[plt-scheme] Q. about editor<%> internal-locks

On Oct 7, 2009, at 4:16 PM, Matthew Flatt wrote:

> At Wed, 7 Oct 2009 12:58:31 -0700, John Clements wrote:
>> On Oct 7, 2009, at 12:31 PM, Robby Findler wrote:
>>
>>> Are you accessing the editor from more than one thread?
>>
>> No.  In particular, the only references to this editor are
>>
>> 1) it's embedded in a canvas which is part of a visible pane, and
>> 2) There's an "update" method that is called by only one thread.
>
> So the "one thread" in #2 is the same as the canvas's eventspace's
> handler thread?

Does the canvas have its own eventspace, or does it use the frame's  
eventspace?

What's the right way to modify the editor in a thread other than the  
eventspace handler thread?

(Asking because I've seen this error in the macro stepper and never  
been able to reproduce or diagnose it.)

Ryan