu Sep 11 11:30:13 PDT 2008
Release Notes - Etoys -September 2008
These notes accompany the download of Etoys available via
www.squeakland.org as of September 11, 2008. In the past, the
system has often been referred to as "Squeak", but to help
distinguish it from other versions of Squeak, we will refer to the
version now available on the website simply as "Etoys."
The team at Viewpoints Research Institute (VPRI) has been working on
the "Etoys" activity for the OLPC (One Laptop per Child) "XO"
platform. We started from the previous version of "Squeakland
Squeak", then added new features and made many bug fixes, performance
improvements, and visual tweaks.
VPRI has decided to release the Etoys activity for the XO as the
"universal" Etoys version for all platforms. Advantages include:
1) Two years of work have gone into improving Etoys overall;
2) Etoys will be identical on the XO, Windows, Macintosh and Linux
3) The new features, enhancements, and fixes will be beneficial to
In this way, all users of the XO and other platforms will be
"compatible" and be able to share their projects and documentation.
Below is a list of "New Features", "New UI Changes", and "Notes on
There are now over a dozen mathematical functions available for
use in arithmetic expressions in scripts, in addition to the
operators. (Click on the golden treasure box of a script
out an "abs" tile, drop it on any numeric-valued tile or phrase
script, and then (unless you actually want "abs") choose the actual
function name you desire from the menu that shows up when you
it. There is also a choice called "parenthesis", which serves
to put a
subexpression within parentheses, in order to influence order of
(There is also a way to "wrap" an existing numeric tile
expression in a
function, by holding down the "shift" key as you click on an
arrow" -- this will make the expression governed by the
become the argument of a function call.)
-- Arithmetic Operator Precedence.
The arithmetic operators (+ - * / // \\ and min and max) now have
more conventional precedence; i.e., multiplication and
division are now "stronger" than addition and
subtraction. (See below under "Notes on Compatibility" for more
-- "RepeatTimes" tile.
A tile to write a simple loop is provided.
-- Display Scaling.
We think it useful to offer a "standard", normalized screen size
on non-XO platforms, so that a project made on one computer can
consistent appearance across a broad range of computers with
sizes and screen resolutions. Because the XO has a screen with
1200 x 900
pixels, this was chosen as the "standard" size. On a computer
different display resolution, 1200 x 900 pixels are scaled to
fit in the
display. If the actual display size is vastly different from
1200 x 900, the
scaling may not look very nice; in such cases, scaling can be
turned off from the menu bar.
-- The Online Help System ("Quick Guides")
There are now over 60 help guides included in the system.
Click on the
question mark button in the menu bar to see them. They can also be
printed as a single PDF file found on the Squeakland and Etoys/
-- Polygon Vertices.
In a Polygon, the vertices are accessible from tile scripting.
Visit the polygon category in the viewer of a Polygon.
-- World Stethoscope.
World Stethoscope, a tool to use the input from external sensor
-- Event Theatre.
A tool that provides a better way to record and play back a
user's actions. This can be used to create small snippets of
voice-over can be added later, and there is also an "Event-Roll"
tool for modest
after-the-fact editing of such recordings.
-- A New Generation of the Particle System (aka "Kedama").
Kedama has been entirely rewritten for this release. The new
version is faster
in most cases, and there are semantic changes as well -- see
more details in the
compatibility section below.)
-- All Players Tool.
The tools labeled "Players" in the Supplies provides a list of
in the current project.
-- Book Page Reverting.
Book pages can be made revertable. Book pages can be marked as
revertable, and such pages can be reverted to the state when the
book was last saved into a project.
-- More Sound Compression Options.
In the Sound Recorder, there are choices for Sound Compression.
"New UI Changes"
-- Bigger and More Consistent Fonts and Buttons.
In general, the tools have been redesigned for screens with a
resolution. Larger fonts are used, and buttons in viewers,
scriptors, and other
tools have now been made more uniform.
-- Stationary Navigator Menu Bar at the Top.
Instead of having an orange pop-in/pop-out navigator bar at the
bottom of the
screen, the navigator bar is now located at the top of screen,
and is stationary.
Type alt-RETURN at any time to show or hide it. The new
Navigator follows the
design of the OLPC's UI specification, but we took the liberty
to make it narrow,
and change its color.
-- New Supplies.
Click on the "treasure box" in the navigator menu bar at the top
of the screen to
open or close the new "Supplies" flap. You can resize the flap
by dragging its
bottom gray edge.
-- Script Editor ("scriptor") Redesign.
Layout, colors, proportions, menus, and fonts have all been
A "Gold Box" has been added -- click on it to get a palette of
useful tiles; click
on any item in the palette to get a copy of it for use in your
-- Better Drop Zone Feedback in Scriptors.
The green drop zone that shows when dragging over a script is
-- Right Click for Halo.
On Windows, the default is changed so that right mouse button
brings up the halo.
-- Opening Screen.
The start-up screen now provides links to tutorials and example
"Notes on Compatibility"
Most projects created in an older "Squeakland" version should load
and work fine in the new system. (However, projects created in the
new etoys system will *not* be
usable in any older Squeakland version.)
A few old projects may exhibit different behavior when loaded into
the new system. Here are some things to watch out for:
- Because of the arithmetic operator precedence change, a script
that contains a long chain of arithmetic may produce different
results; e.g., "3 * 4 + 5" used to be interpreted as "3 * (4 + 5)"
and the result was 27, but now it is "(3 * 4) + 5" and the result is
17. Such a script should be editted (perhaps adding the
"parenthesis" described above) to be properly interpreted.
- The size and look of scriptors and viewers will change upon
loading. The new shapes may hide other carefully located
objects, and if the project depends on the specific sizes of these
tools, it may not work in the same way.
- The changes to Kedama are great enough that, although an old
project with Kedama
may load and may even run acceptably, it is guaranteed that
editing an old
project in the new release does not work. For proper migration
of any Kedama
project, the project should be built afresh in the new system;
the semantics change may require some changes to the project's
only applies to projects that have the small window where one
hundreds of tiny turtles and patches.
All in all, we hope this version will be seen as a great opportunity
to redo existing interesting projects, if needed. Such projects can
be shared among the millions of of Etoys users including XO users.
We hope that by using Etoys, you, or your children will learn more
about how our world works and have fun in the process!
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