Question About PreOpenStack

Peter M. Brigham, MD pmbrig at gmail.com
Fri Sep 9 17:18:34 CDT 2011


The other way of handling this is to have a mainstack that is really just a splash stack + library, it doesn't even have to show itself on startup (put "on preopenstack; hide this stack; end preopenstack" into the script of card 1 of the mainstack). Then put whatever you want for preopenstack behaviors in individual substacks, and don't put anything in the mainstack script except your library of handlers that need to be available in all stacks. Of course if there is default preopenstack behavior you need to have operating for all the substacks, you can put that in the mainstack script. Any substack that has its own preopenstack handler will trap the message (unless you pass it), and any stack without its own preopenstack handler will not intercept the preopenstack message and the mainstack script will catch it and handle the default action.

If you're planning on making a standalone, you don't want your library in the mainstack -- in that case a truly minimal mainstack script is called for, and the library of common handlers should be in a separate library stack that is put in use by the mainstack when it opens.

-- Peter

Peter M. Brigham
pmbrig at gmail.com
http://home.comcast.net/~pmbrig

On Sep 9, 2011, at 5:59 PM, Jonathan Lynch wrote:

> I always put empty preopenstack, openstack, preopencard,
> and opencard handlers for my substacks. I also put in a closestack handler
> in the substack that tells the substack to close. This seems like it should
> just be a standard thing to do when making substacks. This will prevent any
> stray messages from traveling up to the mainstack and causing problems.
> 
> On Fri, Sep 9, 2011 at 5:40 PM, J. Landman Gay <jacque at hyperactivesw.com>wrote:
> 
>> On 9/9/11 2:09 PM, Scott Rossi wrote:
>> 
>>> Recently, Gregory Lypny wrote:
>>> 
>>> I have a main stack with a PreOpenStack handler and sub-stacks with
>>>> PreOpenStack handlers.  Why is it that when I click a Go button in the
>>>> main
>>>> stack that opens a sub-stack, the PreOpenStack handler in the main stack
>>>> is
>>>> executed?
>>>> 
>>> 
>>> Messages from substacks automatically "fall through" to the script of the
>>> mainstack.  If you don't want this behavior, you can:
>>> 
>> 
>> Except it should go card -> substack stack script -> mainstack stack
>> script. I thought.
>> 
>> Greg says it doesn't.
>> 
>> --
>> Jacqueline Landman Gay         |     jacque at hyperactivesw.com
>> HyperActive Software           |     http://www.hyperactivesw.com
>> 
>> 
>> ______________________________**_________________
>> use-livecode mailing list
>> use-livecode at lists.runrev.com
>> Please visit this url to subscribe, unsubscribe and manage your
>> subscription preferences:
>> http://lists.runrev.com/**mailman/listinfo/use-livecode<http://lists.runrev.com/mailman/listinfo/use-livecode>
>> 
> 
> 
> 
> -- 
> Do all things with love
> _______________________________________________
> use-livecode mailing list
> use-livecode at lists.runrev.com
> Please visit this url to subscribe, unsubscribe and manage your subscription preferences:
> http://lists.runrev.com/mailman/listinfo/use-livecode




More information about the use-livecode mailing list