LiveCode Forums.

Posted: **Mon Oct 23, 2017 5:28 pm**

Hello,

So the way LC works, if a handler is triggered by a handler on a different stack, the second handler looks for objects on the stack of the original handler.

example:

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on mouseup --Card A of Stack A
   send "myHandler" to stack "AnotherStack"
end mouseup

on myHandler --Card A of Stack B
   put "hello" into fld "test"
end myHandler

Result: fld "test" isn't found, because it's on Stack B, not Stack A.

How can I tell Card A of Stack B to look at its own objects instead of the objects of Stack A?
Obviously I can use

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put "hello" into fld "test" of card A of Stack B

but I have hundreds of fields and I would rather keep my code tidier than that.

Putting

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go card A of Stack B

or

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open card A of Stack B

doesn't change anything, unfortunately.

Any ideas?

Posted: **Mon Oct 23, 2017 5:53 pm**

You could set "the defaultstack" first in your handler:

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on myHandler --Card A of Stack B
   set the defaultstack to "B"
   put "hello" into fld "test"
end myHandler

Is a bit of work, but if you are "sending" lots of things, it is worth the effort.

Posted: **Mon Oct 23, 2017 6:35 pm**

This might run into trouble if there were three or more stacks worth of "sending. You might, of course, log the stacks as you go.

I run into something like this all the time with subStacks on a current project . My issue is that the mainstack name changes constantly, though its substacks never do. So I simply:

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get fld 1 of the mainStack of this stack
  or
go stack the mainstack of this stack

That sort of thing. in this way each subStack knows who its "parent" is, regardless of any property changes of that parent. Just a variation on a theme.

Craig Newman

Posted: **Mon Oct 23, 2017 8:36 pm**

Klaus wrote: ↑
Mon Oct 23, 2017 5:53 pm
You could set "the defaultstack" first in your handler...

I think this will work well. Thanks, Klaus.

dunbarx wrote: ↑
Mon Oct 23, 2017 6:35 pm
in this way each subStack knows who its "parent" is, regardless of any property changes of that parent. Just a variation on a theme.

Good to know for the future!

Posted: **Tue Oct 24, 2017 5:18 pm**

This situation is what the "call" command is for. Try that instead of "send". (Not tested but theoretically should work.)

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