Object>>currentHand vs. Project class>>returnToPreviousProject
Andreas Raab
andreas.raab at gmx.de
Sat Jul 19 14:58:49 UTC 2003
Ned,
You're right. Upon returning from an MVC project we need to set ActiveHand
to something valid. Probably in Project>>enter:revert:saveForRevert:
something along the lines of:
(world isMorph and:[ActiveHand == nil]) ifTrue:[
"make sure we have a valid hand for Morphic"
ActiveHand := world primaryHand.
].
should do the trick. It's funny we never ran into that before - seems like
not too many people use MVC projects anymore ;)
Cheers,
- Andreas
> -----Original Message-----
> From: squeak-dev-bounces at lists.squeakfoundation.org
> [mailto:squeak-dev-bounces at lists.squeakfoundation.org] On
> Behalf Of Ned Konz
> Sent: Saturday, July 19, 2003 4:39 PM
> To: squeak-dev at lists.squeakfoundation.org
> Subject: Object>>currentHand vs. Project
> class>>returnToPreviousProject
>
>
> The comment in Object>>currentHand reads:
>
> "Return a usable HandMorph -- the one associated with the object's
> current environment. This method will always return a hand, even if
> it has to conjure one up as a last resort. If a particular hand is
> actually handling events at the moment (such as a remote hand or a
> ghost hand), it will be returned."
>
> However, it no longer does that. Instead it returns ActiveHand, which
> happens to not be set when returning from an MVC project to a Morphic
> project (via Project class>>returnToPreviousProject).
>
> Likewise, "World activeHand" or "self world activeHand" (from the
> point of view of a Morph in the world you're returning to) is nil.
>
> This is mostly no big deal (though I just got bit by it in the
> HandMagnifier), but should we:
>
> (A) fix the comment, or
> (B) fix the behavior to return a new HandMorph if ActiveHand is nil
>
> --
> Ned Konz
> http://bike-nomad.com
> GPG key ID: BEEA7EFE
>
>
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