topstack empty?

[Richard Gaskin]

MisterX wrote:
 > Richard wrote:
 >>>Under what circumstances should "the topstack" return empty?
 > when the topstack is not there ;)
 >
 > If you open RR and dont open a stack (that is not a palette or modal)
 > the topstack returns empty. Same behavior as with the selobj...

How are topstack and selectedObject related?

 > naturally, if you try this, the topstack is
 > stack "F:/mc/Revolution/components/tools/revmenubar.rev"

That's my point, and the source of the mystery:  in order for the engine 
to remain active it must always have one window open.

In the circumstance that gave rise to the question there are actually 
several:  one toplevel stack and five palette stacks.  Normally I would 
expect that the topstack would refer to the toplevel stack, and if that 
were closed it would return the topmost palette stack. Yet in my 
circumstance I have a script that checks "the long name of the topstack" 
and it was causing errors so I had it put the topstack and it put empty.

Hmmmmm....

The more I think about this something occurs to me:  the bug is 
triggered when going between two toplevel stacks in the same window ("go 
cd xxx of stack yyy in window of this stack"), and the script triggering 
the error is in a preOpenStack handler.  Maybe what's happening is that 
since preOpenStack happens before the stack is drawn, yet the other 
stack is effectively no longer in that window, so there is a window 
which for that moment is in a sort of limbo, no longer belonging to that 
stack that was there but without the next one being rendered into it.

Is that a bug?  I so, what should one expect the topStack to return 
under these circumstances, the stack that's been closed or the one that 
hasn't opened yet?

A Zen koan in Transcript....

-- 
  Richard Gaskin
  Fourth World Media Corporation
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  Rev tools and more:  http://www.fourthworld.com/rev