Handling a system shutdown

[depstein at att.net]

Handling a "shutDownRequest" message lets us interrupt the process of Quitting 
Metacard in order to make sure things are properly saved.  But on my Mac OS9.2 
it does not appear that this message is generated if the user is in the Finder 
and chooses "Shut Down" while Metacard is running in the background.  Is there 
any way to intercept this shutdown process--as most commercial programs do--so 
that Metacard does not quit without giving the user a chance to save unsaved 
changes?

David Epstein
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> Today's Topics:
> 
>    1. Re: Can't delete card (Alain Farmer)
>    2. Re: Can't delete card (Mark Talluto)
>    3. Re: Can't delete card (Ken Ray)
> 
> --__--__--
> 
> Message: 1
> Date: Tue, 10 Dec 2002 18:38:05 -0800 (PST)
> From: Alain Farmer <alain_farmer at yahoo.com>
> Subject: Re: Can't delete card
> To: metacard at lists.runrev.com
> Reply-To: metacard at lists.runrev.com
> 
> > When I try to delete a card via a bg script, I am
> > given an Error message (...). the error message:

> > Object: stack locked, or object's script is
> > executing Chunk: can't delete object
> > Is there a rationale behind this?
> 
> Put the "delete" handler higher up in the hierarchy,
> e.g. in the bg-script or in the stack-script. The
> rationale is that you cannot delete the card that
> contains the running handler. BTW it is still
> "running" even though all of the statements have been
> executed, because the last line has not executed yet,
> e.g. the "end handlerName"
> 
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> --__--__--
> 
> Message: 2
> Date: Tue, 10 Dec 2002 19:14:53 -0800
> Subject: Re: Can't delete card
> From: Mark Talluto <lists at canelasoftware.com>
> To: metacard at lists.runrev.com
> Reply-To: metacard at lists.runrev.com
> 
> 
> On Tuesday, December 10, 2002, at 06:38 PM, Alain Farmer wrote:
> 
> >> When I try to delete a card via a bg script, I am
> >> given an Error message (...). the error message:

> >> Object: stack locked, or object's script is
> >> executing Chunk: can't delete object
> >> Is there a rationale behind this?
> >
> > Put the "delete" handler higher up in the hierarchy,
> > e.g. in the bg-script or in the stack-script. The
> > rationale is that you cannot delete the card that
> > contains the running handler. BTW it is still
> > "running" even though all of the statements have been
> > executed, because the last line has not executed yet,
> > e.g. the "end handlerName"
> >
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> >
> 
> All you have to do is use the send command to call another handler 1- 2 
> seconds later to do the delete card job for you.  You may need to have 

> the handler being called by send put in the stack or some other 
> location that is not where the card to be deleted is.
> 
> 
> 
> Best regards,
> Mark Talluto
> http://www.canelasoftware.com
> 
> 
> --__--__--
> 
> Message: 3
> From: "Ken Ray" <kray at sonsothunder.com>
> To: <metacard at lists.runrev.com>
> Subject: Re: Can't delete card
> Date: 	Tue, 10 Dec 2002 21:19:26 -0600
> Organization: Sons of Thunder Software
> Reply-To: metacard at lists.runrev.com
> 
> > All you have to do is use the send command to call another handler 1- 2
> > seconds later to do the delete card job for you.  You may need to have
> > the handler being called by send put in the stack or some other
> > location that is not where the card to be deleted is.
> 
> Actually you don't have to wait even that long; you can do a send in 100 ms
> or less to have it work as well...
> 
> Ken Ray
> Sons of Thunder Software
> Email: kray at sonsothunder.com
> Web Site: http://www.sonsothunder.com/
> 
> 
> 
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