Am Jan 23, 2007 um 19:01 schrieb Steven Greenberg:

Hi. I would like to use EToys for a project but I'm having a hard time adding my own actions. I suspect that I am missing something obvious, and would appreciate any pointers you could offer. I've tried to RTFM, but I can't find the FM so I'm kind of stuck.

So... As a test case, I decided that I would make some simple methods to animate the opacity of a Morph. I also wanted to add an instance variable and manipulate it.

So I created a subclass of Morph and, on the class side, added:

additionsToViewerCategories

^ #(
    (#seg
        ( (slot grink  'grink is a nonsense variable' String   

readWrite Player getGrink Player setGrink:) (command changeOpacityLevel: 'change the opacity level' Player) )))

and I created #getGrink, #setGrink:, and #changeOpacityLevel: on the new subclass of Morph.

When I instantiate the new object and open an etoys viewer, the "seg" category is there but it is empty.

In Etoys you are scripting Players, not Morphs. The Morphs are just a costume for a Player. You need to add those methods to class Player, and forward them to its costume.

- Bert -

Am Jan 23, 2007 um 19:01 schrieb Steven Greenberg:

I'm running the latest Squeak 3.9 image on a Mac, downloaded form squeak.org.

You should be using the OLPC version for doing etoys, which is based on Squeak 3.8. See

http://wiki.laptop.org/go/Etoys

Etoys projects made in Squeak 3.9 are not compatible with OLPC etoys projects and vice versa.

- Bert -