Re: usage of "this"

[Rob Cozens]

 > if tCalcType is not empty then

 go to first card of stack tCalcType as toplevel
 -- close the the current... the stack we were just in.
 -- close this stack -- nope; "this stack" has now changed!
 close stack "FacilityCalculator"
 end if

While I'm still simply a newbie lurker... I think your answer lies in a post
on 10/24 from Rob Cozens titled "Heads Up For HyperCard Stack Converters ".

Jim, Alex, et al:

To expand my previous post, I believe "this" can always be interpreted as "the current". For example, suppose I'm at card A and click on a button whose handler takes me to card B. If the short name of "this card" is displayed, it should be "A" before 'go to card "B"' and "B" after.

In the scenario above, dynamicPaths determines whether card A and its controls or card B and its controls receive messages after 'go to card "B"'. In standard RunRev (dynamicPaths = false) card A and its controls continue to receive messages until the handler ends. In converted HC stacks (dynamicPaths = true) card "B" receives all messages after 'go to card "B"'.

IMFO, Apple & HC did it wrong here: If one clicks on a control that goes to another card with dynamicPaths = true, the mouseLeave message is sent to the new card, not the one you just left. Without workaround scripting, the mouseLeave handler will generate a runtime error if there is no control on the new card with the same name, id, or number (depending on your form of reference) or the handler references other controls missing from the target card.

Way back when, before I knew about dynamicPaths, I asked Kevin to test the above scenario. I was SO pleased RunRev did not display HC's behavior in this regard. Virtually every OenoLog button with a mouseLeave handler contains or references a workaround for the dynamicPaths problem...it will feel SO good to delete all that verbiage.
--

Rob Cozens
CCW, Serendipity Software Company
http://www.oenolog.com/who.htm

"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)
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