On 5/20/2010 2:47 AM, Igor Stasenko wrote:
> Then we can make an easy transition
> 1. add this pool to classes which using that global&  recompile them
>
> 2. for classes, which should have no dependency from Morphic,
> use a messages like
>
> Object>>  currentWorld
>     ^ (Smalltalk at: #MorphicPool ifAbsent: [ self error: 'bummer' ])
> currentWorld .

I think that's the wrong way to deal with the problem. A polymorphic 
implementation via Project works much better, i.e.,

Object>>currentWorld
	^Project current world

and then

Project>>world
	"No worlds here"
	^nil

MorphicProject>>world
	^world

etc. Then you don't need any globals at all.

> Then, i hope, you can unload the Morphic using MC and it will leave no
> trace in an image (or at least less trace than usual ;).
>
> Same could be applied to Graphics package (to get rid a Display global)

And the same applies. The pattern should be "Project current display".

Cheers,
   - Andreas