Resizing During Resizing

[Rob Cozens]

Hi All,

I want to be able to change the height or width of a stack from 
inside the stack's resizeStack handler without triggering a second 
resizeStack message.

I have created a portfolio of photographs of my wife's art.  All 
photos have a 3 (w) to 2 (h) orientation/proportion and the stack 
layout is designed to retain same.  In resizeStack, I check to see 
whether the user has resized the height to a greater degree than the 
width or vice versa, and then change the other dimension to retain 
the 3 to 2 proportion.  Here is a test handler based on my handler:

on resizeStack newWidth,newHeight,oldWidth,oldHeight
   beep
   lock screen
   put abs(newWidth-oldWidth) into widthDifference
   put abs(newHeight-oldHeight) into heightDifference
   lock messages
   if widthDifference >= heightDifference then set the height of this 
stack to trunc((newWidth/3)*2)
   else set the width of this stack to trunc((newHeight/2)*3)
   unlock messages
   unlock screen
end resizeStack

When I run this handler I hear two beeps, indicating that a 
resizeStack message is sent when a stack dimension is changed, even 
though I have locked messages.   I suppose I could add logic to set 
and check a local variable; but I'm wondering--

	* Does this happen in 2.6.1?
	* Why does the second resizeStack message get sent when messages are locked?
	* Why doesn't the logic loop recursively (ie: why doesn't the second 
resizeStack message trigger a third)?

Rob Cozens CCW
Serendipity Software Company

"And I, which was two fooles, do so grow three;
  Who are a little wise, the best fooles bee."

  from "The Triple Foole" by John Donne (1572-1631)